COSTA JÚNIOR, J. E. V.; http://lattes.cnpq.br/2491231914261726; COSTA JÚNIOR, José Edimar Vieira.
Resumo:
The salinity is one of the factors that affects plant productivity. The introduction of trees
consists in alternatives for recovering of degradated salt areas, however, the success
of this process depends of knowledge of its effects on the species planted. This study
aimed to verify the effects of salinity on plant growth of organic solutes and
accumulation in plants of Cnidoscolus quercifolius. The treatments consisted of five
levels of NaCl (0; 50; 100; 200; and 400 mmol m-3), distributed in a completely
randomized design with four replications. Plants were grown in Leonard pots containing
washed sand and nutrient solution, during 60 days under salinity conditions. Height,
diameter, dry mass of roots, stems, leaves, shoots and total area accumulation of
amino acids, proteins and soluble sugars of roots and leaves, were determined. Salinity
caused a linear reduction in growth, dry matter and soluble sugars. The results showed
that plants were intolerant to high level of salinity imposed, not being able to adjust
osmotically.