question_answer 93)

  In the figure given below the plant bears two different types of flowers marked 'A' and 'B'. Identify the types of flowers and state the type of pollination that will occur in them.

Answer:

                    In the figure given below the plant bears following two types of flowers A?Chasmogamous flower (the flowers remain open, exposing anthers and stigmas). B?Cleistogamous flowers (the flowers remain closed, so that anthers and stigmas are never exposed) following are the types of pollination that will occur in these flowers. (i) Autogamy (within same flower) (ii) Geitonogamy (different flowers of same plant) (iii) Xenogamy (different plants) It is a case of cleistogamy (a type of autogamy) in which some plants, like, Commelina bengalensis possess both Chasmogamous and cleistogamous flowers. In Chasmogamous flowers, the flowers may undergo self-pollination or cross-pollination,while in cleistogamous flowers, the flowers undergo only self-pollination.