Sugarcane Cell Wall-Associated Defense Responses to Infection by Sporisorium scitamineum

Autor(es)

Marques, Joao P. R. ^{[1, 2]} ; Hoy, Jeffrey W. ^[3] ; Appezzato-da-Gloria, Beatriz ^[4] ; Viveros, Andres F. G. ^[2] ; Vieira, Maria L. C. ^[1] ; Baisakh, Niranjan ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Genet Dept, Luiz de Queiroz Coll Agr, Piracicaba - Brazil

^[2] Louisiana State Univ, Agr Ctr, Sch Plant Environm & Soil Sci, Baton Rouge, LA 70803 - USA

^[3] Louisiana State Univ, Agr Ctr, Dept Plant Pathol & Crop Physiol, Baton Rouge, LA 70803 - USA

^[4] Univ Sao Paulo, Biol Sci Dept, Luiz de Queiroz Coll Agr, Piracicaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN PLANT SCIENCE; v. 9, MAY 23 2018.
• Citações Web of Science: 5

Resumo

The plant cell wall is known to be the first barrier against plant pathogens. Detailed information about sugarcane cell wall-associated defense responses to infection by the causal agent of smut, Sporisorium scitamineum, is scarce. Herein, (immuno)histochemical analysis of two smut resistant and two susceptible sugarcane cultivars was conducted to understand host cell wall structural and compositional modifications in response to fungal infection. Results showed that the fungus grew on the surface and infected the outermost bud scale of both susceptible and resistant cultivars. The present findings also supported the existence of early (24 h after inoculation) and later (72-96 h after inoculation) inducible histopathological responses related to the cell wall modification in resistant cultivars. Lignin and phenolic compounds accumulated during early stages of infection. Later infection response was characterized by the formation of a protective barrier layer with lignin, cellulose and arabinoxylan in the cell walls. Overall, the results suggest possible induction of cell wall-modified responses in smut resistant cultivars to prevent initial entry of the fungus into the meristematic tissues. (AU)

• Processo FAPESP: 12/25315-1 - Histopatologia da interação - Sporisorium scitamineum vs. cana-de-açúcar
• Beneficiário: João Paulo Rodrigues Marques
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado