Talk:Plant hormone

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Commercial Uses of Plant Hormones[edit]

  • Abeles, F. B., Holm, R. E., & Gahagan, H. E. Abscission: the role of aging. Plant Physiology 42, 1351-56, 1967.
  • Adedipe, N. O., Hunt, L. A., & Fletcher, R. A. Effects of Benzyladenine on Photosynthesis growth and senescence of the bean plant. Phys. Plant. 25, 151-53, 1979.
  • Addicott, F. T., Carns, H. R., Lyon, J. L., Smith, O. E., & McMeans, J. L. On the physiology of Abscisins. Recrulateurs Naturels de la Croissance Vegetale, pp. 687-703. Paris: C.N.R.S., 1964.
  • Barrington, E. J. W. Hormones. The New Encyclopaedia Britannica. Macropaedia v. 8, pp. 1074-88. Chicago: Encyclopaedia Britannica, Inc., 1975.
  • Beevers, L., Loveys, B., Pearson, J. A., & Wareing, P. F. Phytochrome and hormonal expansion and greening of etiolated wheat leaves. Planta 90, 286-94, 1970.
  • Black, M. Abscisic Acid in seed germination and dormancy. Abscisic Acid, ed. F. T. Addicott, pp. 331-364. New York: Praeger, 1983.
  • Booth ? Nature London 194-204
  • Brown, A. W., Reeve, D. R., & Crozier, A. The effect of light on the Gibberellin metabolism and growth of Phaseolus coccineus seedlings. Planta 126, 83-91, 1975.
  • Burg, S. P., & Burg, E. A. The interaction between Auxin and Ethylene and its role in plant growth. PKAS 55, 262-69, 1966.
  • Davis & Wareing ? Planta 65 p. 139
  • Engelke, A. L., Hamzi, H. Q., & Skoog. F. Cytokinin-Gibberellin regulation of shoot development and leaf form in tobacco plantlets. Amer. J. of Botany 60, 491-95, 1973.
  • Esashi, Y., & Leopold, A. C. Plant Physiology 44, 1470, 1970.
  • Goeschl, J. D., Pratt, H. K., & Bonner, B. An effect of light on the production of Ethylene and the growth of the plumula portion of the etiolated pea seedling. Plant Physiology 42, 1077-80, 1967.
  • Goldthwaite, J. J. Further studies of hormone regulated senescence in Rumex leaf tissue. Plant Growth Substances, 1970, ed. D. J. Carr, pp. 581-88. Berlin: Springer, 1972.
  • Hayes, P. M., & Patrick J. W. Photosynthate transport in stems of Phaseolus vulgaris treated with Gibberellic Acid, Indole 3-Acetic Acid or Kinetin. Effects at the14site of hormone application. Planta 166: 371-79, 1985.
  • 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.
  • Imaseki, H. Hormonal control of wound-induced responses. Encyclopedia of Plant Physiology. v. 11, ed. R. P. Pharis & D. M. Reid, p. 504, Heidelberg: Springer Verlag, 1985.
  • Jacobs, W. P. Comparison of the movement and vascular differentiation effects of the endogenous Auxin and of phenoxyacetic weed killers in stems and petioles of Coleus and Phaesolus. Ann. N.Y. Acad. Sci. 144, 102-117, 1967.
  • 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.
  • Kawase, M. Effects of flooding on Ethylene concentration in horticultural plants. J. Am. Soc. Hortic. Sci. 97, 584-88, 1972.
  • Lecoq, C., Koukkari, W. L., & Brenner, M. L. Rhythmic changes in Abscisic Acid (Abscisic Acid) content of soybean leaves. Plant Physiology 72 (suppl.), 52, 1983.
  • Manos, P.J., & Goldthwaite, J. A kinetic analysis of the effects of Gibberellic acid, Zeatin, and Abscisic Acid on leaf tissue senescence in Rumex. Plant Physiology 55, 192-98, 1975.
  • Marre, E. Effects of fusiccocin and hormones on plant cell membrane activities, observations and hypothesis. Regulation of Cell Membrane Activities in Plants. eds. Marre, E. & Caffer, O. Amsterdam: Elsevier/North Holland Biomedical Press, pp. 175-202, 1977.
  • McMichael, B. L., & Hanny, B. W. Endogenous levels of Abscisic Acid in Water stressed cotton leaves. Agron. J. 69, 979-82, 1982.
  • Mitsuhashi-Kato, M., Mishibaoka, H., & Shimokoriyama, M. Anatomical and physiological aspects of developmental processes of adventitious root formation. Plant and Cell Physiology 19, 393-400, 1978.
  • Nooden, L. D. Senescence in the whole plant. Senescence in Plants, ed. K. V. Thimann, Boca Raton, FL: CRC Press, 1980.
  • Palmer, J. H., & Phillips, I. D. J. The effect of the terminal bud indole acetic acid and nitrogen supply on the growth and orientation of the petiole of the Helianthus. Annus. Physiol. Plant 16, 572-84, 1963.
