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首页> 外文期刊>Journal of Food Legumes >Influence of field drought on yield, yield components and antioxidant defense system in reproductive tissues of tolerant and susceptible Chickpea {Cicer arietinum L.) cultivars
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Influence of field drought on yield, yield components and antioxidant defense system in reproductive tissues of tolerant and susceptible Chickpea {Cicer arietinum L.) cultivars

机译：田间干旱对耐性和易感鹰嘴豆（Cicer arietinum L.）品种生殖组织产量，产量构成和抗氧化防御系统的影响

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摘要

The objective of this study was to evaluate the role of the antioxidative defense system in imparting tolerance against drought-induced oxidative stress in seven chickpea comprising of two drought tolerant {desi - PDG 3 and PDG 4) and five drought susceptible (desi-PEG 1, GPF 2, PBG 5 and kabuli - L 550 and BG 1053) cultivars, when subjected to field drought stress. The study was conducted in reproductive tissues (podwall and seed) at 10, 20, 30 and 40 days after flowering (DAF) under irrigated and rainfed conditions. Drought susceptibility index (DSI) in the tolerant cultivars was comparatively lower than susceptible cultivars. Effect of water deficit conditions on plant growth led to decline in harvest index of all chickpea culitvars. However, intolerant cultivars decline in harvest index was lower. During early pod development, the activities of antioxidative enzymes SOD, CAT, GR, POX and APX were more and as development progressed towards maturity the activities declined. Drought resulted in an increase in H202 accumulation and lipid peroxidation at different reproductive developmental stages. Drought-tolerant cultivars have higher antioxidant enzymes activities as compared to that of susceptible cultivars resulting in maintenance of lower ll,02 content and lipid peroxidation and higher growth, yield and yield components under water stress condition. In developing pods, susceptible cultivars failed to modulate the activities of antioxidative enzymes according to the ROS under field drought.Poor capacity of the antioxidative defense system in reproductive tissues of susceptible cultivars seems to be partly responsible for reduced yield potential under drought stress. Moreover, the higher status of antioxidative enzymes in pod wall of tolerant cultivars might protect the developing seeds from deleterious effects of drought.
机译：这项研究的目的是评估抗氧化防御系统在赋予七种鹰嘴豆抗干旱诱导的氧化应激耐受性中的作用，七种鹰嘴豆由两种耐旱性（desi-PDG 3和PDG 4）和五种耐旱性（desi-PEG 1）组成，GPF 2，PBG 5和kabuli-L 550和BG 1053）品种，当遭受田间干旱胁迫时。该研究是在灌溉和雨养条件下于开花后10、20、30和40天（DAF）于生殖组织（荚果和种子）中进行的。耐性品种的干旱敏感性指数（DSI）相对低于易感品种。缺水条件对植物生长的影响导致所有鹰嘴豆栽培品种的收获指数下降。但是，不耐性品种的收获指数下降幅度较小。在豆荚早期发育过程中，抗氧化酶SOD，CAT，GR，POX和APX的活性较高，并且随着发育的成熟，其活性下降。在不同的生殖发育阶段，干旱导致H2O2积累和脂质过氧化增加。与易感品种相比，耐旱品种具有更高的抗氧化酶活性，导致在水分胁迫条件下维持较低的II，02含量和脂质过氧化作用以及较高的生长，产量和产量构成要素。在发育中的豆荚中，易感品种在田间干旱下无法根据ROS调节抗氧化酶的活性。易感品种的生殖组织中抗氧化防御系统的能力差似乎是干旱胁迫下单产潜力降低的部分原因。此外，耐性品种荚壁中较高的抗氧化酶状态可能保护正在发育的种子免受干旱的有害影响。

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