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Analysis of the Effects of the Vrn-1 and Ppd-1 Alleles on Adaptive and Agronomic Traits in Common Wheat (Triticum aestivum L.) Vrn-1 和 Ppd-1 等位基因对普通小麦(Triticum aestivum L.)适应性和农艺性状的影响分析
Pub Date : 2024-05-23 DOI: 10.3390/plants13111453
Kirill O. Plotnikov, A. Klimenko, E. S. Ovchinnikova, S. Lashin, N. P. Goncharov
Wheat heading time is primarily governed by two loci: VRN-1 (response to vernalization) and PPD-1 (response to photoperiod). Five sets of near-isogenic lines (NILs) were studied with the aim of investigating the effect of the aforementioned genes on wheat vegetative period duration and 14 yield-related traits. Every NIL was sown in the hydroponic greenhouse of the Institute of Cytology and Genetics, SB RAS. To assess their allelic composition at the VRN-1 and PPD-1 loci, molecular markers were used. It was shown that HT in plants with the Vrn-A1vrn-B1vrn-D1 genotype was reduced by 29 and 21 days (p < 0.001) in comparison to HT in plants with the vrn-A1Vrn-B1vrn-D1 and the vrn-A1vrn-B1Vrn-D1 genotypes, respectively. In our study, we noticed a decrease in spike length as well as spikelet number per spike parameter for some NIL carriers of the Vrn-A1a allele in comparison to carriers of the Vrn-B1 allele. PCA revealed three first principal components (PC), together explaining more than 70% of the data variance. Among the studied genetic traits, the Vrn-A1a and Ppd-D1a alleles showed significant correlations with PCs. Regarding genetic components, significant correlations were calculated between PC3 and Ppd-B1a (−0.26, p < 0.05) and Vrn-B1 (0.57, p < 0.05) alleles. Thus, the presence of the Vrn-A1a allele affects heading time, while Ppd-D1a is associated with plant height reduction.
小麦的抽穗期主要受两个基因位点的控制:VRN-1(对春化的反应)和 PPD-1(对光周期的反应)。研究了五组近等基因系(NILs),目的是调查上述基因对小麦无性期持续时间和 14 个产量相关性状的影响。每个 NIL 都播种在 SB RAS 细胞学和遗传学研究所的水培温室中。为了评估它们在 VRN-1 和 PPD-1 基因座上的等位基因组成,使用了分子标记。结果表明,与 vrn-A1Vrn-B1vrn-D1 和 vrn-A1vrn-B1Vrn-D1 基因型植物的 HT 相比,Vrn-A1vrn-B1vrn-D1 基因型植物的 HT 分别缩短了 29 天和 21 天(p < 0.001)。在我们的研究中,我们注意到与 Vrn-B1 等位基因的携带者相比,一些 Vrn-A1a 等位基因的 NIL 携带者的穗长和每穗小穗数参数都有所下降。PCA 显示了三个第一主成分(PC),共同解释了 70% 以上的数据方差。在所研究的遗传特征中,Vrn-A1a 和 Ppd-D1a 等位基因与 PC 存在显著相关性。在遗传成分方面,PC3 与 Ppd-B1a 等位基因(-0.26,p<0.05)和 Vrn-B1 等位基因(0.57,p<0.05)之间存在明显的相关性。因此,Vrn-A1a 等位基因的存在会影响打顶时间,而 Ppd-D1a 则与植株高度降低有关。
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引用次数: 0
Comparative Metabolome and Transcriptome Analyses Reveal Differential Enrichment of Metabolites with Age in Panax notoginseng Roots 代谢组和转录组比较分析揭示了三七根中代谢物随年龄变化的富集差异
Pub Date : 2024-05-23 DOI: 10.3390/plants13111441
Xinru Yan, Ao Zhang, Yiming Guan, Jinlong Jiao, Murad Ghanim, Yayu Zhang, Xiahong He, Ruirui Shi
Panax notoginseng is a perennial plant well known for its versatile medicinal properties, including hepatoprotective, antioxidant, anti-inflammatory, anti-tumor, estrogen-like, and antidepressant characteristics. It has been reported that plant age affects the quality of P. notoginseng. This study aimed to explore the differential metabolome and transcriptome of 2-year (PN2) and 3-year-old (PN3) P. notoginseng plant root samples. Principal component analysis of metabolome and transcriptome data revealed major differences between the two groups (PN2 vs. PN3). A total of 1813 metabolites and 28,587 genes were detected in this study, of which 255 metabolites and 3141 genes were found to be differential (p < 0.05) between PN2 vs. PN3, respectively. Among differential metabolites and genes, 155 metabolites and 1217 genes were up-regulated, while 100 metabolites and 1924 genes were down-regulated. The KEGG pathway analysis revealed differentially enriched metabolites belonging to class lipids (“13S-hydroperoxy-9Z, 11E-octadecadionic acid”, “9S-hydroxy-10E, 12Z-octadecadionic acid”, “9S-oxo-10E, 12Z-octadecadionic acid”, and “9,10,13-trihydroxy-11-octadecadionic acid”), nucleotides and derivatives (guanine and cytidine), and phenolic acids (chlorogenic acid) were found to be enriched (p < 0.05) in PN3 compared to PN2. Further, these differentially enriched metabolites were found to be significantly (p < 0.05) regulated via linoleic acid metabolism, nucleotide metabolism, plant hormone signal transduction, and arachidonic acid metabolism pathways. Furthermore, the transcriptome analysis showed the up-regulation of key genes MAT, DMAS, SDH, gallate 1-beta-glucosyltransferase, and beta-D-glucosidase in various plants’ secondary metabolic pathways and SAUR, GID1, PP2C, ETR, CTR1, EBF1/2, and ERF1/2 genes observed in phytohormone signal transduction pathway that is involved in plant growth and development, and protection against the various stressors. This study concluded that the roots of a 3-year-old P. notoginseng plant have better metabolome and transcriptome profiles compared to a 2-year-old plant with importantly enriched metabolites and genes in pathways related to metabolism, plant hormone signal transduction, and various biological processes. These findings provide insights into the plant’s dynamic biochemical and molecular changes during its growth that have several implications regarding its therapeutic use.
三七是一种多年生植物,具有多种药用特性,包括保肝、抗氧化、抗炎、抗肿瘤、类雌激素和抗抑郁等。据报道,植株年龄会影响田七的质量。本研究旨在探讨 2 年生(PN2)和 3 年生(PN3)五加科植物根样本的代谢组和转录组的差异。代谢组和转录组数据的主成分分析显示了两组(PN2 与 PN3)之间的主要差异。本研究共检测到 1813 种代谢物和 28,587 个基因,其中 255 种代谢物和 3141 个基因在 PN2 与 PN3 之间存在差异(p < 0.05)。在差异代谢物和基因中,155 个代谢物和 1217 个基因上调,100 个代谢物和 1924 个基因下调。KEGG 通路分析显示,属于脂类的代谢物("13S-hydroperoxy-9Z, 11E-octadecadionic acid"、"9S-hydroxy-10E, 12Z-octadecadionic acid"、"9S-oxo-10E、12Z-octadecadionic acid "和 "9,10,13-trihydroxy-11-octadecadionic acid")、核苷酸及其衍生物(鸟嘌呤和胞苷)和酚酸(绿原酸)在 PN3 中富集(p < 0.05)。此外,还发现这些差异富集的代谢物受到亚油酸代谢、核苷酸代谢、植物激素信号转导和花生四烯酸代谢途径的显著调控(p < 0.05)。此外,转录组分析表明,各种植物次生代谢途径中的关键基因 MAT、DMAS、SDH、没食子酸酯 1-beta-葡萄糖基转移酶和 beta-D-葡萄糖苷酶以及植物激素信号转导途径中的 SAUR、GID1、PP2C、ETR、CTR1、EBF1/2 和 ERF1/2 基因都出现了上调,这些基因参与植物的生长和发育,并保护植物免受各种胁迫。这项研究得出结论,与 2 年生植物相比,3 年生植物的根部具有更好的代谢组和转录组图谱,在与新陈代谢、植物激素信号转导和各种生物过程相关的通路中,代谢物和基因都有重要的富集。这些发现有助于深入了解该植物在生长过程中的动态生化和分子变化,对其治疗用途具有重要意义。
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引用次数: 0
Spasmolytic, Antimicrobial, and Antioxidant Activities of Spray-Dried Extracts of Gentiana asclepiadea L. with In Silico Pharmacokinetic Analysis 龙胆草喷雾干燥提取物的解痉、抗菌和抗氧化活性及硅学药代动力学分析
Pub Date : 2024-05-23 DOI: 10.3390/plants13111445
M. Jovanović, Milica Milutinović, Suzana Branković, Tatjana Mihajilov-Krstev, Milica Randjelović, Bojana Miladinović, Nada Ćujić Nikolić, Katarina Šavikin, Dušanka Kitić
