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  4. Nuclear endosperm has :

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Q. Nuclear endosperm has :

Delhi UMET/DPMTDelhi UMET/DPMT 2006

Solution:

During the development of nuclear endosperm, the primary endosperm nucleus divides repeatedly without wall formation i.e., produce large number of free nuclei. The multinucleate cytoplasm undergoes cleavage and gives rise to multicellular tissue, e.g., Maize, wheat, rice, sunflower etc. During the development of cellular endosperm, the primary endosperm nucleus divides followed by wall formation. Therefore, endosperm become cellular from beginning. e.g. Balsam, Datura, Petunia etc. During the development of helobial endosperm, the first division of primary endosperm nucleus is followed by transverse wall formation and micropylar and chalazal cell are formed. These two cells now develop like the nuclear endosperm development.