Cytosolic alkalinization is a common and early messenger preceding the production of ROS and NO during stomatal closure by variable signals, including abscisic acid, methyl jasmonate and chitosan

Gonugunta, Vijay K.; Srivastava, Nupur; Raghavendra, Agepati S.

doi:10.4161/psb.4.6.8847

Cited by 52 publications

(35 citation statements)

References 33 publications

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“…Although cytosolic alkalization in guard cells has been shown to occur early in ABA-and MJ-induced H 2 O 2 production and stomatal closure [27,61], it is unknown whether cytosolic alkalization is a causal factor for H 2 O 2 production during darkness-induced stomatal closure. To answer this question, the effect of butyric acid on darkness-induced H 2 O 2 production in guard cells was determined.…”

Section: Discussionmentioning

confidence: 99%

“…Effectors that decrease the cytosolic pH (auxin, fusicoccin) open stomata [28], while those that raise the cytosolic pH (ABA and MJ) result in stomatal closure [27,32]. Cytosolic alkalization has been reported to precede the production of reactive oxygen species during ABA-and MJ-induced stomatal closure [27,61]. However, whether S1P affects guard cell cytosolic pH to regulate stomatal movement is unknown.…”

Section: Discussionmentioning

confidence: 99%

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Sphingosine-1-phosphate (S1P) mediates darkness-induced stomatal closure through raising cytosol pH and hydrogen peroxide (H2O2) levels in guard cells in Vicia faba

She

Yang

2012

Sci. China Life Sci.

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The role and signaling of sphingosine-1-phosphate (S1P) during darkness-induced stomatal closure were examined in Vicia faba. Darkness substantially raised S1P and hydrogen peroxide (H 2 O 2 ) levels and closed stomata. These darkness effects were significantly suppressed by DL-threo-dihydrosphingosine (DL-threo-DHS) and N,N-dimethylsphingosine (DMS), two inhibitors of long-chain base kinases. Exogenous S1P led to stomatal closure and H 2 O 2 production, and the effects of S1P were largely prevented by the H 2 O 2 modulators ascorbic acid, catalase, and diphenyleneiodonium. These results indicated that S1P mediated darkness-induced stomatal closure by triggering H 2 O 2 production. In addition, DL-threo-DHS and DMS significantly suppressed both darkness-induced cytosolic alkalization in guard cells and stomatal closure. Exogenous S1P caused cytosolic alkalization and stomatal closure, which could be largely abolished by butyric acid. These results demonstrated that S1P synthesis was necessary for cytosolic alkalization during stomatal closure caused by darkness. Furthermore, together with the data described above, inhibition of darkness-induced H 2 O 2 production by butyric acid revealed that S1P synthesis-induced cytosolic alkalization was a prerequisite for H 2 O 2 production during stomatal closure caused by darkness, a conclusion supported by the facts that the pH increase caused by exogenous S1P had a shorter lag and peaked faster than H 2 O 2 levels and that butyric acid prevented exogenous S1P-induced H 2 O 2 production. Altogether, our data suggested that darkness induced S1P synthesis, causing cytosolic alkalization and subsequent H 2 O 2 production, finally leading to stomatal closure.sphingosine-1-phosphate, cytosol pH, hydrogen peroxide, darkness, stomatal closure Citation:Ma Y L, She X P, Yang S S. Sphingosine-1-phosphate (S1P) mediates darkness-induced stomatal closure through raising cytosol pH and hydrogen peroxide (H 2 O 2 ) levels in guard cells in Vicia faba. Sci China Life Sci, 2012, 55: 974 -983,

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Sphingosine-1-phosphate (S1P) mediates darkness-induced stomatal closure through raising cytosol pH and hydrogen peroxide (H2O2) levels in guard cells in Vicia faba

She

Yang

2012

Sci. China Life Sci.

