扬州大学学报（农业与生命科学版）2026，Vol.47Issue(2)：13-22,10.DOI:10.16872/j.cnki.1671-4652.2026.02.002
耐迟播小麦品种扬麦25种子萌发与幼苗生长的生理特性分析
Physiological characteristics analysis of seed germination and seedling growth in late-sowing tolerant wheat variety Yangmai 25
摘要
Abstract
To reveal the physiological basis of late sowing tolerance in Yangmai 25,this study compared it with the late sowing-sensitive cultivar Yangmai 20,to analyze the physiological characteristics of Yangmai 25 during seed germination under delayed sowing conditions.The results showed that:the germination potential and germination rate of Yangmai 25 were consistently and significantly higher than those of Yangmai 20 at the seed germination stage;Within the same time frame,the endosperm underwent accelerated depletion,leading to more rapid formation of apoptotic cavities with in-creased conspicuousness;at the cellular level,amyloplasts in the endosperm cells of Yangmai 25 underwent accelerated ly-sis;During the 72-hour water immersion period,the soluble sugar content and amylase activity in Yangmai 25 were sig-nificantly higher than those in Yangmai 20.At 8 hours of immersion,the gibberellin(GA3)content in Yangmai 25 seeds markedly exceeded that of Yangmai 20,while the zeatin(ZT)levels in Yangmai 25 seeds were consistently higher at 8,24,and 72 hours.Furthermore,during the seedling development stage,Yangmai 25 showed significantly greater plant height,fresh and dry weight of leaves and roots,and higher root activity than Yangmai 20,indicating a more robust root system and stronger growth potential.These physiological traits enable Yangmai 25 to germinate rapidly and establish ro-bust seedlings under late sowing conditions,laying a material foundation for early wheat development,mitigating the ad-verse effects of delayed sowing on growth,and providing theoretical support for breeding late sowing-tolerant wheat varieties.关键词
小麦/耐迟播/扬麦25/种子萌发/幼苗生长Key words
wheat/late sowing tolerance/yangmai 25/seed germination/seedling growth分类
农业科技引用本文复制引用
黎文龙,陈昕钰,胡天宇,王慧,高德荣,吴宏亚,熊飞,刘大同..耐迟播小麦品种扬麦25种子萌发与幼苗生长的生理特性分析[J].扬州大学学报（农业与生命科学版）,2026,47(2):13-22,10.基金项目
国家重点研发计划项目(2024YFD1201100) （2024YFD1201100）
江苏里下河地区农科所科研发展专项[SJ(22)106] （22）
扬州市英才培育计划[(2024)YZRC-057] （2024）
