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 senorcafe
pass the wasabi
Registered: 09/23/11
Posts: 1,059
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 Re: dominant/recessive properties on Psi. cubensis [Re: metacohl]
#15741949 - 01/31/12 08:42 AM (3 months, 27 days ago) |
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from reading that i was thinking about senescence
orginisms die because (at least i read and think) everytime DNA replicates and or crossing over occurs tiny frgaments of the chromosomes become damaged. when being copied multiple times the DNA damages and we start to have weak bones hard breathing poor eyesight etc.
so since mycelium copy their haploid DNA and keep replicating it and advancing through a substrate its damaging its DNA when it turns dikaryotic it allows the mycelium extra information to keep on trucking.
eventually the dikaryotic mycelium replicates and damages its DNA to the point it dies / senecences's (lol sssssss)
and yes i wouldnt mind a pro chimeing in with a lecture
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hallucigens dont cause psychedelics, psychedelics cause hallucinations
if you can you should -senorcafe
im so stoned i could eat kitty litter because its crunchy-glenn brace
little brown mushroom-so hard to identify-look alikes common
varied habitats-the mycophile wonders-edible deadly
underneath blue sky-you spread from grass to tree line-popping up when rains
little brown mushroom-maybe one day i shall know-who you really are
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sof4r0ckeRs1984
Alice and Bob
Registered: 07/30/10
Posts: 1,338
Loc: so fa away 
Last seen: 1 month, 16 days
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Re: dominant/recessive properties on Psi. cubensis [Re: senorcafe]
#15742983 - 01/31/12 01:25 PM (3 months, 27 days ago) |
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But that's just your own thoughts, not science, isn't it?
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The Horrors... Really bad example of dosage, set and setting.
[quote]starfire_xes said:
Don't worry about being ugly. Beauty is only skin deep.
Ugly goes all the way to the bone....
[/quote]
Tired of PF-Tek? Swwerts Whole Brown Rice Cakes Pictorial
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senorcafe
pass the wasabi
Registered: 09/23/11
Posts: 1,059
Last seen: 3 hours, 20 minutes
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Re: dominant/recessive properties on Psi. cubensis [Re: sof4r0ckeRs1984] 1
#15743319 - 01/31/12 02:47 PM (3 months, 26 days ago) |
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it my thoughts being a science major
and just read/took exam on DNA RNA transcriptions
my proffessor described the breaking down of DNA and how it causes aging and organ failure overtime
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hallucigens dont cause psychedelics, psychedelics cause hallucinations
if you can you should -senorcafe
im so stoned i could eat kitty litter because its crunchy-glenn brace
little brown mushroom-so hard to identify-look alikes common
varied habitats-the mycophile wonders-edible deadly
underneath blue sky-you spread from grass to tree line-popping up when rains
little brown mushroom-maybe one day i shall know-who you really are
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 Mycelio
Stranger
Registered: 06/24/08
Posts: 1,431
Loc: Berlin
Last seen: 24 seconds
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Re: dominant/recessive properties on Psi. cubensis [Re: senorcafe]
#15743729 - 01/31/12 04:23 PM (3 months, 26 days ago) |
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I think your theory misses a couple of important points. There are repair mechanisms, counteracting the replication errors you cited. Of course errors will still pile up over time, but not too fast. Epigenetic errors (faulty activation/deactivation of genes) may also play a role. Then there are telomeres, limiting the number of possible cell divisions, which may be most important for senescence.
Anyway, be aware that fungi generally do not read textbooks and so most species do not follow the standard example of the fungal lifecycle. They have developed all sorts of tricks, like producing asexual spores. By fusing with hyphae from them, they introduce fresh, young, otherwise identical nuclei into the hyphal network. Also you wont find many dikaryotic mycelia in reality, usually they are heterokaryotic, having more than two types of nuclei traveling though the network. Aged nuclei will be replaced by fresh ones.
Being an amateur mycologist, I am pretty sure there are many more details, which I don't know of yet.
