Resumen

ROLLWAGEN, D.G  y  CARVALHO, R.I.N. Physiological quality of chamomile [Chamomilla recutita (L.) Rauschert] seeds after accelerated aging and salt stress. Rev. bras. plantas med. [online]. 2011, vol.13, n.2, pp. 139-145. ISSN 1516-0572.  http://dx.doi.org/10.1590/S1516-05722011000200003.

The aim of this study was to verify the physiological quality of chamomile seeds subjected to different accelerated aging periods and salt stress. The experiments were carried out in the Laboratory of Seed Technique, PUCPR, São José dos Pinhais, Paraná State, Brazil. The accelerated aging periods were 0, 24, 48, 72 and 96 h and the salt stress was induced by sodium chloride solutions with osmotic potentials of 0, -0.2, -0.4, -0.6, -0.8, -1.0 MPa, both with four replicates. The analyzed variables were: germination, germination velocity index (GVI), average germination time (AGT), average germination velocity (AGV) and entropy. Experimental design was in randomized blocks. Chamomile seeds had their physiological quality affected after 24 h of accelerated aging and under salt stress caused by the solution with osmotic potential of -0.6 MPa

Palabras llave : germination; accelerated aging; salt stress; osmotic potential.