不同烤烟品种成熟过程中各类腺毛密度的变化

Research on the Shape and Sensity of Gland Trichomes of Flue﹣Cured Tobacco in Differents Mature Periods

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.结果表明:不同烤烟品种的长柄腺毛、短柄腺毛和无头腺毛的比率存在较大的差异;各烤烟品种上表皮腺毛的密度均低于下表皮,上表皮腺毛的无头腺毛所占比率高于下表皮,并且随着烟叶进入适熟期,叶片表面腺毛和腺头的萎缩、衰老、脱落的速率也随之加快,这种变化在不同品种间的差异十分明显.

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.Results indicate that much more difference of percentage is present among long handle trichomes, short handle trichomes and non gland trichomes of different tobacco genotypes;the trichomes density of the upper epidermis for each flue﹣cured tobacco species is lower than the lower epidermis and the percentage of non head gland trichomes is higher than the lower epidermis.With entering technical mature period,superficial gland trichomes and gland heads of tobacco leaf speed up withering,consenescence and coming off. The difference of this kind of change among different species is obviously.