Proline metabolic dynamics and implications in drought tolerance of peanut plants

Furlán, Ana; Bianucci, Eliana; Giordano, Walter; Castro, Stella; Becker, Donald F.

doi:10.1016/j.plaphy.2020.04.010

Cited by 157 publications

(86 citation statements)

References 107 publications

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“…Moreover, it can also act as an antioxidant in plants, thereby preventing oxidative stress and stabilizing cell membranes [ 13 ]. In peanuts, drought tolerance was associated with a high accumulation of proline biosynthesis [ 14 ]. Similarly, increased proline accumulation corresponded to less reduction in the relative water content and shoot and root fresh/dry weight in Indian grain soybean cultivars exposed to mild water stress [ 15 ].…”

Section: Discussionmentioning

confidence: 99%

Drought Tolerance Responses in Vegetable-Type Soybean Involve a Network of Biochemical Mechanisms at Flowering and Pod-Filling Stages

Moloi

Merwe

2021

Plants

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Severe drought stress affects the production of vegetable-type soybean (Glycine max L. Merrill), which is in infancy for Africa despite its huge nutritional benefits. This study was conducted under controlled environmental conditions to establish the effects of severe drought stress on ascorbate peroxidase (APX), guaiacol peroxidase (GPX), and glutathione reductase (GR) activities as well as proline, total soluble sugars (TSS), and hydrogen peroxide (H2O2) contents of five vegetable-type soybean cultivars (UVE8, UVE14, UVE17, AGS354, AGS429) at flowering and pod-filling stages. Drought induced significant increases in the contents of proline (selectively at pod filling for AGS429), TSS (at both stages for AGS429, and only at pod filling for UVE14), and malondialdehyde (AGS354 at flowering; UVE17 at pod filling). UVE8 and AGS354 had the highest H2O2 levels at flowering under drought stress, while AGS429 had the lowest. However, AGS429 was the only cultivar with significantly increased H2O2 under drought stress. Furthermore, drought stress induced significant increases in APX, GPX, and GR activities at flowering for AGS429. AGS354 recorded the highest decline for all antioxidative enzymes, while UVE17 decreased for GPX only. All biochemical parameters, except H2O2, were significantly higher at pod filling than at the flowering stage. The relationship between H2O2 and total seed mass (TSMP) or total seed per plant (TSP) was significantly positive for both stages, while that of TSS (at flowering) and proline (at pod filling) were significantly related to total pods per plant (TPP). The study suggests that during drought, the tolerance responses of vegetable-type soybean, APX, GPX, and GR (especially at the flowering stage), function in concert to minimize H2O2 production and lipid peroxidation, thereby allowing H2O2 to function in the signaling events leading to the induction of drought tolerance. The induction of TSS at flowering and proline at pod filling is important in the drought tolerance response of this crop.

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Section: Discussionmentioning

confidence: 99%

Drought Tolerance Responses in Vegetable-Type Soybean Involve a Network of Biochemical Mechanisms at Flowering and Pod-Filling Stages

Moloi

Merwe

2021

Plants

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“…tRNA for transferring of proline. Proline will accumulate under environmental stress, such as drought and high ultraviolet radiation (Dien et al, 2019;Furlan et al, 2020;Saradhi et al, 1995 Essential role in chloroplast biogenesis (Li et al, 2017) 77/84…”

Section: Potential Loci Of Local Adaptationmentioning

confidence: 99%

Responses of an endemic species (Roscoea humeana) in the Hengduan Mountains to climate change

Xue

Gugger

et al. 2021

Diversity and Distributions

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“…In our study, it was found that there was an increase in proline accumulation with the increase in drought severity. Moreover, it has been reported by other researchers that the proline synthesis increased under stress conditions (Çetin et al, 2011;Lum et al, 2014;Per et al, 2017;Ghaffari et al, 2019;Fiasconaro et al, 2019;Furlana et al, 2020).…”

Section: Resultsmentioning

confidence: 81%

Physiological and biochemical responses of almond rootstocks to drought stress

Yıldırım¹,

Şan²,

Yildirim³

et al. 2021

Turk J Agric For

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Water availability is a very important factor for the growth and development of plants, which limits the plant production capacity. Rootstocks are widely utilized to improve plants tolerance to various biotic and abiotic stresses. In this study, physiological and biochemical responses of fifteen almond rootstock candidates to drought stress were investigated under in vitro conditions. The shoot tips from fifteen almond rootstock candidates were cultured in MS medium containing 1.0 mg/L BAP, 0.01 mg/L IBA, 30 g/L sucrose and 7 g/L agar. Plantlets were exposed to 0%, 1% and 2% polyethyleneglycol (PEG) as drought stress levels during four weeks. At the end of the stress period, the genotypes were evaluated in terms of total number of shoots per explant, the proline, chlorophyll, total phenolics, total flavonoids and total protein contents, and the superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) enzyme activities of the shoots were determined. The results showed that the drought stress increased total flavanoids, phenolic compounds and proline contents, while it reduced the number of shoots, chlorphyll a, b and total chlorophyll contents. Moreover, the drought stress increased the activities of APX, CAT and SOD enzymes in all genotypes. On the other hand, it decreased the protein content in six genotypes but increased the protein content in the nine genotypes. Based on the results, it was observed that the almond genotypes were generally tolerant to the drought. However, it was determined that the genotypes numbered 9, 29 and 185 showed more tolerant to the drought as compared to the other genotypes. These results suggest that improving the antioxidant system can enhance the drought tolerance of rootstocks.

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Proline metabolic dynamics and implications in drought tolerance of peanut plants

Cited by 157 publications

References 107 publications

Drought Tolerance Responses in Vegetable-Type Soybean Involve a Network of Biochemical Mechanisms at Flowering and Pod-Filling Stages

Drought Tolerance Responses in Vegetable-Type Soybean Involve a Network of Biochemical Mechanisms at Flowering and Pod-Filling Stages

Responses of an endemic species (Roscoea humeana) in the Hengduan Mountains to climate change

Physiological and biochemical responses of almond rootstocks to drought stress

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