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NaCl胁迫对大黄龙船花生长及生理生化的影响
陆銮眉,吴福妹,张琼,林金水,卞阿娜
闽南师范大学生物科学与技术学院,闽南师范大学生物科学与技术学院,闽南师范大学生物科学与技术学院,福建省热带作物科学研究所,闽南师范大学生物科学与技术学院
摘要:  为探讨大黄龙船花(Ixora collinea‘Gillettese How’)的耐盐特性,对NaCl 胁迫下大黄龙船花扦插幼苗的生长和生理生化指标进行了研究.结果表明,NaCl 胁迫处理后大黄龙船花叶片中的丙二醛含量、相对电导率和脯氨酸含量升高,膜伤害程度加大.叶片相对电导率、丙二醛含量和脯氨酸含量与NaCl 浓度间存在显著正相关关系.随着盐胁迫浓度的增加,叶片总叶绿素、可溶性蛋白质含量呈下降趋势,两者与NaCl 浓度间呈显著负相关关系.可溶性糖含量、SOD 活性与NaCl 浓度间的相关性不显著.较低浓度的盐胁迫(0.2%~0.6%)对大黄龙船花的生长有轻微的抑制作用,而0.8%~1.5% 的高浓度盐胁迫显著影响生理生化指标.
关键词:  大黄龙船花  NaCl  生长  生理指标
DOI:10.11926/j.issn.1005-3395.2015.03.005
分类号:
基金项目:福建省科技重点项目(2012N0032); 闽南师范大学园林植物生长发育与生态配置创新团队项目(2013)资助
Growth and Physiological Indexes of Ixora collinea ‘Gillettese How’ under NaCl Stress
LU Luan-mei,WU Fu-mei,ZHANG qiong,LIN Jin-shui and BIAN A-nang
MinNan Normal University,Zhangzhou,MinNan Normal University,Zhangzhou,MinNan Normal University,Zhangzhou,Fujian Science Institute of Tropical Crops,Zhangzhou,MinNan Normal University,Zhangzhou
Abstract:  The aim was to analyze the salt resistance of Ixora collinea ‘Gillettese How’. The growth and physiology indexes in ‘Gillettese How’ seedlings were studied under NaCl stress. The results showed that the seedling growth was inhibited significantly under salt stress. The MDA and proline contents, relative electric conductivity and membrane damage increased, and they had significant positive correlations with NaCl concentration. The contents of chlorophyll and soluble protein in leaf decreased and negative correlation with NaCl concentration. However, there were no significant correlation between soluble sugar content, superoxide dismutase (SOD) activity and NaCl concentration. The growth of ‘Gillettese How’ was inhibited weakly under low NaCl stress (0.2%-0.6%), but it was affected greatly under high NaCl (0.8%-1.5%) stress.
Key words:  Ixora collinea ‘Gillettese How’  NaCl  Growth  Physiological indicator

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