Scientia Horticulturae最新文献_第3页

Conservation of wild Solanum germplasm based on seed cryopreservation and slow growth conservation 基于种子低温保存和慢生长保护的野生茄属植物种质资源保护

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-02-01 DOI: 10.1016/j.scienta.2026.114648

Jinhui Mo , Shuncheng Zhang , Jvhao Wang , Xiao Peng , Jinli Lv , Xinyu Zhang , Xiuhong Xu , Jingwei Li , Wanping Zhang

The wild Solanum resources are a key part of Yunnan’s plant genetic diversity, and some of these resources are traditional vegetables for the local Dai and Hani ethnic minorities. However, their genetic diversity has been declining due to rapid urbanization, making conservation urgent. To establish a scientific preservation system, this study selected 15 wild Solanum germplasm resources collected from Dai and Hani-inhabited areas in Yunnan. For 9 cryo-tolerant genotypes, 8%–10% seed moisture content was optimal; preservation duration had negligible effects within the appropriate seed moisture content range, while germplasm traits significantly impacted seed survival and regeneration. Plantlets regenerated from these preserved seeds maintained stable morphological and physiological traits, and the stability of their DNA structures was further verified using 6 primers of ISSR and RAPD markers. A medium-term slow growth conservation system, which was based on the induction of adventitious buds through the cotyledon organogenesis pathway, was developed for 6 cryo-sensitive materials. The medium “MS + 30 g/L sucrose + 7 g/L agar + 2.0 mg/L ZT + 0.1–0.2 mg/L NAA (pH=5.8)” had the highest adventitious bud induction efficiency; “1/4 MS + 60 g/L sucrose + 9 g/L agar + 75–100 mg/L CCC + 0.1 mg/L ABA (pH=5.8)” retarded stem elongation while ensuring survival. Recovered plantlets only had lower root biomass than controls, with no other obvious variation in traits or DNA. This study not only provides technical support for the stable preservation of S. undatum and its relatives but also lays a foundation for safeguarding ethnic vegetable genetic resources and promoting sustainable development of Solanaceae breeding and biodiversity conservation.

野生龙葵资源是云南植物遗传多样性的重要组成部分，其中一些资源是当地傣族和哈尼族的传统蔬菜。然而，由于快速的城市化，其遗传多样性正在下降，保护迫在眉睫。为了建立科学的保存体系，本研究选取了云南傣族和哈尼族聚居区15种野生茄属植物种质资源。9个耐低温基因型的种子含水率为8% ~ 10%；在适当的种子含水量范围内，保存时间对种子的影响可以忽略不计，而种质性状对种子的存活和再生有显著影响。利用6条ISSR和RAPD标记的引物进一步验证了其DNA结构的稳定性。以6种低温敏感材料为材料，建立了通过子叶器官发生途径诱导不定芽的中期慢生长保护体系。培养基“MS + 30 g/L蔗糖+ 7 g/L琼脂+ 2.0 mg/L ZT + 0.1 ~ 0.2 mg/L NAA （pH=5.8）”的不定芽诱导效率最高；“1/4 MS + 60 g/L蔗糖+ 9 g/L琼脂+ 75-100 mg/L CCC + 0.1 mg/L ABA （pH=5.8）”在保证存活的同时延缓了茎伸长。恢复植株只有根系生物量低于对照，在性状和DNA方面没有其他明显的变化。本研究不仅为龙葵及其近缘种的稳定保存提供了技术支持，而且为保护民族蔬菜遗传资源，促进龙葵科育种和生物多样性保护的可持续发展奠定了基础。

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引用次数: 0

Hydrogen sulfide signaling fortifies lavender: Antioxidant defense, phytochemical modulation, and genetic responses under salt and drought stress 硫化氢信号强化薰衣草：抗氧化防御，植物化学调节和盐和干旱胁迫下的遗传反应

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-02-01 DOI: 10.1016/j.scienta.2026.114632

