A Study on the Accumulation of Proline - An Osmoprotectant Amino Acid under Salt Stress in Some Native Rice Cultivars of North Kerala, India

Joseph, E. Abhilash; Radhakrishnan, V.V.; Mohanan, K. V.

doi:10.13189/ujar.2015.030104

Cited by 29 publications

(18 citation statements)

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“…Its accumulation is linearly related to stress tolerance in plants [169]. Proline biosynthesis is reported to be mediated by Ca [170][171][172] and abscisic acid [8]. Previously, contrasting views about proline accumulation were also reported in plants under stress [19,158], where it appeared as a salt stress injury symptom, e.g., rice [173] and sorghum [174].…”

Section: Salinity and Prolinementioning

confidence: 99%

Insights into the Physiological and Biochemical Impacts of Salt Stress on Plant Growth and Development

et al. 2020

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Climate change is causing soil salinization, resulting in crop losses throughout the world. The ability of plants to tolerate salt stress is determined by multiple biochemical and molecular pathways. Here we discuss physiological, biochemical, and cellular modulations in plants in response to salt stress. Knowledge of these modulations can assist in assessing salt tolerance potential and the mechanisms underlying salinity tolerance in plants. Salinity-induced cellular damage is highly correlated with generation of reactive oxygen species, ionic imbalance, osmotic damage, and reduced relative water content. Accelerated antioxidant activities and osmotic adjustment by the formation of organic and inorganic osmolytes are significant and effective salinity tolerance mechanisms for crop plants. In addition, polyamines improve salt tolerance by regulating various physiological mechanisms, including rhizogenesis, somatic embryogenesis, maintenance of cell pH, and ionic homeostasis. This research project focuses on three strategies to augment salinity tolerance capacity in agricultural crops: salinity-induced alterations in signaling pathways; signaling of phytohormones, ion channels, and biosensors; and expression of ion transporter genes in crop plants (especially in comparison to halophytes).

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Section: Salinity and Prolinementioning

confidence: 99%

Insights into the Physiological and Biochemical Impacts of Salt Stress on Plant Growth and Development

et al. 2020

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“…Under salt stress L-proline prevents aggregation of P39A cellular retinoic acid binding protein (Ignatova and Gierasch, 2006). L-proline accumulation results in enhancing the cellular osmolarity that increases water influx and reduces efflux thus, provides pressure potential that is needed for cell expansion (Joseph et al, 2015).…”

Section: Effect Of Exogenous L-proline On Plant-water Relation and Photosynthesismentioning

confidence: 99%

Regulation of L-proline biosynthesis, signal transduction, transport, accumulation and its vital role in plants during variable environmental conditions

Meena

Divyanshu

Kumar

et al. 2019

Heliyon

332

128

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BackgroundIn response to various environmental stresses, many plant species synthesize L-proline in the cytosol and accumulates in the chloroplasts. L-Proline accumulation in plants is a well-recognized physiological reaction to osmotic stress prompted by salinity, drought and other abiotic stresses. L-Proline plays several protective functions such as osmoprotectant, stabilizing cellular structures, enzymes, and scavenging reactive oxygen species (ROS), and keeps up redox balance in adverse situations. In addition, ample-studied osmoprotective capacity, L-proline has been also ensnared in the regulation of plant improvement, including flowering, pollen, embryo, and leaf enlargement.Scope and conclusionsAlbeit, ample is now well-known about L-proline metabolism, but certain characteristics of its biological roles are still indistinct. In the present review, we discuss the L-proline accumulation, metabolism, signaling, transport and regulation in the plants. We also discuss the effects of exogenous L-proline during different environmental conditions. L-Proline biosynthesis and catabolism are controlled by several cellular mechanisms, of which we identify only very fewer mechanisms. So, in the future, there is a requirement to identify such types of cellular mechanisms.

