Application of the textural evaluation in grapes berries based on puncture test and fisher discriminant analysis

The objective of the present study was to test ten textural properties we edited for characterizing the puncture properties of grapes from force / displacement curves. Weather it can represent the whole character of grape berries or not. The most critical textural properties have been found to provide theoretical basis in the textural evaluation.Four different cultivars:Red Globe,kyoho,White Rosario,Horse milk grapes acted as test materials.Through the cool room to simulate the cold storage conditions,Through the constant temperature and humidity box to simulate the transport and shelf storage conditions.Respectively puncture test were carried at storage conditions of different temperature per same time for discriminant analysis.The results showed that: Above 0 ℃ storage condition the ten computed parameters gave a good summary of the information present in the curve. At 0 ℃ storage condition,the ten computed parameters can't distinguish the grapes. Skin hardness,skin stiffness and berry deformation is the most critical textural parameters for these parameters during the grapes storage.