This study aimed to evaluate the spasmolytic activity of an underground parts extract of Gentiana asclepiadea L. (Gentianaceae), assess its antioxidant and antimicrobial activities, and explore the impact of extract encapsulation on the aforementioned bioactivities. An extract encapsulated by spray drying with whey protein, pure extract, and pure whey protein were comparatively tested. The main compounds identified via HPLC-DAD analysis underwent in silico ADME assessment. The spasmolytic effect was tested on a model of spontaneous rat ileum contractions, and the mechanism of action was further evaluated on acetylcholine-, KCl-, CaCl2-, BaCl2-, histamine-, N(ω)-nitro-L-arginine methyl ester-, and glibenclamide-modified contractions. The most abundant compounds were secoiridoids (dominantly gentiopicroside), followed by C-glycosylated flavonoids and xanthones. Both pure and encapsulated extracts achieved significant spasmolytic effects, despite the spasmogenic activity of pure whey protein. The extract may exert its spasmolytic effect through multiple pathways, predominantly by antagonizing the Ca2+ channel and opening the K+ channel, while the nitric oxide pathway appears not to be involved. The antimicrobial and antioxidant activities of the pure extract were moderate. The extract stabilized by encapsulation retained all of the tested bioactivities of the unencapsulated extract. The obtained results suggest that G. asclepiadea has potential for use in the treatment of some gastrointestinal complaints and that the encapsulated extract could be a valuable functional ingredient in pharmaceutical and food products.
本研究旨在评价龙胆科植物龙胆(Gentiana asclepiadea L.)地下部分提取物的解痉活性,评估其抗氧化和抗菌活性,并探讨提取物封装对上述生物活性的影响。比较测试了通过喷雾干燥与乳清蛋白封装的提取物、纯提取物和纯乳清蛋白。对通过 HPLC-DAD 分析确定的主要化合物进行了默克 ADME 评估。在大鼠回肠自发收缩模型上测试了其解痉作用,并在乙酰胆碱、KCl、CaCl2-、BaCl2-、组胺、N(ω)-硝基-L-精氨酸甲酯和格列本脲修饰收缩模型上进一步评估了其作用机制。最丰富的化合物是仲呋喃类化合物(主要是龙胆内酯),其次是 C-糖基化黄酮类化合物和黄酮类化合物。尽管纯乳清蛋白具有致痉挛活性,但纯提取物和封装提取物都具有显著的解痉作用。提取物可能通过多种途径发挥其解痉作用,主要是通过拮抗 Ca2+ 通道和打开 K+ 通道,而一氧化氮途径似乎没有参与其中。纯提取物的抗菌和抗氧化活性适中。通过封装稳定的提取物保留了未封装提取物的所有测试生物活性。研究结果表明,G. asclepiadea 具有治疗某些胃肠道疾病的潜力,封装提取物可以成为药品和食品中的重要功能成分。
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引用次数: 0
Comparative Genome-Wide Identification of the Fatty Acid Desaturase Gene Family in Tea and Oil Tea 茶叶和油茶中脂肪酸去饱和酶基因家族的全基因组比较鉴定
Pub Date : 2024-05-23 DOI: 10.3390/plants13111444
Ziqi Ye, Dan Mao, Yujian Wang, Hongda Deng, Xing Liu, Tongyue Zhang, Zhiqiang Han, Xingtan Zhang
Camellia oil is valuable as an edible oil and serves as a base material for a range of high-value products. Camellia plants of significant economic importance, such as Camellia sinensis and Camellia oleifera, have been classified into sect. Thea and sect. Oleifera, respectively. Fatty acid desaturases play a crucial role in catalyzing the formation of double bonds at specific positions of fatty acid chains, leading to the production of unsaturated fatty acids and contributing to lipid synthesis. Comparative genomics results have revealed that expanded gene families in oil tea are enriched in functions related to lipid, fatty acid, and seed processes. To explore the function of the FAD gene family, a total of 82 FAD genes were identified in tea and oil tea. Transcriptome data showed the differential expression of the FAD gene family in mature seeds of tea tree and oil tea tree. Furthermore, the structural analysis and clustering of FAD proteins provided insights for the further exploration of the function of the FAD gene family and its role in lipid synthesis. Overall, these findings shed light on the role of the FAD gene family in Camellia plants and their involvement in lipid metabolism, as well as provide a reference for understanding their function in oil synthesis.
