Abscisic acid and low temperatures suppress the whole plant-specific resistance reaction of rice plants to the infection of Magnaporthe grisea

Koga, Hironori; Dohi, Koji; Mori, Masashi

doi:10.1016/j.pmpp.2004.11.002

Cited by 141 publications

(97 citation statements)

References 13 publications

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“…Association of drought-response genes, the NPK1-related MAPKKK and Os DREB genes, with biotrophic invasion is interesting in the context of the field biology of blast disease. That is, drought stress and cold stress make rice more susceptible to blast (Kawasaki, 2004;Koga et al, 2004a). These results are consistent with a report that the rice MAP kinase Os MAPK5 positively regulates drought, salt, and cold tolerance and negatively regulates PR gene expression and resistance to blast (Xiong and Yang, 2003).…”

Section: Discussion An In-depth View Of the Blast Biotrophic Interactsupporting

confidence: 89%

Interaction Transcriptome Analysis Identifies Magnaporthe oryzae BAS1-4 as Biotrophy-Associated Secreted Proteins in Rice Blast Disease

et al. 2009

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Biotrophic invasive hyphae (IH) of the blast fungus Magnaporthe oryzae secrete effectors to alter host defenses and cellular processes as they successively invade living rice (Oryza sativa) cells. However, few blast effectors have been identified. Indeed, understanding fungal and rice genes contributing to biotrophic invasion has been difficult because so few plant cells have encountered IH at the earliest infection stages. We developed a robust procedure for isolating infected-rice sheath RNAs in which ;20% of the RNA originated from IH in first-invaded cells. We analyzed these IH RNAs relative to control mycelial RNAs using M. oryzae oligoarrays. With a 10-fold differential expression threshold, we identified known effector PWL2 and 58 candidate effectors. Four of these candidates were confirmed to be fungal biotrophy-associated secreted (BAS) proteins. Fluorescently labeled BAS proteins were secreted into rice cells in distinct patterns in compatible, but not in incompatible, interactions. BAS1 and BAS2 proteins preferentially accumulated in biotrophic interfacial complexes along with known avirulence effectors, BAS3 showed additional localization near cell wall crossing points, and BAS4 uniformly outlined growing IH. Analysis of the same infected-tissue RNAs with rice oligoarrays identified putative effector-induced rice susceptibility genes, which are highly enriched for sensor-transduction components rather than typically identified defense response genes.

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Section: Discussion An In-depth View Of the Blast Biotrophic Interactsupporting

confidence: 89%

Interaction Transcriptome Analysis Identifies Magnaporthe oryzae BAS1-4 as Biotrophy-Associated Secreted Proteins in Rice Blast Disease

et al. 2009

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“…This ambivalent ABA response is also reflected in rice-pathogen interactions. For example, while our data uncover ABA as a powerful activator of resistance against C. miyabeanus, Koga et al (2004a) previously reported that exogenous ABA lowers basal resistance against the rice blast pathogen M. oryzae. Likewise, ABA-regulated genes were among the first to be induced in a compatible rice-blast interaction (Ribot et al, 2008).…”

Section: Discussionmentioning

confidence: 55%

Abscisic Acid-Induced Resistance against the Brown Spot Pathogen Cochliobolus miyabeanus in Rice Involves MAP Kinase-Mediated Repression of Ethylene Signaling

et al. 2010

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The plant hormone abscisic acid (ABA) is involved in an array of plant processes, including the regulation of gene expression during adaptive responses to various environmental cues. Apart from its well-established role in abiotic stress adaptation, emerging evidence indicates that ABA is also prominently involved in the regulation and integration of pathogen defense responses. Here, we demonstrate that exogenously administered ABA enhances basal resistance of rice (Oryza sativa) against the brown spot-causing ascomycete Cochliobolus miyabeanus. Microscopic analysis of early infection events in control and ABAtreated plants revealed that this ABA-inducible resistance (ABA-IR) is based on restriction of fungal progression in the mesophyll. We also show that ABA-IR does not rely on boosted expression of salicylic acid-, jasmonic acid -, or callosedependent resistance mechanisms but, instead, requires a functional Ga-protein. In addition, several lines of evidence are presented suggesting that ABA steers its positive effect on brown spot resistance through antagonistic cross talk with the ethylene (ET) response pathway. Exogenous ethephon application enhances susceptibility, whereas genetic disruption of ET signaling renders plants less vulnerable to C. miyabeanus attack, thereby inducing a level of resistance similar to that observed on ABA-treated wild-type plants. Moreover, ABA treatment alleviates C. miyabeanus-induced activation of the ET reporter gene EBP89, while derepression of pathogen-triggered EBP89 transcription via RNA interference-mediated knockdown of OsMPK5, an ABA-primed mitogen-activated protein kinase gene, compromises ABA-IR. Collectively, these data favor a model whereby exogenous ABA enhances resistance against C. miyabeanus at least in part by suppressing pathogen-induced ET action in an OsMPK5-dependent manner.

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“…ABA provides susceptibility to a wide range of pathogens including B. cinerea (Audenaert et al, 2002), F. oxysporum (Anderson et al, 2004), M. grisea (Koga et al, 2004;Yazawa et al, 2012), P. sojae (McDonald and Cahill, 1999), and the bacterial pathogen X. oryzae pv oryzae (J. , while it promotes resistance to pathogens such as the rice-infecting fungal pathogen Cochliobolus miyabeanus (De Vleesschauwer et al, 2010) and the oomycete pathogen Pythium irregular (Adie et al, 2007). ABAmediated resistance or susceptibility is often thought to be a consequence of crosstalk with defense hormones such as JA, SA, or ET (Anderson et al, 2004;De Vleesschauwer et al, 2010;Z.Y.…”

Section: Effector-mediated Manipulation Of the Aba Pathwaymentioning

confidence: 99%

Intervention of Phytohormone Pathways by Pathogen Effectors

2014

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Abscisic acid and low temperatures suppress the whole plant-specific resistance reaction of rice plants to the infection of Magnaporthe grisea

Cited by 141 publications

References 13 publications

Interaction Transcriptome Analysis Identifies Magnaporthe oryzae BAS1-4 as Biotrophy-Associated Secreted Proteins in Rice Blast Disease

Interaction Transcriptome Analysis Identifies Magnaporthe oryzae BAS1-4 as Biotrophy-Associated Secreted Proteins in Rice Blast Disease

Abscisic Acid-Induced Resistance against the Brown Spot Pathogen Cochliobolus miyabeanus in Rice Involves MAP Kinase-Mediated Repression of Ethylene Signaling

Intervention of Phytohormone Pathways by Pathogen Effectors

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