Studies on relationship between water regime and flavour strength in watercress(Rorippa nasturtium-aquaticum(L) Hayek), cabbage (Brassica oleracea capitata) and onion(Allium cepa)

Growth stress induces glucosinolate changes in pakchoy (Brassica campestris ssp. chinensis)

“…The total GS concentrations were significantly higher in the older tissues of stressed plants than the unstressed control (Tables 2 and 3). Theie results are consistent with prior studies that reported increased GS levels in stressed plants (Freeman and Mossadeghi 1973;Lammerink et al 1984;Shelp et al 1992Shattuck 1993). …”

“…1989;Mailer 1989) including nutrient imbalances (Kaur et al. 1990; Shelp et al 1992), moisture deficiency (Freeman and Mossadeghi 1973;Mailer und ,r, Pratley 1990), insect infestation (Koritsas et al. 1989;Birch et al.…”

Triangle tests indicate that irrigation timing affects fresh cabbage sensory quality

“…The lower PM of cabbage not irrigated during head development may have resulted in stronger flavor due to a higher concentration of dry matter, including organic flavor compounds. Freeman and Mossadeghi (1973) reported both stronger flavor and higher concentrations of volatile isothiocyanates (flavor compounds) in waterstressed cabbage relative to well-watered cabbage. Strong flavor generally corresponds to a decrease in acceptability of fresh cabbage (Ball et al, 1999;Yano et al, 1990).…”

“…Some production factors may also play a role in human perception of cabbage quality. For example, panelists in triangle tests distinguished among cabbage grown under varying soil moisture and sulfur conditions (Freeman & Mossadeghi, 1972, 1973. Also, in employing a three-point hedonic scale and 82 panelists, Yano, Saijo, Sugawara, and Ohta (1990) detected differences in preference for shredded samples of five cabbage varieties and concluded that flavor and moisture content are highly important in determining preference.…”

“…However, although soil moisture availability strongly influences plant physiology, the effect of irrigation on cabbage flavor is under-studied. Freeman and Mossadeghi (1973) used a variety currently not of commercial importance and failed to account for the crop developmental stage at which irrigation was applied or corresponding effects on important physical head traits. Although utilized in other areas, irrigation is not regularly applied to cabbage grown in the Midwest, partly due to the relative scarcity of water resources and costs associated with irrigation (Swaider, Ware, & Shoemaker, 2002).…”