Summary
A heat treatment interrupts pollen development in isolated uninucleate microspore cultures of Brassica napus cv. Topas inducing embryogenesis. The mechanisms involved in the switch from gametogenesis to sporogenesis has been studied. The first pollen division occurs without the participation of a preprophase band of microtubules (PPB) which results in a cell plate which degenerates. The cultured microspores subjected to a heat treatment undergo a change in cellular organization and form PPBs in the first microspore division. It is suggested that this PPB formation ensures the stability of the future cell plate a critical step in the initiation of future multicellular structures which lead to embryogenesis.
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© 1994 Springer-Verlag Berlin Heidelberg
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Simmonds, D.H. (1994). Mechanism of Induction of Microspore Embryogenesis in Brassica napus: Significance of the Preprophase Band of Microtubules in the First Sporophytic Division. In: Akkaş, N. (eds) Biomechanics of Active Movement and Division of Cells. NATO ASI Series, vol 84. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-78975-5_34
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DOI: https://doi.org/10.1007/978-3-642-78975-5_34
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