The Effects of Climate,Soil and Cultivar on the Content of Surface Trichome Exudates from Fresh Flue-cured Leaves

气候、土壤和品种对烤烟鲜叶表面腺毛含量影响（英文）

[Objective] The aim was to study the effect of climate and soil on the content of surface trichome exudates from fresh flue-cured leaves. [Method] The experiment was conducted in 2009 in Longgang, Weining and Tianzhu of Guizhou Province with flue-cured tobacco variety Yun 85. Mature tobacco leaves were taken from lower, middle and upper plant positions respectively and major cuticular com-ponents of the leaves were extracted with methylene chloride and their chemical compositions were analyzed with GC-MS. [Result] The result showed that there was large difference among trichome exudates of leaves grown under different climatic conditions. The leaf trichome exudates from Tianzhu were quite higher than those from Weining and Longgang, and trichome exudates difference between Tianzhu and Longgang was significant. Soil conditions had considerable effect on the content of tobacco leaf surface trichome exudates, leaf from Longgang soil had highest con-tent, fol owed by Tianzhu soil leaf, Weining soil leaf had lowest content. Under vari-ous climatic conditions, the contents of leaf trichome exudates of same soil were in-consistent, indicating the presence of certain climate and soil factor interaction; The contents of leaf trichome exudates from four cultivars in Longgang showed large difference, Nanjiang 3 was the lowest, fol owed by K326, Guiyan 201 was high, and Yunyan85 the highest. The content of leaf trichome exudates of Yunyan85 was more than two times of that of Nanjiang 3. [Conclusion] The Effect of climate factor on the content of leaf trichome exudates was greater than that of cultivar, which was then larger than soil condition.

[目的]探究气候、土壤条件和品种对烟叶腺毛分泌物的影响。[方法]在贵州省开阳龙岗、威宁和天柱三地,选择云烟85烤烟品种,分下中上3个部位采取成熟鲜叶,用二氯甲烷提取叶表面物质进行分析检测。[结果]气候条件对烟叶腺毛分泌物主要成分含量差异明显。天柱烟叶腺毛分泌物主要成分含量明显高于威宁和龙岗,天柱与龙岗主要腺毛分泌物总量差异达到最著水平;土壤条件对烟叶腺毛分泌物含量影响较大,龙岗土壤上烟叶腺毛分泌物含量最高,天柱土次之,威宁土最低。在不同气候条件下,各种土壤上烟叶腺毛分泌物含量不一致,说明气候和土壤间存在一定的互作。在龙岗点选取不同品种鲜叶分析检测表明,品种间鲜叶腺毛分泌物含量亦存在较大差异,南江3号最低,K326次低,贵烟201较高,云烟85最高。云烟85鲜叶腺毛分泌物含量是南江3号烟叶含量2倍多。[结论]气候、土壤和品种对烟叶腺毛分泌物含量的影响程度依次为气候>品种>土壤。