Elhameh Daneshvand , Fatemeh Rahmani , Naser Abbaspour , Amir Rahimi

Abiotic stresses, particularly salinity and drought, severely constrain plant growth and productivity by disrupting key physiological and biochemical processes. In recent years, hydrogen sulfide (H₂S) has emerged as a signaling molecule with promising roles in mitigating environmental challenges. This study investigated the effects of exogenous H₂S, applied as sodium hydrosulfide (NaHS) at 100 and 200 μM, on antioxidant defenses, phytochemical traits, essential oil composition, and gene expression in Lavandula angustifolia. Plants were subjected to salt stress (0, 150, and 300 mM NaCl) and drought stress (100, 50, and 25% field capacity, FC) for 7 and 14 days. Results demonstrated that NaCl (300 mM) combined with NaHS (200 μM) significantly enhanced phytochemical accumulation, with chlorogenic acid, rutin, and cinnamic acid increasing by 86%, 11%, and 33%, respectively. Essential oil constituents, such as alpha-pinene, 1,8-cineole, and camphor, also increased by 11–25% compared to untreated controls. Gene expression analysis revealed that CINs and LIMs were upregulated by 78% and 110% under NaCl (150 mM) + NaHS (200 μM), whereas LINs expression declined by 33%. Under drought stress, NaHS application at 25% FC reduced the expression of phenolics, flavonoids, FRAP, rutin, coumaric acid, and LINs by 12–67%. Conversely, notable increases were observed in secondary metabolites, including gallic acid (444%), chlorogenic acid (603%), and rosmarinic acid (205%), alongside elevated CINs (73%) and LIMs expression (55%). Overall, these findings highlight the dual role of H₂S in enhancing stress tolerance and stimulating secondary metabolite production in lavender, offering new insights into its potential as a stress-mitigating agent.

非生物胁迫，特别是盐度和干旱，通过破坏关键的生理和生化过程，严重限制了植物的生长和生产力。近年来，硫化氢（H₂S）已成为一种信号分子，在缓解环境挑战方面发挥着重要作用。研究了100 μM和200 μM外源氢硫化钠（NaHS）对薰衣草抗氧化防御、植物化学性状、精油成分和基因表达的影响。分别处理盐胁迫（0、150和300 mM NaCl）和干旱胁迫（100、50和25%田间容量，FC） 7和14 d。结果表明，NaCl （300 mM）与NaHS （200 μM）复合处理显著促进了植物化学物质的积累，绿原酸、芦丁和肉桂酸分别增加了86%、11%和33%。精油成分，如α -蒎烯、1,8-桉树脑和樟脑，也比未治疗的对照组增加了11-25%。基因表达分析显示，在NaCl (150 mM) + NaHS （200 μM）处理下，CINs和LIMs的表达分别上调了78%和110%，而LINs的表达则下降了33%。在干旱胁迫下，施用25% FC的NaHS使酚类物质、类黄酮、FRAP、芦丁、香豆酸和LINs的表达减少了12-67%。相反，次要代谢物，包括没食子酸（444%）、绿原酸（603%）和迷迭香酸（205%），以及CINs（73%）和LIMs表达（55%）显著增加。总的来说，这些发现突出了H₂S在增强薰衣草耐受性和刺激次生代谢物产生方面的双重作用，为其作为应激缓解剂的潜力提供了新的见解。

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引用次数: 0

Sodium nitroprusside reduces chilling injury in hami melons by regulating postharvest proline metabolism and energy metabolism 硝普钠通过调节哈密瓜采后脯氨酸代谢和能量代谢来减少冷害

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-02-01 DOI: 10.1016/j.scienta.2026.114651

Meihui Jia, Xiaobing Wang, Manman Zhang, Qian Liu, Zhongchuan Gao, Xiaojie Chen, Haixin Chen, Zonghao Zhang, Jing Wang

This experiment examined the effects of sodium nitroprusside (SNP; 1.0 mmol/L) versus a control (0 mmol/L) on proline and energy metabolism in cantaloupe during low-temperature storage.As storage time increased, SNP treatment during the late storage period (28–42 d) reduced the chilling injury index and rate in Hami melon fruits. SNP increased free proline content, significantly raised P5CS and OAT activities (p < 0.05), and inhibited ProDH activity and production (p < 0.05). It delayed the decline of ATP and ADP and significantly increased H⁺-ATPase activity (p < 0.05). During mid-storage (21–35 d), SNP slowed Ca²⁺-ATPase activity decline (p < 0.05), maintained higher EC levels, inhibited AMP content, increased SDH activity, and promoted expression of CmP5CS, CmOAT, CmH⁺-ATPase, CmCa²⁺-ATPase, CmSDH, and CmCCO genes (p < 0.05). Overall, SNP treatment enhances Hami melon cold resistance by regulating osmoregulatory substances and energy metabolism, providing a theoreticalbasis for controlling chilling injury in Hami melon.

