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Discuss the mechanisms responsible for polarity acquisition in lateral organs of plants. What evidence supports your views?
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Discuss the mechanisms responsible for polarity acquisition in lateral organs of plants. What evidence supports your views? Plant development is based on the formation of modular sections, lateral organs are formed in a reiterative pattern from the periphery of the shoot apical meristem (SAM). Te establishment of polarity in the lateral organs is essential for asymmetric development and research to date indicates it involves both intrinsic and extrinsic factors. Molecular studies have revealed genes are thought to assist in establishing this polarity with many of them being spatially localised transcription factors. In this essay I shall describe a proposed model of organ polarity acquisition and support this with evidence from experiments that have been performed. Lateral organ development starts with the formation of the SAM. Initially formed during embryogenesis the SAM is the progenitor of the above ground portion of the plant. In order to achieve this the SAM must serve...
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