@article{oai:niigata-u.repo.nii.ac.jp:00002817, author = {知野, 秀次 and 松本, 辰也 and 太田, 祐樹 and 児島, 清秀}, issue = {1}, journal = {園芸学研究, 園芸学研究}, month = {Jan}, note = {The frequency of second resonance and the elasticity index (a relative value of the shear modulus measured by the vibration response technique) of fruit during ripening in 'Le Lectier' pears were monitored by a new nondestructive measurement device. In addition, the changes in fresh weight, flesh firmness and soluble solid concentration were determined, and the relationship between elasticity index and those characteristics was demonstrated. The elasticity indices in fruits at harvest time ranged from 48 to 65 (×10^6), and those indices decreased during ripening. The decreasing patterns of elasticity indices differed with the type of fruit, and those indices ranged from 18 to 25 (×10^6) when fruits reached the edible ripe stage 40 days after treatment (DAT). Changes in the physical properties of various fruit could be continuously traced by the elasticity index, and it was suggested that the differences in fruit quality at harvest time and softening patterns during ripening were attributed to the dispersion of differences in ripeness at the time when fully ripe (40 DAT). The fresh weight and flesh firmness decreased during ripening, although the soluble solid concentration was increased, and those characteristics correlated with the elasticity index. These findings suggest that the edible ripe stage of 'Le Lectier' pears during ripening can be estimated by the elasticity index, which was affected by both water concentration and soluble solid concentration., セイヨウナシ‘ル・レクチエ’における追熟中の果実の第2共鳴周波数および弾性指標(振動応答技術によって測定された剪断係数の相対値)を新規の非破壊測 定装置でモニターした.さらに,果実重,果肉硬度および可溶性固形物濃度の変化を測定し,弾性指標と果実特性との関係を示した.収穫時の果実の弾性指標は 48~65(×10^6)であり,追熟中に低下した.弾性指標の低下パターンは果実によって異なり,処理後40日に可食状態に達した時の弾性指標は18~25(×10^6)であった.個々の果実おける物性の変化を弾性指標によって連続的に追跡でき,収穫時の果実の品質や追熟中の軟化パターンの違いが完熟時 (処理後40日)における熟度のばらつきの原因になることが示唆された.果実重および果肉硬度は追熟中に低下したが,可溶性固形物濃度は上昇し,これらの 果実特性は弾性指標と相関があった.これらの結果は,追熟中の‘ル・レクチエ’果実の可食期を弾性指標によって推定でき,その弾性指標は含水率と可溶性固 形物濃度の影響を受けることを示唆している.}, pages = {109--114}, title = {追熟中のセイヨウナシ‘ル・レクチエ’における非破壊法による果実特性の評価}, volume = {8}, year = {2009} }