烤烟腺毛的形态学观察和密度研究

为了开展烤烟品种间的腺毛形态和腺毛密度的规律性研究，以7个烤烟品种为试验材料，在扫描电子显微镜和光学显微镜下对烤烟腺毛的形态进行了观察，并对腺毛的数量和分布进行了统计、分析和研究。结果表明，烤烟腺毛根据柄细胞的数量分为长柄腺毛和短柄腺毛，长柄腺毛是烤烟叶片表面的优势腺毛，短柄腺毛的发生较晚、数量稳定，其头部分泌细胞体积小、数量较多。7个烤烟品种中除‘龙江911’以外均表现为下表面的腺毛密度大于上表面的腺毛密度，烤烟叶片下表面的腺毛密度更能反映出品种的腺毛密度特征。长柄腺毛在烤烟叶片腺毛总体中所占的比例远大于短柄腺毛，对叶片腺毛总体密度的影响最大；短柄腺毛虽然所占的比例相对较小，但是其对烟叶香气的贡献是不可忽视的。腺毛密度在不同的烤烟品种间具有一定的特征性，按照叶片上、下表面的腺毛密度平均值排列顺序是：‘吉烟7号’>‘龙江915’>‘龙江851’>‘K346’ >‘NC89 ’>‘龙江911’>‘CF978’。

Study on the Morphology and Density of the Glandular Hairs of the Flue-Cured Tobacco

To investigate the tobacco varieties, this paper regularity of morphology observed morphological and density of the glandular characteristics of glandular hairs of different flue-cured hairs of seven kinds of the flue-cured tobacco by scanning electron microscope and optical microscope and made a research on quantity and distribution of glandular hairs. The results showed glandular hairs of the flue-cured tobacco included long trichomes and short ones according to the quantity of stalk cell, which short trichomes developed late with steady quantity and the secretary cells in the head was small with large amounts while long ones was dominate hairs on the surface of leaf. The trichome density on the down surface, which could more reflect the features of glandular hairs, was higher than the up surface for 7 kinds of flue-cured tobacco except Longjiang 911. Long trichomes which had a greater proportion of the glandular hairs had the biggest influence on the overall density of the trichomes, but the short＇ s contribution to the aroma of tobacco should not be neglected. The trichomes density between different flue-cured tobacco had certain characteristic, the average sequence of up surface and down surface of trichomes density was Jiyan 7〉 Longjiang 915〉 Longjiang 851〉 K346〉 NC89〉 Longjiang 911 〉CF978.