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Idesia (Arica)

versão On-line ISSN 0718-3429

Resumo

GRIMALDO JUAREZ, Onécimo et al. Concentration of nutrients in leaf and cucumber quality in plants grafted under salin conditions. Idesia [online]. 2020, vol.38, n.2, pp.41-48. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292020000200041.

Salinity is one of the main problems in cucumber production systems (Cucumis sativus) in arid and semi-arid areas, affecting ion homeostasis and consequently fruit quality. An alternative of production is the use of graft, however, the effect depends on a specific rootstock-variety combination. Therefore, in the present investigation, the objective was to evaluate the concentration of ions in leaf and fruit quality in cucumber variety Tirano in twoplant conditions (normal and grafted) under three levels of salinity (3.0, 4.5 and 6.0 dS m -1 ). Potassium content and potassium-sodium ratio in leaf were altered by the combination of plant condition and salinity level, expressing higher value in grafted plant at conductivity of 3.0 dS m -1 . Sodium concentration in leaf increased with the level of salinity. In plant conditions, sodium concentration was higher in normal than ingrafted. Fruit weight and diameter varied with plant conditions and salinity levels. The grafted plant at a salinity of 6.0 dS m -1 registered higher weight and diameter of fruit. Length, external and internal firmness and soluble solids content ranged from 16.6 to 19.2 cm, 73.8 to 74.1 N, 58.0 to 74.1 N and 4.9 to 5.1%, respectively, without significant effects by thefactors evaluated. The Forticuke F1 rootstock favors the assimilation of potassium and potassium/sodium ratio, reduces the sodium content in leaf at a concentration of 3.0 and 4.5 dS m -1 and increases fruit weight and diameter in cucumber in the environment 6.0 dS m -1 . Length, firmness and content of soluble solids were not modified by the rootstock at different levels of salinity.

Palavras-chave : Cucumis sativus; graft; salinity; concentration of ions; fruit quality.

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