新疆农业大学学报2025，Vol.48Issue(5)：409-418,10.DOI:10.20088/j.cnki.jxau.2025.05.007
外源赤霉素对灰枣花生理特性及坐果率的影响
Effect of Gibberellin Spraying on the Physiological Characteristics and Fruit Set Rate of Jujube Flowers at Different Developmental Stages
摘要
Abstract
To study the regulation mechanism of spraying gibberellin(GA3)to improve the fruit setting rate of Huizao jujube.In this study,Huizao jujube flowers sprayed with water(control)and sprayed with 20 mg/L GA3 were used as materials to systematically analyze the flowering and pollination biological characteristics,ovary cell structure,and the content dynamics of nutrients,endogenous hormones and polyamines of jujube flowers at differ-ent development stages(yellow bud stage,sepal flattening stage,filament wilting stage,ovary enlargement stage),and to explore the correlation between each index and fruit setting rate.Spraying with 20 mg/L GA3 sig-nificantly increased pollen viability and pollen germination rate,reaching 32.98％and 23.37％,respectively,and increased by 17.62％and 9.50％compared with the control,respectively(P＜0.05).The nutrient content showed a dynamic trend of'decreasing-rising-decreasing'as a whole.The content of GA3 showed a trend of'down-up-down'.Compared to the control,ABA content decreased significantly during sepal flattening(P＜0.05),showing an overall trend of'up-down-up',the content of JA increased significantly in each period(P＜0.05),showing an'up-down'trend.In the polyamine components,the contents of putrescine(Put)and spermi-dine(Spm)decreased compared with the control(P＜0.05),while the content of spermidine(Spd)increased(P＜0.05).Correlation analysis showed that the content of JA in endogenous substances was significantly posi-tively correlated with fruit set rate(P＜0.05).It is worth noting that the physiological response of jujube flowers to GA3 treatment was the most significant during the sepal flattening stage(P＜0.05).In conclution,GA3 pro-motes fruit set by improving the pollen biological characteristics of jujube and dynamically regulating endogenous substances,among which sepal flattening is the critical period for GA3 to exert its effect,and JA may be involved in fruit set regulation as an important signaling molecule and is significantly positively correlated with fruit set rate.关键词
灰枣/赤霉素(GA3)/坐果率/内源激素/萼片展平期Key words
gray jujube/gibberellin(GA3)/fruit set rate/endogenous hormones/sepal flattening period分类
农业科技引用本文复制引用
李宣瑾,李倩文,靳娟,樊丁宇,周伟权..外源赤霉素对灰枣花生理特性及坐果率的影响[J].新疆农业大学学报,2025,48(5):409-418,10.基金项目
国家自然科学基金资助项目(32160684) （32160684）
新疆维吾尔自治区重大科技专项(2023A02010-1) （2023A02010-1）
现代农业产业技术体系(CARS-30-ZZ-19),新疆红枣产业技术体系资助项目(XJCYTX-01) （CARS-30-ZZ-19）
