Effect of the soil matric potential on the germination capacity of prosopis chilensis, quillaja saponaria and cryptocarya alba from contrasting geographical origins
Autor
Faúndez, Ángela
Magni, Carlos R.
Martínez-Herrera, Eduardo
Espinoza, Sergio
Vaswani, Suraj A.
Yañez, Marco A.
Gréz, Iván
Seguel Seguel, Oscar
Abarca-Rojas, Betsabé
Quiroz, Iván A.
Fecha
2022Resumen
As a consequence of the megadrought in Central Chile, it is expected that most of the
distribution of woody species will be narrowed in the northern limits because of restrictions imposed
by soil matric potential on seed germination. In this study, we analyzed the effect of the soil matric
potential on seed germination and initial recruitment of the sclerophyllous species Prosopis chilensis,
Quillaja saponaria and Cryptocarya alba from contrasting geographic origins (i.e., seed sources). We
evaluated the germination capacity (%) under different matric potentials (i.e., 0, −6, −33, −750 and
−1250 kPa) for 100 days. Soil matric potential of −1250 kPa negatively affected the germination
capacity of the three species. P. chilensis seeds stopped germinating under soil matric potential close
to −1200 kPa, whereas in Q. saponaria and C. alba the complete inhibition of germination was under
−1000 kPa. Seed sources also differed in their germination capacity by soil matric potential: northern
seed sources of P. chilensis germinated with the lowest soil matric potential. There was no clear trend
in Q. saponaria and C. alba, but in general, southern seed sources performed better than the northern
ones. The results showed that Ψm in the soil played an important role in the germinative capacity
against different seed source origins, but not in soils with a north–south gradient.
Fuente
Plants, 11(21), 2963Link de Acceso
Click aquí para ver el documentoIdentificador DOI
doi.org/10.3390/plants11212963Colecciones
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