外源脱落酸及其抑制剂喷施对夏玉米子粒灌浆及内源激素含量的影响  

Effects of Exogenous Abscisic Acid and Its Inhibitor Spraying on Grain Filling and Endogenous Hormone Content of Summer Maize

作　　者：乔江方[1] 何佳雯 张美微[1] 张盼盼 李川[1] 牛军 郭涵潇 穆蔚林 QIAO Jiang-fang;HE Jia-wen;ZHANG Mei-wei;ZHANG Pan-pan;LI Chuan;NIU Jun;GUO Han-xiao;MU Wei-lin(Cereal Crops Institute,Henan Academy of Agricultural Sciences,Zhengzhou 450002;School of Agricultural Sciences,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]河南省农业科学院粮食作物研究所,郑州450002 [2]郑州大学农学院,郑州450001

出　　处：《玉米科学》2024年第5期50-59,共10页Journal of Maize Sciences

基　　金：“十四五”国家重点研发计划项目(2022YFD2300803、2022YFD2300805)。

摘　　要：以子粒脱水速率快的玉米品种迪卡517(DK517)和脱水速率较慢的玉米品种郑单1002(ZD1002)为试材,研究玉米子粒形成过程中子粒灌浆、水分含量及内源激素含量变化。结果表明,外源脱落酸(ABA)处理下,DK517活跃灌浆期较ZD1002延长3.42 d,灌浆速率最大时的生长量(Wmax)较ZD1002降低。授粉后58 d,ABA喷施后DK517和ZD1002子粒含水率分别较对照增加5.83%和3.01%;ABA抑制剂处理后子粒含水率总体上较对照降低。ABA处理下DK517子粒含水率低于ZD1002,子粒脱水速率较ZD1002高。不同脱水类型玉米品种子粒灌浆速率和脱水速率均与内源激素含量有关。ABA调控子粒灌浆过程,外源喷施ABA后内源激素含量变化及其互作关系均在子粒灌浆过程中起重要作用。The fast grain dehydration rate maize variety Dika517(DK517)and the slow grain dehydration rate maize variety Zhengdan1002(ZD1002)were used as test materials to study the changes in grain filling,water content,and endogenous hormone content during the formation of maize seeds.The results showed that under exogenous ABA treatment,the active filling period of DK517 was prolonged by 3.42 days compared to ZD1002,and the growth amount(Wmax)at the maximum filling rate was lower than that of ZD1002.58d after pollination,the grain moisture content of DK517 and ZD1002 increased by 5.83%and 3.01%respectively after ABA spraying compared to the control;and after ABA inhibitor treatment,the overall grain moisture content decreased compared to the control.Under ABA treatment,the moisture content of DK517 grains was lower than that of ZD1002,but the dehydration rate of DK517 was higher than that of ZD1002.The grain filling rate and dehydration rate of maize varieties with different dehydration types are related to the endogenous hormone content.It can be seen that ABA regulates the grain filling process,and the changes of endogenous hormone content and their interaction after exogenous spraying ABA play an important role in the grain filling process.

关 键 词：夏玉米 脱落酸 子粒灌浆 子粒脱水 内源激素 

分 类 号：S513.01[农业科学—作物学]