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盐胁迫对莴苣种子萌发和幼苗生长的影响
引用本文:任艳芳,何俊瑜,何师加. 盐胁迫对莴苣种子萌发和幼苗生长的影响[J]. 北方园艺, 2008, 0(8)
作者姓名:任艳芳  何俊瑜  何师加
作者单位:贵州大学,农学院,贵州,贵阳,550025
基金项目:贵州省自然科学基金,贵州大学校科研和教改项目
摘    要:通过研究不同浓度(50、100、150、200 mmol·L-1)NaCl胁迫对莴苣种子萌发特性和幼苗生长的影响,结果表明:50 mmol·L-1NaCl胁迫下,华艺奶油莴苣的发芽率、发芽势和发芽指数比对照略有增加,随着盐浓度的升高,发芽率、发芽势、发芽指数和活力指数都有不同程度的下降.200 mmol·L-1 NaCl胁迫下种子萌发完全受到抑制.随着盐浓度的增加,根和芽的长度和鲜重NaCl胁迫也表现为不同程度的降低,且根的下降幅度比胚芽大,说明盐胁迫对根的抑制作用大于芽.

关 键 词:盐胁迫  萌发  幼苗生长  莴苣

Effects of Salt Stress on Germination of Lettuce Seed and Growth of Seedling
REN Yan-fang,HE Jun-yu,HE Shi-jia. Effects of Salt Stress on Germination of Lettuce Seed and Growth of Seedling[J]. Northern Horticulture, 2008, 0(8)
Authors:REN Yan-fang  HE Jun-yu  HE Shi-jia
Abstract:The effects of different NaCl concentration on germination of lettuce seed and growth of seedling were investigated.The results showed that germination rate,germination vigor and germination index of "Huayinaiyou" lettuce seeds was a little higher compared with control under the stress of 50 mmol/L NaCl.With the increase of NaCl stress,germination rate,germination vigor,germination index and vigor index decreased to some degree.The length and fresh weight of root and plumula were also inhibited obviously by NaCl stress.Moreover the growth of root was stronger inhibited by NaCl stress than that of the plumule.It indicated that the root was more sensitive to NaCl stress.
Keywords:Salt stress  Germination  Seedling growth  Lettuce
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