Journal
PLANT SIGNALING & BEHAVIOR
Volume 5, Issue 10, Pages 1229-1233Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.5.10.12835
Keywords
cactaceae; Opuntia leucotricha; Penicillium chrysogenum; Phoma sp.; physiological dormancy; prickly pear; seed germination; Trichoderma spp
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Funding
- SEMARNAT [2006-S-3406]
- SAGARPA [2004-CO1-216]
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Recently, we found that fungi are involved in breaking seed dormancy of Opuntia streptacantha, and that the effect of fungi on seeds is species-specific. However, the effect of fungi on seed germination from other Opuntia spp. has not been evaluated. Thus, we evaluated the effect of four fungal species (Penicillium chrysogenum, Phoma sp., Trichoderma harzianum, Trichoderma koningii) on the germination of Opuntia leucotricha, an abundant species in the Chihuahuan Desert, Mexico. We found that seeds inoculated with the four fungal species had higher germination than control seeds. Trichoderma spp. were the most effective. Our results strongly indicate that fungi are involved in breaking seed dormancy of O. leucotricha. Thus, we suggest that these fungi could promote seed germination from other Opuntia species.
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