Published on July 2, 2009
Tissues an integrated group of cells with a common structure and function
Plant Tissues n Meristematic tissue: rapid cell division, lengthening of shoots and roots n Dermal tissue: covering for the plant body n Ground tissue: support, photosynthesis, and storage n Vascular tissue: conduction of water, food, and dissolved minerals; strengthens and supports the plant
Meristematic Tissue cells that do not differentiate cells retain the ability to divide Types: Apical – primary growth at root and shoot tips Lateral – secondary growth in trees and shrubs Intercalary – secondary growth in monocot stems
Region of cell differentiation Apical meristem /maturation Region of cell In shoot tips and elongation root tips Allium cepa root tip Region of cell division Apical meristem Root cap
Dermal Tissues Epidermis Single layer of cells called the epidermis in herbaceous plants Guard cells Trichomes Root hairs Functions Absorption Secretion of cuticle Protection Control of gas exchange Cuticle
The Ground Tissue System
Parenchyma cells spherical-shaped cells found throughout plant thin primary walls living, metabolizing tissue functions: Photosynthesis & respiration Storage (starch, oil droplets, water, and salts) Wound healing & regeneration
Collenchyma beneath the epidermis in young stems and in large veins of leaves elongated cells that have unevenly thickened cell walls alive at maturity flexible support system found uniformly throughout the plant
Sclerenchyma structural support two types: fibers – support in wood, bark, leaves, stems sclereids – protection in fruits, seeds, other plant organs primary and secondary cell walls. dead at functional maturity
The Vascular Tissue System
Complex Vascular Tissues Xylem Conducts water and dissolved minerals from the roots Phloem Conducts dissolved food materials, carbohydrates, in solution Continuous throughout plant Support plant body
All 4 types of tissues are present in the root tip
Young dicot stem Young monocot stem
Plant Tissues 1. Meristematic tissue : rapid cell division, lengthening of shoots and roots 2. Dermal tissue : covering for the plant body 3. Ground tissue ...
1. Tissues an integrated group of cells with a common structure and function ; 2. Plant Tissues n ...
Plant Tissues and OrgansFig. 38.6 Fig. 38.4 Figure 35.21 Modular construction of a shoot Basic Plant Morphology
View and Download PowerPoint Presentations on PLANT AND ANIMAL TISSUES PPT. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com ...
Biology-03-Why Do We Fall Ill - ... Presentation 1. by Aman Kumar Tiwary. ... Plant Tissues and the Multicellular Plant Body.
Title: Plant Cells & Tissues Last modified by: Dawn P. Toledo Created Date: 3/27/2006 1:49:30 AM Document presentation format: On-screen Show (4:3)
Title: Plant Cells & Tissues Last modified by: admin Created Date: 3/27/2006 1:49:30 AM Document presentation format: On-screen Show Company: Luther Midelfort
People invited to a presentation do not ... which hormones would stimulate seed germination and plant ... 06.06 Plants cells and Tissues Virtual ...