本试验研究了硝普钠（SNP; 1.0 mmol/L）与对照（0 mmol/L）对哈密瓜低温贮藏期间脯氨酸和能量代谢的影响。随着贮藏时间的延长，贮藏后期（28 ~ 42 d） SNP处理降低了哈密瓜果实冷害指数和发生率。SNP增加了游离脯氨酸含量，显著提高了P5CS和OAT活性（p < 0.05），抑制了ProDH活性和生成（p < 0.05）。延缓了ATP和ADP的下降，显著提高了H + -ATP酶活性（p < 0.05）。在贮藏中期（21 ~ 35 d）， SNP减缓了Ca 2 + -ATPase活性的下降（p < 0.05），保持了较高的EC水平，抑制了AMP含量，增加了SDH活性，促进了CmP5CS、CmOAT、CmH + -ATPase、CmCa 2 + -ATPase、CmSDH和CmCCO基因的表达（p < 0.05）。综上所述，SNP处理通过调节渗透调节物质和能量代谢增强哈密瓜抗寒性，为控制哈密瓜冷害提供了理论依据。

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引用次数: 0

Deciphering phosphorus acquisition and partitioning in potato: Root architecture, physio-biochemical adaptations, and tuber quality modulated by carbon quantum dots 解读马铃薯磷的获取和分配：碳量子点调控的根结构、生理生化适应和块茎质量

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-02-01 DOI: 10.1016/j.scienta.2026.114645

Muhammad Amir Shahzad , Nadia Bibi , Xiaoting Fang , Xiangquan Fan , Xueli Huang , Kaiqin Zhang , Xia Zhu , Sadia Bashir , Zhitong Ren , Shunlin Zheng

Phosphorus (P) fertilization is essential for sustaining global food security, yet its excessive use leads to economic losses and environmental concerns, necessitating alternative strategies to improve phosphorus-use efficiency (PUE). We hypothesized that nitrogen doped carbon quantum dots (NCQDs) act as a nanoscale facilitator to mitigate P deficiency and enhance P utilization, thereby maintaining metabolic stability in potato (Solanum tuberosum L.). Plants were grown under low, medium, and high P regimes combined with NCQDs concentrations (0, 0.18, 0.36, 0.54, and 0.72 g l^-1). Under medium P, NCQDs application significantly improved growth, photosynthesis, and biochemical dynamics. Biomass accumulation in leaves, stems and roots increased by 16–29%, while root length, surface area, diameter, and volume were enhanced by 9–21%. Photosynthetic rate, stomatal conductance, and transpiration improved by 33%, 12%, and 14%, respectively, alongside a 10% decline in intercellular CO₂. Chlorophyll fluorescence and SPAD values were enhanced by 6–20% and 8%. Biochemical analysis revealed similar gains; tuber starch, ATP, and protein content increased by 17–38%, whereas proline and phenolics/flavonoids decreased by 18–23%. Consequently, nutrient partitioning analysis revealed that medium P with 0.36g l^-1 NCQDs achieved the highest leaf P concentration (31–56%) and P uptake efficiency (22%) over the low P control. Correlation and PCA analyses confirmed strong associations among P acquisition, root architecture, photosynthesis, and yield. Overall, NCQDs demonstrated a sustainable nano-enabled approach to boost crop productivity under limited phosphorus conditions. Future multi-omics studies will elucidate the molecular networks and regulatory genes involved in P metabolism, providing novel insights for root architecture and PUE.

