Effect of NaCl stress on chloride content, actual osmotic potential and growth of two Cuban tomato cultivars
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Abstract
content of Cl-, actual osmotic potential and growth of two
tomato cultivars, cultivated under hydroponic conditions and
growth chamber with controlled atmosphere was studied.
Evaluations were carried out after 8, 15 and 22 days of saline
treatment. Results showed that, in general, INCA9[1] plants
presented higher concentrations of Cl- in root extract and lower
in leaf extract and root exudate compared to Amalia cv. The
osmotic potential variations due to salinity were not as defined
and stable as in the case of ion Cl- content. The analysis of
TRC (relative growth rate) indicated the presence of a certain
adaptability to saline stress in INCA 9[1] plants, while mean
resistance index indicates that plants of this cultivar are more
sensitive to salinity in the first days of NaCl stress and Amalia
presents a bigger sensibility to the hyperionic component of
this stress.
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