Study on the morphology of the glandular hairs of the flue-cured tobacco

In order to learn the morphological characteristics of all kinds of glandular hairs and the relationship between the glandular hairs and the quality of tobacco,morphological characteristics of glandular hairs of four kinds of the flue-cured tobacco were observed by water loading method,paraffin section method and scanning electron microscope method.The results show that all kinds of glandular hairs include base,handle and head.The kind of glandular hairs includes long trichomes(including single cell and multicellular gland head),short ones and epidermal hair.Long and short trichomes are originated from protoderm cell on the leaf primordium.There is no differentiated difference between the long trichome and short one of the initial glandular cells.The differentiation of two types of glandular occurs in the initial stages of the formation of glandular head.Long ones are dominate hairs on the surface of leaf while short trichomes which develop later with steady quantity cannot be ignored.At the early and mid-intaked time,the quality of flue-cured tobacco mainly depends on the long glandular hairs.But in the late intaked time,it mainly depends on the short ones.