Proline: a key player in plant abiotic stress tolerance

Kaur, Gagandeep; Asthir, Bavita

doi:10.1007/s10535-015-0549-3

Cited by 532 publications

(324 citation statements)

References 102 publications

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“…Proline is a component of the defense system in living organisms against oxidative stress and accumulates in organisms under heavy metals exposure. It is known that accumulation of proline under stress conditions has a role as membrane fixing agent . In the present study, proline content was significantly affected by application of TiO 2 nanoparticles at which the maximum proline content was determined for 5 mg kg −1 (17.0 μmol g −1 FW) ( p < 0.05).…”

Section: Resultsmentioning

confidence: 52%

“…It is known that accumulation of proline under stress conditions has a role as membrane fixing agent. [15,42,44,46] In the present study, proline content was significantly affected by application of TiO 2 nanoparticles at which the maximum proline content was determined for 5 mg kg À1 (17.0 μmol g À1 FW) (p < 0.05). On the other hand, the proline content tended to decrease in ZnO nanoparticles treated plants in comparison to control plants (p > 0.05) (Figure 8a and b).…”

Section: Proline and Glutathione Levelsmentioning

confidence: 50%

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TiO₂ and ZnO Nanoparticles Toxicity in Barley (Hordeum vulgare L.)

Doğaroğlu

Köleli

2017

CLEAN Soil Air Water

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In this study, the effects of TiO2 and ZnO nanoparticles (0, 5, 10, 20, 40, and 80 mg kg−1) on seed germination, root elongation, chlorophyll content, and the activities of antioxidant enzymes of barley (Hordeum vulgare L.) are studied. The number of seeds germinated and roots elongated in germinated plants (tillering stage) are determined on day 7. Seedlings are transferred to pots containing 50 g turf and grown for 21 days. Antioxidant levels (superoxide dismutase, catalase, ascorbate peroxidase, glutathione, and proline) are determined on day 21 after planting. The results shows that seed germination and root elongation are not significantly affected by types and concentrations of ZnO and TiO2 nanoparticles. However, the antioxidant enzyme activities are diversely affected. Furthermore, the results also show that the ZnO nanoparticles are more toxic to barley plants than the TiO2 nanoparticles.

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Section: Resultsmentioning

confidence: 52%

Section: Proline and Glutathione Levelsmentioning

confidence: 50%

TiO₂ and ZnO Nanoparticles Toxicity in Barley (Hordeum vulgare L.)

Doğaroğlu

Köleli

2017

CLEAN Soil Air Water

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“…The functions of proline in the tolerance to stress are still a topic of debate, since its synthesis and catabolism are regulated by multiple cell mechanisms, of which only a few are known (Bhaskara et al, 2015). Proline has been known to contribute to stabilization of subcellular structures, elimination of free radicals and buffering of the cell redox potential (Kaur & Asthir, 2015).…”

Section: Resultsmentioning

confidence: 99%

Production and antioxidative metabolism in bell pepper grown with saline water in hydroponic system

Lima

Morais

Silva

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to evaluate the effect of salt stress on production and antioxidative defense metabolism of two bell pepper cultivars (Capsicum annuum L.) grown hydroponically. The experimental design was in randomized blocks, with treatments arranged in a 5 x 2 factorial scheme with five replicates. The treatments consisted of five salinity levels of the nutrient solution (2.0, 3.5, 4.5, 5.5 and 6.5 dS m -1 ) with two bell pepper cultivars, 'Bruno' and 'Rúbia' . Biomass and yield were reduced with increasing salinity. The contents of chlorophyll a, b and total decreased with increasing salinity. There was an increase in proline content and activity of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX), showing the activation of the antioxidant defense mechanism. The higher yield in the cv. 'Rúbia' , as well as the greater activity of the APX and the lower levels of chlorophyll content, reflect the best acclimatization of this cultivar to saline stress. The estimated yield of the cv. 'Rúbia' , 39.9 t ha -1 when grown with ECs of up to 3.5 dS m -1, indicates the feasibility of its commercial cultivation in hydroponic conditions. Produção e metabolismo antioxidativo em pimentão cultivado com água salina em sistema hidropônico R E S U M O Este trabalho foi realizado com o objetivo de avaliar o efeito do estresse salino sobre a produção e o metabolismo de defesa antioxidativa de duas cultivares de pimentão (Capsicum annuum L.), cultivadas em sistema hidropônico. O delineamento experimental foi em blocos casualizados, com os tratamentos arranjados em esquema fatorial 5 x 2, com cinco repetições. Os tratamentos consistiram da combinação de cinco níveis de salinidade da solução nutritiva (2,0; 3,5; 4,5; 5,5 e 6,5 dS m -1 ) com duas cultivares de pimentão (Bruno e Rúbia). A biomassa e a produção foram reduzidas com o incremento da salinidade. Os teores de clorofila a, b e total, diminuíram com o aumento da salinidade. Houve aumento no teor de prolina e na atividade das enzimas superóxido dismutase (SOD), catalase (CAT) e ascorbato peroxidase (APX), evidenciando a ativação do mecanismo de defesa antioxidativo. A maior produção de frutos na cv. Rúbia, bem como a maior atividade da APX e os menores teores de clorofilas refletem a melhor aclimatação desta cultivar ao estresse salino. A produtividade estimada da cv. Rúbia, 39,8 t ha , indica a viabilidade de seu cultivo comercial em condições hidropônicas.

