Resumo

RUIZ S., Rafael; MOYANO A., Stella  e  NAVIA P., Tania. Accumulation of nitrogen compounds as related to the "soft berry" problem in table grapes.. Agric. Téc. [online]. 2004, vol.64, n.4, pp. 426-430. ISSN 0365-2807.  http://dx.doi.org/10.4067/S0365-28072004000400012.

With the objective of evaluating a probable association between N metabolic disorders and the problem known as "soft berry" at the beginning of 2002 rachis and berries of bunches from a vineyard, Vitis vinifera L. cv. Thompson Seedless, of the VI Region, Chile (34º15’ S. lat, 72º25’ W. long) with the presence of "soft", "intermediate", and "firm" berries were collected The results indicated that soft or intermediate berries had higher levels of N in the pulp and skin, and higher arginine and putrescine levels in berries and rachis. Evaluations of the fruit indicated that soft berries showed less firmness, less than 190 g-strength mm^-1, less weight and less soluble solids (ºBrix). The results indicated some similarity with factors that have been associated to the disorder known as "bunch stem necrosis" or "waterberry".

Palavras-chave : putrescine; physiological disorders; nitrogen; arginine; berry firmness; Vitis vinifera; bunch stem necrosis.