Regulation of 6-Benzylaminopurine on Wheat (Triticum aestivum L.) Grain Weight Under Waterlogging and Shading After Anthesis

IF 3.7 2区 农林科学 Q1 AGRONOMY
Wenjing Zhang, Anmin Zhang, Zihong Li, Beibei Wang, Jiameng Luan, Xiangshuo Zhang, Shangyu Ma, Yonghui Fan, Zhenglai Huang
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Abstract

Waterlogging during the anthesis, exacerbated by continuous rainy weather and heavy soil, has become a primary limiting factor affecting wheat yield in southern China's rice-wheat rotation regions. Previous research indicates that utilizing exogenous 6-benzylaminopurine (6-BA) can effectively alleviate the adverse effects of continuous rain on wheat yield, while the fundamental process is yet to be fully understood. In this research, two wheat varieties with contrasting waterlogging sensitivities were selected, which were exposed to waterlogging and shading for 7, 11, and 15 days after anthesis. Subsequently, three different concentrations of 6-BA solution (15, 25, and 35 mg L−1) were applied through spraying. The application of 6-BA significantly increased the total soluble sugar and starch content in grains during the filling process, as well as enhanced the activities of starch synthesis-related enzymes: sucrose synthase (SuS, EC 2.4.1.13), ADP-glucose pyrophosphorylase (AGPase, EC 2.7.7.21), and starch phosphorylase (Pho, EC 2.4.1.1). Moreover, the application of 6-BA notably enhanced the transfer and transport rate for non-structural carbohydrates (NSC) in the stem and sheath. It resulted in a notable increase in the distribution ratio of dry matter in the grain, ultimately leading to higher grain weight and yield. Applying 6-BA through spraying mitigated the adverse effects of waterlogging and shading on starch accumulation and dry matter transport in grains, thereby improving grain weight. The most effective concentration in this experiment was 25 mg L−1.

6-苄基氨基嘌呤对小麦(Triticum aestivum L.)开花后水涝和遮光条件下籽粒重量的调控
在中国南方稻麦轮作地区,连续阴雨天气和重度土壤加剧了开花期的涝害,已成为影响小麦产量的主要限制因素。以往的研究表明,利用外源 6-苄基氨基嘌呤(6-BA)可有效缓解连阴雨对小麦产量的不利影响,但其基本过程尚未完全清楚。在这项研究中,选取了两个对水涝敏感性截然不同的小麦品种,分别在花后 7、11 和 15 天暴露于水涝和遮光环境中。随后,喷洒三种不同浓度的 6-BA 溶液(15、25 和 35 mg L-1)。在灌浆过程中,施用 6-BA 能显著提高谷粒中的总可溶性糖和淀粉含量,并增强淀粉合成相关酶的活性:蔗糖合成酶(SuS,EC 2.4.1.13)、ADP-葡萄糖焦磷酸化酶(AGPase,EC 2.7.7.21)和淀粉磷酸化酶(Pho,EC 2.4.1.1)。此外,施用 6-BA 还显著提高了茎和鞘中非结构碳水化合物(NSC)的转移和运输速率。这显著提高了谷物中干物质的分配比例,最终提高了谷物的重量和产量。通过喷洒 6-BA 可减轻水涝和遮光对谷粒中淀粉积累和干物质运输的不利影响,从而提高粒重。本实验中最有效的浓度为 25 mg L-1。
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来源期刊
Journal of Agronomy and Crop Science
Journal of Agronomy and Crop Science 农林科学-农艺学
CiteScore
8.20
自引率
5.70%
发文量
54
审稿时长
7.8 months
期刊介绍: The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.
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