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(Science: plant biology) A haploid spore produced by a plant sporophyte that develops into a male gametophyte. In seed plants, it corresponds to the developing pollen grain at the uninucleate stage. The smaller of the spores of a heterosporous species.

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Why coniferophyta called sporophyte?

... spores. The tree itself is the sporophyte generation. It is called a sporophyte because it produces spores, not because it is a spore. It produces microspores, which are part of the pollen grain, and megaspores, which develop into the egg, antipodal cells, polar nuclei, and synergids. The seed ...

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by aptitude
Mon Oct 10, 2011 4:55 am
Forum: Botany Discussion
Topic: Why coniferophyta called sporophyte?
Replies: 1
Views: 2918

Plants: number of ovules and pollen grains per flower?

since tobacco plant being eusporangiate has more than 128 microspores in each anther.....about the number of ovules in ovary of tobacco,see its placentation....

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by rg
Mon May 22, 2006 5:45 pm
Forum: Botany Discussion
Topic: Plants: number of ovules and pollen grains per flower?
Replies: 1
Views: 2910

Reproduction in Flowering Plants

... begins with:microsporangia or microspore mother cell * is diploid * is found in a pollen sac of the anther * undergoes meiosis * and produces 4 microspores (haploid) o each microspore undergoes mitosis to produce o microgametophytes (pollen grains each with two cells) The pollen grain has a ...

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by chepay118
Sat Mar 25, 2006 2:10 am
Forum: Botany Discussion
Topic: Reproduction in Flowering Plants
Replies: 2
Views: 3281

Conifers which gametophyte

I am not sure about the translations: Ok, so you got the male flower. This This has microsporophiles with microsporanges. These produce microspores- pollen. Each of these microspores is formed of of 2 protalian cells, 1 vegetative cell and one generative cell(4 cells in total). The prothallian ...

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by MrMistery
Wed May 25, 2005 8:25 pm
Forum: Botany Discussion
Topic: Conifers which gametophyte
Replies: 1
Views: 2992

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