磷肥对维持全球粮食安全至关重要，但其过度使用会导致经济损失和环境问题，因此需要采取其他战略来提高磷的利用效率。我们假设氮掺杂碳量子点（NCQDs）作为纳米级促进剂缓解磷缺乏和提高磷利用，从而维持马铃薯（Solanum tuberosum L.）的代谢稳定性。植物在低、中、高磷和NCQDs浓度（0、0.18、0.36、0.54和0.72 g -1）下生长。在中磷条件下，NCQDs显著改善了玉米的生长、光合和生化动力学。叶片、茎和根的生物量积累增加了16-29%，根长、表面积、直径和体积增加了9-21%。光合速率、气孔导度和蒸腾作用分别提高了33%、12%和14%，同时细胞间二氧化碳含量下降了10%。叶绿素荧光和SPAD值分别提高6-20%和8%。生化分析显示了类似的收获；淀粉、ATP和蛋白质含量增加了17-38%，脯氨酸和酚类/类黄酮含量减少了18-23%。因此，养分分配分析表明，与低磷对照相比，添加0.36g l-1 NCQDs的中磷处理叶片磷浓度最高（31-56%），磷吸收效率最高（22%）。相关分析和主成分分析证实，磷的获取与根构型、光合作用和产量之间存在较强的相关性。总的来说，NCQDs展示了一种可持续的纳米方法，可以在磷有限的条件下提高作物产量。未来的多组学研究将阐明参与P代谢的分子网络和调控基因，为根构型和PUE提供新的见解。

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引用次数: 0

NAC transcription factors regulate Ca2+ -dependent and Zn2+ -dependent nucleases to cooperatively participate in nuclear DNA degradation during programmed cell death in secretory cavity cells of Citrus fruits NAC转录因子调控Ca2+依赖性和Zn2+依赖性核酸酶协同参与柑橘类水果分泌腔细胞程序性死亡过程中的核DNA降解

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-02-01 DOI: 10.1016/j.scienta.2026.114642

Minjian Liang , Bin Huai , Junjun Lin , Hanjun He , Mei Bai , Hong Wu

Plant transcription factors play a crucial role in plant growth, development, and stress resistance. Among them, the NAC transcription factor family is involved in the process of programmed cell death (PCD) during plant growth and development.

PCD is involved in the development process of the secretory cavities in the fruit of Citrus reticulata ‘Chachiensis’. During PCD in secretory cavity cells, Ca²⁺ -dependent and Zn²⁺ -dependent nucleases collaboratively participate in the degradation of the cell nucleus. However, there are still few studies on the transcription factors that regulate the synergistic action of these two types of nucleases in secretory cavity cells PCD. Therefore, this study investigated the transcription factors involved in the regulation of the synergistic action of Ca²⁺-dependent and Zn²⁺-dependent nucleases which participate in nuclear degradation during the development of secretory cavities in Citrus reticulata ‘Chachiensis’ fruits. In this study, three NAC transcription factors CrNAC2, CrNAC87-like and CrNAC100, were obtained and identified. We found that CrNAC2 had a specific expression peak in the middle initial cell stage of the secretory cavity development. While CrNAC87-like and CrNAC100 were mainly specifically expressed in the late initial cell stage and the lumen-forming stage of the secretory cavity development. These results indicated that three transcription factors were involved in the forming of secretory cavity. Through yeast one-hybrid and dual-luciferase assays, it was found that CrNAC2 negatively regulated the expression of Ca²⁺ -dependent nuclease CrCAN, whereas CrNAC87-like and CrNAC100 positively regulated the expression of Zn²⁺ -dependent nuclease CrENDO1. Therefore, we hypothesize that during the development of secretory cavities in Citrus fruits, CrNAC2 negatively regulates the Ca²⁺-dependent nuclease, which mediates limited fragmentation of nuclear DNA in the middle initial cell stage. Subsequently, during the late initial cell stage and the lumen-forming stage, CrNAC87-like and CrNAC100 positively regulate the Zn²⁺-dependent nuclease to completely degrade the nuclear DNA. This study provides additional experimental data for understanding the regulation of nucleases by NAC transcription factors in plant programmed cell death.

