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 This is a continuously updated archive of the Aroid-L mailing list in a forum format - not an actual Forum. If you want to post, you will still need to register for the Aroid-L mailing list and send your postings by e-mail for moderation in the normal way.

  gGbberellic acid and inflorescence production
From: ExoticRainforest <Steve at ExoticRainforest.com> on 2009.07.28 at 18:36:33(19590)
I just received a "lecture" on oneof the garden sites. As a result I'd like to know if anyone on thisboard has successfully used gibberellic acid to induce the productionof an inflorescence with aroid species. I have no need to try this butmy curiosity is making me want to know. I suggested the individualcheck the results on Aroid l that are available on the net since as Iread those some of our best and brightest are skeptical. http://www.hort.net/lists/aroid-l/search.pl

Now I guess I'll be off to my "blackboard" to write whatever it is I'msupposed to write 1000 times. Also, would some of you remind me not totry to help??? And don't worry, I won't bother to respond on that postagain.

Thanks!

Steve Lucas

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From: "Sherry Gates" <TheTropix at msn.com> on 2009.07.29 at 16:51:59(19593)

Hi Steve & everybody,

I can imagine your frustration...having your wealth of knowledge thrown back in your face by someone who obviously is deficient in that department. BUT I can't help but find it kind of funny, too. Sorry, but I for one, will never ever remind you not to help! People like me rely on the information and help available from such a rich resource pool! I have been just one of many to benefit from you, and several other very knowledgeable peoples' help on the Aroid l and I'll continue to turn y'alls way for help. People who can't handle the fact that they do NOT have all the answers, like whoever it was on the other post, will always be around to try to mess things up. EGO is a killer of many good things.

You just do what you do. Help, inform, and keep learning, and growing (botanically & personally)! I owe so much of what little I do know to the wonderful people I've 'met' on Aroid-l. Always a friendly, happy place to get answers.

PHOOEY (see how clean I kept it??? ) on them!

One of your many, many friends, (even though we haven't actually met)

Sherry Gates

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From: Scott Hyndman <hyndman at aroid.org> on 2009.07.29 at 18:12:02(19594)
Steve,

In the 2008 volume of Aroideana on pages 120 to 123, Dr. Paul Resslar reported in his article "The inflorescence of Caladium humboldtii Schott" how he used gibberellic acid to induce flowering in that previously unknown to flower species.

One of the orginal reports of using gibberellic acid to induce flowering in aroids was by Dr. Jake Henny of the University of Florida in 1995:

http://www.fshs.org/Proceedings/Password%20Protected/1995%20Vol.%20108/23-24%20(HENNY).pdf

Best regards, Scott

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From: Marc Gibernau <gibernau at cict.fr> on 2009.07.30 at 08:27:56(19597)
Dear Steve,

Yes gibberellic acid has been "intensively" usedto induce the production of an inflorescence with aroid. See all the workof henny and collaborators.
I wanted to try but never have time, so please keep me informed.
Here is the list of some papers by Henny:

Henny, R. J. 1980. Gibberellicacid (GA3) induces flowering in Dieffenbachia maculata'Perfection'. HortScience 15(5): 613. species.
Henny, R. J. 1981. Promotionof flowering in Spathiphyllum 'Mauna Loa' with Gibberellic Acid. HortScience 16(4): 554-555.
Henny, R. J. 1983. Stimulation of flowering in Aglaonema withgibberellic acid (GA3). Aroideana 6(3): 71-72.
Henny, R. J. 1983. Flowering of Aglaonema commutatum 'Treubii'following treatment with gibberellic acid. HortScience 18(3): 374.
Henny, R. J. and W. C. Fooshee. 1983. Flowering of Aglaonema withgibberellic acid (GA3). A follow-up report. Aroideana 6: 135-136.
Henny, R. J. and R. L. Hamilton. 1992. Flowering of Anthuriumfollowing treatment with gibberellic acid. HortScience 27(12): 1328.
Henny, R. J. 1999. Gibberellic acid-induced flowering of Syngoniumpodophyllum Schott 'White Butterfly'. HortScience 34(4):676-677.

Best regards,

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From: ExoticRainforest <Steve at ExoticRainforest.com> on 2009.07.31 at 16:34:22(19601)
Thanks Marc! I'm always glad to seeyour posts on Aroid l.

