[1]韩志平,郭世荣,冯吉庆,等.盐胁迫对西瓜幼苗生长、叶片光合色素和脯氨酸含量的影响[J].南京农业大学学报,2008,31(2):32-36.[doi:10.7685/j.issn.1000-2030.2008.02.007]
 HAN Zhi-ping,GUO Shi-rong,FENG Ji-qing,et al.Effect of salinity on plant growth,photosynthetic pigments and proline content in leaves of watermelon seedlings[J].Journal of Nanjing Agricultural University,2008,31(2):32-36.[doi:10.7685/j.issn.1000-2030.2008.02.007]
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盐胁迫对西瓜幼苗生长、叶片光合色素和脯氨酸含量的影响()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
31卷
期数:
2008年2期
页码:
32-36
栏目:
出版日期:
2008-05-30

文章信息/Info

Title:
Effect of salinity on plant growth,photosynthetic pigments and proline content in leaves of watermelon seedlings
作者:
韩志平郭世荣冯吉庆高新昊
南京农业大学园艺学院,江苏,南京,210095;南京市江宁区蔬菜技术推广站,江苏,南京,211100
Author(s):
HAN Zhi-ping GUO Shi-rong FENG Ji-qing GAO Xin-hao
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; Jiangning District Vegetable Technology Extention Station, Nanjing City, Nanjing 211100, China
关键词:
西瓜 盐胁迫 光合色素 脯氨酸
Keywords:
watermelon salinity stress photosynthetic pigments proline
分类号:
S651
DOI:
10.7685/j.issn.1000-2030.2008.02.007
文献标志码:
A
摘要:
为研究盐胁迫对西瓜植株伤害的生理机制,考察了西瓜幼苗在盐胁迫下的生长和生理响应。采用营养液水培法,研究了不同浓度NaCl胁迫对西瓜幼苗生长、叶片光合色素含量、质膜相对透性和脯氨酸含量的影响。结果表明:低浓度(25、50 mmol.L-1)NaCl处理促进了西瓜幼苗的生长,高浓度(75、100和150 mmol.L-1)NaCl胁迫则明显抑制了西瓜幼苗的生长;随NaCl浓度增加,叶片质膜相对透性显著增大;叶片光合色素含量和脯氨酸含量均表现为低浓度下增加而高浓度下降低的规律,光合色素含量在75 mmol.L-1NaCl处理下达到最大值,脯氨酸含量在50 mmol.L-1NaCl处理下达到最大值。研究表明:低浓度NaCl处理对西瓜幼苗不但未产生胁迫伤害反而对幼苗生长有促进作用,高浓度NaCl胁迫则严重抑制了西瓜幼苗生长,破坏了幼苗细胞膜结构,影响了光合色素和脯氨酸的正常代谢。
Abstract:
To lay a foundation for further studying and clarifying the physiological mechanism of watermelon plant under salinity, the growth and physiological changes of watermelon seedlings in response to salinity were explored. The effects of different concentration NaCl stress on plant growth, photosynthetic pigments content, relative membrane permeability and proline content in leaves of watermelon(Citrullus lanatus M. )seedlings grown hydroponically were studied. The results showed that lower concentration(25 and 50 mmol·L-1)NaCl treatments improved watermelon seedlings growth while higher concentration(75, 100 and 150 mmol·L-1)NaCl stresses obviously inhibited its growth;with increasing NaCl concentration, relative membrane permeability increased significantly, however, photosynthetic pigments and proline content in leaves showed clear regularity that increased at lower concentration and decreased at higher concentration, and reached the highest value at 75 mmol·L-1 NaCl for photosynthetic pigments content, at 50 mmol·L-1 NaCl for proline content. The research revealed that lower concentration salinity contributed to growth rather than caused stress-induced damage;on the contrary, higher concentration salinity significantly inhibited plant growth, destroyed the structure of cell membrane and influenced the normal metabolism of photosynthetic pigments and proline in watermelon seedlings.

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备注/Memo

备注/Memo:
江苏省自然科学基金项目(BK2006140);江苏省农业三项工程项目(SX(2005)088)
更新日期/Last Update: 2008-05-30