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广藿香2种表皮毛的发育解剖学研究 被引量:8

The Developmental Anatomy of Two Kinds of Trichomes in Pogostemon cablin
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摘要 通过石蜡切片及扫描电镜观察发现:广藿香的茎、叶上密集分布着腺毛和非腺毛2种表皮毛,二者的外部形态及发育过程明显不同.根据腺毛头部形状可把腺毛分为盾状腺毛和头状腺毛,二者均发生得很早,它们的原始细胞都来源于原表皮,一般在茎尖第1和第2片叶原基的原表皮细胞以及茎的1~2节间原表皮细胞中开始发生.其发育过程可分为原始细胞形成期、基细胞形成期、柄细胞形成期和头部的形成4个阶段.非腺毛的发生晚于腺毛,但发生时期却较长.它一般在第2对幼叶上开始发生,而且在成熟叶和具初生结构茎上也可发生、发育.原始细胞产生后,开始进行平周分裂,形成基细胞核头部细胞,头部细胞经一次或多次分裂发育形成非腺毛的数个子细胞. There were flourishing trichomes on the epidermis of Pogostemon cablin's stem and leaf, and they also have distinct difference in shape and development stage. According to the shape of head, the glandular hairs were divided into capitate and pehate glandular hairs. They all occurred very early and their initial cells came from protoderm, which usually originated from the first and second primordium or 1-2 internode of stem. Their developmental process may be divided into four stages, i.e. primitive cell stage, basal cell stage, stalk cell stage and apical cell stage. The origination of non-glandular hairs was later than that of glandular hairs, but lasting origination time in the former was longer than that in the latter. Non-glandular hairs usually started to occur in the secondary immature leaf, and also continue to occur in mature leaves and stems. After initial cells formed, they began to periclinal division to develop into basal cell and head cell. Head cell also began to periclinal division (once or more) to develop into the composing cells of non-glandular hairs.
出处 《华南农业大学学报》 CAS CSCD 北大核心 2006年第1期88-91,116,共5页 Journal of South China Agricultural University
基金 广东省中医药管理局基金项目(F01032) 广东省科技计划项目(2002C20147)
关键词 广藿香 腺毛 非腺毛 发育 Pogostemon cablin glandular hairs non-glandular hairs development
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