title: New perspectives into jasmonate roles in maize.
abstract: It is well-known from the model dicotyledonous plants, Arabidopsis and tomato, that jasmonates (JAs) act as defense hormones in planta due to their potent ability to mediate defensive responses against insect/pathogen attacks or harsh environmental conditions. JA is also required for various developmental processes such as male fertility, seed maturation, root extension, and leaf senescence. In our recently published Plant Cell paper, the multiple roles of JA in the monocotyledonous agro-economically important model plant, maize, were investigated by comprehensive analysis of JA-deficient double mutant disrupted in the two oxophytodienoate reductase genes, OPR7 and OPR8. These two genes are the closest orthologs of the Arabidopsis JA-producing OPR3 and are the only maize OPRs required for JA biosynthesis. With this mutant, we previously showed that JA is essential for both male and female reproductive development, and required for the regulation of brace root pigmentation, leaf senescence, and defense against oomycete Pythium aristosporum, and beet armyworm (Spodoptera exigua). In this addendum, we expanded the investigation into the function of JA in elongation of sheaths, leaves, and roots, and its involvement in photomorphogenesis of seedlings.
authors.affiliation: a Department of Plant Pathology and Microbiology ; Texas A&M University ; College Station , TX USA.
authors.forename: Yuanxin
authors.initials: Y
authors.lastname: Yan
authors.forename: Pei-Cheng
authors.initials: PC
authors.lastname: Huang
authors.forename: Eli
authors.initials: E
authors.lastname: Borrego
authors.forename: Michael
authors.initials: M
authors.lastname: Kolomiets
mesh_terms: D003517:Cyclopentanes / Q000378:metabolism* / Q000494:pharmacology; D008027:Light; D009024:Morphogenesis / Q000187:drug effects / Q000528:radiation effects; D009154:Mutation / Q000235:genetics; D009929:Organ Size / Q000187:drug effects / Q000528:radiation effects; D054883:Oxylipins / Q000378:metabolism* / Q000494:pharmacology; D010641:Phenotype; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development / Q000528:radiation effects; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000528:radiation effects; D036226:Seedlings / Q000033:anatomy & histology / Q000187:drug effects / Q000528:radiation effects; D003313:Zea mays / Q000187:drug effects / Q000378:metabolism* / Q000528:radiation effects
chemical_list: D003517:Cyclopentanes; D054883:Oxylipins; C011006:jasmonic acid
keywords: JAs, jasmonates; MeJA, methyl jasmonate; OPDA, 12-oxo-phytodienoic acid; OPR, 12-oxo-phytodienoate reductase; Pythium; jasmonate biosynthesis; maize; tasselseeds