Water regime and osmotic adjustment in cuban wheat varieties (Triticum aestivum y T. durum) crops under saline conditions
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Abstract
osmotic adjustment in twelve cuban wheat varieties of Triticum
aestivum and Triticum durum species crops under salinity
conditions were evaluated. 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. As results a significant decrease of
water potential values were obtained in most varieties 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 varieties and
its values were minor to -0,6 MPa. All varieties carried out the
osmotic adjustment, being the most significant value AO=0,3 MPa
in INIFATRM-36, INIFATRM-32, INIFATRM�??37 varieties.
A considerable variability in stress salinity response between
varieties and species for the three evaluated variables was
observed.
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