期刊论文

中文

中国生态农业学报(中英文)

2096-6237

2009

17

1

140-144

10.3724/SP.J.1011.2009.00140

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；

本校为第一机构

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-...