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“…Altos níveis de prolina permitem que a planta sobreviva em baixos potenciais hídricos. Além de agir como osmoprotetor, a prolina tem a capacidade de eliminar as espécies reativas de oxigênio (EROS) e proteger a célula do dano oxidativo (JOGAIAH et al, 2013;JOSEPH et al, 2015). Também é relatado que a prolina protege o mecanismo fotossintético e age como armazenamento de energia sob estresse de NaCl (KHAN et al, 2013, REDDY et al, 2015AHMAD et al, 2016).…”

Section: Resultsunclassified

Crescimento inicial e resposta estomática de milho pipoca sob estresse salino

Cruz¹,

Jesus²,

Ferrari³

et al. 2019

COLLOQ AGRARIAE

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ResumoA salinidade se destaca como um problema de grande importância, pois pode limitar o desenvolvimento e a produção agrícola. O estresse salino em plantas pode afetar o seu metabolismo, além de estimular o acúmulo de osmólitos. Portanto, o objetivo desse trabalho foi avaliar o crescimento, mudanças fisiológicas e estomáticas de plantas de milho pipoca submetidas ao estresse salino. O experimento foi inteiramente casualizado, com 6 vasos por tratamento, conduzido em câmera de crescimento e irrigadas com NaCl nas concentrações de 0, 100 e 200 mM por 15 dias. As concentrações de 100 mM e 200 mM de NaCl, ocasionaram reduções significavas na altura e massa fresca da parte aérea e raízes. Observamos um aumento do dano na membrana plasmática e consequentemente uma redução no teor relativo de água nas folhas, devido às mudanças ocorridas na atividade osmótica. Além disso, houve o acúmulo de prolina, aumento no teor de clorofila e um aumento significativo no número de estômatos na superfície abaxial, assim como uma redução do tamanho dos estômatos. As plantas apresentaram um conjunto de alterações morfológicas e fisiológicas que são um mecanismo de defesa contra os efeitos da salinidade. Nossos resultados demonstraram que essas características contribuíram para uma notável tolerância à salinidade, pois possuem um importante papel protetor contra os diferentes estresses ambientais. Palavras-chave: adaptações estomáticas; estresse ambiental; tolerância; salinidade; Zea mays everta. Initial growth and stomatal response of popcorn (Zea mays everta) under salt stress AbstractSalinity stands out as a major problem environmental that it may limit agricultural development and productivity. Saline stress in plants can affect your metabolism, in addition to stimulating the accumulation of osmolytes. Therefore, the aim is study was to evaluate the growth and extend our understanding physiological and stomatal changes in popcorn plants submitted to salinity stress. The experiment was completely randomized, with 6 pots per treatment, conducted in a growth chamber and irrigated with NaCl at the concentrations 0, 100 and 200 mM for 15 days. 100 and 200 mM NaCl concentrations cause significant reductions in height and fresh mass of shoots and roots. We observe an increase in the plasma membrane damage and consequently a reduction in relative water content in the leaves due to changes in the osmotic activity. Accordingly, an involvement there was a proline accumulation, increase in chlorophyll content and a significant increase in a number of stomata on abaxial surface, as well as a reduction in the size of the stomata. Plants presented a set of morphological and physiological changes, triggering a defense mechanism against the effects of salinity. Finally, our results demonstrated that these characteristics contributed to a remarkable tolerance to salinity since they have an important protective role against the different environmental stresses.

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A Study on the Accumulation of Proline - An Osmoprotectant Amino Acid under Salt Stress in Some Native Rice Cultivars of North Kerala, India

Cited by 29 publications

References 56 publications

Insights into the Physiological and Biochemical Impacts of Salt Stress on Plant Growth and Development

Insights into the Physiological and Biochemical Impacts of Salt Stress on Plant Growth and Development

Regulation of L-proline biosynthesis, signal transduction, transport, accumulation and its vital role in plants during variable environmental conditions

Crescimento inicial e resposta estomática de milho pipoca sob estresse salino

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