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#1
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Tall Potato Orchid
These are popping out all over the place now. Flowering is very rapid and
individual flowers are usually pollinated within a day. Tallest one I saw today was 110cm high. -- http://rnr.id.au |
#2
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Tall Potato Orchid
Thanks for the show Reiner, also always nice to see your wonderful
photography. Cheers Wendy AusDigi wrote: These are popping out all over the place now. Flowering is very rapid and individual flowers are usually pollinated within a day. Tallest one I saw today was 110cm high. |
#3
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Tall Potato Orchid
Thanks Wendy
"Wendy7" wrote in message ... Thanks for the show Reiner, also always nice to see your wonderful photography. |
#4
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Tall Potato Orchid
Would that be saprophytic, Reiner?
On Sun, 2 Dec 2007 21:36:34 +1100, "AusDigi" wrote: These are popping out all over the place now. Flowering is very rapid and individual flowers are usually pollinated within a day. Tallest one I saw today was 110cm high. Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#5
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Tall Potato Orchid
One reference says its saprophytic while another says epiparasitic, though
it doesn't mention the parasite it might be parasitizing. "Dave Gillingham" wrote in message ... Would that be saprophytic, Reiner? |
#6
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Tall Potato Orchid
The inflorescence just had that look about it.
I really don't know the difference between saprophytic & epiparasitic. I have this feeling I've heard somewhere that a saprophytic relationship is mutually beneficial to the orchid & the fungus; whereas epiparasitic involves the orchid parasitising the fungus it relies on for nutrition, to the detriment of the fungus. Can anyone comment? On Wed, 5 Dec 2007 20:41:37 +1100, "AusDigi" wrote: One reference says its saprophytic while another says epiparasitic, though it doesn't mention the parasite it might be parasitizing. "Dave Gillingham" wrote in message .. . Would that be saprophytic, Reiner? Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#7
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Tall Potato Orchid
Hi Dave
Found this from a paper by Martin Bidartondo and others in Molecular Ecology (2001) 10, 2285–2295. "Epiparasitic plants are nonphotosynthetic and they obtain fixed carbon from other plants via a shared mycorrhizal fungus. This behaviour makes them cheaters of one of the most pervasive mutualisms in terrestrial ecosystems. There are several unique features of epiparasitic cheating that make it a system likely to yield novel insights into symbiotic interactions. First, epiparasitism involves a plant–fungal mutualism, whereas our understanding of cheating is based on animal (almost exclusively insect) interactions. Second, the photosynthetic host does not interact directly with its epiparasite. Thus, because there is no opportunity for the photosynthetic host to select against its epiparasite without selecting against its own mutualist, an ‘unholy alliance’ is forged between the epiparasitic plant and the mycorrhizal fungus. Third, it is a system that combines an intimate interaction (i.e. one with cell to cell contact) with a diffuse one (single fungi associated with multiple plants and vice versa)." Does that make it clearer? ;-) John "Dave Gillingham" wrote in message ... The inflorescence just had that look about it. I really don't know the difference between saprophytic & epiparasitic. I have this feeling I've heard somewhere that a saprophytic relationship is mutually beneficial to the orchid & the fungus; whereas epiparasitic involves the orchid parasitising the fungus it relies on for nutrition, to the detriment of the fungus. Can anyone comment? On Wed, 5 Dec 2007 20:41:37 +1100, "AusDigi" wrote: One reference says its saprophytic while another says epiparasitic, though it doesn't mention the parasite it might be parasitizing. "Dave Gillingham" wrote in message . .. Would that be saprophytic, Reiner? Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#8
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Tall Potato Orchid
Sort of like the curate's egg - clearer in patches. Thanks, John. Was I right
