Salt acclimation in sorghum plants by exogenous proline: physiological and biochemical changes and regulation of proline metabolism

Freitas, Paulo André Ferreira de; Carvalho, Humberto Henrique de; Costa, José Hélio; Miranda, Rafael de Souza; Saraiva, Kátia Daniella da Cruz; Oliveira, Francisco Dalton Barreto de; Coelho, Daniel Gomes; Prisco, José Tarquı́nio; Gomes-Filho, Enéas

doi:10.1007/s00299-019-02382-5

Cited by 84 publications

(50 citation statements)

References 63 publications

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“…Pro application caused an increase in stomatal conductance by maintaining appropriate cellular turgor (Wani et al, 2019). De Freitas et al (2019) found that exogenously Pro elevated K + and Ca + accumulation which likely acted in membrane stability and water content, thus regulated stomatal conductance of sorghum plants under salinity stress. Rady et al (2018) also demonstrated that foliar application of GB as an osmoprotectant increased the stomatal conductance of salt-stressed onion plants via maintaining the endogenous available water.…”

Section: Discussionmentioning

confidence: 99%

Cadmium Toxicity Alleviates by Seed Priming with Proline or Glycine Betaine in Cowpea ( Vigna unguiculata (L.) Walp.)

Sadeghipour

2020

Egypt. J. Agron.

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C ADMIUM (Cd) as a non-essential metal is a soil pollutant that inhibits plant growth and development. Proline (Pro) and Glycine betaine (GB) are two important compatible solutes that accumulate in response to abiotic stresses in different plant species. Here, a pot experiment was carried out to assess the role of exogenously applied Pro and GB in improving Cd toxicity tolerance in cowpea plants. Seeds were soaked in 0, 25 and 50mM Pro or GB, and then were sown in plastic pots that were irrigated with 0 or 100µM cadmium chloride. Results showed that Cd stress markedly decreased shoot length, shoot biomass, leaf area, chlorophyll value, stomatal conductance and relative water content (RWC) but increased root and shoot Cd levels, malondialdehyde (MDA) content and antioxidant enzyme activities such as superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX). Nevertheless, seed treatment with Pro or GB reduced Cd toxicity and improved growth attributes via reducing Cd uptake and translocation, increasing the chlorophyll value, stomatal conductance, and RWC as well as more enhancing the activities of antioxidant enzymes and lowering the MDA level. Although both Pro and GB were effective, pre-treatment of seeds with Pro improved Cd stress tolerance better than GB. Thus, seed treatment with Pro (especially 50mM) could be used as an effective method for protecting cowpea plants against Cd toxicity.

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Section: Discussionmentioning

confidence: 99%

Cadmium Toxicity Alleviates by Seed Priming with Proline or Glycine Betaine in Cowpea ( Vigna unguiculata (L.) Walp.)

Sadeghipour

2020

Egypt. J. Agron.

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“…In addition, exogenous proline supply significantly increased plant height and number of roots in salt stressed O. sativa (Teh et al, 2016). Likewise, application of proline increased dry mass of leaves and roots and their soluble protein contents in salt stressed Z. mays (de Freitas et al, 2018). In some cases, exogenous proline stimulates yield under salt stress.…”

Section: Effects Of Proline Treatment On Plant Growth and Biomass Undmentioning

confidence: 91%

“…Application of 5 mM proline in a foliar spray decreased Na + content and increased K + /Na + ratio in P. vulgaris (Abdelhamid et al, 2013). More recently, de Freitas et al (2018) reported that external application of proline decreased both Na + and Cl − contents, but increased the K + content and the K + /Na + ratio in salt-stressed Z. mays. Similar results have been reported in S. bicolor (de Freitas et al, 2019).…”

Section: Proline Treatment Mediates Reduction In Ion Toxicity Due To mentioning

confidence: 97%

“…More recently, de Freitas et al (2018) reported that external application of proline decreased both Na + and Cl − contents, but increased the K + content and the K + /Na + ratio in salt-stressed Z. mays. Similar results have been reported in S. bicolor (de Freitas et al, 2019). Khan et al (2014) demonstrated that exogenous proline alleviated the negative effect of 120 mM salt, and enhanced K + content, and reduced Na + concentration in H. annuus.…”

