摘要
通过模拟UV-B辐射,探索不同紫外辐射强度、辐射方式对烟草幼苗生长发育、光合生理、色素及多酚、糖类、烟碱等代谢产物的影响,以期探讨烤烟品质形成的生态机理。结果表明:UV-B辐射可使烟苗矮化变粗,叶面积缩小,光合效率下降,但可恢复;UV-B处理叶绿素、糖、烟碱含量下降幅度与辐射强度正相关,但微量UV-B有利于成苗叶绿素含量提高;UV-B辐射可使与植物抗逆性有关的多酚含量得到显著提高,与处理时间、强度正相关;适宜强度的UV-B预处理可使烤烟叶绿素、总类胡萝卜素和总糖含量提高。
UV-B was used to radiate flue-cured tobacco ＂K326＂. Then the effects of different modes and intensities of UV-B radiant on tobacco growth, photosynthetic physiology, pigment, polyphenols, sugar and nicotine contents studied. Results show that tobacco ＂K326＂ stem dwarfs and thickens. Also leaf area and net photosynthetic rate moderately decline when flue-cured tobacco ＂K326＂ is treated with UV-B radiation. Chlorophyll, sugar and nicotine contents decrease with increasing of UV-B radiant intensity. Chlorophyll content is enhanced by low UV-B radiant intensity. The content of polyphenol in relation to plant stress resistance increases significantly, positively correlated with treatment time and radiant intensity. Pretreatment of rational intensity of UV-B radiant can increase chlorophyU, total carotenoids, and total sugar contents.
出处
《中国生态农业学报》
CAS
CSCD
北大核心
2009年第1期140-144,共5页
Chinese Journal of Eco-Agriculture
基金
国家烟草专卖局项目(11020041012)
云南省烟草公司项目(04A02)
湖南农业大学校青年基金项目(05QN18)资助
关键词
烤烟
UV-B农艺性状
光合生理
化学成分
Flue-cured tobacco, UV-B radiation, Agronomic characteristics, Photosynthetic physiology, Chemical component