about the saprophytes having a mutually beneficial relationship? Or should the term saprophytic be wholly replaced by epiparasitic? On Thu, 6 Dec 2007 16:30:14 +1100, "John Varigos" wrote: Hi Dave Found this from a paper by Martin Bidartondo and others in Molecular Ecology (2001) 10, 2285–2295. "Epiparasitic plants are nonphotosynthetic and they obtain fixed carbon from other plants via a shared mycorrhizal fungus. This behaviour makes them cheaters of one of the most pervasive mutualisms in terrestrial ecosystems. There are several unique features of epiparasitic cheating that make it a system likely to yield novel insights into symbiotic interactions. First, epiparasitism involves a plant–fungal mutualism, whereas our understanding of cheating is based on animal (almost exclusively insect) interactions. Second, the photosynthetic host does not interact directly with its epiparasite. Thus, because there is no opportunity for the photosynthetic host to select against its epiparasite without selecting against its own mutualist, an ‘unholy alliance’ is forged between the epiparasitic plant and the mycorrhizal fungus. Third, it is a system that combines an intimate interaction (i.e. one with cell to cell contact) with a diffuse one (single fungi associated with multiple plants and vice versa)." Does that make it clearer? ;-) John "Dave Gillingham" wrote in message .. . The inflorescence just had that look about it. I really don't know the difference between saprophytic & epiparasitic. I have this feeling I've heard somewhere that a saprophytic relationship is mutually beneficial to the orchid & the fungus; whereas epiparasitic involves the orchid parasitising the fungus it relies on for nutrition, to the detriment of the fungus. Can anyone comment? On Wed, 5 Dec 2007 20:41:37 +1100, "AusDigi" wrote: One reference says its saprophytic while another says epiparasitic, though it doesn't mention the parasite it might be parasitizing. "Dave Gillingham" wrote in message ... Would that be saprophytic, Reiner? Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#9
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Tall Potato Orchid
Dave, I think you are right.
I recall having this discussion before where it was difficult to describe what benefit the fungus got from what is obviously an unfair relationship. So epiparasitic seems a more apt description of the relationship. John "Dave Gillingham" wrote in message ... Sort of like the curate's egg - clearer in patches. Thanks, John. Was I right about the saprophytes having a mutually beneficial relationship? Or should the term saprophytic be wholly replaced by epiparasitic? On Thu, 6 Dec 2007 16:30:14 +1100, "John Varigos" wrote: Hi Dave Found this from a paper by Martin Bidartondo and others in Molecular Ecology (2001) 10, 2285–2295. "Epiparasitic plants are nonphotosynthetic and they obtain fixed carbon from other plants via a shared mycorrhizal fungus. This behaviour makes them cheaters of one of the most pervasive mutualisms in terrestrial ecosystems. There are several unique features of epiparasitic cheating that make it a system likely to yield novel insights into symbiotic interactions. First, epiparasitism involves a plant–fungal mutualism, whereas our understanding of cheating is based on animal (almost exclusively insect) interactions. Second, the photosynthetic host does not interact directly with its epiparasite. Thus, because there is no opportunity for the photosynthetic host to select against its epiparasite without selecting against its own mutualist, an ‘unholy alliance’ is forged between the epiparasitic plant and the mycorrhizal fungus. Third, it is a system that combines an intimate interaction (i.e. one with cell to cell contact) with a diffuse one (single fungi associated with multiple plants and vice versa)." Does that make it clearer? ;-) John "Dave Gillingham" wrote in message . .. The inflorescence just had that look about it. I really don't know the difference between saprophytic & epiparasitic. I have this feeling I've heard somewhere that a saprophytic relationship is mutually beneficial to the orchid & the fungus; whereas epiparasitic involves the orchid parasitising the fungus it relies on for nutrition, to the detriment of the fungus. Can anyone comment? On Wed, 5 Dec 2007 20:41:37 +1100, "AusDigi" wrote: One reference says its saprophytic while another says epiparasitic, though it doesn't mention the parasite it might be parasitizing. "Dave Gillingham" wrote in message m... Would that be saprophytic, Reiner? Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#10
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Tall Potato Orchid
How about these, John and Co: 'Myco-heterotrophic plants' and
