seedling fruits

Plants!

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hiro
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seedling fruits

Post by hiro » Fri May 19, 2006 12:08 pm

how come some plants producing parthenocarpy (seedling), without fertilization? this will only waste their energy to produce those fruit for nothing..right? no seed=no embryo..i think...so..y?

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Post by SU_reptile » Thu May 25, 2006 10:30 pm

Well, I must say thet this is a good point. I was thinking about it but I had no idea what for plants undergo parthenocarpy. I made some research and found information that (in nature) this is a defect caused for example by mutation. As you said/ wrote this is useless, since plants waste energy and loose opportunity to reproduce sexually (so that no descendant occurs).
However, I believe you are aware of parthenocarpy being highly positive phenomenon used in horticulture or friut farming. I am sure there are lots of people prefering grapes or tangerines without pips (hope it is a good word for those seeds :wink: ).

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Post by baikuza » Fri May 26, 2006 8:55 am

how if there is no sperm that come into it... should it-flower-die without doing any fertilization.

maybe it is better than not doing anything. once it make flower, should it die without get any aim? :wink:

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Post by hiro » Wed May 31, 2006 7:07 am

haha SU r're right~ that's good for us to eat seedless...but for us..human only....hehee
i think this is not common in nature...rite? they seem they don't complete their lifecycle ....

kuza: well...i guess that is more wasteful to produce fruit without seed(s)...
y don't they provide more nutrients to grow vegetatively (taller) or growth more flowers or leaves whatever useful parts? rite ;)?

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Post by MrMistery » Thu Jun 01, 2006 6:18 pm

Ok, here are possible reasons: some plants, produce a seed with a fruit entirely by mitosis(asexual reporduction). However, they still produce fruits to have the advantage of dispersal.

Ever wondered how a plant knows fertilisation has occured? Well, some people did, and they found the answer. the plant gives the signal by short bursts of auxin and other hormones&growth reglators. By spraying artificial auxin and giberelins on plants, farmers can make plants produce big and yummy fruits without seeds.
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Post by victor » Fri Jun 02, 2006 3:42 am

Well, I can say that some plants undergo parthenocarpy/apomyxis because of some mutations occur in the ovulum chamber (at least that's what I learned from my college, :lol: ).

In normal pathway, 1 macrospore will do a meiosis and resulting 4 haploid cells which followed by degeneration of 3 cells and the remaining is just only 1 cell. Then this cell will do a caryokinesis 3 times to form 8 nuclei and so on.....until there's a fertilisation by sperms.

Well, in parthenocarpy there're many factors such as mutation on the first meiosis, sperm fertilisate antipods so ovum then develop without sperm, and others.

It have to be noticed that a fruit resulted from pathenocarpy still have seed, but inside the seed there's no embryo.
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Post by MrMistery » Fri Jun 02, 2006 5:39 pm

Ever buy Thomson seadless grapes from the market?
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Post by victor » Sat Jun 03, 2006 3:56 am

Ohh, I like Grapes..:lol: and honestly, I've never been buy that seedles thing because usually I eat grapes together with the seeds..:lol:
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Post by baikuza » Mon Jun 05, 2006 10:49 am

hei, do not you know that most of banana fruit do not have any seed in it.

and others is the same. do not have the seed, in some case. hm... maybe salak. some of the fruit do not have seed.(just rise in my head, but not with a long time to think. so, i'm not sure it is a good example, but not so bad too.) :)

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Post by victor » Mon Jun 05, 2006 11:33 am

You have to aware about it's division which is Magnoliophyta which means "flowering plant"....so?:wink:
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Post by baikuza » Tue Jun 06, 2006 12:01 pm

banana has flower, either salak.
so?

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Post by hiro » Thu Jun 08, 2006 3:43 pm

haha victor~ u r so poor...u buy all seed grapes~~
o..then tatz quite obivous to find the non fertilized ovary in watermelon~ milky colour i think..
will u eat watermelon with seeds together, victor? haha tats will be v. troublesome~~

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