Changes induced by Cu2+ and Cr6+ metal stress in polyamines, auxins, abscisic acid titers and antioxidative enzymes activities of radish seedlings

Pal, Sikander; Bhardwaj, Renu; Gupta, B. K.; Dutt, Prabhu; Gupta, Rajinder K.; Kanwar, Mukesh Kumar; Dutt, Pitamber

doi:10.1590/s1677-04202010000400006

Cited by 23 publications

(20 citation statements)

References 55 publications

(43 reference statements)

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“…It is also shown that whenever there is Cr 6+ and Cu 2+ stress there is increase in the synthesis of exogenous or endogenous ABA level. It further shows that the participation of ABA ( Table 1 ) in heavy metal stress tolerance ( Choudhary et al, 2010 ). The application of silicon (Si) has been known to increase the plant’s tolerance capacity against abiotic stresses.…”

Section: Aba and Abiotic Stress Signalingmentioning

confidence: 80%

“…Heavy metals are the foremost pollutants of environment, i.e., soil and water. Levels of some heavy metals like Cd, Cu, Pb, Hg, and Cr are high in agricultural and other natural areas which are because of human activities ( Choudhary et al, 2010 ). Toxicity caused by heavy metals is the major cause of abiotic stress which leads humans, plants and animals to dangerous health effects ( Singh et al, 2015 , 2017 ; Tripathi et al, 2016a , 2017c ).…”

Section: Aba and Abiotic Stress Signalingmentioning

confidence: 99%

“…It is essential in low quantity for usual plant growth and development but it lead to phytotoxicity at high concentrations ( Berenguer et al, 2008 ). Against various biotic and abiotic stresses, plants develop a strong protection mechanism which consists the action of antioxidative enzymes by phytohormones such as auxins ( Park et al, 2007 ), cytokinins ( Zhang and Ervin, 2008 ), ABA ( Staneloni et al, 2008 ), ethylene, salicylates, jasmonic acid, brassinosteriods, and polyamines ( Choudhary et al, 2010 ).…”

Section: Aba and Abiotic Stress Signalingmentioning

confidence: 99%

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Abscisic Acid Signaling and Abiotic Stress Tolerance in Plants: A Review on Current Knowledge and Future Prospects

et al. 2017

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Abiotic stress is one of the severe stresses of environment that lowers the growth and yield of any crop even on irrigated land throughout the world. A major phytohormone abscisic acid (ABA) plays an essential part in acting toward varied range of stresses like heavy metal stress, drought, thermal or heat stress, high level of salinity, low temperature, and radiation stress. Its role is also elaborated in various developmental processes including seed germination, seed dormancy, and closure of stomata. ABA acts by modifying the expression level of gene and subsequent analysis of cis-and trans-acting regulatory elements of responsive promoters. It also interacts with the signaling molecules of processes involved in stress response and development of seeds. On the whole, the stress to a plant can be susceptible or tolerant by taking into account the coordinated activities of various stress-responsive genes. Numbers of transcription factor are involved in regulating the expression of ABA responsive genes by acting together with their respective cis-acting elements. Hence, for improvement in stresstolerance capacity of plants, it is necessary to understand the mechanism behind it. On this ground, this article enlightens the importance and role of ABA signaling with regard to various stresses as well as regulation of ABA biosynthetic pathway along with the transcription factors for stress tolerance.

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Section: Aba and Abiotic Stress Signalingmentioning

confidence: 80%

Section: Aba and Abiotic Stress Signalingmentioning

confidence: 99%

Section: Aba and Abiotic Stress Signalingmentioning

confidence: 99%

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Abscisic Acid Signaling and Abiotic Stress Tolerance in Plants: A Review on Current Knowledge and Future Prospects

et al. 2017

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“…45 Heavy metal stress, Cu-and chromium (Cr)-induced Put and Spd accumulation in plants afforded them protection against oxidative damage. 46 Salinity, osmotic, heat, and/or cold stress The first report of the accumulation of Put and Spd in oats (Avena sativa) cells and protoplasts by exposure to various osmotica (sorbitol, mannitol, proline, betaine, sucrose, etc. ), initiated PA research in response to osmotic stress.…”

