Jeez I guess I shoulda' read Holttum before growing my Vandas and related bare root. Lucky for me my plants can't read or they may have died years ago Paul
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of K Barrett Sent: Friday, April 28, 2006 10:37 AM To: [email protected] Subject: Re: [OGD] roots question Stephen! You da man! 5><5 (<-- that's a high five) The AOS Bulletin has several articles by Mr Holttum, however not that one. There's nothing in the ODC, either. Can anyone please scan the article and send it to me? (Please please) Any plant biologists still reading this group? Does anyone know if there has been any further work along these lines? Does it stand the test of time (and science) or has it been shot down? K Barrett N Calif, USA >I believe the article you are thinking of is: > >Holttum, R.E. "The Ecology of Tropical Epiphytic Orchids." In >Proceedings of the Third World Orchid Conference, London 1960, >196-204. London: Royal Horticultural Society, 1960. > >It says that in epiphytes, although the velamen (the outer layer of >exposed roots) can absorb small amounts of water, that water is never >passed on to the interior of the root where it can be utilized by the >plant. Absorption of water and nutrients is limited to the areas of >the roots growing in contact with the substrate. > >--Stephen _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
