Resumo

ORDONEZ-VALENCIA, Claudia et al. Early morphological development of sclerotia of Sclerotinia sclerotiorum in the presence of potassium bicarbonate. Rev. mex. fitopatol [online]. 2018, vol.36, n.3, pp.363-378. ISSN 2007-8080.  https://doi.org/10.18781/r.mex.fit.1803-4.

Sclerotinia sclerotiorum is a pathogen of great economic importance that causes significant losses in various crops. Control of the pathogen is difficult since this fungus forms resistant sclerotia that can survive in the soil for many years. This study evaluated the morphological development of S. sclerotiorum sclerotium primordia by using the Riddell technique, and different concentrations of potassium bicarbonate (KHCO3). The formation of primordia began from hyphae. However, as the concentration of KHCO3 increased, morphological changes were observed in the initiation phase of the sclerotia, as well as in the inhibition of their development when using a 50 mM concentration of KHCO3. This chemical compound modifies the morphology and inhibits the development of sclerotia in their initial stages; hence it may offer potential as an alternative to synthetic fungicides for the control of plant diseases caused by S. sclerotiorum.

Palavras-chave : antifungal agent; morphogenesis; inhibition; microscopy.