Effects of pH and titratable acidity on the growth and development of Monilinia laxa (Aderh. & Ruhl.) in vitro and in vivo.

Obi, V.I. ; Barriuso, J.J. (Universidad de Zaragoza) ; Gogorcena, Y. (Universidad de Zaragoza)

Resumen: This investigation examines the effects of pH and titratable acidity on the growth and developments of a strain of Monilinia laxa (Aderhold & Ruhland) at seven different pH levels in Potato Dextrose Agar media and on peach fruit from formation to commercial maturity. The fungi growth was obtained by daily measurement of mycelia on the pH amended Potato Dextrose Agar. The sporulation performance was determined after 30 days of culture incubation. Fruits were inoculated with M. laxa, from fruit set to maturity, on weekly basis for brown rot susceptibility. The pathogen development, in vitro, was affected, by the pH (2.4–11.52) amended nutrient media. M. laxa exhibited variation in its growth and sporulation capacities on the seven pH amended PDA, preferring relatively moderate acidic conditions for optimum performance. In the in vitro analysis, there was mycelia growth at pH 2.40 to 8.84, while pH 11.52 did not support any mycelia growth. There was a continuous and stable increase in weight of fruit as it developed whereas the fruit size increased, then decreased and finally increased as the fruit develops. The acidity dynamics exhibited a non-sinusoidal waveform through the growth and development of the fruit. In all these characteristic variations, M. laxa did not develop infection or shown any brown rot incidence in the fruit until the period of commercial maturity.

Idioma: Inglés

DOI: 10.1007/s10658-017-1413-4

Año: 2018

Publicado en: European Journal of Plant Pathology 151, 3 (2018), 781-790
ISSN: 0929-1873

Factor impacto JCR: 1.744 (2018)

Categ. JCR: HORTICULTURE rank: 9 / 35 = 0.257 (2018) - Q2 - T1
Categ. JCR: AGRONOMY rank: 30 / 89 = 0.337 (2018) - Q2 - T2
Categ. JCR: PLANT SCIENCES rank: 98 / 228 = 0.43 (2018) - Q2 - T2

Factor impacto SCIMAGO: 0.709 - Agronomy and Crop Science (Q1) - Plant Science (Q1) - Horticulture (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/A44
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/AGL2014-52063R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Producción Vegetal (Dpto. CC.Agrar.y Medio Natural)
Área (Departamento): Área Botánica (Dpto. CC.Agrar.y Medio Natural)