We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
基于Richards方程的水稻强、弱势籽粒灌浆特征对外源植物生长调节剂的调控响应.
- Authors
文廷刚; 贾艳艳; 杜小凤; 尤杰; 殷小冬; 文章荣; 杨文飞; 施洪泉; 高怀中; 诸俊; 孙爱侠; 顾大路
- Abstract
[Objectives]The present study aimed to analyze the response of grain filling parameters of super and inferior grains in rice to different exogenous plant growth regulators(PGR) by Richards equation, and to provide theoretical guidance for exogenous PGR in regulating grain filling, especially inferior grain filling. [Methods]‘Nanjing 9108', a japonica rice variety, was used as the research material, abscisic acid(ABA) and ethephon(ETH) were sprayed at full heading stage of rice, and purified water was used as the control. Richards equation was used to fit the grain filling parameters of super and inferior grain, and the grey system correlation analysis and path analysis were also adopted to deeply analyze filling parameters of super and inferior grain so as to study the regulation effect of exogenous PGR. [Results]Richards equation could fit the filling process of super and inferior grains of ‘Nanjing 9108' well. Under the treatment of exogenous PGR, the grain filling initial potential(R0), increasing grain filling rate(V1), rapid grain filling rate(V2) and duration(T2) of strong grain were closely related to the increase of grain weight, while the rapid grain filling rate(V2) of inferior grain was most closely related to the increase of grain weight. ABA treatment significantly enhanced the dry matter accumulation and grain filling of super grains. However, ETH treatment could promote the grain filling and dry matter accumulation of inferior grains. Further analysis showed that ABA mainly promoted grain filling and plumpness by increasing the initial filling potential of super grains and the filling rate at the increasing stage, while ETH increased grain weight by improving the maximum filling rate and the average filling rate, especially the filling rate of inferior grain at the rapid increasing stage. [Conclusions]‘Nanjing 9108'is a super and inferior grain asynchronous filling variety. ABA treatment was in favor of the dry matter accumulation and grain filling for super grains, while ETH played an important role on promoting the grain filling and dry matter accumulation of inferior grains.
- Subjects
PLANT regulators; PATH analysis (Statistics); ABSCISIC acid; RICE; GRAIN drying; ETHEPHON
- Publication
Journal of Nanjing Agricultural University / Nanjuing Nongye Daxue Xuebao, 2022, Vol 45, Issue 6, p1107
- ISSN
1000-2030
- Publication type
Article
- DOI
10.7685/jnau.202111026