生态学杂志2012，Vol.31Issue(4)：804-810,7.
黑果枸杞种子萌发及幼苗生长对盐胁迫的响应
Responses of seed germination and seedling growth of Lycium ruthenicum to salt stress
摘要
Abstract
Lycium ruthenium seeds were collected from the desert edge of middle Hexi Corridor, Gansu Province of Northwest China to study their water absorption and swelling rates and germination potential and the seedling' s growth inO, 1, 2, 3, 6, 9, 14, and 18 g ? L~' of NaCl, MgS04, and salted soil solutions, and to observe the responses of the seeds after the stress released. With the increasing salt concentration, the water absorption and swelling rates of the seeds decreased after an initial increase, and the water absorption rate was slowed down with the increasing salt stress duration. The seed germination percentage decreased with increasing salt stress, but still maintained at a higher level after the stress released. The seed germination index , seed vigor index, root length, and hypocotyl length decreased or decreased after an initial increase, and the ratio of root length to hypocotyl length increased first and decreased then with the increasing salt stress. The damaged percentage of the seedlings increased with the increasing salt concentration, and the stress effect was in the order of NaCl > MgSO4> salted soil solution. The seed germination and seedling growth of L. Ruthenium were more sensitive to NaCl stress, with the tolerance threshold being 6 g ? L . The seed germination could tolerate higher concentration MgSO4 stress, but the seedlings growth was more sensitive to MgSO4 stress, with a threshold of 9 g ? L"1. Both the seed germination and the seedlings growth had higher tolerance and adaptability to salted soil.关键词
黑果枸杞/萌发/幼苗生长/盐胁迫Key words
Lycium ruthenicum/ seed germination/ seedling growth/ salt stress.分类
农业科技引用本文复制引用
王桔红,陈文..黑果枸杞种子萌发及幼苗生长对盐胁迫的响应[J].生态学杂志,2012,31(4):804-810,7.基金项目
国家自然科学基金项目(31040009)、甘肃省自然科学基金项目(1010RJZG204)、甘肃省高校河西走廊特色资源利用省级重点实验室基金项目(XZ1013)和甘肃省教育厅研究生导师基金项目(1009-08)资助. （31040009）
