农业生物技术学报2017，Vol.25Issue(2)：231-239,9.DOI:10.3969/j.issn.1674-7968.2017.02.007
烯效唑(S3307)对干旱胁迫下薏苡幼苗生长及生理特性的影响
Effect of Uniconazole (S3307) on Growth and Physiological Characteristics of Coix (Coix lachryma-jobi) Seedlings Under Drought Stress
摘要
Abstract
Coix (Coix lachryma-jobi) is a kind of medicine and food crop,while drought is the most main factor limiting its growth.To explore the applicative effects of uniconazole (S3307) on coix seedlings under drought stress,the growth parameters,anti-oxidant enzyme activities,chlorophyll content and chloroplast ultrastructure in Yiliao No.5 under drought stress were investigated through nutrient solution cultivation in greenhouse.The results showed that the stem diameter and ground biomass were significantly improved with 9 mg/L S3307 under drought stress (P＜0.05).Compared with the S0 (drought group),stem diameter were increased for 16.19％,and the above-ground and under-ground biomass increased for 19.56％ and 22.75％,respectively.The activities of peroxidase (POD),catalase (CAT) and superoxide dismutase (SOD) were significantly enhanced (P＜0.05),while POD and CAT activities of roots were higher than those of leafs.Total chlorophyll content in the S3 (9 mg/L S3307 group) was the highest in all the treatments,which was increased by 7.35％ compared to S0 (drought treatment group) (P＜0.05).Meanwhile,S3307 addition could improve chloroplast and root cell ultrastructure and lighten the damage to grana ultrastructure under drought stress,which was consistent with increasing chlorophyll content.All the analysis showed that 9 mg/L S3307 concentration was effective on alleviating the injury of coix seedlings under drought stress.This study can clarify physiological mechanism of coix drought resistance and provide a theoretical basis for S3307 in coix production and practice of drought resistance.关键词
烯效唑(S3307)/干旱胁迫/薏苡幼苗/抗氧化酶/超微结构Key words
Uniconazole (S3307)/Drought stress/Coix seedlings/Antioxidant enzyme/Ultrastructure分类
农业科技引用本文复制引用
黄玉兰,向君亮,殷奎德..烯效唑(S3307)对干旱胁迫下薏苡幼苗生长及生理特性的影响[J].农业生物技术学报,2017,25(2):231-239,9.基金项目
黑龙江农垦总局课题(No.HNK125B-02-03) （No.HNK125B-02-03）
