Potential of a multiparametric optical sensor for determining in situ the maturity components of red and white Vitis vinifera wine grapes.
نویسندگان
چکیده
A nondestructive fluorescence-based technique for evaluating Vitis vinifera L. grape maturity using a portable sensor (Multiplex) is presented. It provides indices of anthocyanins and chlorophyll in Cabernet Sauvignon, Merlot, and Sangiovese red grapes and of flavonols and chlorophyll in Vermentino white grapes. The good exponential relationship between the anthocyanin index and the actual anthocyanin content determined by wet chemistry was used to estimate grape anthocyanins from in field sensor data during ripening. Marked differences were found in the kinetics and the amount of anthocyanins between cultivars and between seasons. A sensor-driven mapping of the anthocyanin content in the grapes, expressed as g·kg(-1) fresh weight, was performed on a 7-ha vineyard planted with Sangiovese. In the Vermentino, the flavonol index was favorably correlated to the actual content of berry skin flavonols determined by means of HPLC analysis of skin extracts. It was used to make a nondestructive estimate of the evolution in the flavonol concentration in grape berry samplings. The chlorophyll index was inversely correlated in a linear manner to the total soluble solids (°Brix): it could, therefore, be used as a new index of technological maturity. The fluorescence sensor (Multiplex) possesses a high potential for representing an important innovative tool for controlling grape maturity in precision viticulture.
منابع مشابه
Color and Color Stability of Red Wine from Noble (Vitis rotundifolia Michx.) and Cabernet Sauvignon (Vitis vinifera L.) at Various pH
Muscadine grapes (Vitis rotundifolia) are the most widely planted grapes in the south and southeast United States due to their suitability in these areas. Most of the commercial muscadine grape crop is used to produce wine. Wine made from suitable cultivars of muscadine grapes possesses a very fruity, unique flavor and aroma that appeals to many people in the South. However, muscadine grape pro...
متن کاملEvaluating the Polyphenol Profile in Three Segregating Grape (Vitis vinifera L.) Populations
This paper explores the characteristics of the anthocyanin and flavonol composition and content in grapes from plants resulting from intraspecific crosses of Vitis vinifera varieties Monastrell × Cabernet Sauvignon, Monastrell × Syrah, and Monastrell × Barbera, in order to acquire information for future breeding programs. The anthocyanin and flavonol compositions of twenty-seven hybrids bearing...
متن کاملPhenolic Contents and Compositions in Skins of Red Wine Grape Cultivars among Various Genetic Backgrounds and Originations
In order to analyze and compare the phenolic characteristics of red wine grapes with diverse genetic backgrounds, skin phenolics among 21 different cultivars belonging to Vitis vinifera L., East Asian and North American Vitis species and hybrids, as well as 2 varieties of muscadine grapes were estimated by HPLC-MS/MS. There were 45 anthocyanins, 28 flavonols, 8 flavan-3-ols, 9 cinnamic acids, 5...
متن کاملViticulture, enology and marketing for cold-hardy grapes
Anthocyanins in grapes. Red wine color is incredibly complex. Any given wine is composed of hundreds of dynamic chemicals that are interacting and changing during the winemaking process. While evolution of color from purple-red to brick red in Vitis vinifera wines is familiar to both winemaking and scientific communities, the color of hybrid wines is less predictable, and often varies from the ...
متن کاملAntioxidant Activity, Total Phenolic Compounds and Anthocyanin Contents in 35 Different Grapevine (Vitis vinifera L.) Cultivars Grown in Fars Province
Grapes are significant sources of nutritional antioxidants as well as biologically active dietary components. This study was carried out to determine the amount of total phenols, anthocyanins and antioxidant activity of 35 grapevine (Vitis vinifera L.) cultivars grown in Fars province (Iran). Ripened bunches were randomly harvested from grapevine collection in Zarghan (Fars province, Iran) Agri...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of agricultural and food chemistry
دوره 61 50 شماره
صفحات -
تاریخ انتشار 2013