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List out the functions of tapetum....

List out the functions of tapetum.

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(i) It supplies nutrition to the developing microspores.
(ii) It contributes sporopoleenin through ubisch bodies thus plays an important role in pollen wall formation.
(iii) The pollenkitt material is contributed by tapetal cells and is later transferred to the pollen surface.
Exine proteins responsible for 'rejection reaction' of the stigma are present in the cavities from tapetal cells.
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