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“…, Banu et al. , Kaur and Asthir ), as well as is involved in alleviating NaCl‐ and ROS‐induced K + efflux from cells, cell death (Cuin and Shabala , Demidschik et al. ).…”

Section: Discussionmentioning

confidence: 99%

Na⁺ Retention in the Root is a Key Adaptive Mechanism to Low and High Salinity in the Glycophyte, Talinum paniculatum (Jacq.) Gaertn. (Portulacaceae)

Assaha

Mekawy

Liu

et al. 2016

J Agronomy Crop Science

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Talinum paniculatum is an important leafy vegetable and medicinal plant, used in many parts of South America, Africa and Asia. Its adaptation to abiotic stress has received little attention and therefore worthy of interest, especially as environmental conditions are rendering arable lands increasingly unfavourable for agriculture. Therefore, this study was undertaken to examine the influence of salt stress on the vegetative growth of the plant by subjecting seedlings to 0, 25, 50, 100, 200 and 300 mm NaCl stress for 10 days. The dry weight, ion concentrations, relative water content, oxidative damage, proline, osmotic potential and some antioxidants were determined. The plants were found to retain Na+ mainly in the root, with less affected leaf K+ concentration, and consequently very low shoot Na+/K+ ratios (<0.2) under all the stress treatments. The proline content significantly increased under the 100–300 mm treatments (18‐ to 244‐fold), with a corresponding significant reduction in osmotic potential and hence high osmotic adjustment. The antioxidant enzyme activities and non‐enzyme antioxidants showed significant increase only under the highest salinity. Taken together, these results suggest that shoot Na+ exclusion is characteristic of this plant and is mainly responsible for its adaptation to low salinity.

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Proline: a key player in plant abiotic stress tolerance

Cited by 532 publications

References 102 publications

TiO₂ and ZnO Nanoparticles Toxicity in Barley (Hordeum vulgare L.)

TiO₂ and ZnO Nanoparticles Toxicity in Barley (Hordeum vulgare L.)

Production and antioxidative metabolism in bell pepper grown with saline water in hydroponic system

Na⁺ Retention in the Root is a Key Adaptive Mechanism to Low and High Salinity in the Glycophyte, Talinum paniculatum (Jacq.) Gaertn. (Portulacaceae)

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Proline: a key player in plant abiotic stress tolerance

Cited by 532 publications

References 102 publications

TiO2 and ZnO Nanoparticles Toxicity in Barley (Hordeum vulgare L.)

TiO2 and ZnO Nanoparticles Toxicity in Barley (Hordeum vulgare L.)

Production and antioxidative metabolism in bell pepper grown with saline water in hydroponic system

Na+ Retention in the Root is a Key Adaptive Mechanism to Low and High Salinity in the Glycophyte, Talinum paniculatum (Jacq.) Gaertn. (Portulacaceae)

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About

TiO₂ and ZnO Nanoparticles Toxicity in Barley (Hordeum vulgare L.)

TiO₂ and ZnO Nanoparticles Toxicity in Barley (Hordeum vulgare L.)

Na⁺ Retention in the Root is a Key Adaptive Mechanism to Low and High Salinity in the Glycophyte, Talinum paniculatum (Jacq.) Gaertn. (Portulacaceae)