植物转录因子在植物生长发育和抗逆性中起着至关重要的作用。其中，NAC转录因子家族参与植物生长发育过程中的程序性细胞死亡（PCD）过程。PCD参与了柑桔（Citrus reticulata ' Chachiensis）果实分泌腔的发育过程。在分泌腔细胞的PCD过程中，Ca2+依赖性和Zn2+依赖性核酸酶协同参与细胞核的降解。然而，在分泌腔细胞PCD中调控这两类核酸酶协同作用的转录因子的研究还很少。因此，本研究研究了在柑橘（Citrus reticulata ' Chachiensis）果实分泌腔发育过程中参与核降解的Ca +依赖和Zn +依赖核酸酶协同作用调控的转录因子。本研究获得并鉴定了三个NAC转录因子CrNAC2、CrNAC87-like和CrNAC100。我们发现CrNAC2在分泌腔发育的初始细胞中期有一个特异性表达高峰。而CrNAC87-like和CrNAC100主要在分泌腔发育的初始细胞晚期和管腔形成阶段特异性表达。这些结果表明，三种转录因子参与了分泌腔的形成。通过酵母单杂交和双荧光素酶实验，发现CrNAC2负调控Ca2+依赖性核酸酶CrCAN的表达，而CrNAC87-like和CrNAC100正调控Zn2+依赖性核酸酶CrENDO1的表达。因此，我们假设在柑橘类水果的分泌腔发育过程中，CrNAC2负调控ca2 +依赖的核酸酶，该酶在细胞初始中期介导细胞核DNA的有限断裂。随后，在初始细胞后期和管腔形成阶段，CrNAC87-like和CrNAC100正调控Zn 2⁺依赖的核酸酶，完全降解核DNA。本研究为了解NAC转录因子对植物程序性细胞死亡中核酸酶的调控提供了额外的实验数据。

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引用次数: 0

Morpho-physiological and phytochemical responses of three Thymus species with different drought resistance 三种不同抗旱性胸腺草的形态生理和植物化学响应

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-02-01 DOI: 10.1016/j.scienta.2026.114625

Maryam Alipour, Maryam Haghighi, Mehdi Rahimmalek

Drought stress is one of the major environmental constraints on the productivity and quality of aromatic and medicinal plants. The purpose of this study was to compare the morphological, physiological, biochemical, and phenolic responses of three Thymus species (T. serpyllum, T. vulgaris, and T. kotschyanus) to different irrigation regimes: 100%, 70%, and 40% of field capacity. The results revealed species-specific differences in drought tolerance. T. kotschyanus exhibited the highest drought resistance, maintaining greater relative water content and biomass under stress, while T. serpyllum showed the most significant decreases. Proline accumulation increased linearly with drought severity in all species, indicating osmotic adjustment under drought stress. T. vulgaris had lower chlorophyll and carotenoid contents, whereas T. kotschyanus had higher levels under severe drought. Total phenolic and flavonoid contents increased significantly in all species. T. kotschyanus had the highest essential oil percentage under severe drought, indicating the potential for drought-adapted essential oil production. HPLC profiling identified rosmarinic acid as the dominant phenolic compound, particularly in T. kotschyanus, where its content increased by 47% under stress. Overall, the findings show that Thymus species have distinct adaptive mechanisms, with T. kotschyanus exhibiting superior drought tolerance and phytochemical resilience, making it a promising candidate for cultivation in arid and semi-arid regions.

干旱胁迫是影响芳香和药用植物产量和品质的主要环境因素之一。本研究的目的是比较三种胸腺（T. serpyllum， T. vulgaris和T. kotschyanus）对100%、70%和40%农田灌溉能力的形态、生理、生化和酚类反应。结果显示，不同物种的耐旱性存在差异。干旱胁迫下，黄颡鱼（T. kotschyanus）表现出最高的抗旱性，相对含水量和生物量在逆境下保持较高的水平，而丝虫草（T. serpyllum）的抗旱性下降最为显著。脯氨酸积累量随干旱严重程度线性增加，表明干旱胁迫下渗透调节。在严重干旱条件下，柽柳叶绿素和类胡萝卜素含量较低，而柽柳叶绿素和类胡萝卜素含量较高。总酚和类黄酮含量均显著增加。在严重干旱条件下，黄颡鱼挥发油含量最高，表明黄颡鱼具有适应干旱的挥发油生产潜力。高效液相色谱法鉴定迷迭香酸是主要的酚类化合物，特别是在黄颡鱼中，其含量在胁迫下增加了47%。综上所述，研究结果表明，胸腺属植物具有不同的适应机制，其中胸腺属植物具有较强的抗旱性和植物化学恢复能力，是干旱和半干旱地区种植胸腺属植物的理想选择。

