Improving Capacity of Yellow Corn Tolerance to Water Stress by Foliar Application of Ascorbic Acid and Hydrogen Peroxide

and M. G. Abas, M. Kotb, M. Hamada, M. El-sayed
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引用次数: 1

Abstract

Two field experiments were conducted in a new soil conditions in the extension field in El Qantra- West, Ismailia Governorate, Egypt (300 58/ N, 320 23/ E, and 10m above mean sea level) during 2016 and 2017 summer seasons. The study aimed to find out the effect of five exogenous application levels of AsA and H2O2 on yellow corn hybrid 352 (three way cross) under three amounts of irrigation water (1.00. 0.80 and 0.60 of the estimated crop evapotranspiration) using surface irrigation system. A randomized complete block split-plot design with three replications was used in each season. The irrigation treatments and the levels of AsA and H2O2 were randomly allocated in the main and sub-plots, respectively. The most important findings could be summarized as follows: Irrigation by 2250 m3/fad (severe water stress) instead of 3750 m3/fad (full irrigation) reduced ear leaf blade area, total chlorophyll and relative water content in both seasons. Increasing the level of AsA up to 350ppm/fad increased ear leaf blade area, total chlorophyll and relative water content followed by the highest level of H2O2 (60mM H2O2). Decreasing irrigation water significantly reduced ear length, 100-grain weight and grain yield/fad. Meanwhile, ear length, 100-grain weight and grain yield/fad were significantly obtained from the highest level of AsA followed by the highest levels of H2O2 compared with their untreated analogues. The interaction between the both studied factors showed that application of 350ppm AsA and 60mM H2O2 treatments protected about 920 and 320 kg/fad grains from collapse under moderate water stress (3000 m3/fad). Meanwhile, under severe water stress, treatments by same levels of AsA and 30mM H2O2 protected about 670 and 330kg/fad grains from lose. Application of 350ppm AsA saved approximately 750m3/fad of irrigation water without yield reduction.
叶面施用抗坏血酸和过氧化氢提高黄玉米抗水分胁迫能力
2016年和2017年夏季,在埃及Ismailia省El Qantra- West推广田(300 58/ N, 320 23/ E,海拔10m)的新土壤条件下进行了2项田间试验。本研究旨在研究在3种灌溉水量(1.00)下,5种外源施用水平AsA和H2O2对黄玉米杂种352(三交)的影响。0.80和0.60估算作物蒸散量)使用地面灌溉系统。每个季节采用完全随机区块分割区设计,3个重复。灌水处理及AsA和H2O2水平分别随机分配在主样地和副样地。最重要的结果如下:在两个季节中,以2250 m3/fad(重度水分胁迫)灌溉比3750 m3/fad(全灌)灌溉减少了穗叶面积、总叶绿素和相对含水量。当AsA浓度达到350ppm/fad时,穗叶面积、总叶绿素和相对含水量增加,H2O2浓度最高(60mM H2O2)。灌水量减少显著降低穗长、百粒重和籽粒产量。同时,与未处理的类似物相比,AsA水平最高的玉米穗长、百粒重和籽粒产量/fad显著高于H2O2水平最高的玉米。结果表明,在中等水分胁迫(3000 m3/fad)条件下,施用350ppm AsA和60mM H2O2处理可分别保护920和320 kg/fad的籽粒免于坍塌。同时,在严重水分胁迫下,相同水平AsA和30mM H2O2处理分别保护了670和330kg/fad籽粒的损失。应用350ppm AsA可节约约750m3/fad灌溉水,且不降低产量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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