학술논문
不同盐胁迫对决明种子萌发及幼苗生长的影响 / Effects of different salts stress on seed germination and seeding growth of Cassia obtusifolia
Document Type
Academic Journal
Source
安徽农学通报 / Anhui Agricultural Science Bulletin. 29(23):30-36
Subject
Language
Chinese
ISSN
1007-7731
Abstract
为探究不同盐胁迫下决明种子萌发及幼苗生长情况,以决明种子为试材,采用不同浓度的NaCl、Na2CO3、Na2SO4溶液以及NaCl和Na2CO3的混合液,Na2SO4和Na2CO3的混合液对种子进行盐胁迫处理,并测定种子的发芽率、发芽势、发芽指数、活力指数以及幼苗根长和苗高等指标.结果表明,随着NaCl浓度的增加,决明种子各萌发指标及幼苗的生长逐渐呈下降趋势,决明种子可以适应低浓度盐分环境,但适应能力随胁迫水平的增加而降低;随着Na2CO3、Na2SO4溶液以及NaCl和Na2CO3的混合液,Na2SO4和Na2CO3的混合液浓度的增加,种子各萌发指标及幼苗苗高呈现先增加后下降趋势,根系生长呈下降趋势,低浓度盐溶液对决明种子的萌发有一定的促进作用.决明种子对Na+、高pH和Cl-胁迫较为敏感,不同盐分类型对决明种子的胁迫强度顺序为NaCl+ Na2CO3>Na2CO3>NaCl>Na2SO4>Na2SO4+Na2CO3.
To explore the seed germination and seedling growth under different salt stress,the experiment was conducted to explore the germination rate,germination power,germination index,vigor index of Cassia obtusifolia seeds treated with different concentration solution of NaCl,Na2CO3,Na2SO4,mixed salt of NaCl and Na2CO3,mixed salt of Na2SO4 and Na2CO3.The results showed that the indexes of Cassia obtusifolia seeds all decreased with the increasing of salt of NaCl.Cassia obtusifolia could adapt to the low level of NaCl salt,and the adaptation capability decreased with the increasing level of stress.The indexes of Cassia obtusifolia seeds first increased and then decreased,the growth of root decreased with the increasing of salt of Na2CO3,Na2SO4,mixed salt of NaCl and Na2CO3,mixed salt of Na2SO4 and Na2CO3.The low level of salts promoted seeds germination.Cassia obtusifolia seeds germination were sensitive to Na+,the high pH value and Cl-.The sequence of salt stress was NaCl+Na2CO3>Na2CO3>NaCl>Na2SO4>Na2SO4+Na2CO3.
To explore the seed germination and seedling growth under different salt stress,the experiment was conducted to explore the germination rate,germination power,germination index,vigor index of Cassia obtusifolia seeds treated with different concentration solution of NaCl,Na2CO3,Na2SO4,mixed salt of NaCl and Na2CO3,mixed salt of Na2SO4 and Na2CO3.The results showed that the indexes of Cassia obtusifolia seeds all decreased with the increasing of salt of NaCl.Cassia obtusifolia could adapt to the low level of NaCl salt,and the adaptation capability decreased with the increasing level of stress.The indexes of Cassia obtusifolia seeds first increased and then decreased,the growth of root decreased with the increasing of salt of Na2CO3,Na2SO4,mixed salt of NaCl and Na2CO3,mixed salt of Na2SO4 and Na2CO3.The low level of salts promoted seeds germination.Cassia obtusifolia seeds germination were sensitive to Na+,the high pH value and Cl-.The sequence of salt stress was NaCl+Na2CO3>Na2CO3>NaCl>Na2SO4>Na2SO4+Na2CO3.