Intraspecies variation in sodium partitioning, potassium and proline accumulation under salt stress in Casuarina equisetifolia Forst

Selvakesavan, Rajendran K.; Dhanya, N. N.; Thushara, P.; Abraham, S. M.; Jayaraj, R. S. C.; Balasubramanian, A.; Deeparaj, B.; Sudha, S; Rani, Kirti; Bachpai, V. K. W.; Ganesh, D.; Diagne, Nathalie; Laplaze, Laurent; Gherbi, Hassen; Svistoonoff, Sergio; Hocher, Valérie; Franche, Claudine; Bogusz, Didier; Nambiar-Veetil, Mathish

doi:10.1007/s13199-016-0424-9

Cited by 7 publications

(9 citation statements)

References 39 publications

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“…Previous studies have shown that C. equisetifolia tolerance to high salt concentrations is innate ( Scotti-Campos et al, 2016 ; Selvakesavan et al, 2016 ) and that in vitro salt tolerance of Frankia strains has no correlation with the salt tolerance of C. equisetifolia under salt-stressed conditions ( Ngom et al, 2016 ). Furthermore, nitrogenase activity in nodules is insignificant at 200 mM NaCl ( Duro et al., 2016a ; Duro et al., 2016b ; Mansour et al, 2016 ).…”

Section: Discussionmentioning

confidence: 99%

“…Recently, a few studies have attempted to explain the mechanism of physiological and molecular responses to salt stress in Casaurina. Under salt stress, proline accumulation occurs to adjust the osmotic pressure; however, glycine betaine, other amino acids, and total sugars in C. equisetifolia remain unchanged ( Selvakesavan et al, 2016 ; Tani & Sasakawa, 2010 ). Similarly, C. glauca tolerates high levels of salinity by changing the levels of some neutral sugars, proline, and ornithine ( Jorge et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

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Transcriptome and structure analysis in root of Casuarina equisetifolia under NaCl treatment

Wang

Zhang

Zhenfei

et al. 2021

PeerJ

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Background High soil salinity seriously affects plant growth and development. Excessive salt ions mainly cause damage by inducing osmotic stress, ion toxicity, and oxidation stress. Casuarina equisetifolia is a highly salt-tolerant plant, commonly grown as wind belts in coastal areas with sandy soils. However, little is known about its physiology and the molecular mechanism of its response to salt stress. Results Eight-week-old C. equisetifolia seedlings grown from rooted cuttings were exposed to salt stress for varying durations (0, 1, 6, 24, and 168 h under 200 mM NaCl) and their ion contents, cellular structure, and transcriptomes were analyzed. Potassium concentration decreased slowly between 1 h and 24 h after initiation of salt treatment, while the content of potassium was significantly lower after 168 h of salt treatment. Root epidermal cells were shed and a more compact layer of cells formed as the treatment duration increased. Salt stress led to deformation of cells and damage to mitochondria in the epidermis and endodermis, whereas stele cells suffered less damage. Transcriptome analysis identified 10,378 differentially expressed genes (DEGs), with more genes showing differential expression after 24 h and 168 h of exposure than after shorter durations of exposure to salinity. Signal transduction and ion transport genes such as HKT and CHX were enriched among DEGs in the early stages (1 h or 6 h) of salt stress, while expression of genes involved in programmed cell death was significantly upregulated at 168 h, corresponding to changes in ion contents and cell structure of roots. Oxidative stress and detoxification genes were also expressed differentially and were enriched among DEGs at different stages. Conclusions These results not only elucidate the mechanism and the molecular pathway governing salt tolerance, but also serve as a basis for identifying gene function related to salt stress in C. equisetifolia.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transcriptome and structure analysis in root of Casuarina equisetifolia under NaCl treatment

