Osmogenetics: Aristotle to <i>Arabidopsis</i>

Maggio, Aurelio; Zhu, Jian‐Kang; Hasegawa, Paul M.; Bressan, Ray A.

doi:10.1105/tpc.105.040501

Cited by 78 publications

(59 citation statements)

References 118 publications

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“…The tonoplast Na + /H + exchange attributed to NHX proteins in Arabidopsis was, when compared with the wild type, significantly higher, greatly reduced and unchanged in the sos1, sos2 and sos3 mutants, respectively (Qiu et al, 2004 (Maathuis and Amtmann, 1999;Shabala et al, 2006). Consequently, the enhanced capacity of K + uptake and subsequent retention is a critical adaptation to salinity stress (Maathuis and Amtmann, 1999;Borsani et al, 2001;Maggio et al, 2006). A negative correlation between Na + -triggered K + loss and salt tolerance has been described previously Shabala et al, 2006).…”

Section: Discussionmentioning

confidence: 94%

“…Recently, the K + / H + exchange activity of the ItNHX1 protein has been implicated in the increase of the vacuolar pH, K + accumulation, cell expansion and color transition from red to blue in petals of Ipomoea tricolor (Yoshida et al, 2009). Also, Arabidopsis nhx1 mutant plants had reduced leaf area and smaller epidermal cells (Apse et al, 2003), suggesting that these mutant plants do not supply the vacuoles with sufficient osmotic potential for the normal expansion of leaf cells, which largely depends on K + accumulation (Maggio et al, 2006). Under salt stress, K + concentrations in different parts of tomato plants decreased, whereas the Na + concentration increased in both transgenic and control lines, following well-known patterns of salt-related mineral changes in tomato (Rush and Epstein, 1981;Olias et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

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The AtNHX1 exchanger mediates potassium compartmentation in vacuoles of transgenic tomato

et al. 2010

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

The AtNHX1 exchanger mediates potassium compartmentation in vacuoles of transgenic tomato

et al. 2010

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“…Consistent with the H 2 O 2 burst occurring in serf1 roots upon salt stress, genes related to Na + exclusion and compartmentalization, which are responsive to both H 2 O 2 and ABA, were only weakly affected by altered expression of SERF1 during salt stress. As ABA is required for long-term adaptation to salt stress (Maggio et al, 2006), the regulation of these genes by ABA might partially compensate for the lack of the H 2 O 2 -dependent signaling in serf1 roots and thereby explain the relatively mild effect of loss or knockdown of SERF1 on long-term salt stress tolerance.…”

Section: Discussionmentioning

confidence: 99%

SALT-RESPONSIVE ERF1 Regulates Reactive Oxygen Species-Dependent Signaling during the Initial Response to Salt Stress in Rice

et al. 2013

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Early detection of salt stress is vital for plant survival and growth. Still, the molecular processes controlling early salt stress perception and signaling are not fully understood. Here, we identified SALT-RESPONSIVE ERF1 (SERF1), a rice (Oryza sativa) transcription factor (TF) gene that shows a root-specific induction upon salt and hydrogen peroxide (H 2 O 2 ) treatment. Loss of SERF1 impairs the salt-inducible expression of genes encoding members of a mitogen-activated protein kinase (MAPK) cascade and salt tolerance-mediating TFs. Furthermore, we show that SERF1-dependent genes are H 2 O 2 responsive and demonstrate that SERF1 binds to the promoters of MAPK KINASE KINASE6 (MAP3K6), MAPK5, DEHYDRATION-RESPONSIVE ELEMENT BINDING2A (DREB2A), and ZINC FINGER PROTEIN179 (ZFP179) in vitro and in vivo. SERF1 also directly induces its own gene expression. In addition, SERF1 is a phosphorylation target of MAPK5, resulting in enhanced transcriptional activity of SERF1 toward its direct target genes. In agreement, plants deficient for SERF1 are more sensitive to salt stress compared with the wild type, while constitutive overexpression of SERF1 improves salinity tolerance. We propose that SERF1 amplifies the reactive oxygen species-activated MAPK cascade signal during the initial phase of salt stress and translates the salt-induced signal into an appropriate expressional response resulting in salt tolerance.

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“…It has most devastating effects on plant productivity and growth than any other environmental stresses (Lambers et al, 2008). Alterations in physiology, growth and development, in response to stress, change the life history of plants (Maggio et al, 2006;Rassaa et al, 2008). Drought severity is expected to be increased in the upcoming years because of changing climate scenarios (Walter et al, 2011;Handmer et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Biological feedbacks of different plant species under water stress conditions have been studied at both organizational and molecular level (Hausman et al, 2005;Maggio et al, 2006). Marigold (T. erecta L.) is an important floriculture crop belonging to family Asteraceae (Kishimoto et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Screening of marigold (Tagetes erecta L.) cultivars for drought stress based on vegetative and physiological characteristics

Younis

Riaz

Qasim

et al. 2018

IJFAAS

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Drought tolerance is an important genotypic character to be exploited for the plant cultivar selection under water deficit conditions. In the recent study, we examined the response of two marigold cultivars (Inca and Bonanza) under different regimes of drought stress. The aim was to determine the best performing cultivar under water/drought stress. Three irrigation treatments include; 4 days (T 1 ), 6 days (T 2 ) and 8 days (T 3 ) in comparison to control 1 day (T 0 ) interval were imposed. Response characters under study were morphological, physiological and anatomical. Complete Randomized Design (CRD) with four replications in two factorial arrangements was followed for experiment layout. The results revealed that increasing water stress adversely affect plant height, in both cultivars. Both cultivars showed a decreasing trend to the number of flowers under water stress. Total chlorophyll contents including a, b were also showed reduction under prolonged drought treatment in both cultivars from (2.7 mg g -1 FW) to (1 mg g -1 FW). Overall, the performance of cultivar (cv.) Inca was satisfactory under water stress regimes. These results are helpful for selecting drought tolerant marigold cultivars in water scarce areas.

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Osmogenetics: Aristotle to Arabidopsis

Cited by 78 publications

References 118 publications

The AtNHX1 exchanger mediates potassium compartmentation in vacuoles of transgenic tomato

The AtNHX1 exchanger mediates potassium compartmentation in vacuoles of transgenic tomato

SALT-RESPONSIVE ERF1 Regulates Reactive Oxygen Species-Dependent Signaling during the Initial Response to Salt Stress in Rice

Screening of marigold (Tagetes erecta L.) cultivars for drought stress based on vegetative and physiological characteristics

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