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“…ABA-induced stomatal closing also partly depends on cytosolic alkalization, which precedes production of both ROS and NO, and appears to promote increased NO levels (Irving et al, 1992;Gonugunta et al, 2009). This process requires function of OST1, one of the SnRK2s acting in the core signaling pathway, and is also both induced by increased [Ca 2+ ] cyt and regulates oscillations in [Ca 2+ ] cyt (Islam et al, 2010).…”

Section: +mentioning

confidence: 99%

Abscisic Acid Synthesis and Response

Finkelstein¹

2013

The Arabidopsis Book

878

744

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Background: Small heat shock proteins (sHSPs) are critical for plant response to biotic and abiotic stresses, especially heat stress. They have also been implicated in various aspects of plant development. However, the acting mechanisms of the sHSPs in plants, especially in perennial grass species, remain largely elusive. Results: In this study, AsHSP26.8a, a novel chloroplast-localized sHSP gene from creeping bentgrass (Agrostis stolonifera L.) was cloned and its role in plant response to environmental stress was studied. AsHSP26.8a encodes a protein of 26.8kDa. Its expression was strongly induced in both leaf and root tissues by heat stress. Transgenic Arabidopsis plants overexpressing AsHSP26.8a displayed reduced tolerance to heat stress. Furthermore, overexpression of AsHSP26.8a resulted in hypersensitivity to hormone ABA and salinity stress. Global gene expression analysis revealed AsHSP26.8a-modulated expression of heat-shock transcription factor gene, and the involvement of AsHSP26.8a in ABAdependent and-independent as well as other stress signaling pathways. Conclusions: Our results suggest that AsHSP26.8a may negatively regulate plant response to various abiotic stresses through modulating ABA and other stress signaling pathways.

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“…Although it is well known that NO interacts with ABA, ET, MeJA to control guard cell signaling in response to various environmental stresses [140,141], only few reports are available with regard to NO, ET, and ABA cross talk in stomatal regulation under UV-B stress [142]. Studies involving Lactuca sativa seedlings showed that exogenous NO supply (using SNP as a NO donor) prevented UV-B induced inhibition of GA and IAA synthesis [143].…”

Section: No-phytohormone Cross Talk Under Other Abiotic Stressesmentioning

confidence: 99%

Cross Talk between Nitric Oxide and Phytohormones Regulate Plant Development during Abiotic Stresses

Nawaz¹,

Shabbir²,

Shahbaz³

et al. 2017

Phytohormones - Signaling Mechanisms and Crosstalk in Plant Development and Stress Responses

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Plants, being sessile, are concurrently exposed to various biotic and abiotic stresses. The perception of stress signals in plants involves a wide spectrum of signal transduction pathways that interact to induce tolerance against adverse environmental conditions. This functional overlapping among various stress signaling cascades also leads to the expression of genes that regulate biosynthesis or action of other hormones. Phytohormonal signals, activated by both developmental and environmental responses, play a crucial role to develop stress tolerance in plants. Nitric oxide (NO) is one of the major players in plant signaling networks. Emerging evidence supports that NO interplays with signaling pathways of auxins, gibberellins, abscisic acid, ethylene, jasmonic acid, brassinosteroids, and other plant hormones to control metabolism, growth, and development in plants. This chapter focuses on the current state of knowledge of cross talk between signaling pathways of NO and phytohormones in plants exposed to various abiotic stresses.

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Cytosolic alkalinization is a common and early messenger preceding the production of ROS and NO during stomatal closure by variable signals, including abscisic acid, methyl jasmonate and chitosan

Cited by 52 publications

References 33 publications

Sphingosine-1-phosphate (S1P) mediates darkness-induced stomatal closure through raising cytosol pH and hydrogen peroxide (H2O2) levels in guard cells in Vicia faba

Sphingosine-1-phosphate (S1P) mediates darkness-induced stomatal closure through raising cytosol pH and hydrogen peroxide (H2O2) levels in guard cells in Vicia faba

Abscisic Acid Synthesis and Response

Cross Talk between Nitric Oxide and Phytohormones Regulate Plant Development during Abiotic Stresses

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