A cotton group C MAP kinase gene, GhMPK2, positively regulates salt and drought tolerance in tobacco

Zhang, Liang; Xi, Dongmei; Li, Shanwei; Gao, Zheng; Zhao, Shuoli; Shi, Jing; Wu, Changai; Guo, Xingqi

doi:10.1007/s11103-011-9788-7

Cited by 124 publications

(72 citation statements)

References 61 publications

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“…The increased solute accumulation of hai1, aip1, and hai3 establish the HAI PP2Cs as one of the few molecular components known to regulate osmotic adjustment. Interestingly, one of the few other genes shown to regulate osmotic adjustment are group C mitogen-activated protein kinases of cotton (Gossypium hirsutum), whose overexpression could increase both Pro and osmoregulatory solute accumulation (Zhang et al, 2011). It is tempting to speculate that these phosphatases and kinases may directly antagonize each other at the molecular level.…”

Section: Unique Stress Physiology Function Of the Hai Pp2csmentioning

confidence: 99%

Unique Drought Resistance Functions of theHighly ABA-InducedClade A Protein Phosphatase 2Cs

Bhaskara

Nguyen²,

Verslues³

2012

Plant Physiology

244

247

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Six Arabidopsis (Arabidopsis thaliana) clade A protein phosphatase 2Cs (PP2Cs) have established abscisic acid (ABA) signaling roles; however, phenotypic roles of the remaining three "HAI" PP2Cs, Highly ABA-Induced1 (HAI1), AKT1-Interacting PP2C1/ HAI2, and HAI3, have remained unclear. HAI PP2C mutants had enhanced proline and osmoregulatory solute accumulation at low water potential, while mutants of other clade A PP2Cs had no or lesser effect on these drought resistance traits. hai1-2 also had increased expression of abiotic stress-associated genes, including dehydrins and late embryogenesis abundant proteins, but decreased expression of several defense-related genes. Conversely, the HAI PP2Cs had relatively less impact on several ABA sensitivity phenotypes. HAI PP2C single mutants were unaffected in ABA sensitivity, while double and triple mutants were moderately hypersensitive in postgermination ABA response but ABA insensitive in germination. The HAI PP2Cs interacted most strongly with PYL5 and PYL7 to -10 of the PYL/RCAR ABA receptor family, with PYL7 to -10 interactions being relatively little affected by ABA in yeast two-hybrid assays. HAI1 had especially limited PYL interaction. Reduced expression of the main HAI1-interacting PYLs at low water potential when HAI1 expression was strongly induced also suggests limited PYL regulation and a role of HAI1 activity in negatively regulating specific drought resistance phenotypes. Overall, the HAI PP2Cs had greatest effect on ABA-independent low water potential phenotypes and lesser effect on classical ABA sensitivity phenotypes. Both this and their distinct PYL interaction demonstrate a new level of functional differentiation among the clade A PP2Cs and a point of cross talk between ABA-dependent and ABA-independent drought-associated signaling.

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Section: Unique Stress Physiology Function Of the Hai Pp2csmentioning

confidence: 99%

Unique Drought Resistance Functions of theHighly ABA-InducedClade A Protein Phosphatase 2Cs

Bhaskara

Nguyen²,

Verslues³

2012

Plant Physiology

244

247

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show abstract

“…This may represent a rapid response of plant cells to salt stress that triggers a transient signaling or juxtamembranal event. The findings that constitutive expression of cotton (Gossypium hirsutum) MPK2 in tobacco (Zhang et al, 2011) and rice MPK5 (Xiong and Yang, 2003) in rice enhanced the drought and salt tolerance of transgenic plants may reflect spatial and temporal alterations in MAPK functions.…”

Section: Sit1 Relays Salt Stress Signals By Activating Mpk3/6mentioning

confidence: 99%

The Receptor-Like Kinase SIT1 Mediates Salt Sensitivity by Activating MAPK3/6 and Regulating Ethylene Homeostasis in Rice

et al. 2014

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High salinity causes growth inhibition and shoot bleaching in plants that do not tolerate high salt (glycophytes), including most crops. The molecules affected directly by salt and linking the extracellular stimulus to intracellular responses remain largely unknown. Here, we demonstrate that rice (Oryza sativa) Salt Intolerance 1 (SIT1), a lectin receptor-like kinase expressed mainly in root epidermal cells, mediates salt sensitivity. NaCl rapidly activates SIT1, and in the presence of salt, as SIT1 kinase activity increased, plant survival decreased. Rice MPK3 and MPK6 function as the downstream effectors of SIT1. SIT1 phosphorylates MPK3 and 6, and their activation by salt requires SIT1. SIT1 mediates ethylene production and salt-induced ethylene signaling. SIT1 promotes accumulation of reactive oxygen species (ROS), leading to growth inhibition and plant death under salt stress, which occurred in an MPK3/6-and ethylene signaling-dependent manner in Arabidopsis thaliana. Our findings demonstrate the existence of a SIT1-MPK3/6 cascade that mediates salt sensitivity by affecting ROS and ethylene homeostasis and signaling. These results provide important information for engineering salt-tolerant crops.

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“…), extensive research is undertaken in many research centers. Recently, Zhang et al (2011) have identified GhMPK2 as a cotton MAP kinase that functions in reducing water loss and adjusting osmotic pressure under drought conditions. Another new cotton MAP kinase, called GhMPK16, belonging to the MAPK group D, was also identified as a drought-responsive gene .…”

Section: Mapks and Droughtmentioning

confidence: 99%

MAPK cascades and major abiotic stresses

et al. 2014

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Plants have evolved with complex signaling circuits that operate under multiple conditions and govern numerous cellular functions. Stress signaling in plant cells is a sophisticated network composed of interacting proteins organized into tiered cascades where the function of a molecule is dependent on the interaction and the activation of another. In a linear scheme, the receptors of cell surface sense the stimuli and convey stress signals through specific pathways and downstream phosphorylation events controlled by mitogen-activated protein (MAP) kinases and second messengers, leading to appropriate adaptive responses. The specificity of the pathway is guided by scaffolding proteins and docking domains inside the interacting partners with distinctive structures and functions. The flexibility and the fine-tuned organization of the signaling molecules drive the activated MAP kinases into the appropriate location and connection to control and integrate the information flow. Here, we overview recent findings of the involvement of MAP kinases in major abiotic stresses (drought, cold and temperature fluctuations) and we shed light on the complexity and the specificity of MAP kinase signaling modules.

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A cotton group C MAP kinase gene, GhMPK2, positively regulates salt and drought tolerance in tobacco

Cited by 124 publications

References 61 publications

Unique Drought Resistance Functions of theHighly ABA-InducedClade A Protein Phosphatase 2Cs

Unique Drought Resistance Functions of theHighly ABA-InducedClade A Protein Phosphatase 2Cs

The Receptor-Like Kinase SIT1 Mediates Salt Sensitivity by Activating MAPK3/6 and Regulating Ethylene Homeostasis in Rice

MAPK cascades and major abiotic stresses

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