Ecological adaptability of flue-cured tobacco planted in two ecological sub-regions at different altitudes in low latitude plateau of Yunnan Province, Southwest China
Taking the flue-cured tobacco variety K326 as test material, this paper studied its leaf stable carbon isotope composition (S13C) , photosynthetic pigments content, and stress-resistance physiology in the period from vigorous growth to mature at Daguan ( 1065. 5 m a. S. 1. ) and Zhaoyang ( 1949. 5 m a. S. 1. ) of Zhaotong City, Yunnan Province of Southwest China, aimed to understand the ecological adaptability of flue-cured tobacco planted in different ecological sub-regions in low latitude plateau. The K326 had a higher leaf <513C value at Daguan than at Zhaoyang. As compared with that at vigorous growth stage, the leaf 513C value at mature stage was increased by 0. 19%c at Zhaoyang but decreased by 0. 16%o at Daguan. Both the decreasing rate of leaf chlorophyll content and the accumulation rate of leaf MDA content were higher at Zhaoyang than at Daguan, and the accumulated amount of leaf total polyphenol from vigorous growth stage to mature period was higher at Zhaoyang than at Daguan. The leaf mass per area ( LMA) was significantly higher (P<0. 05) at Zhaoyang than at Daguan, and had a greater increment from vigorous growth stage to mature stage at Zhaoyang. All the results indicated that the flue-cured tobacco variety K326 had different adaptability in assimilation ability and stress-resistance physiology to different ecological environmental conditions.
国家科技期刊平台
NSTL
万方数据
维普
