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Vascular traits of stem galls: Cell increment versus morphogenetic constraints in wood anatomy.
Jorge, N D C; Freitas, M D S C; Caffaro, R M; Vale, F H A; Lemos-Filho, J P; Isaias, R M D S.
Afiliación
  • Jorge NDC; Laboratório de Anatomia Vegetal, Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
  • Freitas MDSC; Laboratório de Anatomia Vegetal, Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
  • Caffaro RM; Laboratório de Anatomia Vegetal, Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
  • Vale FHA; Laboratório de Anatomia Vegetal, Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
  • Lemos-Filho JP; Laboratório de Fisiologia Vegetal, Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
  • Isaias RMDS; Laboratório de Anatomia Vegetal, Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Plant Biol (Stuttg) ; 24(3): 450-457, 2022 Apr.
Article en En | MEDLINE | ID: mdl-35098632
Eremanthus erythropappus hosts globoid stem galls induced by Neolasioptera sp. (Diptera: Cecidomyiidae) close to the stem apex, which do not compromise the shoot apical meristem (SAM). We hypothesize that maintenance of the SAM, as well as the increasing number of leaves per branch and of galled stem lengths and diameters, are a consequence of alterations in vascular cells and, consequently, in the priority for water flow from non-galled stems to the stem galls. Our study focuses on the globoid stem galls to evaluate if gall induction and development promote changes in structure and function of secondary xylem cells. Anatomical, cytological, histometric and physiological methods were used to analyse non-galled stem branches (NGS), mature globoid stem galls and stem portions below and above the galls. These analyses revealed that vessel elements are larger in stem galls and in stem portions above the galls. Under Neolasioptera sp. induction activity, the vascular cambium of E. erythropappus produces less numerous but larger vessel elements and overproduces parenchyma cells. Contrary to the vascular constriction hypothesis proposed for bacterial galls, the vascular traits of the Neolasioptera sp. stem galls on E. erythropappus result in priority for water flow to galls and the non-galled portions above the galls, allowing the maintenance of galled stem growth and development.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Asteraceae / Dípteros Límite: Animals Idioma: En Revista: Plant Biol (Stuttg) Asunto de la revista: BOTANICA Año: 2022 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Asteraceae / Dípteros Límite: Animals Idioma: En Revista: Plant Biol (Stuttg) Asunto de la revista: BOTANICA Año: 2022 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido