Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download Ground or Fundamental Tissue System
Document related concepts
no text concepts found
Transcript
Parenchyma Ground or Fundamental Tissue System Types of Ground Tissue Parenchyma Collenchyma Sclerenchyma Aerenchyma in papyrus Parenchyma Characteristics? Living cells Thin, primary cell wall Large vacuoles and thin band of cytoplasm Store starch, oils, tannins crystals Where is it found? Cortex of stems and roots Pith of stems Mesophyll of leaves Parenchyma – special types & functions Synthetic – chlorenchyma cells in leaf Meristematic – apical meristems Secretory – glands and nectaries Structural - aerenchyma Boundary - epidermis & endodermis Transport - transfer cells 1 Leaf & Root Parenchyma Specialized Parenchyma - Aerenchyma Epidermis parenchyma Palisade mesophyll parenchyma Spongy mesophyll parenchyma Aerenchyma in water lily petiole Root cortex parenchyma Aerenchyma in mare’s tail (Hippuris) Hippuris (mare’s tail) Collenchyma Examples of Collenchyma • • • • Living cytoplasm Unevenly thickened primary cell walls Usually just beneath the epidermis Function: flexible support 2 Sclerenchyma Collenchyma Sunflower stem Characteristics of sclerenchyma Cells dead at maturity Thick secondary cell walls Lignified cell walls Petiole of Celery Petiole of Celery Sclerenchyma Sclerids Types of sclerenchyma Sclerids or stone cells - isodiametric Fibers – very long sclerenchyma cells lignin Sclerenchyma: Fibers 3 Sclerenchyma: Fibers Ground or Fundamental Tissue System Types of Ground Tissue Parenchyma Collenchyma Sclerenchyma Tilia phloem fibers Zea leaf END Ground Tissue 4
Related documents