write short note on modifications of leaf
Answers
Explanation:
A)Leaves are the part of a plant that contains chlorophyll and carries out the process of photosynthesis but sometimes it got modified to perform various functions. They are:-
Tendrils-present in climbers and help them to climb as seen in pea.
The phyllode-green expanded structure formed by the modification of petiole or rachis and carry out photosynthesis as seen in Acacia.
Leaf pitcher- modified into a lid like structure and helps in capture seeds to fulfill nitrogen deficiency as seen in Nepenthes.
B)The stem is the part of a plant that grows above the ground and provides support to the plant but gets modified to help plant in various functions. They are:-
Thorn- The axillary buds of some plants become arrested and get modified into the stiff, sharp and pointed structure for reducing transpiration and protection as seen in Citrus.
The phylloclades-the stem of xerophytes to carry out photosynthesis as their leaves are reduced to prevent transpiration as seen in Opuntia.
Cladodes-The stem and branches modified to carry out photosynthesis as in Ruscus.
C)Root is the part of a plant that grows underground and performs the function of absorption sometimes modified to perform various functions. These are:-
Storage as in carrot and radish.
Support as in sugarcane and Banyan.
Fulfill requirement of oxygen as in Rhizophora.
Photosynthesis as in Trapa.
Explanation:
Leaves can be modified in the form of spines that reduce water loss and also act as a defence. Some are modified into tendrils to provide support to the plant. Some leaves are thick that help in water storage. Some are modified to catch and digest insects...