Interaction between Hormone and Redox Signaling in Plants: Divergent Pathways and Convergent Roles

Srivastava, A. K.; Redij, T; Sharma, Bhupat; Suprasanna, Penna

doi:10.1002/9781118889022.ch19

Cited by 4 publications

(6 citation statements)

References 97 publications

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“…In Cakile maritima , methyl jasmonate and salicylic acid are shown to be involved in the amelioration of Cd induced toxicity along with osmolytes such as proline and betaine ( Taamalli et al, 2015 ). In a metallophyte Brassica juncea , Srivastava et al (2015) have shown that ‘Arsenic’ (As) stress imposes toxicity by altering levels of auxins and expression of different microRNAs. In addition, exogenous supplementation of IAA improved growth of hyperaccumulator plant, Brassica under ‘As’ stress which confirms role of hormones in managing ‘As’ induced alterations in plant cell ( Srivastava et al, 2015 ).…”

Section: Plant Responses To Metal Stressmentioning

confidence: 99%

“…In a metallophyte Brassica juncea , Srivastava et al (2015) have shown that ‘Arsenic’ (As) stress imposes toxicity by altering levels of auxins and expression of different microRNAs. In addition, exogenous supplementation of IAA improved growth of hyperaccumulator plant, Brassica under ‘As’ stress which confirms role of hormones in managing ‘As’ induced alterations in plant cell ( Srivastava et al, 2015 ). The crucial role of hormonal modulations during stress adaptation in halophytes need to be studied to understand their interactions with different pathways of signaling, defense and cross talk.…”

Section: Plant Responses To Metal Stressmentioning

confidence: 99%

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Coping With Metal Toxicity – Cues From Halophytes

Nikalje

Suprasanna

2018

Front. Plant Sci.

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Being the native flora of saline soil, halophytes are well studied for their salt tolerance and adaptation mechanism at the physiological, biochemical, molecular and metabolomic levels. However, these saline habitats are getting contaminated due to various anthropogenic activities like urban waste, agricultural runoff, mining, industrial waste that are rich in toxic metals and metalloids. These toxic metals impose detrimental effects on growth and development of most plant species. Halophytes by virtue of their tolerance to salinity also show high tolerance to heavy metals which is attributed to the enhanced root to shoot metal translocation and bioavailability. Halophytes rapidly uptake toxic ions from the root and transport them toward aerial parts by using different transporters which are involved in metal tolerance and homeostasis. A number of defense related physiological and biochemical strategies are known to be crucial for metal detoxification in halophytes however; there is paucity of information on the molecular regulators. Understanding of the phenomenon of cross-tolerance of salinity with other abiotic stresses in halophytes could very well boost their potential use in phytoremediation. In this article, we present an overview of heavy metal tolerance in case of halophytes, associated mechanisms and cross-tolerance of salinity with other abiotic stresses.

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Section: Plant Responses To Metal Stressmentioning

confidence: 99%

Section: Plant Responses To Metal Stressmentioning

confidence: 99%

Coping With Metal Toxicity – Cues From Halophytes

Nikalje

Suprasanna

2018

Front. Plant Sci.

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“…Redox signals modulate plant hormone synthesis, sequestration, and signal transduction. Phytohormones subject to redox modulation include abscisic acid, auxins, brassinosteroids, cytokinins, gibberellins, ethylene, salicylic acid, and jasmonic acid [ 16 , 47 , 48 , 49 , 50 , 51 ].…”

Section: Transcription Factors Co-optimize Productivity and Stressmentioning

confidence: 99%

Optimization of Photosynthetic Productivity in Contrasting Environments by Regulons Controlling Plant Form and Function

Adams

Stewart

Baker

2018

IJMS

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We review the role of a family of transcription factors and their regulons in maintaining high photosynthetic performance across a range of challenging environments with a focus on extreme temperatures and water availability. Specifically, these transcription factors include CBFs (C-repeat binding factors) and DREBs (dehydration-responsive element-binding), with CBF/DREB1 primarily orchestrating cold adaptation and other DREBs serving in heat, drought, and salinity adaptation. The central role of these modulators in plant performance under challenging environments is based on (i) interweaving of these regulators with other key signaling networks (plant hormones and redox signals) as well as (ii) their function in integrating responses across the whole plant, from light-harvesting and sugar-production in the leaf to foliar sugar export and water import and on to the plant’s sugar-consuming sinks (growth, storage, and reproduction). The example of Arabidopsis thaliana ecotypes from geographic origins with contrasting climates is used to describe the links between natural genetic variation in CBF transcription factors and the differential acclimation of plant anatomical and functional features needed to support superior photosynthetic performance in contrasting environments. Emphasis is placed on considering different temperature environments (hot versus cold) and light environments (limiting versus high light), on trade-offs between adaptations to contrasting environments, and on plant lines minimizing such trade-offs.

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“…These molecules then release SNF1 related protein kinase 2 by negative regulation to phosphorylate ABA- responsive element- binding transcription factors (ABRE- ABFs). The OPEN STOMATA1 ( OST1 ) gene in the presence of ABA gets activated and phosphorylates SLOW ANION CHANNEL-ASSOCIATED1 anion channel which closes stomata by releasing stomata from guard cells (Reviewed by [ 69 ]. This OST1 gene also interacts with NADPH oxidase which catalyzes ROS production, such as superoxides and hydrogen peroxides.…”

Section: Hormonal Regulationmentioning

confidence: 99%

“…The Salicylic Acid (SA) is a phenolic hormone, involved in various physiological processes during growth, development and stress management [ 69 ]. Under stress regime, SA alters cellular redox state by stimulating ROS production and shifts redox towards oxidative stress.…”

Section: Hormonal Regulationmentioning

confidence: 99%

Looking at Halophytic Adaptation to High Salinity Through Genomics Landscape

Nikalje

Nikam

Suprasanna

2017

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Soil salinity is an important stress factor that limits plant growth and productivity. For a given plant species, it is critical to sense and respond to salt stimuli followed by activation of multitude of mechanisms for plants to survive. Halophytes, the wonders of saline soils, have demonstrated ability to withstand and reproduce in at least 200 mM NaCl concentration, which makes them an ideal system to study mechanism of salt adaptation for imparting salt tolerance in glycophytes. Halophytes and salt sensitive glycophytes adapt different defense strategies towards salinity stress. These responses in halophytes are modulated by a well orchestrated network of signaling pathways, including calcium signaling, reactive oxygen species and phytohormones. Moreover, constitutive expression of salt stress response related genes, which is only salt inducible in glycophytes, maintains salt tolerance traits in halophytes. The focus of this review is on the adaptive considerations of halophytes through the genomics approaches from the point of view of sensing and signaling components involved in mediating plant responses to salinity.

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Interaction between Hormone and Redox Signaling in Plants: Divergent Pathways and Convergent Roles

Cited by 4 publications

References 97 publications

Coping With Metal Toxicity – Cues From Halophytes

Coping With Metal Toxicity – Cues From Halophytes

Optimization of Photosynthetic Productivity in Contrasting Environments by Regulons Controlling Plant Form and Function

Looking at Halophytic Adaptation to High Salinity Through Genomics Landscape

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