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首页> 外文期刊>Environmental Sustainability >Cross priming with drought improves heat-tolerance in chickpea (Cicer arietinum L.) by stimulating small heat shock proteins and antioxidative defense
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Cross priming with drought improves heat-tolerance in chickpea (Cicer arietinum L.) by stimulating small heat shock proteins and antioxidative defense

机译：启动和干旱提高了耐热鹰嘴豆(中投arietinum l .)通过刺激小热休克蛋白和抗氧化国防

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Abstract An expected rise in global temperature is an inevitable threat to crop productivity and may have serious concerns on food security. In northern India, winter-sown chickpea (Cicer arietinum L.) come across with abrupt high temperature during the terminal reproductive stage which leads to reduction in the production. Priming chickpea with mild drought at the seedling stage may induce tolerance to heat stress at a later stage. We analyzed 11?days old seedlings of two contrasting chickpea varieties (PBG1 and PBG5) primed with mild drought stress for 3?days, recovered for another 6?days, and finally exposed to different levels of heat stress (30?°C, 32?°C, 34?°C, and 36?°C) for 12?h. Both damage and defense parameters were analyzed at different stages i.e. before and after priming and finally after exposure to varying degrees of stress. Our study revealed that priming improved membrane integrity by reducing percent electrolyte leakage and lipid peroxidation up to 34?°C, whereas mitochondrial efficiency (2,3,5-triphenyl tetrazolium chloride (TTC) reduction) could not be influenced. Superoxide dismutase, catalase and ascorbate peroxidase activity increased proportionately with the increase in temperature (up to 34?°C only). Later, activity declined at higher temperatures. Changes in the expression level of Small Heat Shock Proteins (sHSP18.5 and 22.7) were also established by RT-PCR. Primed plants showed increased expression of sHSP at 36?°C. Overall, priming with drought reduced the membrane damage and increased antioxidative enzymes, also modulated expression of sHSP18.5 and 22.7; thus, improved the heat tolerance up to 34?°C. This study has highlighted the role of drought priming in the acclimation to heat stress and corroboration of antioxidative enzymes and sHSP’s.
机译：抽象的预期,全球温度上升不可避免的对作物生产力和可能的威胁食品安全存在严重的关切。印度北部,冬天播种的鹰嘴豆(中投arietinum l .)遇到突然的高温度在终端生殖导致减少在生产阶段。启动与轻度干旱的鹰嘴豆苗期诱导热压力在稍后的阶段。幼苗的两个对比鹰嘴豆品种(PBG1和PBG5)轻度干旱胁迫3吗?最后暴露于不同水平的热量压力(30 ?国防和损伤参数进行了分析在不同的阶段即启动之前和之后最后在暴露于不同程度的压力。膜完整性通过减少百分比电解质渗漏和脂质过氧化作用34吗?(2、3、5-triphenyl四唑氯(TTC)减少)不能影响。岐化酶、过氧化氢酶和抗坏血酸盐过氧化物酶活动与成比例地增加增加温度(34吗?活动后,拒绝在更高的温度。小热的表达水平的变化休克蛋白质(sHSP18.5和22.7)也建立的rt - pcr。增加表达sHSP 36 ?°C。启动与干旱降低了膜的破坏和增加抗氧化酵素调制sHSP18.5和22.7的表达式;提高了耐热性34 ?°C。研究了干旱的作用启动适应环境的压力和热量抗氧化的酶和确证sHSP .吗

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