目的利用电子鼻技术监测贮藏、运输过程中香红梨(Pyrus communis L. cv. Xianghong)的腐烂情况,确定腐烂果的特征传感器。方法利用电子鼻技术对按腐烂点直径划分的3个等级香红梨的挥发性气体进行测定,同时比较贮藏初期和后期果实挥发性...目的利用电子鼻技术监测贮藏、运输过程中香红梨(Pyrus communis L. cv. Xianghong)的腐烂情况,确定腐烂果的特征传感器。方法利用电子鼻技术对按腐烂点直径划分的3个等级香红梨的挥发性气体进行测定,同时比较贮藏初期和后期果实挥发性气体的差异。采用主成分分析(principal components analysis, PCA)、线性判别分析(lineardiscriminantanalysis,LDA)和载荷分析(loadinganalysis,LA)对电子鼻响应信号值进行分析。结果电子鼻传感器W5S、W1S、W1W、W2S、W2W是检测香红梨挥发性气体的特征传感器。贮藏期间,氮氧化合物、甲烷、硫化物和萜烯类、醇类和部分芳香族化合物释放量逐渐增加。果实腐烂使硫化物和萜烯类(W1W)、甲烷(W1S)、氮氧化合物(W5S)挥发性物质进一步积累释放,传感器响应值比贮藏初期(P)分别提高了7.7、4.6、4.5倍。通过监测W5S传感器响应值变化可判断果实的腐烂情况。LDA分析对不同贮藏时期和不同腐烂程度香红梨的区分能力更好。结论电子鼻传感器W5S、W1S、W1W、W2S、W2W可灵敏反应香红梨的挥发性气体,其中W5S、W1S、W1W为果实腐烂特征性传感器,其响应值可区分果实腐烂程度。研究结果可为果实采后贮藏保鲜的无损检测技术及果实品质评价提供理论参考。展开更多
＇Xianghongli＇ is a mid-ripening pear with red appearance. The seeding was selected from seeds of Red D＇Anjou radiated by γ-Co^60. The cultivar is a tall tree, with a height of 3.31 m at 6 years old. The tree is vi...＇Xianghongli＇ is a mid-ripening pear with red appearance. The seeding was selected from seeds of Red D＇Anjou radiated by γ-Co^60. The cultivar is a tall tree, with a height of 3.31 m at 6 years old. The tree is vigorous with ramose crown and upright tree gesture. Leaves are elliptic, acuminate, with average 5.802 cm length and 3.389 cm width. Flowers are pale pink. The relative position of petals is overlap. The petal shape is oval with more pollen. The average single fruit weight is 216.0 g, with mainly wide-necked pear formed. The ground color of peel is yellow with 80% bright red of cover color. The flesh is white, melting, soft and juicy, sour-sweet, strongly fragrant, little stone cell and small core. The soluble solid content is 12.5%. The soluble sugar content is 10.78%. The titratable acid content is 0.097%. The fruit quality is excellent. The fruit development period is 125-130 d and the ripe stage is at the end of August in Changli area, Hebei province, It is easy to form flower on short branches, and possesses large number of flower buds. The properties of early-bearing and high yielding are better. It is resistant to fruit phellem, pear scab, cold, etc. The shelf life of fruit is over 20 d. The fruit can be stored for 5 months in refrigeration condition. Suitable cultivation area is Qinhuang- dao,Tangshan, Cangzhou in Hebei, Beijing, Taiyuan in Shanxi and similar area. Xi- anghongli has the high-yield potential and can be extended to the most area of Northern China.展开更多
文摘目的利用电子鼻技术监测贮藏、运输过程中香红梨(Pyrus communis L. cv. Xianghong)的腐烂情况,确定腐烂果的特征传感器。方法利用电子鼻技术对按腐烂点直径划分的3个等级香红梨的挥发性气体进行测定,同时比较贮藏初期和后期果实挥发性气体的差异。采用主成分分析(principal components analysis, PCA)、线性判别分析(lineardiscriminantanalysis,LDA)和载荷分析(loadinganalysis,LA)对电子鼻响应信号值进行分析。结果电子鼻传感器W5S、W1S、W1W、W2S、W2W是检测香红梨挥发性气体的特征传感器。贮藏期间,氮氧化合物、甲烷、硫化物和萜烯类、醇类和部分芳香族化合物释放量逐渐增加。果实腐烂使硫化物和萜烯类(W1W)、甲烷(W1S)、氮氧化合物(W5S)挥发性物质进一步积累释放,传感器响应值比贮藏初期(P)分别提高了7.7、4.6、4.5倍。通过监测W5S传感器响应值变化可判断果实的腐烂情况。LDA分析对不同贮藏时期和不同腐烂程度香红梨的区分能力更好。结论电子鼻传感器W5S、W1S、W1W、W2S、W2W可灵敏反应香红梨的挥发性气体,其中W5S、W1S、W1W为果实腐烂特征性传感器,其响应值可区分果实腐烂程度。研究结果可为果实采后贮藏保鲜的无损检测技术及果实品质评价提供理论参考。
基金Supported by Changli Comprehensive Station of National Pear Industry Technology System(CARS-29-23)Innovation of Scab-resistant,Strongly-fragrant and Storageresistant Pear Germplasm(16226312D-3)~~
文摘＇Xianghongli＇ is a mid-ripening pear with red appearance. The seeding was selected from seeds of Red D＇Anjou radiated by γ-Co^60. The cultivar is a tall tree, with a height of 3.31 m at 6 years old. The tree is vigorous with ramose crown and upright tree gesture. Leaves are elliptic, acuminate, with average 5.802 cm length and 3.389 cm width. Flowers are pale pink. The relative position of petals is overlap. The petal shape is oval with more pollen. The average single fruit weight is 216.0 g, with mainly wide-necked pear formed. The ground color of peel is yellow with 80% bright red of cover color. The flesh is white, melting, soft and juicy, sour-sweet, strongly fragrant, little stone cell and small core. The soluble solid content is 12.5%. The soluble sugar content is 10.78%. The titratable acid content is 0.097%. The fruit quality is excellent. The fruit development period is 125-130 d and the ripe stage is at the end of August in Changli area, Hebei province, It is easy to form flower on short branches, and possesses large number of flower buds. The properties of early-bearing and high yielding are better. It is resistant to fruit phellem, pear scab, cold, etc. The shelf life of fruit is over 20 d. The fruit can be stored for 5 months in refrigeration condition. Suitable cultivation area is Qinhuang- dao,Tangshan, Cangzhou in Hebei, Beijing, Taiyuan in Shanxi and similar area. Xi- anghongli has the high-yield potential and can be extended to the most area of Northern China.
