煙葉白化對(duì)烤煙生理生化性狀的影響
Effects of Leaf Chlorosis on Physiological and Biochemical Characteristics of Flue-cured Tobacco
-
摘要: 研究比較了白化煙株和正常煙株理化性狀的差異,。結(jié)果表明，白化煙株葉片干鮮比降低,，葉綠體色素含量明顯低于正常煙株,，且葉綠素a的降解速度高于葉綠素b，葉綠素的降解速度高于類(lèi)胡蘿卜素,。丙二醛和可溶性糖含量高于正常煙株,，且可溶性糖含量差異極顯著，而根系活力與正常煙株的根系活力差異不顯著,。白化煙株莖中的可溶性糖,、還原糖和煙堿含量低,，而淀粉含量高；下二棚葉片中總糖和還原糖的含量高于正常煙株,，煙堿含量低于正常煙株,，莖、葉中蛋白質(zhì)和總氮含量差異不大,。Abstract: The differences of physiological and biochemical characteristics between leaf chlorosis tobacco plants and normal tobacco plants were studied. The result showed that the ratio of dry to fresh weight of chlorosis tobacco leaves were lower than those of the normal ones, the contents of chloroplast pigment were obviously lower in chlorosis leaves than in normal tobacco leaves, the degradation of chlorophyll a was faster than that of chlorophyll b, and the degradation of chlorophyll was faster than that of carotenoid. The contents of malonaldehyde and soluble sugar were higher in chlorosis leaves than in normal tobacco leaves. The differences in soluble sugar were significant, but those of root vitality were not significant, compared with normal tobacco plants. Reducing sugar and nicotine contents were low in stalks of leaf chlorosis tobacco plants, but starch contents were high. The contents of total sugar and the reducing sugar of lower leaves were higher, but nicotine contents were lower in chlorosis tobacco plants than in normal tobacco plants. The differences in protein and total nitrogen contents in the leaves and stalks were not significant between chlorosis and normal tobacco plants.
下載: