热带作物学报2024，Vol.45Issue(2)：362-369,8.DOI:10.3969/j.issn.1000-2561.2024.02.016
甘薯萌芽性与贮藏期块根内源激素变化及淀粉代谢的关系
Endogenous Hormone Content and Starch Metabolism of Storage Roots During Storage and Its Relationship with Germination in Sweet Potato
摘要
Abstract
Five sweet potato cultivars with significant differences in germination,Jixu 23,Yanshu 25,Red Banana,Taizhong No.6 and Xinxiang,were used as the test materials.During the storage period,samples were taken regularly to analyze the changes of endogenous hormones and carbohydrate metabolism in the storage roots.Storage roots after storage were planted for seedlings in small arch sheds and investigated.The results showed that Jixu 23,Yanshu 25 and Red Banana germinated earlier,and the number of seedlings picked was significantly more than that of Taizhong 6 and Xinxiang.At the end of storage and before seeding,the starch content and amylopectin content of storage roots in Jixu 23,Yanshu 25 and Red Banana were significantly higher than those of Taizhong No.6 and Xinxiang,Jixu 23,Yanshu 25 and Red Banana.Higher content of amylopectin and amylopectin was mainly due to the smaller decrease during storage.The total amylase and α-amylase activity of storage roots in Jixu 23,Yanshu 25 and Red Banana were significantly higher than that of Taizhong No.6 and Xinxiang,and the α-amylase activity of storage roots in Jixu 23,Yanshu 25 and Red Banana were higher than that of Jixu 23,Yanshu 25 and Red Banana.This is mainly due to the larger increase dur-ing storage.At the end of storage and before seeding,compared with Taizhong No.6 and Xinxiang,Jixu 23,Yanshu 25 and Red Banana had higher GA3 content,lower IAA content,and higher GA3/ABA and ZR/IAA of storage roots.That is,at the end of storage and before seeding,high starch and amylopectin content,high α-amylase activity,high endogenous GA3 content,and low IAA content in storage roots are physiological indicators of good germination.关键词
甘薯/萌芽/淀粉/淀粉酶/激素Key words
sweet potato/germination/starch/amylase/hormone分类
农业科技引用本文复制引用
李玉洁,王宁,孟亚依,海雪,邢会贤,柳洪鹃,史春余,司成成..甘薯萌芽性与贮藏期块根内源激素变化及淀粉代谢的关系[J].热带作物学报,2024,45(2):362-369,8.基金项目
海南省自然科学基金青年基金项目(No.320QN190) （No.320QN190）
海南省科技专项(No.ZDYF2022XDNY264) （No.ZDYF2022XDNY264）
国家自然科学基金地区科学基金项目(No.32060716). （No.32060716）
