transport in plants Flashcards
Why do plants need a transport system?
-meeting metabolic demands
-large size
-small SA:V ratio
Chlorenchyma
cortex is made of chlorenchyma
Schlerenchyma
cap that protects the phloem
Parenchyma
packing cells
What is a cotyledon?
A significant part of the embryo within the seed of a plant
-usually becomes the embryonic first leaves of a seedling upon germination
-the number of cotyledons can be used by botanists to classify the flowering plants (angiosperms)
Where is the cambium located?
in between the phloem and xylem layers
Phloem location
on the outside in roots and stems but underneath in the leaf
Xylem location
on the inside in roots and steps but on top in leaves
Characteristics of a monocot
-one cotyledon in seed
-flower parts in threes or it’s multiples
-vascular bundles scattered in stem
-parallel leaf veins
Characteristics of a dicot
-two cotyledons in seed
-flower parts in fours,fives or their multiples
-vascular bundles in a definite ring
-leaf veins form a net pattern
Mechanism of water transport from roots through plant
-water is lost by evaporation/transpiration
-Water moves by the symplast and Apoplast pathways
-up stem by cohesion-tension/ root pressure/ capillary action
-water loss reduces the water potential of leaf cells
-water moves from higher water potential to lower water potential down the water potential gradient through the symplast pathway by osmosis through plasmodesmatap