Define Tube nuclues and Genetrative nucleus.
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tube nucleus One of the two nuclei produced when the haploid nucleus of a pollen grain divides by mitosis (compare generative nucleus). The tube nucleus is thought to control growth of the pollen tube.
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➡the one of the two nuclei formed by mitotic division of a microspore during the formation of a pollen grain that is held to control subsequent growth of the pollen tube and that does not divide again — compare generative nucleus.........
➡the one of the two nuclei resulting from the first division in the pollen grain of a seed plant that gives rise to sperm nuclei — compare tube nucleus......
➡generative nucleus One of the two nuclei in an angiosperm pollen grain (compare tube nucleus). It divides to produce two male gamete nuclei (see double fertilization)......
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