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The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.

A fungal-responsive MAPK cascade regulates phytoalexin biosynthesis in Arabidopsis

Open access
Ren, Dongtao, Liu, Yidong, Yang, Kwang-Yeol, Han, Ling, Mao, Guohong, Glazebrook, Jane, Zhang, Shuqun·2008·Proceedings of the National Academy of Sciences

Abstract

Plant recognition of pathogens leads to rapid activation of MPK3 and MPK6, two Arabidopsis mitogen-activated protein kinases (MAPKs), and their orthologs in other species. Here, we report that synthesis of camalexin, the major phytoalexin in Arabidopsis , is regulated by the MPK3/MPK6 cascade. Activation of MPK3/MPK6 by expression of active upstream MAPK kinase (MAPKK) or MAPKK kinase (MAPKKK) was sufficient to induce camalexin synthesis in the absence of pathogen attack. Induction of camalexin by Botrytis cinerea was preceded by MPK3/MPK6 activation, and compromised in mpk3 and mpk6 mutants. Genetic analysis placed the MPK3/MPK6 cascade upstream of PHYTOALEXIN DEFICIENT 2 (PAD2) and PAD3, but independent or downstream of PAD1 and PAD4. Camalexin induction after MPK3/MPK6 activation was preceded by rapid and coordinated up-regulation of multiple genes encoding enzymes in the tryptophan (Trp) biosynthetic pathway, in the conversion of Trp to indole-3-acetaldoxime (IAOx, a branch point between primary and secondary metabolism), and in the camalexin biosynthetic pathway downstream of IAOx. These results indicate that the MPK3/MPK6 cascade regulates camalexin synthesis through transcriptional regulation of the biosynthetic genes after pathogen infection.

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Metadata

Authors
Ren, D., Liu, Y., Yang, K.-Y., Han, L., Mao, G., Glazebrook, J., & Zhang, S.
Venue
Proceedings of the National Academy of Sciences
Published
2008-04-08
Volume
105
Issue
14
Pages
5638-5643
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2077328940
Cited by
354
References
38
FWCI
25.45
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: A fungal-responsive MAPK cascade regulates phytoalexin biosynthesis in Arabidopsis. https://app.cochat.ai/papers/10.1073/pnas.0711301105
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Ren, D., Liu, Y., Yang, K.-Y., Han, L., Mao, G., Glazebrook, J., & Zhang, S. (2008). A fungal-responsive MAPK cascade regulates phytoalexin biosynthesis in Arabidopsis. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0711301105

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