Section: Proline Treatment Mediates Reduction In Ion Toxicity Due To mentioning

confidence: 99%

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How Does Proline Treatment Promote Salt Stress Tolerance During Crop Plant Development?

et al. 2020

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Soil salinity is one of the major abiotic stresses restricting the use of land for agriculture because it limits the growth and development of most crop plants. Improving productivity under these physiologically stressful conditions is a major scientific challenge because salinity has different effects at different developmental stages in different crops. When supplied exogenously, proline has improved salt stress tolerance in various plant species. Under high-salt conditions, proline application enhances plant growth with increases in seed germination, biomass, photosynthesis, gas exchange, and grain yield. These positive effects are mainly driven by better nutrient acquisition, water uptake, and biological nitrogen fixation. Exogenous proline also alleviates salt stress by improving antioxidant activities and reducing Na + and Cl − uptake and translocation while enhancing K + assimilation by plants. However, which of these mechanisms operate at any one time varies according to the proline concentration, how it is applied, the plant species, and the specific stress conditions as well as the developmental stage. To position salt stress tolerance studies in the context of a crop plant growing in the field, here we discuss the beneficial effects of exogenous proline on plants exposed to salt stress through wellknown and more recently described examples in more than twenty crop species in order to appreciate both the diversity and commonality of the responses. Proposed mechanisms by which exogenous proline mitigates the detrimental effects of salt stress during crop plant growth are thus highlighted and critically assessed.

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“…To measure the content of Na+, the leaves were incinerated and the ash was dissolved in 0.5 M HCl solution before the concentration of Na+ was determined as described in [63]. The content of MDA and proline was also measured according to previously described protocols [22,64].…”

Section: Physiological Assaymentioning

confidence: 99%

Transcriptomic basis for salt tolerance and disease resistance of silverleaf sunflower revealed by Iso-seq and RNA-seq

Jing

Ling

et al. 2019

Preprint

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Background Silverleaf sunflower, Helianthus argophyllus , is one of the most important wild species that have been usually used for the improvement of cultivated sunflower. Although a reference genome is now available for the cultivated species, H. annuus , its effect in helping understanding the mechanisms underlying the traits of H. argophyllus is limited by the substantial genomic variance between these two species.Results In this study, we generated a high-quality reference transcriptome of H. argophyllus using Iso-seq strategy. This assembly contains 50,153 unique genes covering more than 91% of the whole genes. Among them, we find 205 genes that are absent in the cultivated species and 475 fusion genes containing components of coding or non-coding sequences from the genome of H. annuus . It is interesting that in line with the strong disease resistance observed for H. argophyllus , these H. argophyllus -specific genes are predominantly related to functions of resistance. We have also profiled the gene expressions in leaf and root under normal or salt stressed conditions and, as a result, find distinct transcriptomic responses to salt stress in leaf and root. Particularly, genes involved in several critical processes including the synthesis and metabolism of glutamate and carbohydrate transport are reversely regulated in leaf and root.Conclusions Overall, this study provided insights into the genomic mechanisms underlying the disease resistance and salt tolerance of silverleaf sunflower and the transcriptome assembly and the genes identified in this study can serve as a complement data resources for future research and breeding programs of sunflowers.

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Salt acclimation in sorghum plants by exogenous proline: physiological and biochemical changes and regulation of proline metabolism

Cited by 84 publications

References 63 publications

Cadmium Toxicity Alleviates by Seed Priming with Proline or Glycine Betaine in Cowpea ( Vigna unguiculata (L.) Walp.)

Cadmium Toxicity Alleviates by Seed Priming with Proline or Glycine Betaine in Cowpea ( Vigna unguiculata (L.) Walp.)

How Does Proline Treatment Promote Salt Stress Tolerance During Crop Plant Development?

Transcriptomic basis for salt tolerance and disease resistance of silverleaf sunflower revealed by Iso-seq and RNA-seq

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