Synergic effect of foliar applications of glucose and gibberellin on quality of Eruca sativa L.

Carlo Nicoletto [Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova]
Aline Carolina Galvao [Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova]
Pietro Sica [Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova]
Giampaolo Zanin [Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova]
Paolo Sambo [Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova]

Rocket salad (Eruca sativa L.) is an important leafy vegetable well known for its spicy taste and nutraceutical properties, due to secondary metabolites e.g. glucosinolates. Gibberellic acid (GA3) has a synergic effect on different vegetable quality when applied with glucose. However, few studies on its foliar application in leafy vegetables are available. This experiment aimed to evaluate the effect on yield and quality of rocket salad treated with demineralized water (CTRL) and glucose 30 g L-1 (GLU) in combination with GA3 at 0, 50, 100, 150, and 200 mg L-1 (GLU+GA3/0, 50, 100, 150 and 200). Treatments had no significant effect on yield and dry matter. Glucosinolates and FRAP had no significant variation among treatments and control. Chlorophyll a and b contents were not affected by treatments, whereas total phenols and anthocyanin in the control had a significant higher concentration compared to the other treatments. A principal component analysis of quality traits was carried out and by analyzing graphic vectors. It was possible to discriminate three groups: GLU+GA3-0, GLU+GA3-200, and GLU+GA3-100; CTRL, GLU+GA3-50; GLU+GA3-150 due to antioxidant, pigments and glucosinolates respectively. Likely, due to its short growing cycle, the treatments did not have significant effects on the rocket salad baby leaf as it had in other species.

Scarica l'articolo completo

2 Nicoletto et al.pdf 1 Mb