Lee- Can you suggest an allelopathically positive effect (chemical combinations that turn out to be synergistic come to mind)? -Don
> Date: Thu, 24 Sep 2009 14:18:13 -0500 > From: [email protected] > To: [email protected] > Subject: [ENTS] Re: Marion Brooks Natural Area, Elk County, PA > > > Don: > > Most ecologists take allelopathic to mean negative effects on other > plant species. The plants that benefit could be either directly and > positively affected by the allelopathic chemical (but this is unlikely), > or benefit indirectly by being insensitive to the allelopathic chemical, > but being freed from competition by removal of other species sensitive > to the allelopathic chemicals (this is the most likely case, but no proof). > > Lee > > DON BERTOLETTE wrote: > > Lee/Mike- > > In my time wandering through Kentucky woods, black walnut trees were > > the only thing I saw that could alter the advance of a field of poke > > salat! > > My question? What would negative allelopathic refer to? I can see > > that it would be positive in this case for black walnut and negative > > to most anything else, but I suspect it may refer to something else > > entirely? > > -Don > > > > > Date: Thu, 24 Sep 2009 07:50:26 -0500 > > > From: [email protected] > > > To: [email protected] > > > Subject: [ENTS] Re: Marion Brooks Natural Area, Elk County, PA > > > > > > > > > Mike: > > > > > > We had a discussion a while ago on this topic, probably before you were > > > on the list. Black walnut and butternut produce the allelopathic > > > chemical juglone, which can stunt growth or even kill certain plant > > > species, although I have seen raspberries and a species of coneflower > > > (Rudbeckia triloba, the branched coneflower), growing under black > > walnut > > > trees. > > > > > > Sugar maple and bracken fern have also been found to produce > > > allelopathic chemicals that reduce germination and growth of competing > > > plants. There are probably many other examples. > > > > > > Lee > > > > > > > > > > > > > > > > > > > > > > _________________________________________________________________ Insert movie times and more without leaving Hotmail®. http://windowslive.com/Tutorial/Hotmail/QuickAdd?ocid=TXT_TAGLM_WL_HM_Tutorial_QuickAdd_062009 --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org Send email to [email protected] Visit this group at http://groups.google.com/group/entstrees?hl=en To unsubscribe send email to [email protected] -~----------~----~----~----~------~----~------~--~---
