Talk:Plant hormone

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Commercial Uses of Plant Hormones

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• Hewett, E. W., & Wareing, P. F. Cytokinins in Populus x robusta Schneid: Light effects on endogenous levels. Planta 114, 119-129, 1973.
• Houck, D. H., & Lamotte, C. E. Primary phloem regeneration without concomitant xylem regeneration--its hormone control in Coleus. Amer. J. Botany 64, 799-809, 1977.
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• Jahardhan, K. V., Vasudeva, N., & Gopel, N. H. Diurnal variation of endogenous Auxin in arabica coffee leaves. J. Plant Crops 1 (Suppl), 93-95, 1973.
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Comments by Socrtwo

I removed this attribution from the article body:

My name is Paul Pruitt. I received a BA from Swarthmore College in 1984, where I studied under Dr. Mark Jacobs. My bachelor's thesis was an examination of all aspects of plant senescence, including the role of hormones. I also received an MA from the University of Pennsylvania in 1986, where I studied plants under Scott Poethig among others. I have been studying the plant physiological hormone literature and thinking about plant hormones for 20 years. I'm currently an unemployed but experienced IT support analyst who has his own small file recovery and virtual Helpdesk business. The Website can be seen here. If you have any questions or comments, send them to s.socrtwo@verizon.com. --Socrtwo 02:05, 27 Apr 2004 (UTC)

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This is socrtwo again. You know we could use some scientist editing of the entries.

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Hi folks, here's a confession, I'm an arch speculator. The information I wrote in the article, (which I mostly wrote) is speculation albeit simple speculation based on experimental evidence.

I wrote most of the bullets for the different plant hormones too although they are clear experimental findings. I did not make up the information except where specified. I will try to find the specific references for each of the findings and reference it for each plant hormone.

According to the rules of this Wiki, speculation does not belong here. Please correct the article, and I will relegate my thoughts to a more appropriate forum. Let's just say it's a placeholder for now.--socrtwo 01:06, Mar 11, 2005 (UTC)

Why plural

Shouldn't this page at Plant hormone? ✑whkoh | ✖ 01:07, Oct 23, 2004 (UTC)

Yes. apparently somebody connected the two, because they lead to the same place.--socrtwo 00:51, Mar 11, 2005 (UTC)

Why I Removed the Hormone Theory Section

This article should properly contain a history of plant hormones and currently accepted scientific theory not my speculations even if I think they are right. An encyclopedia is a place for knowledge not speculation.--socrtwo 03:41, August 11, 2005 (UTC)

Phytochrome

Is phytochrome legitimately considered a plant hormone, and if not, why not?

Jeeb 21:57, 30 October 2005 (UTC)

Phytochrome is just an enzyme,... it is not transported through the body of the plant and so there is can't be any signal function related to that movement, so it's function is not related with coordination of different parts of the plant body, so it is not hormone. It is working locally in chloroplast membrane. Reo ^ON | +++ 18:03, 25 April 2006 (UTC)

In fact, phytochrome is actually a pigment. It can be in an active (Pfr) stage or an inactive (Pr) stage. It activates via red light and is not produced in response to any situation.

Move to Plant growth regulators

Why? It is more correct, cus phytohormones are just chemical substances naturally occuring in plants. On the other hand PGRs are both phytohormones and other chemical (synthetical) substances used in labs.--Juan de Vojníkov 10:17, 13 January 2007 (UTC)

Expansion

Finally the article was rescued of its stubness. Nice work. I think that this kind of article could benefit from a summarising table, as was done at the end of the Hebrew article. Aside from the chemical structures it lists the biosynthetic progenitors of each hormone (tryptophan and methionine for auxin and ethylene, for example) and the positive and negative effect in summary. Images in such a long article would also be nice. I'd love to to all this myself if the expansion is done. Pixie 22:58, 7 September 2007 (UTC)

I have a lot more to add, but would rather build around what you have suggested (I am not competent enough to do this my self though)- so if you want to take over for now that would be great. I can add here and there. My back ground in this field is limited to PGRs used in tissue culture 20 years ago and many of those are synthetic, so will work on a section for PGRs used in tissue culture after the main parts are done. I would also be greatfull for a through editing and general clean-up (another area I am not competent in)Hardyplants 23:09, 7 September 2007 (UTC)

Needs edited for:

... grammar, spelling, run-on sentences, etc.

I don't have the time to do it right. Native English speaker, please, with scientific background? Thanks! —Preceding unsigned comment added by 66.18.161.69 (talk) 22:47, 12 September 2007 (UTC)

I need to learn Wikipedia editing practices better before I could volunteer to take that on but I did remove a pro-Nazi bit of grafitti that has no place in an article on plant hormones anyway. Spidra (talk) 01:49, 25 April 2013 (UTC)

The speculator is back

The speculator is back. If this article represents the current state of the field, I think the state of the field lacks enough speculative encompassing explanatory theory. For instance, for the most basic question: "What are the Functions of Plant Hormones?," here are my educated speculations...

• Auxin is a growth signal that the plant cells make when they have more than enough Oxygen (and Carbon Dioxide?) then they need just to survive. So in this case the plant signals that at least in the gases department, all signals are go for growth.
• Similarly Cytokinin is the same kind of signal for minerals nutrition.
• Salicylic Acid is the same kind of signal for water nutrition.
• Jasmonate is the same kind of signal for light or sugar resources.
• Conversely Ethylene is a signal of gas shortages. When a cell doesn't have enough Oxygen or Carbon Dioxide to grow, let alone remain the same size, they release Ethylene which eases such shortages but also causes the plant to prune back itself (but still maximizing Oxygen - mostly - and Carbon Dioxide which is probably only needed for growth, not survival).
• Abscisic Acid is the same sort of signal for water.
• Gibberellin is the shortage signal for sugar.
• Strigolactones are the signal for mineral shortages.

Of course this simplification may not be true. However may be some of the other chemicals looked at recently like NO and Brassinosteroids (I know they were discovered a while ago) may fit the roles.

Maybe we should just start with the roles and assign the hormones later. There may be one dominant increase in hormone in each case of gas (or maybe just Oxygen as Carbon Dioxide abundance can be covered with the sugar abundance), water, sugar and mineral abundances and shortages.

The most controversial of my assertion would be that Auxin is mainly an Oxygen abundance signal and that Gibberellin is not a growth signal but a shortages one.

You can see where the logic of all these idea go at my longer version: http://planthormones.info/.socrtwo (talk) 04:06, 30 May 2013 (UTC)

New edits are welcome, but since this is a mature and large area, I would recommend sticking to WP:SECONDARY sources: reviews in major review journals, monographs, and textbooks. The general advice is to reserve any speculation for your blog. --Smokefoot (talk) 04:17, 30 May 2013 (UTC)

The section on the '5' major classes of plant hormone is based on a reference from 1979. I would argue that this list has been substantially expanded since then. As entire fields of research work on these more recently discovered hormones, I believe they should be included in the main list, rather than relegated to 'other hormones'. Personally I would say that the main list should comprise: auxin, ABA, cytokinin, GA and ethylene, plus: brassinosteroid, JA, SA and strigolactones. The definition of hormone in plant science is difficult because the term was originally defined for animals, making it difficult for the same definition to apply for plants. The consensus in the field is that the above mentioned compounds act as 'hormones' Scotanist (talk) 09:50, 28 April 2018 (UTC)

Plants hormones

Under agriculture ss3 102.89.47.214 (talk) 17:53, 4 April 2024 (UTC)