  • Pooviah, B. W., and Leopold, A. C. Deferral of leaf senescence with calcium. Plant Physiology 52, 236-39, 1973.
  • ??, Phys. Plant v. 51 375-79
  • Reid, D. M., and Wample, R. L. Water relations and plant hormones. Chapter 14 in Volume 11, Hormonal Regulation of Development III, eds. A. Pirson and M. H. Zimmerman. Heidelberg: Springer Verlag, 1985.
  • Reinhold, L. Phytohormones and the orientation of growth. Phytohormones and Related Compounds a Comprehensive Treatise, v. II, ed. by D. S. Letham, P. B. Goodwin, and T.J. V. Higgins. Amsterdam: Elsevier/North Holland Biomedical Press, 1978.
  • Ross, E. L. Growth regulators and conifers: their physiology and potential uses in forestry. Plant Growth Regulating Chemicals, v. II, ed. by L. G. Nickell. Boca Raton, FL: CRC.
  • Sachs, T., and Thimann, K. V. The Role of Auxin and Cytokinin in the Release of Buds from Dominance. Amer. J. Bot. 54, 136-44, 1967.
  • Sembdner, G., Gross, D., Liebisch, H. W., and Schneidner, G. Bio-synthesis and metabolism of plant hormones. Hormonal Regulation of Development 1, ed. J. MacMillen, Heidelberg: Springer Verlag, 1980.
  • Skoog, F., and Miller, W. Chemical regulation of growth and organ formation in plant tissues cultured in vitro. Symp. Soc. Exp. Biol. 11, 118, 1957.
  • Snow, R. Plagiotropism and correlative inhibition. New Phytologist 44, 110-117, 1945.
  • Sutcliffe, J. F. Regulation in the whole plant. In Transport in Plants v. 2. Part B: Tissues and Organs. Encyclopedia of Plant Physiology, ed. U. Luttge and M. G. Pitman. Heidelberg: Springer Verlag, 1976.
  • Thimann, K. V. Cell Enlargement and Growth. Hormone Action in the Whole Life of the Plant Amherst: Univ. of Mass. Press, 1977.
  • Thompson, M. J., Meudt, W. J., Mardava, N. B., Dutky, S. R.1Lusby, W. R., and Spaulding, D. W. Synthesis of Brassinosteroid and relationship of structure to plant growth promoting effect. Steroid 39 #1, 89-105, 1982.
  • Torrey, J. G. Auxin control of vascular pattern formation in regenerating pea root meristems grown in vitro. Amer. J. Bot. 44, 859-870, 1957.
  • Van Staden, J., and Smith, A. R. The synthesis of Cytokinin in excised roots of maize and tomato under aseptic conditions. Annals Bot. 42, 751-753, 1978.
  • Varner, J. E. GA-controlled synthesis of alpha-amylase in barley endosperm. Plant Physiology 39, 413-415, 1964.
  • Wain, R. L. Some development in research on plant growth inhibitors. Proc. Roy, Soc. B. 191, 335-352, 1975.
  • Wareing, P. F., and Phillips, I. D. J. Growth and Differentiation in Plants. Great Britain: Pergamon Press, 1981.
  • Webb, D. P., Van Staden, J., and Wareing, T. F. Seed dormancy in Acer. In J. Exp. Bot. 24, 105-106, 1973.
  • Wright, S. T. C. The effect of plant growth regulator treatments on the levels of ethylene emanating from excised turgid and wilted wheat leaves. Planta 148, 381-88, 1980.
  • ZeevABArt, J. A. D. Giberellin and flowering. The Biochemistry and Physiology of Giberellin, v. 2, ed. A. Crozier, New York: Praeger, 1983.
  • Zimmerman, P. W., and Hitchcock, A. E. Initiation and stimulation of adventitious roots caused by unsaturated hydrocarbon Gases. Contributions to the Boyce Thompson Institute 5, 351-369, 1933.

Comments by Socrtwo[edit]

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 --Socrtwo 02:05, 27 Apr 2004 (UTC)

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

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[edit]

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[edit]

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)


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[edit]

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)


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:[edit]

... 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 (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[edit]

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: (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)