Interactions of Gibberellins with Phytohormones and Their Role in Stress Responses

Castro-Camba, Ricardo; Sánchez, Conchi; Vidal, Nieves; Vielba, Jesús M.

doi:10.3390/horticulturae8030241

Cited by 30 publications

(22 citation statements)

References 195 publications

(212 reference statements)

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“…Fundamental molecular aspects of GA synthesis, homeostasis, and signaling have been described in the last years, although several issues concerning transport or interactions with other phytohormones are still not fully elucidated [ 17 ]. GAs are acid diterpenoids derived from the terpenes route.…”

Section: History Of Gibberellins Researchmentioning

confidence: 99%

“…Balance between the activity of these different types of enzymes determines the GA content in plants, thus establishing these oxidases as the main targets for the GA regulation exerted by other compounds, genes, or phytohormones. However, a more detailed view of GA synthesis and homeostasis was recently reviewed [ 17 ].…”

Section: History Of Gibberellins Researchmentioning

confidence: 99%

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Plant Development and Crop Yield: The Role of Gibberellins

Castro-Camba

Sánchez²,

Vidal³

et al. 2022

Plants

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Gibberellins have been classically related to a few key developmental processes, thus being essential for the accurate unfolding of plant genetic programs. After more than a century of research, over one hundred different gibberellins have been described. There is a continuously increasing interest in gibberellins research because of their relevant role in the so-called "Green Revolution", as well as their current and possible applications in crop improvement. The functions attributed to gibberellins have been traditionally restricted to the regulation of plant stature, seed germination, and flowering. Nonetheless, research in the last years has shown that these functions extend to many other relevant processes. In this review, the current knowledge on gibberellins homeostasis and mode of action is briefly outlined, while specific attention is focused on the many different responses in which gibberellins take part. Thus, those genes and proteins identified as being involved in the regulation of gibberellin responses in model and non-model species are highlighted. The present review aims to provide a comprehensive picture of the state-of-the-art perception of gibberellins molecular biology and its effects on plant development. This picture might be helpful to enhance our current understanding of gibberellins biology and provide the know-how for the development of more accurate research and breeding programs.

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Section: History Of Gibberellins Researchmentioning

confidence: 99%

Section: History Of Gibberellins Researchmentioning

confidence: 99%

Plant Development and Crop Yield: The Role of Gibberellins

Castro-Camba

Sánchez²,

Vidal³

et al. 2022

Plants

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“…Gibberellins are growth phytoregulators that regulate seed germination, root and stem growth, and leaf and fruit senescence [38]. DPM17, as a PGPB, produced 1.37 µg mL −1 gibberellin, which is apparently higher than that (0.002-015 µg mL −1 ) reported previously [39,40].…”

Section: Discussionmentioning

confidence: 77%

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

2022

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Beneficial soil microorganisms influence nutrient recycling, soil fertility, plant growth, and productivity and reduce chemical fertilizer application. This study aimed to isolate bacteria from non-agricultural soils in the Al-Ahsa region and characterize the bacteria with the best biostimulating characteristics at the physiological, biochemical, and molecular level. DPM17, a bacterial isolate, promotes plant growth through phosphate solubilization, nitrogen fixation, and ammonia production. DPM17 also produces the phytohormones, indole acetic acid (IAA; 4.516 μg mL−1) and gibberellin (1.33 µg mL−1), and ammonia (0.06 µg mL−1). Additionally, DPM17 grows in the presence of up to 10% NaCl, indicating its halophilic nature. DPM17 was identified as Bacillus baekryungensis based on comparative sequence analysis of the 16S rRNA gene, and neighbor-joining phylogenetic analyses indicated that DPM17 was 96.51% identified to Bacillus sp. DPM17 inoculation substantially improved Abelmoschus esculentus (okra) root length, lateral root count, and dry weight from 7.03 to 9.41 (p = 0.03), 3.2 to 7.2, and 6 to 13 mg (p = 0.032), respectively. The results suggest that DPM17 enhances plant growth and can be exploited to develop efficient formulations for sustainable agriculture and food security in Saudi Arabia.

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“…Second, GA interacts with other plant hormones, thus indirectly affecting the plant growth by changing the levels of auxin, brassinolide, and ethylene (Wang et al, 2017;CastroCamba et al, 2022).…”

Section: Indicatormentioning

confidence: 99%

“…Plant hormones mediate the plant growth and nutrient (including Se) absorption (Peleg and Blumwald, 2011). For instance, gibberellic acid (GA) promotes the photosynthesis, vegetative growth, and fruit development of crops (CastroCamba et al, 2022). GA can regulate the crop growth and promote the nutrient absorption (Hassan and Mansoor, 2017;Zhang et al, 2020).…”

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confidence: 99%

Gibberellic acid promotes selenium accumulation in Cyphomandra betacea under selenium stress

Zhang

Wang

et al. 2022

Front. Plant Sci.

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The selenium (Se) deficiency is threatening the human health, and the increase of Se content in food can prevent the Se deficiency of human body. To increase the Se content in fruit trees and alleviate the Se stress to fruit trees, the effects of gibberellic acid (GA) on the growth and Se accumulation in Cyphomandra betacea under Se stress were studied. Although GA increased the biomass of C. betacea, it did not significantly affect the root/shoot ratio. The root and shoot biomass had a quadratic polynomial regression relationship with the GA concentration. Furthermore, GA increased the photosynthetic pigment content, photosynthetic parameters, and antioxidant enzyme activity of C. betacea. GA also increased the Se content in C. betacea, peaking at 300 mg/L GA. For instance, GA (300 mg/L) increased the Se contents in roots and shoots of C. betacea by 70.31 and 22.02%, respectively, compared with the control. Moreover, the root Se and shoot Se contents had a quadratic polynomial regression relationship with the GA concentration. Correlation and gray relational analyses showed that the carotenoid, chlorophyll a, and chlorophyll b contents were closely related to the Se uptake in C. betacea under the GA application. These results show that GA (300 mg/L) can promote the growth and Se uptake of C. betacea under Se stress.

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Interactions of Gibberellins with Phytohormones and Their Role in Stress Responses

Cited by 30 publications

References 195 publications

Plant Development and Crop Yield: The Role of Gibberellins

Plant Development and Crop Yield: The Role of Gibberellins

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

Gibberellic acid promotes selenium accumulation in Cyphomandra betacea under selenium stress

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