摘要
以佛甲草为材料,通过记录佛甲草在高温高湿环境下干旱胁迫后的形态特征变化,以及叶片中电导率、叶绿素含量、脯氨酸、超氧化物歧化酶活性、可溶性蛋白含量、可溶性糖含量、丙二醛含量等指标的测定,研究其干旱胁迫下的形态特征变化及生理响应。结果表明:自然露天生长时,外部形态受降水影响较大;干旱胁迫结束20 d后,佛甲草能恢复正常生长;电导率随着胁迫的加剧而增加,质膜受干旱胁迫的伤害较大;超氧化物歧化酶活性和可溶性糖含量表现先增加后减少,脯氨酸含量波动较大,叶绿素含量整体表现降低;丙二醛含量变化较稳定;佛甲草能忍受25 d的高温干旱。
The morphological changes and the values of electrical conductivity, chlorophyll （chl） content, proline（pro）, superoxide dismutase （sod） activity and soluble protein content, soluble sugar content, malondialdehyde （mda） content of Sedum lineare Thunb. in their leaves after drought stress under high temperature and high humidity environment was observed and determined to research morphological characteristics and physiological responses to drought stress of Sedum lineare Thunb. The results showed that the external form of Sedum lineare Thunb. was greatly influenced by precipitation in the natural outdoor environment. After 20d drought stress, it can grow back to normal. Electrical conductivity increased as stress increased, and the plasma membrane suffered the serious harm of drought stress. SOD activity and soluble sugar content increased first and then decreased. Pro content fluctuated strongly. Chl content was low in the overall process. MDA content changed relatively stable. Sedum lineare Thunb. was able to bear the high temperature of 25 ℃ .
出处
《中国园艺文摘》
2016年第7期13-17,共5页
Chinese Horticulture Abstracts
关键词
高温高湿
佛甲草
干旱胁迫
生理响应
Hot and humid
Sedum lineare Thunb.
drought stress
physiological responses