Steve

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From: ExoticRainforest <Steve at ExoticRainforest.com> on 2009.07.31 at 16:57:32(19603)
Thanks Scott! I've already read theAroideana article and Marc just recommended others including this one. I hope to see you in Miami in a few weeks!

Steve

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From: ExoticRainforest <Steve at ExoticRainforest.com> on 2009.07.31 at 17:10:31(19604)

Thanks Sherry, but I still considermyself a long way from having a "wealth of knowledge". Like the restof us I just have access to the knowledge of the real experts which caneasily be found on the IAS website.

And please allow me to use that to lead in to a reminder to those thathaven't joined the International Aroid Society just yet to considerdoing so right now! The IAS show is coming up on September 20 and 21at Fairchild Tropical Botanic Gardens in Miami and I'm personally on apush to get all my friends (that means all of you) to attend the show. The amount of knowledge available to members at the show (not countingthe plants) is incredible so please do join IAS and attend the show.

By the way, did you know that many, many aroid descriptions can befound on the IAS site? I use it and my entire library of Aroideanaalmost every day of the year!

I hope to see all of you there!

Here's the link to join: http://www.aroid.org/society/joinias.php

And members, your copy of Aroideana should be in the mail!

Steve Lucas

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From: Theodore Held <oppenhauser2001 at gmail.com> on 2009.07.31 at 18:14:54(19606)
Steve and others,

I have tried gibberelic acid on my Crypts and I was successful at
getting three flowers from a reluctant clone that had never done so
for me prior to that. If you attended my Crypt lecture at the show
last fall (or managed to stay awake), I had pictures of the three. The
first two were bizarre, weak things with a host of peculiarities. The
first was worse than the second. By the time the third appeared I got
a bloom that was well within the range of what I would expect as a
"normal" bloom. I have secured the third flower as my ID standard for
the clone. It has never flowered again.

I have a couple of articles from Florida University that I downloaded
that discuss the use of such hormones. In the commercial world GA3 (as
the usual type of giberellic acid is called) can be used to goose
aroids to flower profusely and make them more saleable. It can also be
used to coax simultaneous blooms when a cross is desired. Messing
around with the correct dosage is the key trick because you want it to
look natural. But it's done all the time.

So when you're at the Home Depot and you get an aroid with lots of
blooms and then become disappointed when you can't get the thing to
look so nice after that, lack of artificial hormone treatments might
be the cause.

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From: "E.Vincent Morano" <ironious2 at yahoo.com> on 2009.07.31 at 22:34:04(19608)
Use caution with this if you care to experiment. GA3 retards root growth and will kill your tubers/rhizomes if it comes in contact with them. Do not use on amorphophallus unless its a variety that can grow a leaf and an inflorescence at the same time but dot expect much tuber growth as GA3 retards that also because is a form of a root.

I've been using plant growth hormones for years. If you want to noticeably increase tuber growth then wait until the tuber has formed a leaf and the leaf is fully open and established. Then pour a 100-150ppm solution at the base of the plant avoiding the leaf,a higher ppm is not better, it will cause the plant to do different things. Just do this one time during the season and apply high phosphate or bone meal fertilizer. Keep in a hot and humid shaded greenhouse for optimal results. Using this method, I made a 2lb konjac grow into a 7lb monster in one season. The next year it gave me a perfect flower of specimen quality. Which Ive posted pictures of here in the past.
This year Im doing this too all my tubers

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From: ExoticRainforest <Steve at ExoticRainforest.com> on 2009.08.01 at 00:52:41(19609)
Thanks Ted. The more I read thatappears to be the findings of others. As for me I'll just allow natureto do the work of inducing an inflorescence.

Steve

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From: "Marek Argent" <abri1973 at wp.pl> on 2009.08.02 at 18:32:27(19616)
Hello,

Now I think I know why all Zantedeschia plants bought in pots in florist shops with many inflorescences died shortly after blooming.

These pot plants must have been treated with GA3, they had more inflorescences than leaves, just to be a decoration for a few weeks.

They had a lot of flowers, but no tubers, when the overground parts withered there was nothing in the pots except the peat.

Zantedeschias I buy as garden plants with huge tubers behave differently.

They produce one or a few inflorescences during summer and their tubers grow and divide.

Thanks for this info, I haven't known this

Marek

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