PLANT TISSUES

`

PLANT TISSUES are GROUPS OF DIFFERENTIATED CELLS forming LAYERS WITH SPECIALISED FUNCTIONS

  • Can be formed from ONE OR MORE TYPES OF CELL
  • PRIMARY TISSUE results from growth at the APICAL MERISTEMS (stems and roots)
  • SECONDARY TISSUE result form growth at the LATERAL MERISTEMS (CAMBIUM in stems and roots) * Results in SECONDARY THICKENING in WOODY PLANTS * Secondary growth also occurs in many nonwoody plants, e.g. tomato,[1] potato tuber, carrot taproot and sweet potato tuberous root. * A few long-lived leaves also have secondary growth * Secondary growth Credit: de:Benutzer:Griensteidl - Cehagenmerak [Public domain], via Wikimedia Commons (to be relabelled)

enter image description here

Woody dicor stem secondary phloem Credit: Berkshire Community College Bioscience Image Library [CC0], via Wikimedia Commons

Secondary growth in tree Credit: Brer Lappin [Public domain], from Wikimedia Commons