In general, the purely mechanical effects of the pubescence depend on four main characteristics of the trichomes: density, erectness, length, and shape.
一般来说，柔毛的机械作用取决于毛状体的四个主要性状：密度、直立性、长度和形状。
This text reports the tracks of studying to the shape and density of gland trichomes for 11 different genotype of flue﹣cured tobacco in mature period.
为提供优质烤烟新品种选育中提高香气质和香气量的依据，对中国11个烤烟品种定型叶片的腺毛密度和在成熟过程变化的规律进行了跟踪研究。
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