'holoparasitic plants' "Mycoheterotrophic plants are nonphotosynthetic parasites using fungal intermediaries to withdraw nutrients from other plants" holoparasitic plants - "no direct contact of the parasite with its host plant" see: http://www.biosci.ohio-state.edu/~aw...evolution.html -- ) "John Varigos" wrote in message om... Hi Dave Found this from a paper by Martin Bidartondo and others in Molecular Ecology (2001) 10, 2285-2295. "Epiparasitic plants are nonphotosynthetic and they obtain fixed carbon from other plants via a shared mycorrhizal fungus. This behaviour makes them cheaters of one of the most pervasive mutualisms in terrestrial ecosystems. There are several unique features of epiparasitic cheating that make it a system likely to yield novel insights into symbiotic interactions. First, epiparasitism involves a plant-fungal mutualism, whereas our understanding of cheating is based on animal (almost exclusively insect) interactions. Second, the photosynthetic host does not interact directly with its epiparasite. Thus, because there is no opportunity for the photosynthetic host to select against its epiparasite without selecting against its own mutualist, an 'unholy alliance' is forged between the epiparasitic plant and the mycorrhizal fungus. Third, it is a system that combines an intimate interaction (i.e. one with cell to cell contact) with a diffuse one (single fungi associated with multiple plants and vice versa)." Does that make it clearer? ;-) John "Dave Gillingham" wrote in message ... The inflorescence just had that look about it. I really don't know the difference between saprophytic & epiparasitic. I have this feeling I've heard somewhere that a saprophytic relationship is mutually beneficial to the orchid & the fungus; whereas epiparasitic involves the orchid parasitising the fungus it relies on for nutrition, to the detriment of the fungus. Can anyone comment? On Wed, 5 Dec 2007 20:41:37 +1100, "AusDigi" wrote: One reference says its saprophytic while another says epiparasitic, though it doesn't mention the parasite it might be parasitizing. "Dave Gillingham" wrote in message ... Would that be saprophytic, Reiner? Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
#11
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Tall Potato Orchid
Don't think either fit Peter.
"Mycoheterotrophic plants are nonphotosynthetic parasites using fungal intermediaries to withdraw nutrients from other plants" From which other plant is the orchid drawing nutrients? "holoparasitic plants - no direct contact of the parasite with its host plant" This implies that the orchid is a parasite but what is the host plant with which it doesn't have contact? JV "P Max" wrote in message ... How about these, John and Co: 'Myco-heterotrophic plants' and 'holoparasitic plants' "Mycoheterotrophic plants are nonphotosynthetic parasites using fungal intermediaries to withdraw nutrients from other plants" holoparasitic plants - "no direct contact of the parasite with its host plant" see: http://www.biosci.ohio-state.edu/~aw...evolution.html -- ) "John Varigos" wrote in message om... Hi Dave Found this from a paper by Martin Bidartondo and others in Molecular Ecology (2001) 10, 2285-2295. "Epiparasitic plants are nonphotosynthetic and they obtain fixed carbon from other plants via a shared mycorrhizal fungus. This behaviour makes them cheaters of one of the most pervasive mutualisms in terrestrial ecosystems. There are several unique features of epiparasitic cheating that make it a system likely to yield novel insights into symbiotic interactions. First, epiparasitism involves a plant-fungal mutualism, whereas our understanding of cheating is based on animal (almost exclusively insect) interactions. Second, the photosynthetic host does not interact directly with its epiparasite. Thus, because there is no opportunity for the photosynthetic host to select against its epiparasite without selecting against its own mutualist, an 'unholy alliance' is forged between the epiparasitic plant and the mycorrhizal fungus. Third, it is a system that combines an intimate interaction (i.e. one with cell to cell contact) with a diffuse one (single fungi associated with multiple plants and vice versa)." Does that make it clearer? ;-) John "Dave Gillingham" wrote in message ... The inflorescence just had that look about it. I really don't know the difference between saprophytic & epiparasitic. I have this feeling I've heard somewhere that a saprophytic relationship is mutually beneficial to the orchid & the fungus; whereas epiparasitic involves the orchid parasitising the fungus it relies on for nutrition, to the detriment of the fungus. Can anyone comment? On Wed, 5 Dec 2007 20:41:37 +1100, "AusDigi" wrote: One reference says its saprophytic while another says epiparasitic, though it doesn't mention the parasite it might be parasitizing. "Dave Gillingham" wrote in message m... Would that be saprophytic, Reiner? Dave Gillingham ------------------------------------------------------------------------------ To email me remove the .private from my email address. |
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