PMID- 24491116 OWN - NLM STAT- MEDLINE DCOM- 20140929 LR - 20240325 IS - 1469-8137 (Electronic) IS - 0028-646X (Print) IS - 0028-646X (Linking) VI - 201 IP - 4 DP - 2014 Mar TI - RuBPCase activase (RCA) mediates growth-defense trade-offs: silencing RCA redirects jasmonic acid (JA) flux from JA-isoleucine to methyl jasmonate (MeJA) to attenuate induced defense responses in Nicotiana attenuata. PG - 1385-1395 LID - 10.1111/nph.12591 [doi] AB - * RuBPCase activase (RCA), an abundant photosynthetic protein, is strongly down-regulated in response to Manduca sexta's oral secretion (OS) in Nicotiana attenuata. RCA-silenced plants are impaired not only in photosynthetic capacity and growth, but also in jasmonic acid-isoleucine (JA-Ile) signaling, and herbivore resistance mediated by JA-Ile-dependent defense traits. These responses are consistent with a resource-based growth-defense trade-off. * As JA + Ile supplementation of OS restored wild-type (WT) levels of JA-Ile, defenses and resistance to M. sexta, but OS supplemented individually with JA or Ile did not, the JA-Ile deficiency of RCA-silenced plants could not be attributed to lower JA or Ile pools or JAR4/6 conjugating activity. Similar levels of JA-Ile derivatives after OS elicitation indicated unaltered JA-Ile turnover, and lower levels of other JA conjugates ruled out competition from other conjugation reactions. * RCA-silenced plants accumulated more methyl jasmonate (MeJA) after OS elicitation, which corresponded to increased jasmonate methyltransferase (JMT) activity. RCA silencing phenocopies JMT overexpression, wherein elevated JMT activity redirects OS-elicited JA flux towards inactive MeJA, creating a JA sink which depletes JA-Ile and its associated defense responses. * Hence, RCA plays an additional non-photosynthetic role in attenuating JA-mediated defenses and their associated costs, potentially allowing plants to anticipate resource-based constraints on growth before they actually occur. CI - (c) 2013 Max Planck Society. New Phytologist (c) 2013 New Phytologist Trust. FAU - Mitra, Sirsha AU - Mitra S AD - Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knoll-Strasse 8, 07745, Jena, Germany. FAU - Baldwin, Ian T AU - Baldwin IT AD - Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knoll-Strasse 8, 07745, Jena, Germany. LA - eng GR - 293926/ERC_/European Research Council/International PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131111 PL - England TA - New Phytol JT - The New phytologist JID - 9882884 RN - 0 (Acetates) RN - 0 (Cyclopentanes) RN - 0 (Oxylipins) RN - 0 (Plant Proteins) RN - 0 (rca protein, plant) RN - 04Y7590D77 (Isoleucine) RN - 6RI5N05OWW (jasmonic acid) RN - 900N171A0F (methyl jasmonate) RN - EC 2.1.1.- (Methyltransferases) SB - IM MH - Acetates/*metabolism MH - Animals MH - Cyclopentanes/*metabolism/pharmacology MH - *Gene Silencing/drug effects MH - Herbivory/drug effects MH - Isoleucine/*metabolism MH - Manduca/drug effects/physiology MH - Methylation MH - Methyltransferases/metabolism MH - Oxylipins/*metabolism/pharmacology MH - Plant Proteins/*metabolism MH - Signal Transduction/drug effects MH - Nicotiana/drug effects/enzymology/*growth & development/*immunology PMC - PMC4996320 MID - EMS57841 OID - NLM: EMS57841 OTO - NOTNLM OT - Manduca sexta OT - Nicotiana attenuata OT - RuBPCase activase OT - herbivory OT - jasmonate methyl transferase OT - jasmonate signaling OT - methyl jasmonate OT - plant defense EDAT- 2014/02/05 06:00 MHDA- 2014/09/30 06:00 PMCR- 2016/08/24 CRDT- 2014/02/05 06:00 PHST- 2013/09/06 00:00 [received] PHST- 2013/10/03 00:00 [accepted] PHST- 2014/02/05 06:00 [entrez] PHST- 2014/02/05 06:00 [pubmed] PHST- 2014/09/30 06:00 [medline] PHST- 2016/08/24 00:00 [pmc-release] AID - 10.1111/nph.12591 [doi] PST - ppublish SO - New Phytol. 2014 Mar;201(4):1385-1395. doi: 10.1111/nph.12591. Epub 2013 Nov 11.