ISHS International Symposium on Growing Media and Hydroponics WAYS OF REDUCING ROCKET SALAD NITRATE CONTENT

Soilless cultivation systems were primarily developed in response to the excessive spread of soil pathogens; however, they also allow an optimal control of plant grow, high productivity and product quality as well as very high efficiency of water and fertilizer use. At the same time, consumers remain critical towards soilless-cultivated vegetables, mainly due to the perception of these techniques as unnatural, resulting from artificial growth and consequently characterized by low quality. This mini review analyzes the evolutionary process of soilless cultivation within a vision of agriculture that supports environmental sustainability as the central theme of the discussion. Current knowledge suggests that, although apparently opposite, organic and high-tech soilless cultivation have several common or converging points in view of a sustainable use of resources on the planet. As a consequence, new policies should be oriented toward a reduction of environmental “pressure” by introducing a process certification of low environmental impact, which, together with an adequate product certification, related not only to the environmental aspect but also to product quality, can reduce the opposition of the two cultivation systems.

The Mediterranean Diet, through a healthy profile of fat intake, carbohydrate at low glycaemic index, high content of dietary fibre, antioxidants and anti-inflammatory compounds, reduces the risk of certain pathologies such as cardiovascular disease. However, it represents anything much more than a dietary regimen and it is also characterised by its links to the various food cultures of the different countries of the Mediterranean area. On the other hand, the traditional cuisine of the Puglia region (Southern Italy) is based on a nutritional model mainly vegetarian because only a small share of calories is of animal origin; cereals are the basic ingredient, pulses and olive oil the main protein and fat source, respectively. In this paper we reported the culture, history, identity and heritage of this culinary model of the Southern Italy tradition to understand possible linkages with the Mediterranean Diet. Moreover, some traditional recipes of the Puglia cuisine are examined as regards gastronomic and nutritional aspects, also for better explaining its relationship with the food style best famous in the world

The sea fennel (Crithmum maritimum L.) is a wild plant from the same family of the parsley and celery, that is used as a fresh ingredient for many food preparations. In this work, some alternative culinary uses for this aromatic plant as a dried ingredient have been proposed. Therefore, two drying technologies were applied with the aim to obtain a new spice-colorant without chemical synthesis. The results are discussed in terms of visual quality, odor and taste of the dehydrated products. Moreover, the effects on the overall sensory properties of some dishes prepared using the two different types of this new spice are reported. The introduction of the dried sea fennel in gastronomy could increase the sensory appeal of some traditional dishes and support the creation of many new recipes

The use of iodine-biofortified vegetables may be a health alternative instead of iodine-biofortified salt for preventing iodine (I) deficiency and related human disorders. In this study, four Brassica genotypes (broccoli raab, curly kale, mizuna, red mustard) were hydroponically grown with three I-IO₃⁻ rates (0, 0.75 and 1.5 mg/L) to produce iodine-biofortified vegetables. Crop performances and quality traits were analyzed; iodine content was measured on raw, boiled, and steamed vegetables. The highest I rate generally increased I content in all Brassica genotypes, without plants toxicity effects in terms of reduced growth or morphological symptoms. After 21 day-iodine biofortification, the highest I content (49.5 µg/100 g Fresh Weight (FW)) was reached in broccoli raab shoots, while after 43 day-iodine biofortification, genotype differences were flattened and the highest I content (66 µg/100 g FW, on average) was obtained using 1.5 mg I-IO₃/L. Nitrate content (ranging from 1800 to 4575 mg/kg FW) was generally higher with 0.75 mg I-IO₃/L, although it depended on genotypes. Generally, boiling reduced iodine content, while steaming increased or left it unchanged, depending on genotypes. Applying low levels of I proved to be suitable, since it could contribute to the partial intake of the recommended dose of 150 µg/day: A serving size of 100 g may supply on average 24% of the recommended dose. Cooking method should be chosen in order to preserve and/or enhance the final I amount.