【摘要】 在同一环境背景下,以辽棉1号为参照,以冷温型棉花中棉41号、炮台1号与暖温型棉花豫422、中棉5629为试材,从花期开始,通过测定群体冠层温度、叶绿素含量、可溶性蛋白质含量、超氧化物歧化酶(SOD)活性、硝酸还原酶活性、丙二醛(MDA)含量等指标,研究了棉花功能叶衰老和活性氧代谢特性。结果表明,冷温型棉花较暖温型棉花叶绿素含量、可溶性蛋白质含量下降速度慢,SOD、NR的活性较高,下降幅度小,MDA的积累速度较慢。因此,在生产实践中,可以借助冠层温度作为棉花代谢功能的外部信号,为棉花育种提供理论依据。更多还原

【Abstract】 The crop canopy temperature and its related physiological characteristics of cotton are not only varied with the genotypes but also influenced with the climate and soil,and related with the high burliness and the productivity.In order to clarify the differences of the crop canopy temperature and its related physiological characteristics of the different genotypes,this paper focus on the study of the characters of the functional leaf senescence and the activated oxygen metabolism through the comparative study of the Liaomian No.1(served as reference),Zhongmian No.41,Paotai No.1,Yu 422,Zhongmian 5629.The community canopy temperature,the content of the chlorophyll and the soluble protein,the activity of the SOD and MDA were measured at the florescence under the same conditions.The results showed that the content of the chlorophyll and the soluble protein of the cold type cotton decreased more slowly than that of the warm type cotton,with quite high activity of the SOD and NR but decrease to a quite small extent.The accumulation speed of the MDA of the cold type cotton is also more slowly than that of the warm type cotton.These results indicated that the canopy temperature can be a external signature of the metabolic function of the cotton,and can provide the theory basis for the cotton breeding in the field practice.更多还原