文档介绍：Structures, distribution and function in
Tissues of Plants
第二节 植物组织结构、分布与功能
The plant body consists of integrated structures called organs, (器官）such as roots, stems, leaves, petals etc. which in turn are made of tissues.
Concept: Tissues are cell complexes which are similar in origin and structure, and are of same functions.
Tissues may be simple (consisting of one cell
type only) as parachyma (薄壁细胞）, collenchyma
（厚角组织）or sclerenchyma (厚壁细胞）, or
complex (consisting of two or more cell types) as
in the case of epidermis （表皮）, xylem（木质部）
and phloem（韧皮部）.
Simple tissue
简单组织
Complex
tissues
复合组织
Plants consist of four basic kinds of
Tissues systems:
Meristematic 分生组织
Ground 基本组织（薄壁与机械）
Dermal 保护组织
Vascular 输导组织 Conducting tissue
Secretory structure 分泌结构
Mature tissues 成熟组织
1. Meristem 分生组织
A specialized
regions of active
cell division
called meristem,
Including:
按位置分：
Apical meristem
顶端分生组织
Lateral meristem
侧生分生组织
Intercalary meristem
居间分生组织
According their origin and characters 按来源与性质分, including:
promeristem
原分生组织
primary meristem
初生分生组织
secondary meristem
次生分生组织
Apical meristems
Secondary meristem
次生分生组织
Secondary meristem cells are derived from mature Parenchyma cells ( 薄壁组织细胞）.
2. Mature tissues 成熟组织
. Parenchyma cells have thin primary walls
薄壁组织
Ground tissues （基本组织） are typically
parenchyma. Many parenchyma cells are
Isodiametric (等径的）.
A transverse section
（横切面）of corn (Zea
mays) internode showing
ground parenchyma in
which vascular bundles
are embedded.
Shown here are
potato tuber
(Solanum sp.)
parenchyma cells
The cells show
small intercellular
spaces (细胞间隙）
between them.
Parenchyma 薄壁组织
1) Absorptive tissue 吸收组织
Epidermis and root hairs in root hair region