山茶油是珍贵的食用油,也是一系列高价值产品的基础材料。具有重要经济价值的山茶属植物,如山茶(Camellia sinensis)和油茶(Camellia oleifera),被分为山茶科(sect.茶科和油茶科。油茶科。脂肪酸去饱和酶在催化脂肪酸链特定位置双键的形成方面发挥着重要作用,从而产生不饱和脂肪酸并促进脂质合成。比较基因组学结果显示,油茶中的扩展基因家族富含与脂质、脂肪酸和种子过程相关的功能。为了探索 FAD 基因家族的功能,我们在茶叶和油茶中鉴定了共 82 个 FAD 基因。转录组数据显示,FAD 基因家族在茶树和油茶成熟种子中的表达存在差异。此外,FAD 蛋白的结构分析和聚类为进一步探索 FAD 基因家族的功能及其在脂质合成中的作用提供了启示。总之,这些发现揭示了 FAD 基因家族在山茶植物中的作用及其在脂质代谢中的参与,并为了解其在油脂合成中的功能提供了参考。
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引用次数: 0
Drip Fertigation Enhances the Responses of Grain Yield and Quality to Nitrogen Topdressing Rate in Irrigated Winter Wheat in North China 滴灌提高华北灌溉冬小麦籽粒产量和品质对氮肥施用量的响应
Pub Date : 2024-05-22 DOI: 10.3390/plants13111439
Jin Tong, Yulei Xiong, Yu Lu, Wen Li, Wen Lin, Jianfu Xue, Min Sun, Yuechao Wang, Zhiqiang Gao
Conventional water and nitrogen (N) management practice in north China, comprising flood irrigation and N fertilizer broadcast (FB), limits sustainable wheat production. Drip fertigation (DF) has been widely adopted in wheat production in recent years and has effectively improved yields. However, the responses of the yield and quality to the N topdressing rate (NTR) under DF are still unclear. This study determined the responses of the wheat yield and quality to NTR under DF, as well as assessing whether DF could synergistically increase the yield and quality. A field experiment was conducted in north China for two seasons (2021–2023) using a split-plot design with three replicates. The main plot used the management practice (FB and DF) and the sub-plot had N treatment (no N applied, and NTRs of 0, 40, 80, 120, and 160 kg ha−1 with 150 kg N ha−1 as basal fertilizer, denoted as N0, T0, T40, T80, T120, and T160, respectively). Our results showed that high and saturated wheat yields (12.08 and 11.46 t ha−1) were obtained under DF at T80, and the highest yields were produced at T160 (11.71 and 11.30 t ha−1) under FB. Compared with FB, the greatest yield increase of 10.4–12.6% was achieved at T80 under DF. A higher spike number due to the increased effective stem percentage and a greater grain weight because of enhanced post-anthesis biomass production (BPpost) explained the improved yield under DF. The enhanced post-anthesis radiation use efficiency (RUE) led to the greater BPpost under DF. The enhanced specific leaf N, antioxidant capacity, and stomatal conductance under DF explained the higher light-saturated photosynthesis rate of flag leaves, which partly led to the increased post-anthesis RUE. NTR higher than 80 kg ha−1 did not enhance the yield, but it significantly improved the gliadin and glutelin contents, thereby leading to a higher total protein content, better gluten characteristics, and superior processing quality. Therefore, drip fertigation is a practical strategy for increasing both yield and quality with reduced water input and appropriate N input in irrigated winter wheat in north China. Applying 80 kg ha−1 of NTR under drip irrigation produces a high yield, but further gain in grain quality needs a higher NTR.
