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Comparative transcriptomics and weighted gene co-expression correlation network analysis (WGCNA) identified genes associated with fruit shape in pumpkin (Cucurbita maxima) 比较转录组学和加权基因共表达相关网络分析(WGCNA)确定了与南瓜(Cucurbita maxima)果实形状相关的基因
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-15 DOI: 10.1016/j.scienta.2024.113803
Xi Wei, Danni Wei, Lingjin Chen, Mai Chen, Xiaofu Tang
Pumpkin (Cucurbita maxima) is a prominent cultivar in China and is highly favored by consumers. Fruit shape is a critical agronomic trait in horticultural crops, which significantly contributes to their commercial value. In this study, we compared the two inbred lines of Cucurbita maxima, 'CNG2–3–1–1′ and 'BL27–3–2–1′, which exhibited significant difference in fruit shape. We observed that 'CNG2–3–1–1′ had a notably higher fruit shape index than 'BL27–3–2–1′, potentially due to variations in gene expression regulating cell division and expansion throughout fruit development. Furthermore, fruit shape was clearly discernible in both inbred lines at the ovary stage. Transcriptome sequencing was performed at five developmental stages of the inbred lines, coupled with weighted co-expression network analysis (WGCNA), to elucidate the molecular mechanisms and interaction networks of select differentially expressed genes involved in fruit shape regulation. The findings revealed the detection of 25,653 differentially expressed genes (DEGs). In the growth hormone signaling pathway, CmaAux/IAA, CmaAUX1, CmaGH3, and CmaSAUR, as well as CmaARR, CmaCRE1, and CmaAHP in the cytokinin signaling pathway, exhibited differential expression between the two inbred lines. Moreover, analysis of differentially expressed transcription factors across various developmental stages suggested that CmabHLH, CmaERF, CmaWRKY, CmaHD-ZIP, and CmaMYB transcription factors may be associated with fruit expansion. It is postulated that these factors interact with target genes to collectively govern cell division and expansion in both horizontal and vertical directions, thereby influencing fruit shape difference between the two inbred lines.
南瓜(Cucurbita maxima)是中国的一个重要栽培品种,深受消费者青睐。果形是园艺作物的一个关键农艺性状,对其商业价值有重要影响。本研究比较了两个近交系 "CNG2-3-1-1′"和 "BL27-3-2-1′"在果实形状上的显著差异。我们观察到,'CNG2-3-1-1′的果形指数明显高于'BL27-3-2-1′,这可能是由于在整个果实发育过程中,调控细胞分裂和扩展的基因表达发生了变化。此外,这两个近交系在子房阶段的果实形状都很明显。在近交系的五个发育阶段进行了转录组测序,并结合加权共表达网络分析(WGCNA),以阐明参与果实形状调控的部分差异表达基因的分子机制和相互作用网络。研究结果发现了25653个差异表达基因(DEGs)。在生长素信号通路中,CmaAux/IAA、CmaAUX1、CmaGH3和CmaSAUR以及细胞分裂素信号通路中的CmaARR、CmaCRE1和CmaAHP在两个近交系之间表现出差异表达。此外,对不同发育阶段差异表达的转录因子的分析表明,CmabHLH、CmaERF、CmaWRKY、CmaHD-ZIP 和 CmaMYB 转录因子可能与果实膨大有关。据推测,这些因子与目标基因相互作用,共同调控细胞在水平和垂直方向上的分裂和膨大,从而影响两个近交系之间的果实形状差异。
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引用次数: 0
Nitric oxide fumigation maintains cantaloupe fruit quality by regulating the production of reactive oxygen species 一氧化氮熏蒸通过调节活性氧的产生保持哈密瓜果实的品质
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-14 DOI: 10.1016/j.scienta.2024.113801
Yukun Meng, Yilidana Dilixiati, Xiaoyang Zhu, Wenjian Shi, Bin Wu, Jide Wang, Jia Wei
Cantaloupe (Cucumis melo L.) is a major crop cultivated in Northwest China. However, with the extension of storage periods, cantaloupes are increasingly prone to post-ripening senescence, quality deterioration, rot, and other phenomena, which in turn seriously limit shelf life. During postharvest storage, the quality of cantaloupes is affected by a large increase in ROS in the fruit. Herein, the effects of exogenous NO fumigation treatment on the quality of Xizhoumi NO.17 cantaloupe were investigated, with a focus on ROS generation and removal. NO fumigation treatment effectively reduced the rate of cantaloupe decay, inhibited fruit water loss and better maintained fruit firmness and relative conductivity. NO treatment induced O2· and H2O2 production during early storage (within 24 h), whereas their accumulation decreased during later storage. NOX activity and expression of related genes in the treatment group were higher than those in the control group during the early storage but lower during later storage. NO fumigation also induced the antioxidant capacity of enzymatic and non-enzymatic systems in cantaloupe and helped to inhibit the accumulation of ROS. Taken together, NO fumigation triggers H2O2 production via the NOX/SOD system, activating the antioxidant response of cantaloupe to overcome excessive ROS production in the late stage of storage, thus maintaining fruit quality.
