毛决明种子不同发育时期发芽力和脱水耐性的初步研究  

Preliminary Study on Germination Capacity and Desiccation-tolerance of Cassia hirsuta Seeds at Various Developmental Stages

作　　者：杨期和[1] 殷寿华[1] 夏永梅[1] 兰芹英[1] 

机构地区：[1]中国科学院西双版纳热带植物园

出　　处：《武汉植物学研究》2002年第4期288-292,共5页Journal of Wuhan Botanical Research

基　　金：中国科学院知识创新工程项目资助 (KSCX2 -3 -0 4-0 5 );中国科学院生物科学与技术研究特别支持费课题"鼎湖山南亚热带季风常绿阔叶林物种多样性的维持机制研究"(STZ97-1-0 5 )

摘　　要：毛决明种子发芽力在花后 39d后逐渐上升 ,发芽率和发芽指数在花后 5 3d,活力指数在花后 6 7d达最大值 ,而后有所降低。花后 39～ 74 d,含水量逐渐下降 ,但下降速度不等。花后 6 7d种子干重达到最大值 ,花后 6 7～74 d含水量显著下降 ,种子存在明显的成熟脱水阶段。种子的脱水耐性在花后 4 6～ 6 0 d逐渐增强 ,6 0 d达到最大值 ,后有所下降。轻微脱水可显著提高花后 4 6 d和 6 7d的种子的发芽率。花后 6 0～ 6 7d的种子能忍耐 10 %含水量 。The germination capacity of Cassia hirsuta seeds rose gradually at the early developmental stages, ie, since 39 d after anthesis, germination percentage (GP) and germination index (GI) reached the maximum at 53 days after anthesis (DAA), vigor index (VI) reached the maximum at 67 DAA, but then all decreased. The seed moisture content (MC) decreased gradually at different rates. Seed dry weight approached the maximum value at 67 DAA and a significant dehydrating stage appeared at 67～74 d. The desiccation tolerance of seeds gradually increased from 46 to 60 DAA and reached the maximum at 60 DAA following by a decrease gently dehydrating could significantly improve GI and VI of seeds at 46 and 67 DAA. The seeds with lowest MC at 60～67 DAA could tolerate approximately 10% MC, so the seed appeared to be orthodox seeds.

关 键 词：毛决明 种子 发育时期 发芽力 脱水耐性 

分 类 号：S330.3[农业科学—作物遗传育种] Q945.65[农业科学—农艺学]