The seed water content as a time-independent physiological trait during germination in wild tree species such as Ceiba aesculifolia
Por:
Gomez-Maqueo, Ximena, SORIANO, DIANA, Velazquez-Rosas, Noe, Alvarado-Lopez, Sandra, Jimenez-Duran, Karina, del Mar Garciadiego, Maria, Gamboa-deBuen, Alicia
Publicada:
26 jun 2020
Categoría:
Multidisciplinary
Resumen:
Seeds constitute a key physiological stage in plants life cycle. During
seed germination, there is a spatial-temporal imbibition pattern that
correlates with described physiological processes. However, only the
moment of testa rupture has been described as a critical, discrete
stage. Could a specific relative water content (RWC) value reflect a
physiological stage useful for comparisons between seed batches? We
tracked seed-by-seed imbibition during germination to homogenize
sampling and selected a transcriptomic approach to analyse the
physiological transitions that occur in seed batches collected in
different years and with contrasting phenotypic responses to a priming
treatment. The seed RWC reflected the transcriptional transitions that
occur during germination, regardless of imbibition time or collection
year, and revealed a set of biological processes that occur in the dry
seed and during early germination are associated with the phenotypic
response to priming. As climate shifts, so do the timing of
developmental events important for determining organismal fitness, and
poses another challenge to the comprehension of molecular and
physiological processes driving the interaction between organisms and
environment. In this study, we demonstrate that the use of physiological
traits, specific to a particular developmental stage, is a reliable
time-independent approach.
Filiaciones:
Gomez-Maqueo, Ximena:
Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City, DF, Mexico
SORIANO, DIANA:
Univ Nacl Autonoma Mexico, Inst Biol, Mexico City, DF, Mexico
Velazquez-Rosas, Noe:
Univ Veracruzana, Ctr Invest Trop, Xalapa, Veracruz, Mexico
Alvarado-Lopez, Sandra:
Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City, DF, Mexico
Jimenez-Duran, Karina:
Univ Nacl Autonoma Mexico, Fac Quim, Mexico City, DF, Mexico
del Mar Garciadiego, Maria:
Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City, DF, Mexico
Gamboa-deBuen, Alicia:
Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City, DF, Mexico
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