盐胁迫对蜡梅种子萌发及幼苗生长的影响

doi:10.3969/j.issn.1004-1524.2017.07.11

浙江农业学报 ›› 2017, Vol. 29 ›› Issue (7): 1139-1143.DOI: 10.3969/j.issn.1004-1524.2017.07.11

盐胁迫对蜡梅种子萌发及幼苗生长的影响

邵金彩, 刘玉霞, 杨佳鑫, 徐兴龙, 张启翔, 李庆卫^*

北京林业大学花卉种质创新与分子育种北京市重点实验室,国家花卉工程技术研究中心,城乡生态环境北京实验室,北京 100083

收稿日期:2016-11-22 出版日期:2017-07-20 发布日期:2017-07-24
通讯作者: 李庆卫,Email:lqw6809@bjfu.edu.cn
作者简介:邵金彩(1992—),女,河北邢台人,硕士研究生,从事园林植物与观赏园艺研究。Email:1241114326@qq.com
基金资助:
北京市科学研究与研究生培养共建项科研项目——北京实验室(2016GJ-03)

Effects of salt stress on germination and seeding of Chimonanthus praecox seeds

SHAO Jincai, LIU Yuxia, YANG Jiaxin, XU Xinglong, ZHANG Qixiang, LI Qingwei^*

Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, Beijing Forestry University, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Beijing 100083, China

Received:2016-11-22 Online:2017-07-20 Published:2017-07-24

摘要/Abstract

摘要： 为研究盐胁迫对蜡梅种子萌发的影响,探索蜡梅种子的盐胁迫响应机制,采用不同浓度NaCl溶液处理蜡梅(Chimonanthus praecox)种子,进行萌发试验,分析种子的发芽率、发芽势、发芽指数、活力指数、成活率和幼苗根长、苗长、根冠比等指标。结果表明:蜡梅种子具有耐低盐胁迫(0.4% NaCl以下)的特性,随着盐溶液浓度的升高,各项发芽指标均不同程度降低,当NaCl浓度为1.2%时,胁迫强度超出了蜡梅种子萌发所能承受的极限;0.2% NaCl溶液对蜡梅幼苗的生长没有影响,但高盐胁迫显著抑制蜡梅幼苗的生长,盐浓度越高,蜡梅幼苗的生长量越低,成活率也越低。

关键词: 盐胁迫, 蜡梅, 种子萌发, 耐盐机制

Abstract: In order to study the effects of salt stress on seed germination of Chimonanthus praecox and reveal its resistant mechanism under salt stress, NaCl solutions at different concentrations were applied to the experiment of seed germination in Ch. praecox. Seed germination rate, germination potential, germination index, vigor index, survival rate and seedling root length, seedling length, root-shoot ratio were analyzed. The results showed as follows: Ch. praecox seeds had low salt stress tolerance (0.4% NaCl or less). The germination indexes were decreased with the increasing of NaCl concentration. When the concentration of NaCl was 1.2%, the intensity of stress was beyond the limit of seed germination for Ch. praecox. 0.2% NaCl had no effect on the growth of Ch. praecox seedlings, but high salt stress significantly inhibited the growth of Ch. praecox seedlings, the higher salt stress, the lower growth of Ch. praecox seedling and the lower survival rate.

Key words: salt stress, Chimonanthus praecox, seed germination, salt-resistant mechanism

中图分类号:

S685.99

邵金彩, 刘玉霞, 杨佳鑫, 徐兴龙, 张启翔, 李庆卫. 盐胁迫对蜡梅种子萌发及幼苗生长的影响[J]. 浙江农业学报, 2017, 29(7): 1139-1143.

SHAO Jincai, LIU Yuxia, YANG Jiaxin, XU Xinglong, ZHANG Qixiang, LI Qingwei. Effects of salt stress on germination and seeding of Chimonanthus praecox seeds[J]. , 2017, 29(7): 1139-1143.

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盐胁迫对蜡梅种子萌发及幼苗生长的影响

Effects of salt stress on germination and seeding of Chimonanthus praecox seeds

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