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Mistletoe
From: (Iris Cohen)
European mistletoe is not a parasite It is a hemiparasite. Big difference Please clarify. I understand Phoradendron is not considered a full parasite because it has leaves with chlorophyll. Somebody in another newsgroup called it a water parasite. There is another genus of mistletoe which I guess you would call a full parasite because it sends roots into the wood & weakens the tree. Is this what you meant? Arceuthobium isn't always green, and can kill trees. Sean -- Visit my photolog page; http://members.aol.com/grommit383/myhomepage Last updated 08-04-02 with 15 pictures of the Aztec Ruins. Address mungled. To email, please spite my face. |
#2
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Mistletoe
----- Original Message -----
From: P van Rijckevorsel To: Iris Cohen Sent: Sunday, January 12, 2003 10:51 AM Subject: Mistletoe Yes, a full parasite would ideally derive everything it needs from its host. Of course there are a number of plants that used to be called parasites and are now called myco-heterotrophs. Also there are parasites, the Santalaceae come to mind, that will develop their own leaves and do a pretty good job of making their own sugars, but that when young will take part of their carbon compounds from hosts I guess a plant is a full parasite if it derives the full spectrum of its needs from a host, even if in each category it gets only part of what it needs and gets a part itself. Of course it must not give anything substantial in return. European mistletoe gets only its water (and minerals) from its host and thus is a hemi-parasite. PvR ================== European mistletoe is not a parasite It is a hemiparasite. Big difference From: (Iris Cohen) Please clarify. I understand Phoradendron is not considered a full parasite because it has leaves with chlorophyll. Somebody in another newsgroup called it a water parasite. There is another genus of mistletoe which I guess you would call a full parasite because it sends roots into the wood & weakens the tree. Is this what you meant? Sean Houtman schreef Arceuthobium isn't always green, and can kill trees. Sean |
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