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抗坏血酸对老芒麦老化种子发芽及幼苗生长的影响

发表时间:2016-05-15  浏览量:1489  下载量:555
全部作者: 闫慧芳,朱艳乔,毛培胜
作者单位: 中国农业大学动物科学技术学院,草业科学北京市重点实验室
摘 要: 试验以2.0 mmol•L-1抗坏血酸(ascorbic acid,AsA)浸泡处理的老芒麦(Elymus sibiricus)种子为材料,通过45℃、100%相对湿度条件下加速老化处理12,36,60,84,108 h,测定老化后种子发芽率、幼苗苗长、苗重、根长、根重和活力指数变化,以探究AsA对老芒麦老化种子发芽及幼苗生长的影响。结果表明,低老化程度时(36 h以下),AsA可以显著(P<0.05)抑制种子发芽率、幼苗苗长、根重和活力指数的降低,而较高老化程度时(60~108 h),AsA对种子发芽及幼苗生长没有显著效果。因此,AsA对老芒麦老化种子发芽及幼苗生长的作用效果与种子的老化程度密切相关。
关 键 词: 草原学;老芒麦;抗坏血酸;种子发芽;幼苗生长;老化时间
Title: Effects of ascorbic acid on germination and seedling growth in Elymus sibiricus seeds with different ageing duration
Author: YAN Huifang, ZHU Yanqiao, MAO Peisheng
Organization: Beijing Key Laboratory of Grassland Science, College of Animal Science and Technology, China Agricultural University
Abstract: For purpose to explore the effects of ascorbic acid (AsA) on germination and seedling growth of aged Elymus sibiricus seeds, the present study measured the germination percentage, shoot length, shoot weight, root length, root weight and vigour index of AsA pre-soaked E. sibiricus seeds which were accelerated ageing for 12, 36, 60, 84, 108 h at 45℃ and 100% relative humidity conditions. The results indicate that AsA significantly (P<0.05) inhibits the loss of germination percentage, shoot length, root weight and vigour index of aged seeds at low ageing level (below 36 h), whereas has no significant effects (P>0.05) on seed germination and seedling growth at high ageing level (60-108 h). There is a close relationship between the effects of AsA on seed germination and seedling growth and the degree of seed ageing.
Key words: range science; Elymus sibiricus; ascorbic acid; germination; seedling growth; different ageing duration
发表期数: 2016年5月第9期
引用格式: 闫慧芳,朱艳乔,毛培胜. 抗坏血酸对老芒麦老化种子发芽及幼苗生长的影响[J]. 中国科技论文在线精品论文,2016,9(9):949-954.
 
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