Request PDF on ResearchGate | PENGARUH PEMAKAIAN HORMON TUMBUH GA 3 (GIBERELIN ACID) TERHADAP PERKECAMBAHAN DAN. cara bikin giberelin,fungsi hormon etilen,fungsi hormon giberelin pada awal kemunculan buah,hormon giberelin pada tumbuhan,hormon sitokinin,letak hormon. Ramuan yang digunakan terdiri dari hormon giberelin, kolkhisin, hormon auksin, hormon sitokinin, myoinositol, vitamin B,, Mn, dan Mg. Dosis yang digunakan.

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The carbon gibberellins, such as gibberellic acid, have lost carbon 20 and, in place, possess a five-member lactone bridge that links carbons 4 and The carbon forms are, in general, the biologically active forms of gibberellins.

In other projects Wikimedia Commons. Industrially the gibberellic acid can be produced by submerged fermentation, but this process presents low yield with high production costs and hence higher sale value, nevertheless other alternative process to reduce costs of the GA3 production is Solid-State Fermentation SSF that allows the use of agro-industrial residues. GA reverses this process and allows for PIN protein trafficking bormon the cell membrane to enhance the level of auxin in the cell.

Gibberellins are produced in greater mass when the plant is exposed to cold temperatures.


Theoretical and Applied Genetics. Gibberellins are involved in the natural process of breaking dormancy and other aspects of germination. Old Dogs Learn New Tricks”. The Journal of Biological Chemistry. Annual Review of Plant Biology. Current Opinion in Plant Biology. The gibberellins are named GA1 through GAn in order of discovery. This variety of semi-dwarf rice is called IR8and it has a short height because of a mutation in the sd1 gene. For example, research that started at the University of California, Davis in the mids led to its commercial use on Thompson seedless table grapes throughout California by Gibberellins are tetracyclic diterpene acids.


The first inroads gibfrelin the understanding of GAs were developments from the plant pathology field, with studies on the bakanaeor “foolish seedling” disease in rice. Annual Review of Plant Physiology. Influence on Lavandula angustifolia Mill.

Gibberellin – Wikipedia

This was averted with the development of a high-yielding variety of rice. However despite intensive research, to date, no membrane-bound GA receptor has been isolated.

As such, GA allows for re-organisation of the cytoskeleton, and the elongation of cells. In general, the most biologically active compounds are dihydroxylated gibberellins, which possess hydroxyl groups on both carbon 3 and carbon In the early ‘s, there were several lines of evidence that suggested the existence of a GA receptor in oat seeds that was located at the plasma membrane.

Gibberellic acidwhich was the first gibberellin to be structurally characterized, is Gibereli. Trends in Plant Science. Theoretische und Angewandte Genetik. One of the most well characterized hormone transporters are PIN proteinswhich are responsible for the movement of the hormone auxin between cells.


Usually in germination, the breakdown of starch to glucose in the endosperm begins shortly after the seed is exposed to water. PIFs are transcription factors that negatively regulate light signalling and are strong promoters of elongation growth.

Plant and Cell Physiology.

Microtubules are also required for the trafficking of membrane vesicles. A relationship between GA levels and amount of stress experienced has been suggested in barley. Gibberellins GAs are plant hormones that regulate various developmental processesincluding stem elongation, germinationdormancyfloweringflower development and leaf and fruit senescence.

Knowledge of gibberellins spread around the world as the potential for its use on various commercially important plants became more obvious. By using this site, you agree to the Terms of Use and Privacy Policy.

As ofthere were GAs identified from plants, fungi, and bacteria. Journal of Plant Growth Regulation. Before the photosynthetic apparatus gkberelin sufficiently in the early stages of germination, the stored energy reserves of starch nourish the seedling. Gibberellic acid is a dihydroxylated gibberellin. GAs are usually synthesized from the methylerythritol phosphate MEP pathway in higher plants.

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