华北地区传统的水和氮肥(N)管理方法,包括大水漫灌和氮肥撒施(FB),限制了小麦的可持续生产。近年来,滴灌施肥(DF)在小麦生产中得到广泛应用,并有效提高了产量。然而,滴灌条件下小麦产量和品质对氮肥施用量(NTR)的响应尚不明确。本研究测定了 DF 条件下小麦产量和品质对氮肥上浇率的响应,并评估了 DF 是否能协同提高产量和品质。研究在华北地区进行了为期两季(2021-2023 年)的田间试验,采用三重复的分小区设计。主小区采用管理方法(FB 和 DF),副小区采用氮肥处理(不施氮肥,氮肥施用量为 0、40、80、120 和 160 kg ha-1,基肥为 150 kg N ha-1,分别称为 N0、T0、T40、T80、T120 和 T160)。结果表明,DF 在 T80 期获得了高产和饱和小麦产量(12.08 吨/公顷和 11.46 吨/公顷),FB 在 T160 期产量最高(11.71 吨/公顷和 11.30 吨/公顷)。与 FB 相比,DF 在 T80 产量增加最多,达到 10.4-12.6% 。有效茎率提高导致穗数增加,以及花后生物量产量(BPpost)增加导致粒重增加,是DF产量提高的原因。由于提高了花后辐射利用效率(RUE),DF 条件下的 BPpost 增加。DF 条件下叶片比 N、抗氧化能力和气孔导度的提高解释了旗叶较高的光饱和光合速率,这在一定程度上导致了花后辐射利用效率的提高。NTR 高于 80 kg ha-1 并没有提高产量,但却显著提高了谷胶蛋白和谷朊蛋白含量,从而提高了总蛋白含量,改善了面筋特性,提高了加工质量。因此,滴灌施肥是华北灌溉冬小麦在减少水分投入和适当氮投入的情况下提高产量和品质的一种实用策略。在滴灌条件下,每公顷施用 80 千克氮肥可获得高产,但要进一步提高谷物品质,则需要更高的氮肥施用量。
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引用次数: 0
Elaeocarpus sylvestris var. ellipticus Extract and Its Major Component, Geraniin, Inhibit Herpes Simplex Virus-1 Replication 鞣花提取物及其主要成分 Geraniin 可抑制单纯疱疹病毒-1 的复制
Pub Date : 2024-05-22 DOI: 10.3390/plants13111437
Yeong-Geun Lee, Dae Won Park, Jeong Eun Kwon, Hyunggun Kim, Se Chan Kang
Elaeocarpus sylvestris var. ellipticus (ES), which our research group had confirmed inhibits influenza A and SARS-CoV-2 viruses, was investigated to identify new potent and selective inhibitors of herpes simplex virus-1 (HSV–1) replication. To clarify the optimal condition for ES extract (ESE), ES was extracted at different concentrations of 0, 30, 50, 70, and 100%, to screen for its anti-HSV–1 effect. Among these ESE samples, ESE50 (50% concentration) exhibited the strongest inhibition of HSV–1 replication (EC50 23.2 μg/mL) while showing low cytotoxicity on host cells (IC50 342.8 μg/mL). The treatment of ESE50 clearly demonstrated a decrease in the expression of ICP0 in the lungs of HSV–1-infected BALB/c nude mice, compared to the MOCK group. Geraniin, which was isolated from ESE50 and analyzed using ESI−MS and 1D−(1H− and 13C−) and 2D−NMR, showed greater potency in inhibiting HSV–1 replication, as determined by the plaque reduction assay (EC50 8.3 μg/mL) and luciferase inhibition (EC50 36.9 μg/mL). The results demonstrate that ESE50 and geraniin show great potential as candidates for new drug discovery in the treatment of HSV–1 and related diseases.
我们的研究小组已证实鞣花提取物(ES)对甲型流感和 SARS-CoV-2 病毒有抑制作用,因此我们对其进行了研究,以确定新的强效选择性单纯疱疹病毒-1(HSV-1)复制抑制剂。为了明确 ES 提取物(ESE)的最佳条件,研究人员分别以 0、30、50、70 和 100% 的不同浓度提取 ES,以筛选其抗 HSV-1 的效果。在这些 ESE 样品中,ESE50(50% 浓度)对 HSV-1 复制的抑制作用最强(EC50 23.2 μg/mL),而对宿主细胞的细胞毒性较低(IC50 342.8 μg/mL)。与 MOCK 组相比,ESE50 可明显降低受 HSV-1 感染的 BALB/c 裸鼠肺中 ICP0 的表达。从 ESE50 中分离出的 Geraniin 利用 ESI-MS 和 1D-(1H- 和 13C-) 及 2D-NMR 进行了分析,通过斑块缩小试验(EC50 8.3 μg/mL)和荧光素酶抑制试验(EC50 36.9 μg/mL)确定,Geraniin 在抑制 HSV-1 复制方面表现出更强的效力。这些结果表明,ESE50 和龙葵素作为治疗 HSV-1 及相关疾病的新药候选物具有巨大的潜力。
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引用次数: 0
Biostimulant Response of Foliar Application of Rare Earth Elements on Physiology, Growth, and Yield of Rice 稀土元素叶面喷施对水稻生理、生长和产量的生物刺激响应
Pub Date : 2024-05-22 DOI: 10.3390/plants13111435
C. de Oliveira, S. Ramos, G. S. Dinali, T. D. de Carvalho, Fábio Aurélio Dias Martins, V. Faquin, Evaristo Mauro de Castro, Jorge Eduardo Souza Sarkis, José-Oswaldo Siqueira, Luiz Roberto Guimarães Guilherme
