Subject: Effects of GA3 and B-9 on first generation plants

From: Craig Maser <[email-masked]>
Date: Tue, 19 Mar 1996 20:56:56 -0800

Hello all botanists.  My name is Brian and I am doing a research project on 
the effects of Gibberelic Acid and Daminozide on first generation marigold 
and bean plants.  I treated marigolds and bean plants with Gibberelic Acid 
and Daminozide.  I collected the seeds and planted them.  What results should 
I expect from the seeds of these treated plants and why?  Also, can you tell 
me why Gibberelic Acid makes plants taller and Daminozide makes them shorter? 
I started with marigolds because I knew I would have a lot of seeds, however, 
the difference in height between the treated and the untreated plants was not 
as dramatic as I had hoped for.  That is why I also decided to use beans. I 
didn't start out using beans because I was concerned I wouldn't get enough 
seeds.

Thanks in advance for any info,
Brian Maser
[email-masked]

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From: [email-masked] (wojcik)
Date: 21 Mar 1996 15:28:28 GMT

Craig Maser ([email-masked]) wrote:
: Hello all botanists.  My name is Brian and I am doing a research project on 
: the effects of Gibberelic Acid and Daminozide on first generation marigold 
: and bean plants.  I treated marigolds and bean plants with Gibberelic Acid 
: and Daminozide.  I collected the seeds and planted them.  What results should 
: I expect from the seeds of these treated plants and why?  Also, can you tell 
: me why Gibberelic Acid makes plants taller and Daminozide makes them shorter? 
: I started with marigolds because I knew I would have a lot of seeds, however, 
: the difference in height between the treated and the untreated plants was not 
: as dramatic as I had hoped for.  That is why I also decided to use beans. I 
: didn't start out using beans because I was concerned I wouldn't get enough 
: seeds.

	Have you every studied "The Effects of Gamma Rays on `Man-in-the-Moon'
Marigolds"? (Sorry, I couldn't resist ... those who know the theater will
get the joke).

	As far as I know, the two compounds you mention ONLY have an effect
on living plant material. They are plant hormones that, as you mentioned,
effect the length of stem internodes. Their effects are not transferred
to the seeds.
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From: [email-masked] (Nancy Harrison)
Date: 22 Mar 1996 13:29:48 GMT

In article <[email-masked]>, [email-masked] 
says...
>[email-masked]
When we do GA experiments in lab, we treat the foliage, not the seeds.
I think this may be the reason you're not getting results. My understanding
is, GA solution degrades quickly, and maybe it "fizzles out" before the
seed coat breaks. Just a thought, anyway. -Nan
-- 
---Nancy Harrison ===SRJC Life Sciences/Botany===Santa Rosa, Calif.