TY - BOOK AU - Periasamy,K. TI - MORPHOLOGICAL AND ONTOGENETIC STUDIES IN PALMS. 11. GROWTH PATTERN OF THE LEAVES OF COCOS NUCIFERA AND BORASSUS FLABELLIFER AFTER THE INITIATION OF PLICATIONS N2 - Growth of the young leaf prirnordium into the adult leaf involves the operation of three types of tissue growth which may be designated as perpetuative growth, differentiative growth, and generative growth. In the first one, the tissue is perpetuated as such without histological differentiation into another, and the size of its cells is maintained constant so that growth in volume is due to increase in the number of cells. In the second, the tissue differentiates histologically into another, and growth is due to increase in the size of cells without increase in their number. The larger cell size thus attained enables the tissue to reduce the number of divisions necessary for subsequent growth of the first type. In the third, the size of the cells is reduced by rapid divisions and this is accompanied by the internal genesis of a new tissue within an already differentiated one UR - https://drive.google.com/file/d/1mu4O5nQsotBylNE3Up4zUop2lTAV49sg/view?usp=drivesdk ER -