哈密瓜(Cucumis melo L.)是中国西北地区的主要农作物。然而,随着贮藏期的延长,哈密瓜越来越容易出现后熟衰老、品质下降、腐烂等现象,从而严重限制了货架期。在采后贮藏过程中,果实中 ROS 的大量增加会影响哈密瓜的品质。在此,研究了外源氮氧化物熏蒸处理对西周蜜 NO.17 哈密瓜品质的影响,重点关注 ROS 的产生和去除。氮氧化物熏蒸处理有效降低了哈密瓜的腐烂率,抑制了果实失水,更好地保持了果实硬度和相对电导率。在贮藏早期(24 小时内),氮氧化物处理会诱导 O2 和 H2O2 的产生,而在贮藏后期,它们的积累会减少。处理组的 NOX 活性和相关基因的表达量在贮藏初期高于对照组,但在贮藏后期则低于对照组。氮氧化物熏蒸还能提高哈密瓜酶和非酶系统的抗氧化能力,并有助于抑制 ROS 的积累。综上所述,氮氧化物熏蒸可通过 NOX/SOD 系统引发 H2O2 的产生,激活哈密瓜的抗氧化反应,以克服贮藏后期过量 ROS 的产生,从而保持果实的品质。
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引用次数: 0
Variations in the nutritional profile and colour parameters of sweet potato varieties with different flesh colours: Effects of cropping system, mulching and growing season 不同肉色甘薯品种的营养成分和颜色参数的变化:耕作制度、地膜覆盖和生长季节的影响
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-14 DOI: 10.1016/j.scienta.2024.113807
Lovro Sinkovič, Mohamed Neji, Nataša Kunstelj, Barbara Pipan, Vladimir Meglič
The study investigated the effects of cropping system (CS), mulching (M) and year (Y) on the nutritional profile and colour parameters of four sweet potato varieties, namely Purple Speclet, Martina, Janja and Lučka. The results showed that the variations were mainly due to the genetic makeup of the varieties, with Purple Speclet having the highest dry matter, protein, vitamin C content, total phenolic content, antioxidant potential and total soluble solids. Lučka had the highest total sugar content, while Martina and Janja only stood out in terms of glucose content. The nutritional parameters correlated strongly with the colour parameters, suggesting that colour could be a useful indicator for predicting the nutritional quality of sweet potatoes. Nutritional parameters such as total phenolic content (TPC), vitamin C, antioxidant activity (AOP) and dry matter (DM) were significantly influenced by growing season, cropping system and mulching. The growing season had the greatest influence on TPC, vitamin C, AOP and DM. Mulching had the highest impact on DM, glucose content and vitamin C, while the cropping system had the highest impact on vitamin C, AOP and protein content. In particular, organic farming without PE mulching during the growing season resulted in higher levels of vitamin C, TPC and AOP, especially in relatively less favourable weather conditions. However, when PE mulch was used, there was a significant decrease in TPC and AOP. In contrast, no significant environmental influence was observed for the colour parameters, evidently differentiated in the purple-fleshed genotype with respect to the others, indicating that they are predominantly under strong genetic control. The results could help to introduce nutrient-rich sweet potato varieties into sustainable cropping systems and promote the production of sweet potatoes in Europe, particularly the Slovenian varieties Lučka, Martina and Janja, which have not been widely cultivated to date.
