Temperature and water requirements for germination and effects of discontinuous hydration on germinated seed survival in Tillandsia recurvata L.
Por:
Montes-Recinas, S, Marquez-Guzman, J, Orozco-Segovia, A
Publicada:
1 jul 2012
Resumen:
Tillandsia recurvata is an epiphytic bromeliad with a wide distribution in the Americas; however, little is known about the development of its post-seminal adaptations for survival in epiphytic environments. The purpose of this study was to define the temperature and water requirements for the germination of T. recurvata seeds. The absence of radicle emergence in T. recurvata seeds resulted in 2 stages of germination: swollen with broken seed coat (stage-1) and chlorophyllic embryos (stage-2). The effects of partial or discontinuous hydration on germinated seed survival were also assessed. The seeds were collected in a semi-arid shrubland of Mexico City. We explored: (1) whether water vapour can provide a sufficient water source for germination; (2) the temperature required for germination stage-1 and the optimal and critical osmotic potentials for germination in both germination stages; (3) the effect of seed incubation at different osmotic potentials that undergo subsequent dehydrati
Filiaciones:
Montes-Recinas, S:
Univ Nacl Autonoma Mexico, Dept Ecol Func, Inst Ecol, Mexico City 04510, DF, Mexico
Marquez-Guzman, J:
Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico
Orozco-Segovia, A:
Univ Nacl Autonoma Mexico, Dept Ecol Func, Inst Ecol, Mexico City 04510, DF, Mexico
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