Changes in Structure and Histochemistry of Glandular Trichomes ofThymus quinquecostatusCelak

Author:

Jia Ping1,Gao Ting1,Xin Hua1

Affiliation:

1. College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China

Abstract

The types, morphology, distribution, structure, and development process of the glandular trichomes on the leaves ofThymus quinquecostatusCelak 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.

Publisher

Hindawi Limited

Subject

General Environmental Science,General Biochemistry, Genetics and Molecular Biology,General Medicine

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