Jia Ping, Gao Ting, Xin Hua
College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China.
ScientificWorldJournal. 2012;2012:187261. doi: 10.1100/2012/187261. Epub 2012 Apr 1.
The types, morphology, distribution, structure, and development process of the glandular trichomes on the leaves of Thymus quinquecostatus Celak had been investigated in this study. Two different types of glandular trichomes were determined in detail, namely, capitate trichomes and peltate ones. Besides, there were distinct differences on morphology, distribution, structure, and development process between the two kinds of trichomes. As the peltate trichome stepping into senium stage, it caved in the epidermis integrally, which was different from the capitate one. The secretion of the capitate trichome contained essential oil, polyphenols, and flavonoids, while, in addition to these three components, the secretion of the peltate one also contained acid polysaccharides. A distinctive difference was also seen in the secretory pathway of the secretion between the two types of trichomes. The secretion of capitate one was extruded through the cuticle of the head cell, but the secretion of the peltate one kept accumulating in the subcuticular space of the head cells until it was released by cuticle rupture.
本研究对地椒叶表面腺毛的类型、形态、分布、结构及发育过程进行了研究。详细确定了两种不同类型的腺毛，即头状腺毛和盾状腺毛。此外，两种腺毛在形态、分布、结构及发育过程上存在明显差异。盾状腺毛进入衰老期时，会整体陷入表皮，这与头状腺毛不同。头状腺毛的分泌物含有精油、多酚和黄酮类化合物，而盾状腺毛的分泌物除了这三种成分外，还含有酸性多糖。两种腺毛分泌物的分泌途径也存在显著差异。头状腺毛的分泌物通过头细胞的角质层挤出，而盾状腺毛的分泌物则在头细胞的皮下空间不断积累，直至角质层破裂释放。