Section: Metal Stressmentioning

confidence: 99%

Polyamines in response to abiotic stress tolerance through transgenic approaches

2014

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The distribution, growth, development and productivity of crop plants are greatly affected by various abiotic stresses. Worldwide, sustainable crop productivity is facing major challenges caused by abiotic stresses by reducing the potential yield in crop plants by as much as 70%. Plants can generally adapt to one or more environmental stresses to some extent. Physiological and molecular studies at transcriptional, translational, and transgenic plant levels have shown the pronounced involvement of naturally occurring plant polyamines (PAs), in controlling, conferring, and modulating abiotic stress tolerance in plants. PAs are small, low molecular weight, non-protein polycations at physiological pH, that are present in all living organisms, and that have strong binding capacity to negatively charged DNA, RNA, and different protein molecules. They play an important role in plant growth and development by controlling the cell cycle, acting as cell signaling molecules in modulating plant tolerance to a variety of abiotic stresses. The commonly known PAs, putrescine, spermidine, and spermine tend to accumulate together accompanied by an increase in the activities of their biosynthetic enzymes under a range of environmental stresses. PAs help plants to combat stresses either directly or by mediating a signal transduction pathway, as shown by molecular cloning and expression studies of PA biosynthesis-related genes, knowledge of the functions of PAs, as demonstrated by developmental studies, and through the analysis of transgenic plants carrying PA genes. This review highlights how PAs in higher plants act during environmental stress and how transgenic strategies have improved our understanding of the molecular mechanisms at play.

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“…Putrescine (Put), spermidine (Spd) and spermine (Spm) are the major PAs, and they are found in three forms: free (F-PAs), covalently conjugated (CC-PAs) or non-covalently conjugated (NCC-PAs) (Chen et al 2019). These participate in numerous fundamental processes, including cell division, seed germination, fruit growth and morphogenesis, in addition to which they alleviate damage resulting from environmental stresses such as HM stress, salinity and drought by regulating their tolerance mechanisms (Choudhary et al 2010;Gill & Tuteja 2010;Aldesuquy 2016).…”

Section: Introductionmentioning

confidence: 99%

Effect of N-acetyl-L-cysteine (NAC) on soluble sugar and polyamine content in wheat seedlings exposed to heavy metal stress (Cd, Hg and Pb)

2020

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Heavy metal stress adversely affects plant growth and productivity worldwide. Alleviating the stress effect through the exogenous use of various chemical substances has become an interesting area of study in the field of plant stress tolerance. As a thiol compound, the cysteine derivative N-acetylcysteine (N-acetyl- L-cysteine, NAC) is the precursor of glutathione synthesis and a potent ROS scavenger with powerful antioxidant and free radical scavenging capabilities. This study investigated the effects of heavy metals (Cd, Hg and Pb, 100 ?M) on accumulation of soluble sugars and polyamine content in roots and shoots of wheat seedlings, the water potential and proline content in shoots and the role of NAC in protection against heavy metal toxicity. The addition of 1 mM NAC significantly increased root content of glucose, fructose and sucrose in varying degrees (avg. 1.34-, 1.20- and 1.51-fold, respectively) in comparison with heavy metals alone. The treatments led to a significant reduction of sugar content in shoots. Water potential values were highly correlated with proline and sugar content in wheat seedling shoots. Heavy metal stress significantly reduced polyamine content in both plant parts. The addition of NAC increased polyamine content in seedlings in comparison with heavy metals alone in both roots and shoots. These results suggest that NAC may protect plants from oxidative stress damage in heavy metal stress, and this enhancement of stress tolerance seems to involve soluble sugar and polyamine biosynthesis.

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Changes induced by Cu2+ and Cr6+ metal stress in polyamines, auxins, abscisic acid titers and antioxidative enzymes activities of radish seedlings

Cited by 23 publications

References 55 publications

Abscisic Acid Signaling and Abiotic Stress Tolerance in Plants: A Review on Current Knowledge and Future Prospects

Abscisic Acid Signaling and Abiotic Stress Tolerance in Plants: A Review on Current Knowledge and Future Prospects

Polyamines in response to abiotic stress tolerance through transgenic approaches

Effect of N-acetyl-L-cysteine (NAC) on soluble sugar and polyamine content in wheat seedlings exposed to heavy metal stress (Cd, Hg and Pb)

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