Question

does coconut show geitonogamy?​

Answer 1

Answer:

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Explanation:

• (i) White kernel of Coconut is a free nuclear endosperm.
• (ii) I'm not dioecious plants, autogamy is prevented but geitonogamy occurs.
• (iii) Cleistogamous flowers are always self pollinated.
• (iv) Castor is an endospermic seed

Answer 2

Answer:

Coconut palms are believed to be largely cross-pollinated, although most dwarf varieties are self-pollinating.

So mostly Coconuts show Xenogamy and a few dwarf varieties show Geitonogamy.

In dioecious plants, autogamy is prevented but geitonogamy occurs. Example Maize.

Explanation:

Coconut is a seed propagated crop and knowledge on its flowering and pollination biology will be of significance for optimizing the pollination techniques and also to design efficient conservation strategies in gene banks. Coconut palm is monoecious, with inflorescence bearing both staminate and pistillate flowers. The male flowers are the first to open, beginning at the top of each spikelet and proceeding towards the base. The male phase is followed by female phase and in tall varieties there is a gap between these two phases within the same inflorescence. Although both wind and insects bring about pollination, insect pollination is more predominant. Strategies for employing honey bee colonies in coconut plantations and seed gardens for enhancing pollination and fruit set are discussed. Future lines of work with regard to pollination biology aiming increasing fruit set in coconut seed gardens are also pointed out.

Coconut has free nuclear endosperm. During the development of a nuclear type of endosperm, the primary endosperm mother cell divides by free nuclear divisions, and these divisions are not followed by cell wall formation. Thus, the free nuclei remain in the cytoplasm of the embryo sac. These nuclei now arrange themselves towards the periphery of the embryo sac and centripetal wall formation occurs that finally leads to a cellular type of endosperm. Thus, the kernel of coconut is cellular endosperm.

Dioecious plants have unisexual male and female flowers on different plants i.e. a plant may have either male flowers or female flowers but not both. Dioecious plants prevent Autogamy which is the transfer of pollen from the anther to the stigma of the same flower, as only unisexual flowers are there. Also, Geitonogamy which is the transfer of pollen from the anther to the stigma of another flower on the same plant is prevented because male and female flowers are not present on the same plant.