Abstract: Seed evolution is often presented as the evolution of morphological complexity. Following the steps of Wilhelm Hofmeister, I argue that changes in the development of one tissue, the megasporangium/nucellus, can explain the origin of the seed habit. Here, I lay down a 'simpler' story that correlates seed evolution to nucellus cell fate. Seed evolution is often presented as the evolution of morphological complexity. Following the steps of Wilhelm Hofmeister, I argue that changes in the development of one tissue, the megasporangium/nucellus, can explain the origin of the seed habit. Here, I lay down a 'simpler' story that correlates seed evolution to nucellus cell fate. the tissue of an ovule or a seed in between the funiculus and nucellus that originates the integuments. seed that develops a large endosperm at the expense of the nucellus. the female gamete-producing generation originating from the megaspore. a stalk connecting an ovule or a seed with the placenta. refers to the generally haploid, gamete-producing generation. the development of two kinds of spores, microspores and megaspores. the development of a single kind of asexual spore. the external protective cell layers of an ovule or a seed. synonym of nucellus generally used for non-seed plants. nucellus cell undergoing meiosis, thus producing four megaspores. the most distal tissue of an ovule primordium where megaspore production occurs. seed that develops a large perisperm (nucellar tissue) at the expense of the endosperm. refers to the generally diploid, spore-producing generation.
Publication Year: 2018
Publication Date: 2018-06-28
Language: en
Type: review
Indexed In: ['crossref', 'pubmed']
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Cited By Count: 10
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