Water content, osmotic potential and abscisic acid level as indices of freezing tolerance in barleys
2000
Prasil, I. | Kadlecova, Z. | Faltus, M. | Prasilova, P. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic))
Evaluation of winter-hardiness and freezing tolerance in a set of two varieties of winter barley (Lunet, Marinka) and one spring variety (Akcent) by field methods was compared with a laboratory freezing test and with some physiological and biochemical traits as freezing tolerance indicators (water content, osmotic potential, abscisic acid content). As for the physiological and biochemical traits, the water content was in highest correlation with varietal freezing tolerance classification; it significantly decreased in all varieties after hardening. A similar classification was determined for osmotic potential, which also decreased after hardening, but there was a significant difference between Lunet and Akcent varieties only. On the contrary, no differences in abscisic acid content were observed between the varieties either before or after hardening.
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