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Concept of sexuality in plants.

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Concept of sexuality in plants.

Postby pavankasi » Tue Jul 30, 2013 11:28 am

Hi,

I just have a very basic question. I was wondering about sexuality in plants. Are all plants present as Male and Female? I do know that some plants are hermaphrodites, so they have both male and female parts. Are there any plants that have no concept of Male and Female, i.e - There is no fertilization involved at all, and all parts of the plant are asexual? I was also wondering, if seeds have a gender? If they do, within the same fruit, is it possible to have both male and female seeds?

Thanks in advance.
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Postby Darby » Thu Aug 01, 2013 3:08 pm

Gender refers to roles in sexual reproduction. The male-female pair (there are a lot of other gender mixes, but I think advanced plants are exclusively m/f) connects to the gametes involved (the parts are secondary to that), with one cell (unless you're a dicot) specialized to accumulate food for the offspring. In many plants, individuals produce both types of gametes. Some are asexual, especially highly-modified crop plants.

When plants have separate gendered individuals, there seems to be a variety of ways to "set" that (as is true with animals), a lot of which would NOT be determinate in the embryos. In plants that use sex chromosomes, seeds would have genders, and just as animals produce litters of males and females, fruits should work the same way.
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Postby aiza » Wed Aug 28, 2013 5:43 am

My bontany book also says pteridophyta. But many things are spelled differently in different countries. Despite this, I would expect something like this to be spelled the same everywhere because it is latin, no?
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Postby JackBean » Wed Aug 28, 2013 2:10 pm

Actually, the plant per se is sporophyte which is diploid and gives rise to haploid spores, which are the pollen and ovules. However, mostly plants contain both "sexes".
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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