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引用次数: 0

Identification and biological characteristics of Colletotrichum species combined with cultivar response analysis unravel grape ripe rot resistance mechanisms 炭疽病菌的鉴定、生物学特性及品种反应分析揭示了葡萄抗成熟腐病的机理

IF 4.3 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-01-31 DOI: 10.1016/j.scienta.2026.114653

Shiping Mei, Runlong Zheng, Wenteng Sun, Tingting Kang, Xiaofeng Shang, Yu Hao, Yan Xu, Wen Zhang, Guotian Liu

引用次数: 0

Corrigendum to “Aluminum stress alters leaf physiology and endophytic bacterial communities in ginseng (Panax ginseng Meyer)” [Scientia Horticulturae, Volume 350, August 2025, 114276] “铝胁迫改变人参（Panax ginseng Meyer）的叶片生理和内生细菌群落”的勘误[科学园艺，卷350，August 2025, 114276]

IF 4.3 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-01-25 DOI: 10.1016/j.scienta.2026.114636

Chijia Liang, Fan Zhou, Guanzhong Ding, Peng Mu, Yue Zhang, Ning Liu

引用次数: 0

Gallic acid as a phytostimulant enhances the yield and fruit nutrient profile of greenhouse-grown cucumber under mulching, deficit- and well-watered conditions 没食子酸作为一种植物兴奋剂，在覆盖、亏缺和水分充足的条件下提高了温室黄瓜的产量和果实营养成分

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-01-24 DOI: 10.1016/j.scienta.2025.114479

Fahad Kimera , Muziri Mugwanya , Hani Sewilam

Water stress is a major factor hindering horticulture production in marginal areas. Applying phytostimulants combined with deficit drip irrigation and mulching could present benefits to improve the yield and quality of cultivated crops. This study investigated the impact of foliar application of different concentrations of gallic acid (T1: control [deionized water], T2: 100 µM, T3: 200 µM, T4: 300 µM, T5: 400 µM, and T6: 500 µM) to mulched and non-mulched cucumber crops under deficit (50 % field capacity [FC]) and well-watered (100 % FC) conditions. The study results indicated that severe water stress (50 % FC) negatively impacted the plant heights, leaf area, leaf area index, chlorophyll content (SPAD), and yield of cucumber, especially under the non-mulched treatments. However, mulching significantly improved the fruit yield by 74.59 %, 64.63 %, and 60.88 % in T6, T5, and T4, respectively, compared to T1 at 50 % FC. Nonetheless, deficit drip irrigation improved the water productivity by 54.66 % and 48.88 % in mulched and non-mulched treatments, respectively. For fruit nutrient composition, gallic acid treatments improved the nutrient composition of fruits in deficit and well-watered conditions, irrespective of mulching or non-mulching conditions. Based on these results, this study recommends foliar application of gallic acid at a concentration of 300 µM under mulched and deficit irrigation (50 % FC) conditions due to its superior effect on yield, water productivity, and fruit nutrient composition.

水分胁迫是阻碍边缘地区园艺生产的主要因素。施用植物兴奋剂与亏缺滴灌和覆盖相结合，有利于提高栽培作物的产量和品质。本研究研究了不同浓度的没食子酸（T1：对照[去离子水]、T2: 100µM、T3: 200µM、T4: 300µM、T5: 400µM和T6: 500µM）在亏缺（50%田容量[FC]）和水分充足（100% FC）条件下对覆盖和未覆盖黄瓜作物的影响。研究结果表明，重度水分胁迫（50% FC）对黄瓜株高、叶面积、叶面积指数、叶绿素含量（SPAD）和产量均有显著的负向影响，特别是在不覆盖处理下。但在50% FC条件下，与T1相比，覆盖在T6、T5和T4的产量分别显著提高了74.59%、64.63%和60.88%。亏缺滴灌在覆盖和不覆盖处理下，水分生产力分别提高了54.66%和48.88%。在果实营养成分方面，无论覆盖或不覆盖，没食子酸处理均改善了亏缺和丰水条件下果实的营养成分。基于这些结果，本研究建议在覆盖和亏缺灌溉（50% FC）条件下叶面施用浓度为300µM的没食子酸，因为它对产量、水分生产力和果实营养成分有更好的影响。