Rare earth elements (REEs) have been intentionally used in Chinese agriculture since the 1980s to improve crop yields. Around the world, REEs are also involuntarily applied to soils through phosphate fertilizers. These elements are known to alleviate damage in plants under abiotic stresses, yet there is no information on how these elements act in the physiology of plants. The REE mode of action falls within the scope of the hormesis effect, with low-dose stimulation and high-dose adverse reactions. This study aimed to verify how REEs affect rice plants’ physiology to test the threshold dose at which REEs could act as biostimulants in these plants. In experiment 1, 0.411 kg ha−1 (foliar application) of a mixture of REE (containing 41.38% Ce, 23.95% La, 13.58% Pr, and 4.32% Nd) was applied, as well as two products containing 41.38% Ce and 23.95% La separately. The characteristics of chlorophyll a fluorescence, gas exchanges, SPAD index, and biomass (pot conditions) were evaluated. For experiment 2, increasing rates of the REE mix (0, 0.1, 0.225, 0.5, and 1 kg ha−1) (field conditions) were used to study their effect on rice grain yield and nutrient concentration of rice leaves. Adding REEs to plants increased biomass production (23% with Ce, 31% with La, and 63% with REE Mix application) due to improved photosynthetic rate (8% with Ce, 15% with La, and 27% with REE mix), favored by the higher electronic flow (photosynthetic electron transport chain) (increase of 17%) and by the higher Fv/Fm (increase of 14%) and quantum yield of photosystem II (increase of 20% with Ce and La, and 29% with REE Mix), as well as by increased stomatal conductance (increase of 36%) and SPAD index (increase of 10% with Ce, 12% with La, and 15% with REE mix). Moreover, adding REEs potentiated the photosynthetic process by increasing rice leaves’ N, Mg, K, and Mn concentrations (24–46%). The dose for the higher rice grain yield (an increase of 113%) was estimated for the REE mix at 0.72 kg ha−1.
自 20 世纪 80 年代以来,稀土元素一直被有意用于中国农业,以提高作物产量。在世界各地,稀土元素也通过磷肥被有意识地施用到土壤中。众所周知,这些元素可减轻植物在非生物胁迫下受到的损害,但关于这些元素如何在植物生理机能中发挥作用,目前尚无任何资料。REE 的作用模式属于激素效应的范畴,具有低剂量刺激和高剂量不良反应的特点。本研究旨在验证稀土元素如何影响水稻植株的生理机能,以测试稀土元素在水稻植株中发挥生物刺激作用的阈值剂量。在实验 1 中,施用了 0.411 kg ha-1(叶面喷施)的 REE 混合物(含 41.38% Ce、23.95% La、13.58% Pr 和 4.32% Nd),以及分别含 41.38% Ce 和 23.95% La 的两种产品。对叶绿素 a 荧光、气体交换、SPAD 指数和生物量(盆栽条件)的特性进行了评估。在实验 2 中,研究人员增加了 REE 混合物的添加量(0、0.1、0.225、0.5 和 1 kg ha-1)(田间条件),以研究它们对水稻谷物产量和水稻叶片营养浓度的影响。由于光合速率的提高(Ce 为 8%、La 为 15%、REE 混合为 27%),向植物中添加 REE 增加了生物量产量(Ce 为 23%、La 为 31%、REE 混合为 63%)、更高的电子流(光合电子传递链)(增加 17%)、更高的 Fv/Fm(增加 14%)和光系统 II 的量子产率(使用 Ce 和 La 增加 20%,使用 REE Mix 增加 29%),以及更高的气孔导度(增加 36%)和 SPAD 指数(使用 Ce 增加 10%,使用 La 增加 12%,使用 REE Mix 增加 15%)。此外,添加 REEs 还能提高水稻叶片中氮、镁、钾和锰的浓度(24-46%),从而增强光合作用过程。据估计,REE 混合物的剂量为 0.72 kg ha-1,可提高水稻产量(增加 113%)。
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引用次数: 0
Plant Immunity: At the Crossroads of Pathogen Perception and Defense Response 植物免疫:处于病原体感知和防御反应的十字路口
Pub Date : 2024-05-22 DOI: 10.3390/plants13111434
S. Ali, A. Tyagi, Z. Mir
Plants are challenged by different microbial pathogens that affect their growth and productivity. However, to defend pathogen attack, plants use diverse immune responses, such as pattern-triggered immunity (PTI), effector-triggered immunity (ETI), RNA silencing and autophagy, which are intricate and regulated by diverse signaling cascades. Pattern-recognition receptors (PRRs) and nucleotide-binding leucine-rich repeat (NLR) receptors are the hallmarks of plant innate immunity because they can detect pathogen or related