Salinity effects on water variables water and osmotic potential and osmotic adjustment in cuban wheat cultivars (Triticum aestivum L. and T. durum L.)
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Abstract
evaluate salinity effect on water and osmotic potential and
osmotic adjustment in twelve wheat cultivars of Triticum
aestivum and Triticum durum species at early stages of
development was studied. The plants were settled down in a
hothouses under hidropony conditions at a salinity level of
8 dS.m-1, a control treatment with an electric conductivity of
0,36 dS.m-1 was mounted. The evaluations were carried out at
25 days after germination. Results indicated a significant
decrease of water potential values in most cultivars in all
measured organs and a significant decrease of its values was
observed from roots to leaves in order to assureb water
gradient. The varieties that didn�??t diminish significantly their
water potential showed similar behavior in the three evaluated
organs, although the potential gradient was stayed. The
osmotic potential diminished significantly in all cultivars and
its values were minor to -0,6 MPa. All cultivars carried out the
osmotic adjustment, being the most significant value
AO = 0,3 MPa in INIFAT RM-36, INIFAT RM-32, INIFAT RM-37
cultivars. A considerable variability in stress salinity response
between cultivars and species for the three evaluated variables
was observed.
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