Wang

Zhang

Zhenfei

et al. 2021

PeerJ

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“…Moderate to high survival rates were also observed in saline soils from Australia (Carter et al 2006a) and Tunisia (Souguir et al 2019) for C. obesa (seed lots from Austin Bay Nature Reserve) and C. glauca (seed lots from the Regional Commission for Agricultural Development of Ariana), respectively. Indeed, several studies performed under controlled experimental conditions, revealed that several ecotypes of these Casuarina species, including Australian seed lots from CSIRO, and Indian clones from the germplasm collection of the Institute of Forest Genetics and Tree Breeding, may tolerate nearly seawater levels of salt (Van der Moezel et al 1989;Carter et al 2006aCarter et al , 2006bIsla et al 2014;Batista-Santos et al 2015;Selvakesavan et al 2016;Djighaly et al 2018;Diagne et al 2020). However, while C. glauca was able to sustain growth and biomass in sodic soils, C. obesa was negatively impacted by the same type of soils (Goel and Behl 2005).…”

Section: Resilience Of Casuarina To Saline Environmentsmentioning

confidence: 99%

Mechanisms of salt stress tolerance in Casuarina: a review of recent research

Ribeiro‐Barros

Pawlowski

Ramalho

2022

Journal of Forest Research

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Salinization is a global concern whose extent is predicted to progressively increase over this century. In this context, biosaline agriculture has been included in the set of climate-smart solutions to support sustainable and resilient ecosystems. The Casuarinaceae family is widely known for its intrinsic ability to thrive under saline environments. Therefore, understanding the mechanisms underlying salt-tolerance in this family is of utmost importance for landscape integration and soil rehabilitation. In this mini-review, we present the state of the art of Casuarina research -from gene to ecosystem -in response to salinity, towards green growth and sustainable development. Based on literature retrieval from 2000 to 2021, a general overview of salt-stress tolerance in the Casuarinaceae is presented, and the extent of the contribution of root-nodule and arbuscular mycorrhizal symbioses, as well as the related eco-physiological and molecular changes are discussed.

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“…Soils, especially poor soils, have low osmotic potential while plant tissues have a much higher osmotic potential. Most studies on the effect of salinity on actinorhizal symbionts have focused on the plant, especially Casuarina to illustrate various adaptations such as sodium partitioning or proline accumulation 11 . Only a few recent studies on Frankia have shown the effects of salinity on ammonium (NH 4 + ) assimilation 12 , on cell wall/membrane biogenesis functions and on some transport proteins 13 .…”

Section: Introductionmentioning

confidence: 99%

The PEG-responding desiccome of the alder microsymbiont Frankia alni

Ghedira

Harigua‐Souiai

Hamda

et al. 2018

Sci Rep

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Actinorhizal plants are ecologically and economically important. Symbiosis with nitrogen-fixing bacteria allows these woody dicotyledonous plants to colonise soils under nitrogen deficiency, water-stress or other extreme conditions. However, proteins involved in xerotolerance of symbiotic microorganisms have yet to be identified. Here we characterise the polyethylene glycol (PEG)-responding desiccome from the most geographically widespread Gram-positive nitrogen-fixing plant symbiont, Frankia alni, by next-generation proteomics, taking advantage of a Q-Exactive HF tandem mass spectrometer equipped with an ultra-high-field Orbitrap analyser. A total of 2,052 proteins were detected and quantified. Under osmotic stress, PEG-grown F. alni cells increased the abundance of envelope-associated proteins like ABC transporters, mechano-sensitive ion channels and Clustered Regularly Interspaced Short Palindromic Repeats CRISPR-associated (cas) components. Conjointly, dispensable pathways, like nitrogen fixation, aerobic respiration and homologous recombination, were markedly down-regulated. Molecular modelling and docking simulations suggested that the PEG is acting on Frankia partly by filling the inner part of an up-regulated osmotic-stress large conductance mechanosensitive channel.

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Intraspecies variation in sodium partitioning, potassium and proline accumulation under salt stress in Casuarina equisetifolia Forst

Cited by 7 publications

References 39 publications

Transcriptome and structure analysis in root of Casuarina equisetifolia under NaCl treatment

Transcriptome and structure analysis in root of Casuarina equisetifolia under NaCl treatment

Mechanisms of salt stress tolerance in Casuarina: a review of recent research

The PEG-responding desiccome of the alder microsymbiont Frankia alni

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