title: Effect of mutations in the pea genes Sym33 and Sym40. II. Dynamics of arbuscule development and turnover.
abstract: Two symbiotic pea (Pisum sativum L.) mutants SGEFix(-)-1 (sym40) and SGEFix(-)-2 (sym33) with abnormalities in infection thread formation in symbiotic root nodules were characterised with respect to dynamics of arbuscule development at 15 degrees C and 24 degrees C. Mutation of sym33 decreased mycorrhiza colonisation at both temperatures and delayed arbuscule development at 15 degrees C, whereas mutation of sym40 accelerated mycorrhiza colonisation and arbuscule senescence at 24 degrees C. The differences between the mutants and the wild-type were more pronounced at 24 degrees C, a temperature close to the optimum for pea growth. The results demonstrate that both pea genes are important in the control of arbuscular mycorrhiza development and can be considered necessary for the tripartite symbiosis in pea.
authors.affiliation: All-Russia Research Institute for Agricultural Microbiology, Podbelsky chaussee 3, St.-Petersburg, Pushkin 8, 196608, Russia.
authors.forename: Lidia M
authors.initials: LM
authors.lastname: Jacobi
authors.forename: Lidia A
authors.initials: LA
authors.lastname: Zubkova
authors.forename: Ekaterina M
authors.initials: EM
authors.lastname: Barmicheva
authors.forename: Viktor E
authors.initials: VE
authors.lastname: Tsyganov
authors.forename: Alexey Y
authors.initials: AY
authors.lastname: Borisov
authors.forename: Igor A
authors.initials: IA
authors.lastname: Tikhonovich
mesh_terms: D017343:Genes, Plant / Q000235:genetics* / Q000502:physiology; D009154:Mutation; D038821:Mycorrhizae / Q000254:growth & development*; D018532:Pisum sativum / Q000235:genetics* / Q000254:growth & development / Q000382:microbiology; D018517:Plant Roots / Q000235:genetics / Q000254:growth & development / Q000382:microbiology; D013559:Symbiosis / Q000235:genetics