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  

Response of super and inferior grain filling characteristics in rice to exogenous plant growth regulators based on Richards equation

作　　者：文廷刚[1,2] 贾艳艳 杜小凤[1] 尤杰[1] 殷小冬 文章荣 杨文飞 施洪泉[1] 高怀中 诸俊 孙爱侠[1] 顾大路 WEN Tinggang;JIA Yanyan;DU Xiaofeng;YOU Jie;YIN Xiaodong;WEN Zhangrong;YANG Wenfei;SHI Hongquan;GAO Huaizhong;ZHU Jun;SUN Aixia;GU Dalu(Huaiyin Institute of Agricultural Sciences of Xuhuai Region in Jiangsu,Huai’an 223001,China;Jiangsu Engineering and Technology Research Center for Plant Growth Regulators,Huai’an 223001,China)

机构地区：[1]江苏徐淮地区淮阴农业科学研究所,江苏淮安223001 [2]江苏省植物生长调节剂工程技术研究中心,江苏淮安223001

出　　处：《南京农业大学学报》2022年第6期1107-1116,共10页Journal of Nanjing Agricultural University

基　　金：江苏省自然科学基金项目(BK20200264);淮安市农业科学研究院科研发展基金项目(HNY202010);江苏省第五期“333工程”培养资金资助项目(BRA2020222)。

摘　　要：[目的]本文旨在通过Richards方程分析水稻强、弱势粒的灌浆参数对不同外源植物生长调节剂(PGR)处理的响应,为外源PGR在调控籽粒灌浆,特别是弱势粒灌浆提供理论指导。[方法]以‘南粳9108’为研究材料,在齐穗期喷施脱落酸(ABA)和乙烯利(ETH),以清水为对照。利用Richards方程对强、弱势粒进行灌浆拟合,并通过灰色系统关联度分析、通径分析等方法对强、弱势粒灌浆参数进行深入分析,研究外源PGR对其的调控作用。[结果]采用Richards方程能较好拟合出‘南粳9108’的强、弱势粒灌浆过程。在外源PGR处理下,强势粒的灌浆起始势(R_(0))、渐增期灌浆速率(V_(1))、快增期灌浆速率(V_(2))和持续时间(T_(2))与粒重提升紧密相关,而弱势粒则以快增期灌浆速率(V_(2))与粒重的增加最密切。ABA处理能有效提高强势粒的干物质积累和籽粒灌浆速率;而ETH处理对弱势粒的灌浆和干物质积累有促进作用。进一步分析显示,ABA主要通过提高强势粒的灌浆起始势和渐增期灌浆速率来促进籽粒的灌浆和充实度,ETH则通过提高最大灌浆速率以及平均灌浆速率,特别是快增期灌浆速率来增加弱势粒的粒重。[结论]‘南粳9108’为强、弱势粒异步灌浆型品种。ABA处理有利于强势粒的干物质积累和籽粒灌浆,而ETH则在弱势粒的籽粒灌浆和干物质积累上有显著促进作用。[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(R_(0)),increasing grain filling rate(V_(1)),rapid grain filling rate(V_(2))and duration(T_(2))of strong grain were closely related to the increase of grain weight,while the rapid grain filling rate(V_(2))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

关 键 词：水稻 籽粒灌浆 外源植物生长调节剂 RICHARDS方程 

分 类 号：S511[农业科学—作物学]