该研究调查了耕作制度(CS)、地膜覆盖(M)和年份(Y)对四个甘薯品种(即 Purple Speclet、Martina、Janja 和 Lučka)的营养成分和颜色参数的影响。结果表明,这些变化主要是由品种的遗传构成造成的,其中 Purple Speclet 的干物质、蛋白质、维生素 C 含量、总酚含量、抗氧化潜力和总可溶性固形物含量最高。Lučka 的总糖含量最高,而 Martina 和 Janja 仅在葡萄糖含量方面表现突出。营养参数与颜色参数密切相关,这表明颜色可以作为预测红薯营养质量的有用指标。总酚含量(TPC)、维生素 C、抗氧化活性(AOP)和干物质(DM)等营养参数受生长季节、耕作制度和地膜覆盖的影响很大。生长季节对总酚含量、维生素 C、抗氧化活性和干物质的影响最大。地膜覆盖对 DM、葡萄糖含量和维生素 C 的影响最大,而耕作制度对维生素 C、AOP 和蛋白质含量的影响最大。尤其是在生长季节不使用聚乙烯地膜覆盖的有机耕作,维生素 C、TPC 和 AOP 含量更高,特别是在天气条件相对较差的情况下。然而,当使用聚乙烯覆盖物时,TPC 和 AOP 的含量显著下降。与此相反,在颜色参数方面没有观察到明显的环境影响,紫肉基因型与其他基因型明显不同,这表明它们主要受遗传的强烈控制。研究结果有助于将营养丰富的甘薯品种引入可持续种植系统,促进欧洲的甘薯生产,尤其是迄今尚未广泛种植的斯洛文尼亚品种 Lučka、Martina 和 Janja。
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引用次数: 0
Corrigendum to ‘Seasonal variation in calcium and ascorbic acid content at harvest related to internal browning in ‘Braeburn’ apple during controlled atmosphere storage’ [Scientia Horticulturae, Volume 297, (2022), 110943] 受控大气贮藏期间'Braeburn'苹果收获时钙和抗坏血酸含量的季节性变化与内部褐变的关系》[《园艺科学》,第 297 卷,(2022 年),110943]更正
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-14 DOI: 10.1016/j.scienta.2024.113784
Rachael Maree Wood, Magdalena Proske, Sergio Tonetto de Freitas, Christian Scheer, Ralf Thomas Vögele, Daniel Alexandre Neuwald
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引用次数: 0
Lipids modifications during walnut development: Changes in the composition and metabolic regulation of oil bodies 核桃发育过程中的脂质变化:油体成分和代谢调节的变化
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-14 DOI: 10.1016/j.scienta.2024.113800
Kaiyang Zhu, Zeyu Lu, Ji Ma, Ting Zhang, Hongjie Lei, Wenge Zhao, Huaide Xu, Mei Li
Walnut oil bodies (WOBs), the storage lipid organelles that forms and accumulates with walnut development. However, there is little literature about the lipid compositions and dynamic changes of WOBs during development. To address this gap in knowledge, lipidomics profile and metabolic modulation of WOBs during walnut (wen 185 cultivar) development (60, 74, 88, 102, 116, and 130 days after pollination, S1-S6) were analyzed using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). A total of 305 individual lipids in WOBs were mainly glycerolipids (79.34%), glycerophospholipids (12.13%), and fatty acyls (7.21%). Moreover, triacylglycerols, diacylglycerols, monoglycerides, free fatty acids, phosphatidylglycerols and phosphatidylcholines had high relative content. Notably, triacylglycerols were the most abundant lipids in WOBs at every stage and they were rich in unsaturated fatty acids, especially linoleic acid. With the walnut development, 209 lipids changed significantly between the S1 and S6 stages. The linoleic acid metabolism, glycerophospholipid metabolism and glycerolipid metabolism pathways were significantly enriched. Among the three metabolic pathways, linoleic acid metabolism had the greatest impact on WOBs formation and metabolism. Therefore, regulating linoleic acid metabolism would be one of the strategies to control the formation and metabolism of WOBs. Together, these findings contributed to further understanding of the potential mechanisms of lipid accumulation in WOBs.
核桃油体(WOBs)是随着核桃发育而形成和积累的贮藏脂质细胞器。然而,有关核桃油体在发育过程中的脂质组成和动态变化的文献很少。为了填补这一知识空白,我们使用超高效液相色谱-串联质谱(UPLC-MS/MS)分析了核桃(wen 185 栽培品种)发育过程(授粉后 60、74、88、102、116 和 130 天,S1-S6)中 WOBs 的脂质组学特征和代谢调控。WOB 中的 305 种单个脂类主要是甘油脂类(79.34%)、甘油磷脂类(12.13%)和脂肪酰类(7.21%)。此外,三酰甘油、二酰甘油、单甘油酯、游离脂肪酸、磷脂酰甘油和磷脂酰胆碱的相对含量也很高。值得注意的是,三酰甘油是每个阶段核桃仁中最丰富的脂类,它们富含不饱和脂肪酸,尤其是亚油酸。随着核桃的发育,209 种脂质在 S1 和 S6 阶段发生了显著变化。亚油酸代谢、甘油磷脂代谢和甘油酯代谢途径明显丰富。在这三条代谢途径中,亚油酸代谢对 WOBs 的形成和代谢影响最大。因此,调节亚油酸代谢将是控制 WOBs 形成和代谢的策略之一。这些发现有助于进一步了解 WOBs 中脂质积累的潜在机制。
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引用次数: 0
Pruning of the aerial part in tall sour passion fruit seedlings aiming at seedling quality and reproductive precocity 对高大酸百香果幼苗的气生部分进行修剪,以提高幼苗质量和生殖成熟度
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-14 DOI: 10.1016/j.scienta.2024.113765
Luanna Fernandes Pereira, Bruna Oliveira Monteiro, Ednilson Carvalho Teixeira, Carlos Eduardo Magalhães dos Santos, Sylvana Naomi Matsumoto