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引用次数: 0

Drought tolerance assessment of carrot genotypes: A morphological and physiological approach 胡萝卜基因型的耐旱性评价：形态学和生理学方法

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae

Pub Date : 2026-01-24 DOI: 10.1016/j.scienta.2026.114637

Md. Faruk Hossain , Md. Harun Ar Rashid , Md. Abdur Rahim , Md. Golam Rabbani

Drought tolerance is a critical focus in crop improvement, particularly in carrots (Daucus carota L.), a globally significant vegetable. One approach to addressing this issue is to develop varieties that are tolerant to drought stress. The research was conducted in two locations in Bangladesh, farmer fields of the Teesta River lands, Kaunia region of the Rangpur district and the Horticulture Farm, Bangladesh Agricultural University, Mymensingh-2202 from November 2022 to February 2023, with varying soil and climatic conditions. The experiment was laid out in a Split Plot Design with two replications. This study aims to assess the drought tolerance of carrot genotypes, incorporating both morphological and physiological traits to evaluate their performance under drought stress. Drought stress was imposed during the critical taproot development stage. Results indicated significant genotype-dependent variability in response to drought. Genotypes G22 (PI 419042), G24 (PI 419184) and G16 (PI 264669) consistently exhibited superior drought tolerance with high marketable root yield, maintaining higher relative water content, proline accumulation and chlorophyll content, contributing to their resilience. Root traits, such as root length and diameter, and root fresh weight were positively correlated with yield under both control and drought conditions. According to the wilting severity scale G22 (PI 419042), G24 (PI 419184) and G16 (PI 264669) were the most drought-stress tolerant. The biplot analysis, based on the Multi-trait genotype-ideotype distance index (MGIDI), highlighted genotypes G22 (PI 419042), G24 (PI 419184) and G16 (PI 264669) as the top performers due to their desirable trait combinations. This research provides valuable insights into the genetic variability of drought tolerance in carrots, aiding the development of resilient cultivars for drought-prone environments.

耐旱性是作物改良的关键焦点，特别是胡萝卜（Daucus carota L.），一种全球重要的蔬菜。解决这一问题的一种方法是开发耐干旱胁迫的品种。该研究于2022年11月至2023年2月在孟加拉国的两个地点进行，分别是Rangpur地区Kaunia地区Teesta河土地的农民田地和孟加拉国农业大学Mymensingh-2202的园艺农场，土壤和气候条件各不相同。试验采用裂区设计，两个重复。本研究旨在从形态和生理两方面评价胡萝卜基因型在干旱胁迫下的抗旱性。干旱胁迫发生在主根发育关键期。结果表明，在对干旱的响应中存在显著的基因型依赖性变异。基因型G22 （PI 419042）、G24 （PI 419184）和G16 （PI 264669）均表现出较强的抗旱性，具有较高的可销根产量，保持较高的相对含水量、脯氨酸积累和叶绿素含量，有利于其抗旱性。在对照和干旱条件下，根长、根径、根鲜重等根系性状与产量均呈正相关。根据萎蔫程度评分，G22 （PI 419042）、G24 （PI 419184）和G16 （PI 264669）的抗旱能力最强。基于多性状基因型-理想型距离指数（MGIDI）的双图分析显示，基因型G22 （PI 419042）、G24 （PI 419184）和G16 （PI 264669）因其理想的性状组合而表现最佳。这项研究为胡萝卜耐旱性的遗传变异提供了有价值的见解，有助于在干旱易发环境中开发具有抗旱性的品种。

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引用次数: 0