Gibberellin biosynthesis and its regulation.

doi:10.1042/BJ20120245

Paper

Gibberellin biosynthesis and its regulation.

Published May 15, 2012 · P. Hedden, Stephen G Thomas

The Biochemical journal

Q1 SJR score

690

Citations

58

Influential Citations

Full textSemantic Scholar

Abstract

The GAs (gibberellins) comprise a large group of diterpenoid carboxylic acids that are ubiquitous in higher plants, in which certain members function as endogenous growth regulators, promoting organ expansion and developmental changes. These compounds are also produced by some species of lower plants, fungi and bacteria, although, in contrast to higher plants, the function of GAs in these organisms has only recently been investigated and is still unclear. In higher plants, GAs are synthesized by the action of terpene cyclases, cytochrome P450 mono-oxygenases and 2-oxoglutarate-dependent dioxygenases localized, respectively, in plastids, the endomembrane system and the cytosol. The concentration of biologically active GAs at their sites of action is tightly regulated and is moderated by numerous developmental and environmental cues. Recent research has focused on regulatory mechanisms, acting primarily on expression of the genes that encode the dioxygenases involved in biosynthesis and deactivation. The present review discusses the current state of knowledge on GA metabolism with particular emphasis on regulation, including the complex mechanisms for the maintenance of GA homoeostasis.

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Study Snapshot

Gibberellin biosynthesis and regulation in higher plants are tightly regulated, with complex mechanisms for maintaining homoeostasis, promoting organ expansion and developmental changes.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Gibberellin biosynthesis and its regulation.

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References

Gibberellin biosynthesis and signalling in Arabidopsis root growth

Gibberellin biosynthesis and signaling are crucial for correct root growth in Arabidopsis, with endodermal cells playing a crucial role in regulating cell division and other cell types playing a role in growth.

Molecular Characterization of Rht-1 Dwarfing Genes in Hexaploid Wheat12[C][W][OA]

Rht-1 dwarfing genes in wheat can be used to increase yield and resistance to stem lodging by producing more active growth repressors, potentially improving crop resistance to pests and diseases.

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Gibberellin signaling plays a crucial role in stamen development, regulating tapetum secretory functions and programmed cell death through the GAMYB class of transcription factors in rice and Arabidopsis.

Gibberellin A1 Metabolism Contributes to the Control of Photoperiod-Mediated Tuberization in Potato

StGA3ox2 expression and gibberellin metabolism significantly contribute to the tuberization time in photoperiod-dependent potato plants, with over-expression leading to taller plants and earlier tuberization under short-day conditions.

Two Arabidopsis cytochrome P450 monooxygenases, CYP714A1 and CYP714A2, function redundantly in plant development through gibberellin deactivation.

ELA1 and ELA2 in Arabidopsis regulate plant growth through gibberellin deactivation, with ELA2 potentially aiding in molecular breeding for high yield potential in cereal crops.

Citations

Metagenomic Characterization of the Maerua crassifolia Soil Rhizosphere: Uncovering Microbial Networks for Nutrient Acquisition and Plant Resilience in Arid Ecosystems

The bacterial-fungal network in Maerua crassifolia's soil rhizosphere plays a crucial role in nutrient acquisition and plant resilience in arid environments.

Allelism of Uncharacterized Dwarf Mutants in Maize

New dwarf mutants in maize have been identified, potentially improving our understanding of plant height control and global production.

The Mining for Flowering-Related Genes Based on De Novo Transcriptome Sequencing in the Endangered Plant Phoebe chekiangensis

This study reveals that gibberellin signaling pathway-related genes are the most predominant expression levels in Phoebe chekiangensis, providing valuable insights for future breeding efforts.

Effects of Zinc, Manganese, and Molybdenum Fertilizers on Growth and Main Medicinal Metabolites of Stauntonia leucantha Leaves

Zinc and molybdenum fertilizers enhance the medicinal value of Stauntonia leucantha leaves, with the optimal combination being Zn3Mn1Mo3 (T7), 6 g/plant of zinc sulfate, 3 g/plant of ammonium molybdate

Exogenous GA3 significantly improved the grain filling process and yield traits of Rht15 dwarf lines in durum wheat

Exogenous GA3 can compensate for the negative effect of Rht15 on yield in durum wheat, improving grain filling and yield traits while maintaining good lodging resistance.