Biotic and abiotic stresses limit the growth, development, and production of sour passion fruit plants. The use of taller seedlings can reduce the vulnerability of the crop, as can cultivation in protected environments. However, due to the long period seedlings spend in the nursery, coupled with their continuous and indefinite growth, it is necessary to establish proper management to balance the growth of the aerial parts and the roots. Thus, the objective was to evaluate the effect of apical pruning of the aerial parts during the seedling formation phase, quantifying changes in the morphophysiology and reproductive cycle of plants grown both in a protected environment and in the open field. The treatments consisted of: control (T1), pruning after the emergence of the 4th, 7th, 9th, and 11th leaves (T2); 7th, 10th, 12th, and 14th leaves (T3); 10th, 13th, and 15th leaves (T4); and 7th oldest leaf, 10th, and 12th leaves (T5). During the seedling growth phase, all treatments with pruning management showed a greater stem diameter, exceeding 37 % compared to the control. Overall, when analyzing morphological and physiological parameters, treatment T3 stood out compared to the control. However, in the reproductive phase of the plant, both in open field and protected environments, treatments T2 and T4 showed over a 40 % increase in the flowering speed index compared to the control. These results impacted the higher harvest speed index in the first 40 days. However, these changes did not affect production and productivity, nor subsequent harvests.
生物和非生物胁迫限制了酸百香果植物的生长、发育和产量。使用较高的幼苗可以降低作物的脆弱性,在受保护的环境中栽培也是如此。然而,由于幼苗在苗圃中生长的时间较长,加之幼苗的持续和无限生长,有必要建立适当的管理,以平衡气生部分和根系的生长。因此,我们的目标是评估在幼苗形成期对气生部分进行顶端修剪的影响,量化在保护环境和露地栽培的植物在形态生理和生殖周期方面的变化。处理包括:对照(T1),第 4、第 7、第 9 和第 11 片叶萌发后修剪(T2);第 7、第 10、第 12 和第 14 片叶(T3);第 10、第 13 和第 15 片叶(T4);最老的第 7 片叶、第 10 和第 12 片叶(T5)。在幼苗生长阶段,与对照组相比,所有采用修剪管理的处理的茎干直径都比对照组大,超过 37%。总体而言,在分析形态和生理参数时,处理 T3 比对照突出。不过,在植物的生殖期,无论是在露地还是在保护环境中,处理 T2 和处理 T4 的开花速度指数都比对照组提高了 40% 以上。这些结果影响了头 40 天较高的收获速度指数。不过,这些变化并不影响产量和生产率,也不影响随后的收获。
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引用次数: 0
Combined transcriptome and metabolome analysis reveals the mechanism of fruit quality formation in different watermelon (Citrullus lanatus) cultivars 转录组和代谢组联合分析揭示了不同西瓜(Citrullus lanatus)栽培品种果实品质形成的机理
IF 3.9 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-14 DOI: 10.1016/j.scienta.2024.113797
Zhenzhen Peng , Shuhui Song , Daqi Fu , Jiahua Zhou , Hong Chang , Baogang Wang , Ranran Xu , Chao Zhang , Yunxiang Wang
Fruit characteristics (flesh color, sweetness, flavor, etc.) of watermelon are largely the result of human selection. In this study, we combined the metabolome and transcriptome to investigate differentially expressed genes and differential metabolites related to sugar-acid and flesh color in four commercial watermelon cultivars. Fifty-eight genes and nine metabolites were identified in the organic acid and sugar metabolism pathways. Six of these metabolites were significantly up-regulated in ‘Jingcai No.1’ (JC), including sucrose, fructose, cellobiose, oxaloacetate, succinate, and malate. The expression of sucrose synthase 2 (SUS2), sucrose-phosphate synthase (SPS1), fructose bisphosphate aldolase (FBA2), glyceraldehyde 3-phosphate dehydrogenase(GAPN), trehalose-phosphate phosphatase (TPPJ), trehalose-phosphate synthase (TPS1), 1,4-alpha-glucan-branching (SBE1) and SBE3, which are involved in sugar and acid metabolism, was also significantly higher than that of the other three cultivars. A total of 55 genes and 102 metabolites were identified in the pathway related to flesh color formation (carotenoid synthesis, phenylpropanoid synthesis, flavonoid synthesis). The abundance of genes and metabolites associated with sugar and acid metabolism and color formation were generally lower in ‘Jingmei 2k’ (EK) and ‘L600’ (LB) than in JC and ‘Chaoyue’ (CY). In summary, the omics analysis of the four watermelon cultivars revealed significant differences in metabolic genes and metabolites involved in sugar-acid biosynthesis and flesh color formation, which provides new ideas for improving the quality and commercial value of watermelon fruits through genetic engineering.
