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Plant Growth Regulators Can Affect the Physiological Traits of Foxtail Millet (Setaria italica) Under Deficit Irrigation
Gesunde Pflanzen ( IF 3.1 ) Pub Date : 2023-07-18 , DOI: 10.1007/s10343-023-00911-7
Mohsen Shokhmgar , Mohammadjavad Seghatoleslami , Seyyed Gholamreza Moosavi , Reza Baradaran

In order to evaluate the effect of some plant growth regulators on yield and several physiological traits of foxtail millet under drought stress condition an experiment in split plot arranged in randomized complete block design with three replications was conducted in two years of 2017 and 2018 at the research field of Azad University of Birjand. Experimental factors included drought stress as main factor in three levels (irrigation in 30, 70 and 100% of plant water requirement) and foliar application of plant growth regulators as sub plot in five types (control and foliar application of putrescine at 88.15 mg/l, humic acid at 1.5 kg/ha, salisylic acid at 138.121 mg/l and methanol at a volume of 25%). Results showed that drought stress led to significant reduction in grain yield, relative water content, Chlorophyll a, Chlorophyll b, Chlorophyll a + b and carotenoid by 58.4, 23.5, 19.2, 38.7, 24.5 and 19% and significant increase in proline accumulation and soluble carbohydrates by 53.3 and 32.1%, respectively. Foliar application of putrescine, humic acid, salisylic acid and methanol enhanced millet grain yield by 8.3, 23.9, 17.1 and 19.6%, respectively and improvement of physiological traits in contrast to control treatment. Generally, results revealed that application of plant growth regulators improved foxtail millet grain yield under water stress via increase in photosynthetic pigments, relative water content and accumulation of osmolyte regulators. Application of humic acid under optimal irrigation condition and application of methanol in severe drought stress had the highest impact in improving grain yield.



中文翻译:

植物生长调节剂可影响缺水灌溉下谷子(Setaria italica)的生理特性

为评价干旱胁迫条件下某些植物生长调节剂对谷子产量及若干生理性状的影响,于2017年和2018年两年在比尔詹德阿扎德大学研究领域进行了随机完全区组设计、3次重复的裂区试验。实验因素包括干旱胁迫作为主要因素的三个水平(按植物需水量的30%、70%和100%进行灌溉)和叶面施用植物生长调节剂作为五种类型的次小区(对照和叶面施用腐胺88.15 mg/l、腐植酸1.5 kg/ha、水杨酸138.121 mg/l和甲醇25%体积)。结果表明,干旱胁迫导致粮食产量、相对含水量、叶绿素a、叶绿素b、叶绿素 a + b 和类胡萝卜素分别增加 58.4、23.5、19.2、38.7、24.5 和 19%,脯氨酸积累和可溶性碳水化合物分别显着增加 53.3 和 32.1%。与对照处理相比,叶面喷施腐胺、腐殖酸、水杨酸和甲醇分别使小米籽粒产量提高了8.3%、23.9%、17.1%和19.6%,并改善了生理性状。总体而言,结果表明,施用植物生长调节剂可通过增加光合色素、相对含水量和渗透调节剂的积累来提高水分胁迫下的谷子产量。最佳灌溉条件下施用腐植酸和严重干旱胁迫下施用甲醇对提高粮食产量的影响最大。5 和 19%,脯氨酸积累和可溶性碳水化合物分别显着增加 53.3 和 32.1%。与对照处理相比,叶面喷施腐胺、腐殖酸、水杨酸和甲醇分别使小米籽粒产量提高了8.3%、23.9%、17.1%和19.6%,并改善了生理性状。总体而言,结果表明,施用植物生长调节剂可通过增加光合色素、相对含水量和渗透调节剂的积累来提高水分胁迫下的谷子产量。最佳灌溉条件下施用腐植酸和严重干旱胁迫下施用甲醇对提高粮食产量的影响最大。5 和 19%,脯氨酸积累和可溶性碳水化合物分别显着增加 53.3 和 32.1%。与对照处理相比,叶面喷施腐胺、腐殖酸、水杨酸和甲醇分别使小米籽粒产量提高了8.3%、23.9%、17.1%和19.6%,并改善了生理性状。总体而言,结果表明,施用植物生长调节剂可通过增加光合色素、相对含水量和渗透调节剂的积累来提高水分胁迫下的谷子产量。最佳灌溉条件下施用腐植酸和严重干旱胁迫下施用甲醇对提高粮食产量的影响最大。与对照处理相比,叶面喷施腐胺、腐殖酸、水杨酸和甲醇分别使小米籽粒产量提高了8.3%、23.9%、17.1%和19.6%,并改善了生理性状。总体而言,结果表明,施用植物生长调节剂可通过增加光合色素、相对含水量和渗透调节剂的积累来提高水分胁迫下的谷子产量。最佳灌溉条件下施用腐植酸和严重干旱胁迫下施用甲醇对提高粮食产量的影响最大。与对照处理相比,叶面喷施腐胺、腐殖酸、水杨酸和甲醇分别使小米籽粒产量提高了8.3%、23.9%、17.1%和19.6%,并改善了生理性状。总体而言,结果表明,施用植物生长调节剂可通过增加光合色素、相对含水量和渗透调节剂的积累来提高水分胁迫下的谷子产量。最佳灌溉条件下施用腐植酸和严重干旱胁迫下施用甲醇对提高粮食产量的影响最大。结果表明,施用植物生长调节剂通过增加光合色素、相对含水量和渗透调节剂的积累,提高了水分胁迫下的谷子产量。最佳灌溉条件下施用腐植酸和严重干旱胁迫下施用甲醇对提高粮食产量的影响最大。结果表明,施用植物生长调节剂通过增加光合色素、相对含水量和渗透调节剂的积累,提高了水分胁迫下的谷子产量。最佳灌溉条件下施用腐植酸和严重干旱胁迫下施用甲醇对提高粮食产量的影响最大。

更新日期:2023-07-19
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