immunogenic signals and trigger series of immune signaling cascades at different cellular compartments. In plants, most commonly, PRRs are receptor-like kinases (RLKs) and receptor-like proteins (RLPs) that function as a first layer of inducible defense. In this review, we provide an update on how plants sense pathogens, microbe-associated molecular patterns (PAMPs or MAMPs), and effectors as a danger signals and activate different immune responses like PTI and ETI. Further, we discuss the role RNA silencing, autophagy, and systemic acquired resistance as a versatile host defense response against pathogens. We also discuss early biochemical signaling events such as calcium (Ca2+), reactive oxygen species (ROS), and hormones that trigger the activation of different plant immune responses. This review also highlights the impact of climate-driven environmental factors on host–pathogen interactions.
植物会受到不同微生物病原体的挑战,从而影响其生长和产量。然而,为了抵御病原体的侵袭,植物会使用多种免疫反应,如模式触发免疫(PTI)、效应触发免疫(ETI)、RNA 沉默和自噬等,这些免疫反应错综复杂,并受到不同信号级联的调控。模式识别受体(PRR)和核苷酸结合富亮氨酸重复(NLR)受体是植物先天免疫的标志,因为它们能检测病原体或相关免疫原性信号,并在不同细胞区触发一系列免疫信号级联。在植物中,最常见的 PRRs 是类受体激酶(RLKs)和类受体蛋白(RLPs),它们起着第一层诱导性防御的作用。在本综述中,我们将介绍植物如何感知作为危险信号的病原体、微生物相关分子模式(PAMPs 或 MAMPs)和效应物,并激活不同的免疫反应,如 PTI 和 ETI。此外,我们还讨论了 RNA 沉默、自噬和系统获得性抗性作为宿主对病原体的多功能防御反应的作用。我们还讨论了引发不同植物免疫反应激活的早期生化信号事件,如钙(Ca2+)、活性氧(ROS)和激素。本综述还强调了气候驱动的环境因素对宿主与病原体相互作用的影响。
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引用次数: 0
The Slow Growth of Adventitious Roots in Tetraploid Hybrid Poplar (Populus simonii × P. nigra var. italica) May Be Caused by Endogenous Hormone-Mediated Meristem Shortening 四倍体杂交杨树(Populus simonii × P. nigra var. italica)不定根生长缓慢可能是由内源激素介导的分生组织缩短引起的
Pub Date : 2024-05-22 DOI: 10.3390/plants13111430
Lixia Wu, Yuxin Ren, Xuefang Wang, Yuntong Zhang, Jun Wang
Polyploidization produces abundant phenotypic variation. Little is currently known about adventitious root (AR) development variation due to polyploidization. In this study, we analyzed the morphological, cytological, and physiological variations in AR development between tetraploid and diploid Populus plants during in vitro rooting culture. Compared to the diploids, the AR formation times and rooting rates of the tetraploids’ stem explants had non-significant changes. However, the tetraploid ARs exhibited significantly slower elongation growth than the diploid ARs. Cytological observation showed that the tetraploid ARs were characterized by shorter root meristems and reduced meristem cell numbers, suggesting the reasons for the slow AR elongation. Analysis of hormones and related metabolites during AR development demonstrated that the total auxin, cytokinin, and jasmonic acid contents were significantly lower in the tetraploid ARs than in those of the diploids, and that the ratio of total auxins to total CKs at 0 h of AR development was also lower in the tetraploids than in the diploids, whereas the total salicylic acid content of the tetraploids was consistently higher than that of the diploids. qPCR analysis showed that the expression levels of several hormone signaling and cell division-related genes in the tetraploid ARs significantly differed from those in the diploids. In conclusion, the slow elongation of the tetraploid ARs may be caused by the endogenous hormone-mediated meristem shortening. Our findings enhance the understanding of polyploidization-induced variation in AR development of forest trees.
