Are fungi important for breaking seed dormancy in desert species? Experimental evidence in Opuntia streptacantha (Cactaceae).

@article{DelgadoSnchez2011AreFI,
  title={Are fungi important for breaking seed dormancy in desert species? Experimental evidence in Opuntia streptacantha (Cactaceae).},
  author={Pablo Delgado-S{\'a}nchez and Mar{\'i}a Azucena Ortega-Amaro and Juan Francisco Jim{\'e}nez-Bremont and Joel Flores},
  journal={Plant biology},
  year={2011},
  volume={13 1},
  pages={154-9}
}
Seeds of Opuntia spp. have physiological dormancy; they need a period of after-ripening to break dormancy, and the embryos have low growth potential. We evaluated the combined effects of seed age and presence of fungi on the testa on germination of Opuntia streptacantha, an abundant species in the Chihuahuan Desert (Mexico), assuming that older seeds have broken seed dormancy and fungi can reduce mechanical resistance to germination. In a preliminary experiment, we found no germination of 9… CONTINUE READING
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