中晩生カンキツ'清見','不知火','はるみ','はれやか','せとか'の内部品質と外観に及ぼす貯蔵の影響(収穫後の貯蔵・流通)  [in Japanese] Influence of Storage on Fruit Quality and the Appearance in Recent Medium and Late Ripening Citrus(Postharvest Physiology & Technology)  [in Japanese]

比較的新しい中晩生カンキツ数品種を,乾燥予措を施して,あるいは施さずに,温度5±1℃,相対湿度85±4%RHないし>98%RHの条件で2〜3か月間貯蔵し,内部品質や外観の変化を調査した.また,'清見'を25℃に出庫した時の果皮障害防止法を検討した.各品種とも,貯蔵により,糖度はわずかに上昇した.酸度は,'今村温州','はるみ','せとか','はれやか'では大幅に低下し,'不知火'では若干低下した.'清見'の酸度は低下しなかった.'不知火'と'はれやか'では,乾燥予措を施した場合に,貯蔵中の糖と酸の1果当たり総含量の減少が抑制された.'はるみ'を除く品種において,乾燥予措により果皮障害の発生が助長された.特に,'清見'と'はれやか'では発生率が高かった.貯蔵湿度は内部品質と外観に対して影響を及ぼさなかったが,果実重の減少は高湿度により抑制され,乾燥予措をせずに高湿度で貯蔵した場合には果実重がほとんど減少しなかった.'清見'は,出庫すると果皮障害が多発したが,出庫時に果皮表面に結露した水滴を拭い取ることにより障害が軽減された.

The influence of 2- 3 months storage at 5 ± 1℃ and 85 ± 4% or > 98% relative humidity conditions with or without prestorage conditioning treatment was investigated in recent cultivars of medium and late ripening citrus. The concentration of soluble solids increased slightly during storage. Acidity decreased rapidly in 'Imamura' Satsuma mandarin, 'Harumi', 'Setoka' and 'Hareyaka', while 'Kiyomi' and 'Shiranuhi' showed small changes in acidity. Prestorage conditioning treatment decelerated the rate of decrease in soluble solids and acid in 'Shiranuhi' and 'Hareyaka'. Prestorage conditioning treatment promoted the occurrence of rind disorder in all cultivars except 'Harumi'. Severe rind disorder occurred in 'Kiyomi' and 'Hareyaka'. Though the storage relative humidity did not influence the appearance or internal quality of the fruit, higher humidity decreased fresh weight loss contributing to maintaining the freshness of stored fruit. 'Kiyomi' fruit were stored at 5 ± 1℃ for three months then transferred to ambient conditions (approximately 25℃) to investigate responses to shipping after storage. Rind disorder occurred promptly within one week. However, wiping the moisture off the fruit surfaces when transferring could prevent or delay the occurrence.