Article

Plant Cell, Tissue and Organ Culture

, Volume 74, Issue 3, pp 237-241

Increased photosyntethic efficiency generated by fungal symbiosis in Agave victoria-reginae

  • Eva N. ObledoAffiliated withCentro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C Email author 
  • , Lilia B. Barragán-BarragánAffiliated withDepartamento de Investigacion y Desarrollo, Tequila Herradura
  • , Porfirio Gutiérrez-GonzálezAffiliated withCentro Universitario de Ciencias Exactas e Ingenierías, Departamento de Matemáticas, Universidad de Guadalajara
  • , Blanca C. Ramírez-HernándezAffiliated withCentro Universitario de Ciencias Biológicas y Agropecuarias, Departamento de Fisiología Vegetal, Universidad de Guadalajara
  • , José J. RamírezAffiliated withCentro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C
  • , Benjamín Rodríguez-GarayAffiliated withCentro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C

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Abstract

A unique non-pathogenic strain of Fusarium oxysporum was isolated from field-collected plants of Agave victoria-reginae Moore. It was then re-introduced into micropropagated plants of the same species under greenhouse conditions. The fungic inoculation induced a 225% increase in the length of roots, 50% in the number of root branches and 50% in the number of stomata on the adaxial surface of leaves. Also, an increment of 167% in nocturnal acidity and a 122% in malic acid was observed and nocturnal pH was significantly more acid in the inoculated plants. Total chlorophyll and sugar content increased 14 and 172%, respectively. These results indicate a higher photosynthetic efficiency of the plants inoculated with the fungus than those plants which were not inoculated; therefore the association of this unique F. oxysporum strain with A. victoria-reginae Moore was considered as a beneficial symbiosis.

Agave beneficial symbiosis CAM plants endophyte Fusarium oxysporum