Artigo
Accumulation of a complex of pigments in sorghum mesocotyls in response to wounding
Registro en:
Journal Of Phytopathology-phytopathologische Zeitschrift. Berlin: Blackwell Wissenschafts-verlag Gmbh, v. 135, n. 1, p. 63-70, 1992.
0931-1785
10.1111/j.1439-0434.1992.tb01251.x
WOS:A1992HW96100008
Autor
Lopez, AMQ
Pascholati, S. F.
Resumen
Sorghum mesocotyls upon mechanical injury with an abrasive (carborundum) or inoculation with the fungi Helminthosporium carbonum (non-pathogen) or Colletotrichum graminicola (pathogen) accumulate a methanol-soluble pigment complex with an absorption maximum around 480-490 nm. Spectral and thin-layer chromatographic analyses showed that the complexes which accumulated either in response to wounding or inoculation are similar. Thus, it is suggested that the accumulation of the pigmented phytoalexins in sorghum mesocotyls is a non-specific response of the tissues towards mechanical injury or fungal infection. SAO PAULO STATE UNIV,SCH AGR,DEPT PLANT PATHOL,PIRACICABA,BRAZIL SAO PAULO STATE UNIV,SCH AGR,DEPT PLANT PATHOL,PIRACICABA,BRAZIL