Physiological changes for drought resistance in different species of Phyllanthus

Filho, Elenilson G. Alves; Braga, Luiza N.; Silva, Lorena; Miranda, F. R. de; Silva, Ebenézer O.; Canuto, Kirley Marques; Miranda, Maria Raquel Alcântara de; Brito, Edy Sousa de; Zocolo, Guilherme Julião

doi:10.1038/s41598-018-33496-7

Cited by 13 publications

(11 citation statements)

References 60 publications

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“…The excised leaves of turnip, 76 bean, 77 soybean 78 and sesame 79 plants subjected to drought stress raised their GABA levels. Drought has also been shown to induce high levels of GABA in tomato, 80 Phyllanthus species, 81 and creeping bentgrass. 82 The Arabidopsis gad1/2 mutant has shown remarkably reduced GABA content, large stomata aperture, and defective stomata closure.…”

Section: Abiotic and Biotic Stressmentioning

confidence: 99%

The versatile GABA in plants

Dou

Zhang

et al. 2021

Plant Signaling & Behavior

199

100

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Gamma-aminobutyric acid (GABA) is a ubiquitous four-carbon, non-protein amino acid. GABA has been widely studied in animal central nervous systems, where it acts as an inhibitory neurotransmitter. In plants, it is metabolized through the GABA shunt pathway, a bypass of the tricarboxylic acid (TCA) cycle. Additionally, it can be synthesized through the polyamine metabolic pathway. GABA acts as a signal in Agrobacterium tumefaciens -mediated plant gene transformation and in plant development, especially in pollen tube elongation (to enter the ovule), root growth, fruit ripening, and seed germination. It is accumulated during plant responses to environmental stresses and pathogen and insect attacks. A high concentration of GABA elevates plant stress tolerance by improving photosynthesis, inhibiting reactive oxygen species (ROS) generation, activating antioxidant enzymes, and regulating stomatal opening in drought stress. The transporters of GABA in plants are reviewed in this work. We summarize the recent research on GABA function and transporters with the goal of providing a review of GABA in plants.

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Section: Abiotic and Biotic Stressmentioning

confidence: 99%

The versatile GABA in plants

Dou

Zhang

et al. 2021

Plant Signaling & Behavior

199

100

View full text Add to dashboard Cite

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“…In maize leaves, alanine and other amino acids accumulated during drought, although the response of these compounds varied depending on the cultivar, organ, and developmental stage [78]. In two Phyllanthus species, drought stress increased the levels of several organic acids and amino acids, including alanine, which worked as an osmoprotectant [79].…”

Section: Metabolomic Analysismentioning

confidence: 99%

Water Deficit Affects the Growth and Leaf Metabolite Composition of Young Loquat Plants

Gugliuzza

Talluto

Martinelli

et al. 2020

Plants

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Water scarcity in the Mediterranean area is very common and understanding responses to drought is important for loquat management and production. The objective of this study was to evaluate the effect of drought on the growth and metabolism of loquat. Ninety two-year-old plants of ‘Marchetto’ loquat grafted on quince were grown in the greenhouse in 12-liter pots and three irrigation regimes were imposed starting on 11 May and lasting until 27 July, 2013. One-third of the plants was irrigated with 100% of the water consumed (well watered, WW), a second group of plants was irrigated with 66% of the water supplied to the WW plants (mild drought, MD), and a third group was irrigated with 33% of the water supplied to the WW plants (severe drought, SD). Minimum water potential levels of −2.0 MPa were recorded in SD plants at the end of May. Photosynthetic rates were reduced according to water supply (WW > MD > SD), especially during the morning hours. By the end of the trial, severe drought reduced all growth parameters and particularly leaf growth. Drought induced early accumulation of sorbitol in leaves, whereas other carbohydrates were not affected. Of over 100 leaf metabolites investigated, 9 (squalene, pelargonic acid, glucose-1-phosphate, palatinol, capric acid, aconitic acid, xylitol, lauric acid, and alanine) were found to be useful to discriminate between the three irrigation groups, suggesting their involvement in loquat metabolism under drought conditions. Loquat behaved as a moderately drought-tolerant species (limited stem water potential and growth reductions) and the accumulation of sorbitol in favor of sucrose in mildly-stressed plants may be considered an early protective mechanism against leaf dehydration and a potential biochemical marker for precise irrigation management.

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“…The physiological adaptation is usually accompanied with significant changes in oxidative and antioxidant metabolism, and an escalation of proline content and scavenging capacity of reactive oxygen species (ROS) through transgenic approach always leads to augmented stress tolerance [44,45]. Sometimes stress can increase the levels of some metabolites such as glucose, proline, and corilagin [46]. As reported, chloroplastically localized Os3BGlu6 significantly affects cellular ABA pools, which changes drought tolerance in rice [47].…”

Section: Discussionmentioning

confidence: 98%

Overexpression of BplERD15 Enhances Drought Tolerance in Betula platyphylla Suk.

Wei

Jiang

2020

Forests

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In this study, we report the cloning and functional characterization of an early responsive gene, BplERD15, from Betula platyphylla Suk to dehydration. BplERD15 is located in the same branch as Morus indica Linnaeus ERD15 and Arabidopsis Heynh ERD15 in the phylogenetic tree built with ERD family protein sequences. The tissue-specific expression patterns of BplERD15 were characterized using qRT-PCR and the results showed that the transcript levels of BplERD15 in six tissues were ranked from the highest to the lowest levels as the following: mature leaves (ML) > young leaves (YL) > roots (R) > buds (B) > young stems (YS) > mature stems (MS). Multiple drought experiments were simulated by adding various osmotica including polyethylene glycol, mannitol, and NaCl to the growth media to decrease their water potentials, and the results showed that the expression of BplERD15 could be induced to 12, 9, and 10 folds, respectively, within a 48 h period. However, the expression level of BplERD15 was inhibited by the plant hormone abscisic acid in the early response and then restored to the level of control. The BplERD15 overexpression (OE) transgenic birch lines were developed and they did not exhibit any phenotypic anomalies and growth deficiency under normal condition. Under drought condition, BplERD15-OE1, 3, and 4 all displayed some drought tolerant characteristics and survived from the drought while the wild type (WT) plants withered and then died. Analysis showed that all BplERD15-OE lines had significant lower electrolyte leakage levels as compared to WT. Our study suggests that BplERD15 is a drought-responsive gene that can reduce mortality under stress condition.

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Physiological changes for drought resistance in different species of Phyllanthus

Cited by 13 publications

References 60 publications

The versatile GABA in plants

The versatile GABA in plants

Water Deficit Affects the Growth and Leaf Metabolite Composition of Young Loquat Plants

Overexpression of BplERD15 Enhances Drought Tolerance in Betula platyphylla Suk.

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