English to Spanish Science Biology (-tech,-chem,micro-) biochemistry

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Despite the genotypical differences in the K+/Na+ uptake ratio between the
'natrophobic' maize and the 'natrophilic' sugar beet (Section 10.2) in both plant species
the presence of Ca^"^ shifts the uptake ratio in favour of K+ at the expense of Na+'. In
this experiment only net uptake rates were measured. Calcium may have exerted this
influence on K+/Na+ selectivity via stimulation of the Na+ efflux pump, either as
countertransport (antiport) of K+/Na+ (Jeschke and Jambor, 1981) or of H+/Na+
(Mennen et aL, 1990), or via general effects on plasma membrane integrity, e.g.
affecting ion channels.

... affected the leaf K+/Na+ uptake ratio within all genotypes, but the difference among the genotypes and replicates was not significant (P>0.05) (Table 4).

On the basis of relative K+/Na+ uptake ratio (Table 4.1.30), Acc.No.015382 was ranked at 38 or 39 in the five NaCl concentrations and overall ranked at No. 39.

These genotypical differences reflect differences in cation/anion uptake ratios (Bekele et al, 1983).

As a consequence of the differences in cation-anion uptake ratio, nitrogen assimilation