Guttation And Bleeding
Guttation And Bleeding
Guttation:
It is the loss of water in the form of water droplets from hydathodes(small pores) on the leaf margin of a small herbaceous plant. Plants have hydathodes at the end of the veins, through which this excess water is lost in the form of droplets.
Guttation occurs usually when environmental conditions are such as to check transpiration, particularly during cool nights following hot days when the air is very humid. Drops of water appear along the margins of leaves, usually as a result of exudation through special glands known as hydathodes.
Hydathodes are modified stomata, located at the ends of veins. Unlike stomata, hydathodes remain open througout the day and night.
Bleeding:
The loss of cell sap from an incision made in a plant is called as Bleeding. E.g., Agave, Acer, Vitis. It occurs due to root pressure, phloem pressure, local pressure in xylem (stem pressure) and latex or resin.
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