Carsten
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senorcafe
pass the wasabi
Registered: 09/23/11
Posts: 1,059
Last seen: 3 hours, 20 minutes
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Re: dominant/recessive properties on Psi. cubensis [Re: Mycelio]
#15744335 - 01/31/12 06:40 PM (3 months, 26 days ago) |
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DNAs repair system is pretty sound i do agree. but i was poking at the end of chromosomes (telomers) which over time deterioate due to replicating and just being in "the enviroment".
so dikaryotic is when the two nuclei become one? and heterokayrotic are when both nuclei are present?
lets say i had a skin cell that was heterokaryotic(nuclei from dad and one from mom) how would the cell know which genes to express from which nucleus? one would say store vitamin d while the other would say replicate. or would they work in sync because they recieve the same messages and hormones.
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hallucigens dont cause psychedelics, psychedelics cause hallucinations
if you can you should -senorcafe
im so stoned i could eat kitty litter because its crunchy-glenn brace
little brown mushroom-so hard to identify-look alikes common
varied habitats-the mycophile wonders-edible deadly
underneath blue sky-you spread from grass to tree line-popping up when rains
little brown mushroom-maybe one day i shall know-who you really are
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sof4r0ckeRs1984
Alice and Bob
Registered: 07/30/10
Posts: 1,338
Loc: so fa away
Last seen: 1 month, 16 days
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Re: dominant/recessive properties on Psi. cubensis [Re: senorcafe]
#15746025 - 02/01/12 04:07 AM (3 months, 26 days ago) |
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Well I don't know about heterocaryotic, but dicaryotic is not when they unite. (Dicaryotic = gr. having two cores)
You mean Diploid.
--------------------
The Horrors... Really bad example of dosage, set and setting.
[quote]starfire_xes said:
Don't worry about being ugly. Beauty is only skin deep.
Ugly goes all the way to the bone....
[/quote]
Tired of PF-Tek? Swwerts Whole Brown Rice Cakes Pictorial
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Nobitte
Student
Registered: 02/19/08
Posts: 392
Loc: Biosphere
Last seen: 8 hours, 4 minutes
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Re: dominant/recessive properties on Psi. cubensis [Re: sof4r0ckeRs1984]
#15746080 - 02/01/12 04:46 AM (3 months, 26 days ago) |
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From what I've read, Dikaryotic refers to there being two nuclei present, which can be both identical and not.
Heterokaryotic, as far as i can tell refers to two -different- nuclei sharing the same cell space.
By these definitions, something can be Di and Hetero karyotic, but a cell can also be Di, without being Hetero(Has two nuclei, but they are identical), however not the other way round.
For (most) mushroom cultivators though, i imagine this would all be by and large irrelevant because of the ability to select traits using cloning and isolation on agar mediums.
Im pretty sure, looking at the page i posted earlier on inheritance patterns in fungi, shows that traits that occupy homologous positions would more or less follow the same patterns you would find in other eukaryotes.
Boo hiss... someone really smart... come save me from my ignorance.
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First we must learn...
Then... WE CAN TEACH 
Edited by Nobitte (02/01/12 08:36 PM)
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Mycelio
Stranger
Registered: 06/24/08
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Loc: Berlin
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Re: dominant/recessive properties on Psi. cubensis [Re: senorcafe]
#15746090 - 02/01/12 04:54 AM (3 months, 26 days ago) |
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Yep, with dikaryotic I meant two separate nuclei per hyphal cell, heterokaryotic describes a mycelium with two or more different nuclei present, for example morchella species often have dozens of nuclei per cell. The fruitbodies often revert to a dikaryotic state, forming most spores with one haploid nucleus, while a lower percentage has more than one nucleus per spore. I read about many other species, where mycologist always find some spores with more nuclei than expected.
Quote:
senorcafe said:
... how would the cell know which genes to express from which nucleus? one would say store vitamin d while the other would say replicate. or would they work in sync because they receive the same messages and hormones.
Good question... I haven't read about that yet, but logic tells me they must act in sync, using chemical signals. Just think of slime molds in the plasmodium stage with millions of nuclei per cell, perfectly synced. During fungal cell division and nuclear migration, it appears that one nucleus has a leading role, while the other follows.
Carsten
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