江西农业学报2026，Vol.38Issue(5)：60-66,7.DOI:10.19386/j.cnki.jxnyxb.2026.05.008
生长素的琼脂包覆控释对烤烟上部叶内源激素代谢及耐熟性的影响
Effects of Agar-coated Controlled Release of Auxin on Endogenous Hormone Metabolism and Maturity Tolerance in Upper Leaves of Flue-cured Tobacco
摘要
Abstract
Yunyan 87 was taken as the test material.Agar blocks containing IAA were applied to topping wounds after topping,with treatments designated as CK,T1,T2,and T3(CK:agar block without IAA;T1:agar block containing 25 mg/g IAA;T2:agar block containing 50 mg/g IAA;T3:agar block containing 100 mg/g IAA).This study investigated the effects of different treatments on endogenous hormone metabolism and maturity tolerance in upper leaves of flue-cured tobacco.The results showed that T1,T2,and T3 significantly increased IAA content in the upper leaves of flue-cured tobacco and brassinolide(BR)content BR at the later stage of topping,inhibited ABA synthesis,increased the ratios of growth-promoting hormone to ABA,enhanced superoxide dismutase and peroxidase activities(POD and SOD),thereby delaying the decline rates of cell membrane stability index(MSI)and SPAD values.Thus,the application of agar-coated controlled-release IAA to topping wounds delayed leaf senescence,and ultimately improved field maturity tolerance,with the T2 treatment demonstrating the most optimal effects.关键词
生长素/烤烟上部叶/内源激素/抗氧化酶/耐熟性Key words
Auxin/Upper leaves of flue-cured tobacco/Endogenous hormone/Antioxidant enzyme/Maturity tolerance分类
农业科技引用本文复制引用
童德文,陈建军,谢俊杰,雷佳,周东新,叶卫国,石三三,岳益福,李淮源,王媛媛..生长素的琼脂包覆控释对烤烟上部叶内源激素代谢及耐熟性的影响[J].江西农业学报,2026,38(5):60-66,7.基金项目
福建省烟草公司龙岩市公司科技项目"广东中烟福建龙岩武平基地高可用性上部烟叶定向开发"(2022350824240020) （2022350824240020）
广东中烟工业有限责任公司科技项目"清甜蜜甜香型风格特色烟叶质量提升技术集成与应用"(2023440000340013) （2023440000340013）
广东省基础与应用基础研究基金项目"玉米授粉后短时间高温诱导受精失败的生理机制研究"(2022A1515110353). （2022A1515110353）
