Hi,
This is starting to make sense...
I have started chasing on the internet, the link between some
mycorrhizal fungi's production of gibberellin-like compounds (gibberellic
acid, a growth enhancer), and how they affect plant growth. So if
I am reading into this properly, some strains of mycorrhizal fungi
produce compunds that are similar to plant growth hormones (I bet Lon covered
this and I missed it).
Now I need to find an online thesis that explains the "gibberellic acid-like
compounds" produced by mycorrhiza fungi.
Do you have any specific knowledge Lon? I will let you know what
I find.
Regards,
Tom
"Lon J. Rombough" wrote:
Gibberellic Acid (GA) is a plant growth hormone that
causes elongation of shoots, and reduces or eliminates dormancy in seeds.
It is also the same hormone used to increase set and berry size in seedless
grapes. GA is also sold as "tomato set" as it will make tomatoes
set, usually with very few seeds in the fruits. It was first isolated
from a fungus that causes "crazy rice" disease in which rice plants get
excessively elongated stems, making the plant fall over.
GA will reduce or eliminate dormancy in many species
of seeds. Peach seedlings that have not had enough chilling will
be very short with rosetted leaves, but when treated with GA, they grow
normally. It has been used to reduce or eliminate dormancy in Rubus
(raspberry and blackberry) seeds, and many other plants.
-Lon Rombough
Grapes, unusual fruits, writing, consulting, more, at http://www.hevanet.com/lonrom
See new additions to the site, Feb. 2001, plus word on my grape book.
----------
From: Tom Olenio <tolenio@sentex.net>
To: nafex@yahoogroups.com
Subject: [nafex] Gibberellin (GA)
Date: Sat, Mar 10, 2001, 3:13 PM
Hello,
The following web page talks about Gibberellin (GA) can be used to bypass
apple seed stratification. Does anyone know what it is?
======
http://agschool.fvsc.peachnet.edu/html/Publications/PlantScience/ars102.htm
<http://agschool.fvsc.peachnet.edu/html/Publications/PlantScience/ars102.htm>
"We concluded that Gibberellin (GA) treatment of dormant apple embryos
could be used to bypass stratification. This practice is suggested for
those who are not interested in higher rates of germination and do not
want to wait the minimum time required for partial stratification. Application
of Cytokinins along with Gibberellin (GA) treatment is further suggested
to produce a synergistic effect in the germination of dormant apple seeds."
========
The article also states that ABA (rooting hormome) will hold
a seed a seed in dormancy. Something I never knew.
Strange that the hormone that helps stimulate roots, will hold a seed
in dormancy.
Regards,
Tom
--
Thomas Olenio
Ontario, Canada
Hardiness Zone 6a
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Thomas Olenio
Ontario, Canada
Hardiness Zone 6a
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