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  Inferring roles in defense from metabolic allocation of rice diterpenoids

Lu, X., Zhang, J., Brown, B., Li, R., Rodríguez-Romero, J., Berasategui, A., et al. (2018). Inferring roles in defense from metabolic allocation of rice diterpenoids. The Plant Cell, 30, 1119-1131. doi:10.1105/tpc.18.00205.

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http://dx.doi.org/10.1105/tpc.18.00205 (Publisher version)
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 Creators:
Lu, Xuan, Author
Zhang, Juan, Author
Brown, Benjamin, Author
Li, Riqing, Author
Rodríguez-Romero, Julio, Author
Berasategui, Aileen1, 2, Author           
Liu, Bo, Author
Xu, Meimei, Author
Luo, Dangping, Author
Pan, Zhiqiang, Author
Baerson, Scott, Author
Gershenzon, Jonathan1, Author           
Li, Zhaohu, Author
Sesma, Ane, Author
Yang, Bing, Author
Peters, Reuben J., Author
Affiliations:
1Department of Biochemistry, Prof. J. Gershenzon, MPI for Chemical Ecology, Max Planck Society, ou_421893              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              

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 Abstract: Among their responses to microbial infection, plants deploy an arsenal of natural antibiotic products. These historically have been identified on the basis of their antibiotic activity in vitro, which leaves open the question of their relevance to defense in planta. The vast majority of such natural products from the important crop plant rice (Oryza sativa) are diterpenoids whose biosynthesis proceeds via either ent- or syn- copalyl diphosphate (CPP) intermediates, and which were isolated on the basis of their antibiotic activity against the fungal blast pathogen Magnaporthe oryzae. However, rice plants in which the gene for the syn-CPP synthase Os-CPS4 is knocked-out do not exhibit increased susceptibility to M. oryzae. Here we show that knocking-out or knocking-down Os-CPS4 actually decreases susceptibility to the bacterial leaf blight pathogen Xanthomonas oryzae. By contrast, genetic manipulation of the gene for the ent-CPP synthase Os-CPS2 alters susceptibility to both M. oryzae and X. oryzae. Despite the secretion of diterpenoids dependent on Os-CPS2 or Os-CPS4 from roots, neither knock-out exhibited significant changes in the composition of their rhizosphere bacterial communities. Nevertheless, rice plants allocate substantial metabolic resources towards syn- and ent-CPP derived diterpenoids upon infection/induction. Further investigation revealed that Os-CPS4 plays a role in fungal non-host disease resistance. Thus, examination of metabolic allocation provides important clues into physiological function.

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 Dates: 20182018-04
 Publication Status: Published online
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 Identifiers: Other: GER509
DOI: 10.1105/tpc.18.00205
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Title: The Plant Cell
  Abbreviation : Plant C
Source Genre: Journal
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Publ. Info: Rockville : American Society of Plant Physiologists
Pages: - Volume / Issue: 30 Sequence Number: - Start / End Page: 1119 - 1131 Identifier: ISSN: 1532-298X
CoNE: https://pure.mpg.de/cone/journals/resource/1532-298X