Pollen wall development may be considered under exine and intine growth phases. 1. Exine Growth Phase: After meiosis of microsporocyte (microspore mother cells) the tetrads of haploid microspores are enveloped by a callosic wall. The callose wall can be detected around the microspore mother cells during initiation of meiosis (Fig. 2.1a and 2.2a). It forms […]
Phases of Pollen Wall: Exine and Intine | Palynology
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