西瓜的果实特征(瓤色、甜度、风味等)在很大程度上是人类选择的结果。在本研究中,我们结合代谢组和转录组研究了四个商业西瓜栽培品种中与糖酸和果肉颜色相关的差异表达基因和差异代谢产物。在有机酸和糖代谢途径中发现了 58 个基因和 9 种代谢物。其中 6 种代谢物在 "京彩 1 号"(JC)中明显上调,包括蔗糖、果糖、纤维生物糖、草酰乙酸、琥珀酸和苹果酸。蔗糖合成酶 2(SUS2)、蔗糖磷酸合成酶(SPS1)、果糖二磷酸醛缩酶(FBA2)、3-磷酸甘油醛脱氢酶(GAPN)、三卤糖磷酸酶(TPPJ)、果糖二磷酸醛缩酶(FBA2)、3-磷酸甘油醛脱氢酶(GAPN此外,参与糖和酸代谢的三聚磷酸酯合成酶(TPS1)、1,4-α-葡聚糖支链(SBE1)和 SBE3 的含量也明显高于其他三个品种。在与果肉颜色形成有关的途径(类胡萝卜素合成、苯丙酮合成、黄酮合成)中,共鉴定出 55 个基因和 102 个代谢物。与糖、酸代谢和颜色形成相关的基因和代谢物的丰度在'京梅 2k'(EK)和'L600'(LB)中普遍低于 JC 和'Chaoyue'(CY)。综上所述,对四个西瓜栽培品种的omics分析表明,参与糖酸生物合成和果肉颜色形成的代谢基因和代谢产物存在显著差异,这为通过基因工程提高西瓜果实的品质和商业价值提供了新思路。
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引用次数: 0
The efficacy of soaking fresh-cut nectarines in melatonin concentrations and its effect on antioxidant capacity microbial content and storage quality 用褪黑激素浓度浸泡鲜切油桃的功效及其对抗氧化能力、微生物含量和贮藏质量的影响
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-14 DOI: 10.1016/j.scienta.2024.113792
Wenhan Li, Xihong Li, Haifen Wang, Zhaojun Ban, Xiangzheng Yang, Junhua Wang, Yanfang Pan, Yao Tang, Ziyun Liu, Yuqian Jiang
The study aimed to identify the optimal concentration of exogenous melatonin for fresh-cut nectarines by evaluating their quality attributes during storage at 0 °C with relative humidity (RH) of 85 % - 90 % after treatments with different concentrations (0 mM, 0.05 mM, 0.1 mM, and 0.5 mM, with 0 mM as the control). Furthermore, the optimal melatonin treatment concentration and control were used to analyze its effects on antioxidant capacity and tissue microstructure of fresh-cut nectarines. The results indicated that 0.1 mM melatonin was the most effective treatment concentration for maintaining the primary physicochemical qualities of the fresh-cut nectarines. On 12 d of the storage, the 0.1 mM melatonin-treated group showed significant increases of 4.09 % in total phenolic content and 5.78 % in ascorbic acid compared to the control group, with more retained tissue microstructure. Additionally, the treatment was observed with a reduction of 23.82 % in MDA content, 39.31 % in H2O2 content, and 34.26 % in superoxide anion levels, compared with the control. Moreover, the melatonin treatment inhibited the microbial growth and enhanced the antioxidant capacity of fresh-cut nectarines. Furthermore, 0.1 mM melatonin treatment reduced the gene expression and activity of POD and PPO enzymes, while increased the gene expression and activity of PAL and CHS enzymes. These findings demonstrate that 0.1 mM melatonin not only delays browning in fresh-cut nectarines but also improves their antioxidant capacity and storage quality, highlighting its potential as an effective post-harvest treatment strategy for reducing the reliance on synthetic preservatives in commercial applications.