多倍体化产生了丰富的表型变异。目前,人们对多倍体化导致的不定根(AR)发育变异知之甚少。本研究分析了四倍体杨树和二倍体杨树在离体生根培养过程中AR发育的形态学、细胞学和生理学差异。与二倍体相比,四倍体茎外植体的AR形成时间和生根率变化不大。然而,四倍体AR的伸长生长速度明显慢于二倍体AR。细胞学观察表明,四倍体AR的根分生组织较短,分生组织细胞数量减少,这说明了AR伸长缓慢的原因。对AR发育过程中激素和相关代谢物的分析表明,四倍体AR的总辅酶、细胞分裂素和茉莉酸含量明显低于二倍体,在AR发育0 h时,四倍体AR的总辅酶与总细胞分裂素的比值也低于二倍体,而四倍体AR的总水杨酸含量一直高于二倍体。qPCR 分析表明,四倍体 AR 中多个激素信号转导和细胞分裂相关基因的表达水平与二倍体有显著差异。总之,四倍体 AR 的缓慢伸长可能是由内源激素介导的分生组织缩短造成的。我们的发现加深了人们对多倍体化引起的林木AR发育变异的理解。
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引用次数: 0
In Vitro Approbation of Microbial Preparations to Shield Fruit Crops from Fire Blight: Physio-Biochemical Parameters 体外验证保护水果作物免受火疫病危害的微生物制剂:生理生化参数
Pub Date : 2024-05-22 DOI: 10.3390/plants13111431
A. Nurzhanova, A. Mamirova, V. Mursaliyeva, A. Nurmagambetova, Zhadyra Zhumasheva, Timur Turdiyev, Svetlana Kushnarenko, Elvira Ismailova
The need for the increasing geographical spread of fire blight (FB) affecting fruit crops to be addressed led to large-scale chemicalization of the environmental matrices and reduction of plant productivity. The current study aimed to assess the effects of novel biopreparations at different exposure durations on photosynthetic pigment content and antioxidant enzyme activity in leaves of apple and pear varieties with varying levels of resistance to FB. Biopreparations were formulated from a cultural broth containing Lacticaseibacillus paracasei M12 or Bacillus amyloliquefaciens MB40 isolated from apple trees’ phyllosphere. Aseptic leaves from blight-resistant (endemic Malus sieversii cv. KG10), moderately resistant (Pyrus pyraster cv. Wild), and susceptible (endangered Malus domestica cv. Aport and Pyrus communis cv. Shygys) varieties were employed. The impact of biopreparations on fruit crop antioxidant systems and photosynthetic apparatuses was investigated in vitro. Study results indicated that FB-resistant varieties exhibit enhanced adaptability and oxidative stress resistance compared to susceptible ones. Plant response to biopreparations varied based on the plant’s initial FB sensitivity and exposure duration. Indeed, biopreparations improved the adaptive response of the assimilation apparatus, protein synthesis, and catalase and superoxide dismutase activity in susceptible varieties, suggesting that biopreparations have the potential for future commercialization to manage FB in fruit crops.
为解决影响水果作物的火疫病(FB)在地理上日益蔓延的问题,需要对环境基质进行大规模化学处理,从而降低植物的生产力。目前的研究旨在评估新型生物制剂在不同暴露持续时间下对苹果和梨品种叶片光合色素含量和抗氧化酶活性的影响,这些品种对 FB 具有不同程度的抗性。生物制剂是由从苹果树叶球中分离出来的含有副乳酸杆菌 M12 或淀粉芽孢杆菌 MB40 的培养液配制而成的。使用的无菌叶片来自抗枯萎病品种(特有的 Malus sieversii cv. KG10)、中度抗病品种(Pyrus pyraster cv. Wild)和易感病品种(濒危的 Malus domestica cv. Aport 和 Pyrus communis cv. Shygys)。体外研究了生物制剂对水果作物抗氧化系统和光合装置的影响。研究结果表明,与易感品种相比,抗 FB 品种表现出更强的适应性和抗氧化胁迫能力。植物对生物制剂的反应因植物最初对 FB 的敏感性和接触时间长短而异。事实上,生物制剂改善了易感品种同化装置的适应性反应、蛋白质合成以及过氧化氢酶和超氧化物歧化酶的活性,这表明生物制剂具有未来商业化的潜力,可用于管理水果作物中的FB。
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