Moringa leaf and sorghum water extracts and salicylic acid to alleviate impacts of heat stress in wheat
Moringa leaf and sorghum water extracts and salicylic acid to alleviate impacts of heat stress in wheat
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DOI：
10.1016/j.sajb.2019.04.009
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发表时间：
2020-03-01
影响因子：
3.1
通讯作者：
Basra, S. M. A.
中科院分区：
文献类型：
--
作者：
Afzal, I;Akram, M. W.;Basra, S. M. A.
晚播小麦作物在灌浆期经常遭受高温胁迫，导致作物的整体表现下降。采用田间试验研究了辣木叶提取物（MLE）、高粱水提取物（SWE）和水杨酸（SA）沿着施用对小麦品种Sehar-06和Fsd-08高温胁迫的缓解作用。用透明塑料薄膜覆盖小麦植株，对小麦进行热胁迫处理.为缓解热胁迫对小麦的伤害效应，采用3% MLE、0.075% SWE、0.01% SA三种不同促生长物质（包括蒸馏水），每隔一个月施用一次。结果表明，土壤水分利用和土壤水分利用最大限度地提高了穗长、穗粒数和千粒重等产量贡献因子。另一方面，最大有效分蘖数和生物产量记录SA和MLE。SA和MLE处理分别使Sehar-06的蛋白质含量和CAT活性达到最高，而MLE处理使Fsd-08的POD活性达到最高。SA最大限度地提高了两个小麦品种的游离脯氨酸，而总可溶性糖的MLE。总之，外源施用天然和合成的生长促进物质可以通过改善小麦的生长发育、代谢产物的积累、相对含水量和减少氧化损伤来提高小麦的耐热性。(C)2019款萨博。Elsevier B. V.出版，保留所有权利。
Late planted wheat crop is often subjected to high temperature stress during grain filling which leads to a decline in overall performance of the crop. A field study was conducted to mitigate the impact of heat stress on wheat cultivars (Sehar-06 and Fsd-08) by exogenous application of moringa leaf extract (MLE) along with sorghum water extract (SWE) and salicylic acid (SA). The plants were covered with transparent plastic sheet tunnel to impose heat stress on wheat. To alleviate the damaging effects of heat stress on wheat, different growth promoting substances (3% MLE, 0.075% SWE, 0.01% SA) including distilled water were applied with an interval of one month. The results revealed that SWE and MLE maximally enhanced yield contributing factors i.e. spike length, number of grains per spike and 1000-grain weight. On the other hand, maximum number of productive tillers and biological yield were recorded with SA and MLE. Maximum protein and CAT were recorded in Sehar-06 due to SA and MLE treatments, respectively while Fsd-08 showed higher activity of POD with MLE spray. SA maximally enhanced free proline in both wheat cultivars while total soluble sugars by MLE. In conclusion, exogenous application of natural and synthetic growth promoting substances could be useful to enhance heat tolerance of wheat plants by improving growth and development, accumulation of metabolites, relative water contents and minimizing oxidative damage. (C) 2019 SAAB. Published by Elsevier B.V. All rights reserved.