该研究旨在确定外源褪黑激素在鲜切油桃中的最佳浓度,方法是在 0 °C 和相对湿度(RH)为 85 % - 90 % 的条件下贮藏期间,用不同浓度(0 mM、0.05 mM、0.1 mM 和 0.5 mM,0 mM 为对照)的褪黑激素处理后,评估其质量属性。此外,还利用最佳褪黑素处理浓度和对照组分析了其对鲜切油桃抗氧化能力和组织微观结构的影响。结果表明,0.1 mM 褪黑激素是保持鲜切油桃主要理化品质的最有效处理浓度。贮藏 12 天后,与对照组相比,0.1 mM 褪黑素处理组的总酚含量和抗坏血酸含量分别显著增加了 4.09 % 和 5.78 %,组织微观结构也得到了更好的保持。此外,与对照组相比,治疗组的 MDA 含量降低了 23.82%,H2O2 含量降低了 39.31%,超氧阴离子含量降低了 34.26%。此外,褪黑素还能抑制微生物的生长,提高鲜切油桃的抗氧化能力。此外,0.1 mM 褪黑激素处理降低了 POD 和 PPO 酶的基因表达和活性,而提高了 PAL 和 CHS 酶的基因表达和活性。这些研究结果表明,0.1 毫摩尔褪黑激素不仅能延缓鲜切油桃的褐变,还能提高其抗氧化能力和贮藏质量,突出了其作为一种有效的采后处理策略的潜力,从而减少商业应用中对合成防腐剂的依赖。
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引用次数: 0
Nitrogen form differently modulates nitrogen uptake and utilization and related gene expression between two tea cultivars 两种茶叶栽培品种的氮形态对氮吸收和利用及相关基因表达的不同调节作用
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-13 DOI: 10.1016/j.scienta.2024.113804
Dandan Tang, Zhen Jin, Lu Long, Zhongyue Zhang, Yanjuan Yang, Xiaoqin Tan, Chunjing Yang, Wei Chen, Liqiang Tan, Qian Tang
Nitrogen (N) is essential for the growth and development of tea plants, and ammonium (NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup>) and nitrate (NO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">-</ce:sup>) are crucial N sources for tea yield and amino acid contents. However, the uptake and utilization of different N forms in tea plants are different. Reasonable N form is an important means to enhance the growth and development of tea plants. Therefore, supplying suitable N forms may be effective way to optimize N use efficiency. A hydroponic trial was conducted with 'Chuancha No.2′ (CC) and 'Emeiwenchun' (EW) tea cultivars with N form treatments: NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup> and NO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">-</ce:sup>. The results showed that there were significant difference in the NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup>/NO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">-</ce:sup> uptake kinetics, dynamic changes in <ce:sup loc="post">15</ce:sup>N abundance, enzyme activities, and related gene expression in N metabolism between CC and EW after NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup>/NO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">-</ce:sup> treatment. In CC and EW, NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup> and NO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">-</ce:sup> uptake followed Michaelis-Menten kinetics at low N concentrations (< 1 mmol <ce:small-caps>l</ce:small-caps><ce:sup loc="post">-1</ce:sup>), but CC exhibited a slightly higher uptake rate than EW when supplied with 2 mmol <ce:small-caps>l</ce:small-caps><ce:sup loc="post">-1</ce:sup> NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup>. In a 0–24 h <ce:sup loc="post">15</ce:sup>N tracing experiment, CC roots accumulated <ce:sup loc="post">15</ce:sup>N faster than EW under NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup>. NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup>-fed CC exhibited higher GS activities and higher expression levels of <ce:italic>CsAMTs</ce:italic> and genes involved in N utilization, such as <ce:italic>CsNR, CsGS2, CsGDH1</ce:italic>, and <ce:italic>CsTS1</ce:italic>, compared to EW. When NO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">-</ce:sup> was provided, EW roots accumulated more <ce:sup loc="post">15</ce:sup>N than CC roots from 8 to 24 h, which could be attributed to the higher NR activities and higher expression levels of <ce:italic>CsNRT1.5, CsNR, CsGS1.1</ce:italic> and <ce:italic>CsGS1.2</ce:italic> than those in CC. In summary, the two tea varieties exhibited distinct characteristics of N uptake and utilization, as well as gene expression patterns under NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup>/NO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">-</ce:sup> treatments. CC demonstrated an advantage in NH<ce:inf loc="post">4</ce:inf><ce:sup loc="post">+</ce:sup> upta
