1,721,130 research outputs found
Test di screening per resistenza alla siccità: tecniche non convenzionali di selezione genetica in frumento duro.
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Nutritional and technological quality of the durum wheat
No full textDurum wheat quality is a complex system that combines yield characteristics, cultivation conditions and certification requirements. In this review, the technological and nutritional aspects of grain quality were evaluated in relation to the influence of climate and agronomic practices. In particular, the technological quality was investigated with regard to the kind of processed product (pasta, bread, couscous, burghul). The influence of nitrogen and sulphur nutrition, temperature, water regime and organic farming on grain quality was evaluated. Furthermore, the nutritional characteristics of durum wheat related to starch, proteins, lipids, vitamins, fibres and mineral ions content were examined. Special focus was on the antioxidant activity capable of preventing chronic and degenerative diseases thanks to the high content in bioactive compounds, as phenols, tocols, carotenoids and fibres in whole grain. In the light of the new direction of the Community agricultural policy and of the growing interest in human nutrition, two prospects for development of the durum wheat sector were delineated: i) developing certified products (PGI, PDO and organic); ii) promoting production and processing technologies aimed at increasing the level of bioactive compounds in durum wheat grain and its by-products
Caratterizzazione agro-ecologica del territorio garganico
No full text(a cura di Flagella Z. e Tarantino E.
Influenza dello stato idrico e dello stadio fenologico sulla fluorescenza della clorofilla a "in vivo", In "La durogranicoltura quale fattore di sviluppo per l'agricoltura meridionale"
No full textOsmotic adjustment and photosynthetic electron transport efficiency in durum wheat cultivars under drought.
No full textPhotochemical quenching of chlorophyll fluorescence and drought tolerance in different durum wheat (Triticum durum) cultivars
Full text linkThe aim of this study was to identify a fluorescence parameter whose estimate could be used reliably for a drought tolerance test in durum wheat (Triticum durum). Twenty five cultivars were grown in a glasshouse over two seasons (1987/88 and 1988/89) at Foggia, Southern Italy. Photochemical and non-photochemical quenching (qQ and qE), the half time of fiuorescence decay (tP1/2) and the initial slope of fiuorescence decay (ISps) were measured on control and dehydrated pre-darkened excised leaves; qQ and qE were measured twice: first at 14 s after actinic illumination and second at the steady state. No great difference in qQ and qE was apparent between control and dehydrated leaves at the steady state; however, at 14 s after illumination there was a decrease in qQ and in ISPS and an increase in tPl in dehydrated leaves. The predictive capability of fluorescence parameters was assessed by comparison with a yield-based drought susceptibility index (DSI). The percentage decrease in qQ at 14 s showed the highest correlation with DSI (r = 0.75, significant at P< 0.001), so it may be considered a good indicator of drought tolerance in durum wheat. Results obtained at different developmental stages with different fluorescence levels (Fo, P and Fm) and parameters (qQ, qE and tP1/2) indicated that for maximum reliability the test must be applied at the vegetative phase. © 1994 Cambridge University Press
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