<i><scp>TaMDAR6</scp></i> acts as a negative regulator of plant cell death and participates indirectly in stomatal regulation during the wheat stripe rust–fungus interaction

Abou-Attia, M. A.; Wang, Xiaojie; Al-Attala, Mohamed N.; Xu, Qiang; Zhan, Gangming; Kang, Zhensheng

doi:10.1111/ppl.12355

Cited by 16 publications

(8 citation statements)

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“…Its mutation results in reducing the hyphae growth of the biotrophic pathogen Puccinia striiformis, thus inhibiting its sporulation and enhancing necrosis at the infection site. Further studies in the same interaction evidenced two other S genes, TaMDAR6 and TaSTP13 (Abou-Attia et al, 2016;Huai et al, 2020), emphasizing the existence of several S genes in the wheat genome and suggesting that some of them might be implicated in wheat susceptibilityrelated mechanisms to FHB. If most studies have focused on the genetic determinants of wheat resistance to FHB so far, an interesting alternative is to consider the molecular and the physiological processes that make the host plant susceptible to F. graminearum.…”

Section: Fhb Infection Process: Is Susceptibility Behind the Mirror?mentioning

confidence: 78%

Searching for FHB Resistances in Bread Wheat: Susceptibility at the Crossroad

et al. 2020

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Fusarium head blight (FHB), primarily caused by Fusarium graminearum, is one of the most devastating fungal wheat diseases. During the past decades, many efforts have been deployed to dissect FHB resistance, investigating both the wheat responses to infection and, more recently, the fungal determinants of pathogenicity. Although no total resistance has been identified so far, they demonstrated that some plant functions and the expression of specific genes are needed to promote FHB. Associated with the increasing list of F. graminearum effectors able to divert plant molecular processes, this fact strongly argues for a functional link between susceptibility-related factors and the fate of this disease in wheat. In this review, we gather more recent data concerning the involvement of plant and fungal genes and the functions and mechanisms in the development of FHB susceptibility, and we discuss the possibility to use them to diversify the current sources of FHB resistance.

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Section: Fhb Infection Process: Is Susceptibility Behind the Mirror?mentioning

confidence: 78%

Searching for FHB Resistances in Bread Wheat: Susceptibility at the Crossroad

et al. 2020

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“…Plants have been reported to respond to pathogen infection with a burst of ROS. Under biotic stress, ROS act as signalling molecules to activate pathogenesis-related proteins and systemic acquired resistance in cells adjacent to the infection site to prevent further pathogen spread [ 37 , 38 ]. Low levels of ROS serve as signalling molecules that play important roles in plant immunity.…”

Section: Discussionmentioning

confidence: 99%

GhMAP3K65, a Cotton Raf-Like MAP3K Gene, Enhances Susceptibility to Pathogen Infection and Heat Stress by Negatively Modulating Growth and Development in Transgenic Nicotiana benthamiana

Zhai

Jia

Liu

et al. 2017

IJMS

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Mitogen-activated protein kinase kinase kinases (MAP3Ks), the top components of MAPK cascades, modulate many biological processes, such as growth, development and various environmental stresses. Nevertheless, the roles of MAP3Ks remain poorly understood in cotton. In this study, GhMAP3K65 was identified in cotton, and its transcription was inducible by pathogen infection, heat stress, and multiple signalling molecules. Silencing of GhMAP3K65 enhanced resistance to pathogen infection and heat stress in cotton. In contrast, overexpression of GhMAP3K65 enhanced susceptibility to pathogen infection and heat stress in transgenic Nicotiana benthamiana. The expression of defence-associated genes was activated in transgenic N. benthamiana plants after pathogen infection and heat stress, indicating that GhMAP3K65 positively regulates plant defence responses. Nevertheless, transgenic N. benthamiana plants impaired lignin biosynthesis and stomatal immunity in their leaves and repressed vitality of their root systems. In addition, the expression of lignin biosynthesis genes and lignin content were inhibited after pathogen infection and heat stress. Collectively, these results demonstrate that GhMAP3K65 enhances susceptibility to pathogen infection and heat stress by negatively modulating growth and development in transgenic N. benthamiana plants.

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“…Knockdown of TaMDHAR4 and TaMDAR6 through virus-induced gene silencing (VIGS) enhanced the wheat resistance to Puccinia striiformis f. sp. tritici ( Pst ) (Feng et al, 2014 ; Abou-Attia et al, 2016 ). However, the roles of rice MDAR in heat stress response remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Suppression of OsMDHAR4 enhances heat tolerance by mediating H2O2-induced stomatal closure in rice plants

Liu

Sun

et al. 2018

Rice

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BackgroundMonodehydroascorbate reductase (MDAR or MDHAR), which is responsible for growth, development and stress response in plants, is a key enzyme in the maintenance of the ascorbate acid (AsA) pool through the AsA–glutathione (AsA–GSH) cycle. High temperature affects a broad spectrum of cellular components and metabolism including AsA–GSH cycle in plants. In rice, however, the detailed roles of OsMDHAR4 in resistance against heat stress remains unclear.ResultsHere, we report that OsMDHAR4 protein was localized to the chloroplasts. OsMDHAR4 expression was detected in all tissues surveyed and peaked in leaf blade. OsMDHAR4 was responsive to multiple stresses and was relatively strongly induced by heat treatment. In comparison with wild type, the osmdhar4 mutant exhibited improved tolerance to heat stress, whereas OsMDHAR4 overexpression lines exhibited enhanced sensitivity to heat stress. Moreover, we found that suppression of OsMDHAR4 promoted stomatal closure and hydrogen peroxide accumulation, and overexpression of OsMDHAR4 increased stomatal opening and decreased hydrogen peroxide content in rice leaves.ConclusionsTaken together, these results indicated that OsMDHAR4 negatively regulates tolerance to heat stress by mediating H2O2-induced stomatal closure in rice.Electronic supplementary materialThe online version of this article (10.1186/s12284-018-0230-5) contains supplementary material, which is available to authorized users.

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TaMDAR6 acts as a negative regulator of plant cell death and participates indirectly in stomatal regulation during the wheat stripe rust–fungus interaction

Cited by 16 publications

References 50 publications

Searching for FHB Resistances in Bread Wheat: Susceptibility at the Crossroad

Searching for FHB Resistances in Bread Wheat: Susceptibility at the Crossroad

GhMAP3K65, a Cotton Raf-Like MAP3K Gene, Enhances Susceptibility to Pathogen Infection and Heat Stress by Negatively Modulating Growth and Development in Transgenic Nicotiana benthamiana

Suppression of OsMDHAR4 enhances heat tolerance by mediating H2O2-induced stomatal closure in rice plants

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