氮(N)对茶树的生长发育至关重要,而铵(NH4+)和硝酸盐(NO3-)是茶叶产量和氨基酸含量的关键氮源。然而,茶树对不同形态氮的吸收和利用是不同的。合理的氮形态是促进茶树生长发育的重要手段。因此,提供合适的氮形态可能是优化氮利用效率的有效方法。本研究以 "川茶 2 号"(CC)和 "峨眉文春"(EW)为茶树品种,进行了氮形态处理的水培试验:NH4+ 和 NO3-。结果表明,NH4+/NO3-处理后,CC和EW对NH4+/NO3-的吸收动力学、15N丰度的动态变化、酶活性以及氮代谢相关基因的表达均存在显著差异。在低氮浓度(< 1 mmol l-1)下,CC和EW对NH4+和NO3-的吸收遵循Michaelis-Menten动力学,但在提供2 mmol l-1 NH4+时,CC的吸收率略高于EW。在 0-24 h 15N 追踪实验中,在 NH4+ 条件下,CC 根系积累 15N 的速度比 EW 快。与 EW 相比,NH4+喂养的 CC 表现出更高的 GS 活性和更高的 CsAMTs 以及参与氮利用的基因(如 CsNR、CsGS2、CsGDH1 和 CsTS1)表达水平。当提供NO3-时,EW根系在8-24 h内比CC根系积累了更多的15N,这可能是由于EW根系比CC根系具有更高的NR活性和更高的CsNRT1.5、CsNR、CsGS1.1和CsGS1.2的表达水平。总之,在 NH4+/NO3- 处理下,两个茶树品种表现出不同的氮吸收和利用特征以及基因表达模式。CC在NH4+吸收和同化方面表现出优势,而EW则在NO3-方面表现出优势。
{"title":"Nitrogen form differently modulates nitrogen uptake and utilization and related gene expression between two tea cultivars","authors":"Dandan Tang, Zhen Jin, Lu Long, Zhongyue Zhang, Yanjuan Yang, Xiaoqin Tan, Chunjing Yang, Wei Chen, Liqiang Tan, Qian Tang","doi":"10.1016/j.scienta.2024.113804","DOIUrl":"https://doi.org/10.1016/j.scienta.2024.113804","url":null,"abstract":"Nitrogen (N) is essential for the growth and development of tea plants, and ammonium (NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt;) and nitrate (NO&lt;ce:inf loc=\"post\"&gt;3&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;-&lt;/ce:sup&gt;) are crucial N sources for tea yield and amino acid contents. However, the uptake and utilization of different N forms in tea plants are different. Reasonable N form is an important means to enhance the growth and development of tea plants. Therefore, supplying suitable N forms may be effective way to optimize N use efficiency. A hydroponic trial was conducted with 'Chuancha No.2′ (CC) and 'Emeiwenchun' (EW) tea cultivars with N form treatments: NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt; and NO&lt;ce:inf loc=\"post\"&gt;3&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;-&lt;/ce:sup&gt;. The results showed that there were significant difference in the NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt;/NO&lt;ce:inf loc=\"post\"&gt;3&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;-&lt;/ce:sup&gt; uptake kinetics, dynamic changes in &lt;ce:sup loc=\"post\"&gt;15&lt;/ce:sup&gt;N abundance, enzyme activities, and related gene expression in N metabolism between CC and EW after NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt;/NO&lt;ce:inf loc=\"post\"&gt;3&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;-&lt;/ce:sup&gt; treatment. In CC and EW, NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt; and NO&lt;ce:inf loc=\"post\"&gt;3&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;-&lt;/ce:sup&gt; uptake followed Michaelis-Menten kinetics at low N concentrations (&lt; 1 mmol &lt;ce:small-caps&gt;l&lt;/ce:small-caps&gt;&lt;ce:sup loc=\"post\"&gt;-1&lt;/ce:sup&gt;), but CC exhibited a slightly higher uptake rate than EW when supplied with 2 mmol &lt;ce:small-caps&gt;l&lt;/ce:small-caps&gt;&lt;ce:sup loc=\"post\"&gt;-1&lt;/ce:sup&gt; NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt;. In a 0–24 h &lt;ce:sup loc=\"post\"&gt;15&lt;/ce:sup&gt;N tracing experiment, CC roots accumulated &lt;ce:sup loc=\"post\"&gt;15&lt;/ce:sup&gt;N faster than EW under NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt;. NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt;-fed CC exhibited higher GS activities and higher expression levels of &lt;ce:italic&gt;CsAMTs&lt;/ce:italic&gt; and genes involved in N utilization, such as &lt;ce:italic&gt;CsNR, CsGS2, CsGDH1&lt;/ce:italic&gt;, and &lt;ce:italic&gt;CsTS1&lt;/ce:italic&gt;, compared to EW. When NO&lt;ce:inf loc=\"post\"&gt;3&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;-&lt;/ce:sup&gt; was provided, EW roots accumulated more &lt;ce:sup loc=\"post\"&gt;15&lt;/ce:sup&gt;N than CC roots from 8 to 24 h, which could be attributed to the higher NR activities and higher expression levels of &lt;ce:italic&gt;CsNRT1.5, CsNR, CsGS1.1&lt;/ce:italic&gt; and &lt;ce:italic&gt;CsGS1.2&lt;/ce:italic&gt; than those in CC. In summary, the two tea varieties exhibited distinct characteristics of N uptake and utilization, as well as gene expression patterns under NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt;/NO&lt;ce:inf loc=\"post\"&gt;3&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;-&lt;/ce:sup&gt; treatments. CC demonstrated an advantage in NH&lt;ce:inf loc=\"post\"&gt;4&lt;/ce:inf&gt;&lt;ce:sup loc=\"post\"&gt;+&lt;/ce:sup&gt; upta","PeriodicalId":21679,"journal":{"name":"Scientia Horticulturae","volume":"38 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142643171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Additional far-red increases fruit yield of greenhouse sweet pepper mainly through enhancing plant source strength 额外的远红外主要通过增强植物源强度来提高温室甜椒的果实产量
IF 4.3 2区 农林科学 Q1 HORTICULTURE Pub Date : 2024-11-13 DOI: 10.1016/j.scienta.2024.113787
Sijia Chen, Tijmen Kerstens, Baltasar Zepeda, Theoharis Ouzounis, Sebastian Olschowski, Leo F.M. Marcelis, Ep Heuvelink
Supplementary lighting is necessary for year-round greenhouse production of fruit vegetables in high-latitude regions. Far-red (FR) radiation can influence plant photomorphogenesis as well as photosynthesis. We aimed to identify the effects of supplementary FR on fruit set and yield of sweet pepper, and its underlying mechanisms via a yield component analysis. A 24-week greenhouse experiment was conducted with cultivars 'Gialte' and 'Margrethe', where FR was added to 190 μmol·m−2·s−1 of white supplementary light in four treatments: 0, 50 or 100 μmol·m−2·s−1 FR throughout the whole generative growth phase (since 8 weeks after transplanting), or 100 μmol·m−2·s−1 FR for only four weeks (12 to 16 weeks after transplanting). Fruit yield increased linearly with the cumulative amount of FR provided in supplementary light. The increased fruit dry weight with additional FR was mainly associated with an increased plant dry weight, accompanied by a marginal increase in the fraction of dry matter partitioned to fruits. The increase in plant dry weight resulted from an increased light use efficiency (plant dry weight per unit of supplementary photosynthetic active radiation (PAR) incident on top of the canopy) and an increased incident PAR (due to taller plants closer to the lamps). However, additional FR reduced radiation use efficiency (plant dry weight per unit of supplementary PAR plus FR incident on top of the canopy), indicating that additional FR was used less efficiently than PAR for biomass production. Additional FR enhanced fruit set percentage and fruit set fluctuations over time, where both long-term and short-term FR application elevated the subsequent fruit set peak after the start of FR application. Without additional FR, 17 % fruits in 'Gialte' and 25 % in 'Margrethe' showed medium or severe cracking. Additional FR substantially reduced this percentage to 8 % in both cultivars. We conclude that additional FR improves sweet pepper fruit set and yield in greenhouses, mainly by enhancing plant source strength.
在高纬度地区,全年温室果菜生产都需要补充光照。远红外线辐射可影响植物的光形态发生和光合作用。我们旨在通过产量成分分析,确定补充远红外线对甜椒坐果率和产量的影响及其内在机制。我们对栽培品种 "Gialte "和 "Margrethe "进行了为期 24 周的温室试验,在 190 μmol-m-2-s-1 的白光补充光中添加 FR,共分为四种处理:0、50 或 100 μmol-m-2-s-1 FR 贯穿整个生长期(自移栽后 8 周起),或 100 μmol-m-2-s-1 FR 仅持续四周(移栽后 12 至 16 周)。果实产量随补充光照的 FR 累积量的增加而线性增加。果实干重随补充光照的增加而增加,这主要与植株干重增加有关,同时果实干物质分配比例也略有增加。植株干重增加的原因是光利用效率(冠层顶部入射的每单位补充光合有效辐射(PAR)的植株干重)和入射 PAR 的增加(由于植株较高且更靠近灯管)。然而,额外的光合有效辐射降低了辐射利用效率(每单位补充光合有效辐射加上入射到冠层顶部的光合有效辐射的植物干重),这表明额外的光合有效辐射在生物量生产中的利用效率低于光合有效辐射。额外的 FR 提高了坐果率和坐果率随时间的波动,长期和短期 FR 的应用都提高了 FR 开始应用后的坐果峰值。在不添加阻燃剂的情况下,'Gialte'和'Margrethe'分别有 17% 和 25% 的果实出现中度或严重开裂。添加抗逆剂后,这两个品种的中度或重度开裂率大幅降低至 8%。我们的结论是,添加抗逆剂可提高温室甜椒的坐果率和产量,主要是通过增强植物源强度。
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引用次数: 0
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Scientia Horticulturae
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