Night-Warming Priming at the Vegetative Stage Alleviates Damage to the Flag Leaf Caused by Post-anthesis Warming in Winter Wheat (Triticum aestivum L.).
Night-Warming Priming at the Vegetative Stage Alleviates Damage to the Flag Leaf Caused by Post-anthesis Warming in Winter Wheat (Triticum aestivum L.).
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DOI：
10.3389/fpls.2021.706567
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发表时间：
2021
影响因子：
5.6
通讯作者：
Huang Z
中科院分区：
文献类型：
--
作者：
Fan Y;Lv Z;Ge T;Li Y;Yang W;Zhang W;Ma S;Dai T;Huang Z
气温日变化和季节变化的非对称性增温对作物分布和生产力有重要影响。冬小麦生育前期的不对称增温对其营养生长和花后籽粒生产力产生了深远的影响。以冬小麦为试材，研究了冬小麦灌浆期夜暖处理(灌浆期增温处理)和春暖化处理(春暖化处理)对旗叶衰老和产量的影响。结果表明，FT通过降低每穗粒数和千粒重来降低小麦产量，且FT处理的小麦植株产量下降幅度大于WT+FT和ST+FT处理。WT+FT和ST+FT处理小麦旗叶的净光合速率、叶绿素含量和叶绿素荧光参数在开花后0~7d均高于对照，但在开花后14~28d低于对照，高于单独处理。灌浆初期，WT+FT和ST+FT处理小麦旗叶中的可溶性蛋白质和Rubisco含量较高，然后逐渐下降到低于对照的水平。在0~14d，WT+FT处理的小麦植株中这些物质的含量高于ST+FT处理的小麦植株，而在21d~28d的处理中，则相反。灌浆前期，WT+FT和ST+FT通过提高超氧化物歧化酶和过氧化物酶活性，降低磷脂酶D(PLD)、磷脂酸(PA)、脂氧合酶(LOX)和游离脂肪酸水平来抑制膜脂过氧化，但在灌浆后期其抑制膜脂过氧化作用逐渐减弱。增夜引发通过延缓旗叶花后衰老，缓解了花后增温对产量的不利影响。
The asymmetric warming in diurnal and seasonal temperature patterns plays an important role in crop distribution and productivity. Asymmetric warming during the early growth periods of winter wheat profoundly affects its vegetative growth and post-anthesis grain productivity. Field experiments were conducted on winter wheat to explore the impact of night warming treatment in winter (Winter warming treatment, WT) or spring (Spring warming treatment, ST) on the senescence of flag leaves and yield of wheat plants later treated with night warming during grain filling (Warming treatment during grain filling, FT). The results showed that FT decreased wheat yield by reducing the number of grains per panicle and per 1,000-grain weight and that the yield of wheat plants treated with FT declined to a greater extent than that of wheat plants treated with WT + FT or ST + FT. The net photosynthetic rate, chlorophyll content, and chlorophyll fluorescence parameters of the flag leaves of wheat plants treated with WT + FT or ST + FT were higher than those under the control treatment from 0 to 7 days after anthesis (DAA) but were lower than those under the control treatment and higher than those of wheat plants treated with FT alone from 14 to 28 DAA. The soluble protein and Rubisco contents in the flag leaves of wheat plants treated with WT + FT or ST + FT were high in the early grain-filling period and then gradually decreased to below those of the control treatment. These contents were greater in wheat plants treated with WT + FT than in wheat plants treated with ST + FT from 0 to 14 DAA, whereas the opposite was true from 21 to 28 DAA. Furthermore, WT + FT and ST + FT inhibited membrane lipid peroxidation by increasing superoxide dismutase and peroxidase activities and lowering phospholipase D (PLD), phosphatidic acid (PA), lipoxygenase (LOX), and free fatty acid levels in the early grain-filling period, but their inhibitory effects on membrane lipid peroxidation gradually weakened during the late grain-filling period. Night-warming priming alleviated the adverse effect of post-anthesis warming on yield by delaying the post-anthesis senescence of flag leaves.
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影响因子：
4.6
作者：
Kong L;Xie Y;Hu L;Si J;Wang Z
通讯作者：
Wang Z
影响因子：
5.2
作者：
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通讯作者：
Flexas, J.
影响因子：
3.7
作者：
Beier, C;Emmett, B;Williams, D
通讯作者：
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30.7
作者：
Lobell, David B.;Sibley, Adam;Ivan Ortiz-Monasterio, J.
通讯作者：
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影响因子：
3.5
作者：
Feng, B.;Liu, P.;Zhang, J. W.
通讯作者：
Zhang, J. W.