Resumo

DIAZ FRANCO, Arturo  e  PENA DEL RIO, María de los Ángeles. Sorghum plant characteristics and yield and its interaction with mycorrhizal fungi under irrigation and rainfed conditions. Rev. Mex. Cienc. Agríc [online]. 2014, vol.5, n.4, pp.717-722. ISSN 2007-0934.

Sorghum response ('DK- 345') to six native strains of experimental arbuscular mycorrhizal fungi (AMF) [3 (Funneliformis mossae), 20 (Gigaspora albida), 32 (F. mossae), 35 (F. mossae), 39 (F. mossae), 55 (Gigaspora sp.)] was compared to mycorrhizal INIFAP (Rhizophagus intraradices) and non-inoculated check under irrigated and rainfed conditions. The chlorophyll index (SPAD) was measured in three stages (flag leaf, flowering and end of flowering), in addition to plant height, biomass and grain yield. In flag leaf, chlorophyll index variations among AMF strains and humidity conditions were observed. AMF did not influence the chlorophyll index during flowering. Although at the end of flowering, outstanding strains were 55 and mycorrhizal INIFAP. Plant height was similar among AMF, but 16.5 cm higher in irrigation. Biomass was similar among the AMF but higher than control. The highest grain yield in the two humidity conditions was obtained with strain 55 and mycorrhizal INIFAP. This study showed the comparative potential of native AMF strains in sorghum.

Palavras-chave : Sorghum bicolor; native strains; fungi; endomycorrhizal.