短命植物舟果荠形态学研究：1.营养器官的解剖构造

本研究采用石蜡制片法,观察到舟果荠有适应特殊环境的结构特点。它的根系分布在土壤的表层。根的次生木质部导管直径大。根、茎、叶中都有大型的薄壁细胞。茎和叶的表皮细胞外壁还有角质层。叶肉主要为栅栏组织。主脉上表皮内侧和茎的皮层细胞都有叶绿体。它属四碳(C_4)植物型。根以皮层木栓化,代替表皮。在茎的维管束之间有厚壁细胞。根的皮层从初生构造到次生构造,只是体积长大而无数量增加。根、茎、叶中无贮藏的营养物质。

A Study of Morphology of Short-Lived Plant Tauscheria lasiocarpa Fisch. ex DC. 1. Anatomical Structure of the Vegetative Organ

Root system of the plant spread shallow in the surface soil. the secondary xylem of root has large vessel diameter. there are large parenchyma cells in the root, stem and leaf. The outer wall of epidermal cells of stem and leaf has the thicker cuticle. The mesophyll mainly consists of palisade tissue. It contains smaller in size but larger in number chloroplast. There is also chloroplast in the parenchyma cells inside the upper epidermis of the main vein and the parenchyma cells of cortex of stem. There is larger chloroplast in bundle sheath cells of lateral veins. It belongs to four-carbon plant. The cortical corkification of the root replace epidermis. The stem has the sclerenchyma cells between the vacular bundles. From primary structure to secondary structure of the root, the number of cortical cells remains almost the same but their size increases. vegetative organ of the plant does not store nutrient substance. Its inside structure is simpler.