Differences of biochemical components between the skin tissues of normal and black-speckled 'd'Anjou' pears after prolonged low-oxygen storage

A proportion of 'd'Anjou' pear fruit (Pyrus communis L.) developed a disorder, "black speck" or "skin speckling", after prolonged controlled atmosphere (CA) storage (1% O2, -0.5C). A comparative study of biochemical components revealed that there was no significant...

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Bibliographic Details
Published inJournal of the American Society for Horticultural Science Vol. 115; no. 5; pp. 784 - 788
Main Authors Lee, S.P. (Oregon State Univ., Corvallis, OR), Chen, P.M, Chen, T.H.H, Varga, D.M, Mielke, E.A
Format Journal Article
LanguageEnglish
Published Alexandria, VA American Society for Horticultural Science 01.09.1990
Subjects
ACIDE ORGANIQUE
ACIDOS ORGANICOS
ACTIVIDAD ENZIMATICA
ACTIVITE ENZYMATIQUE
Agronomy. Soil science and plant productions
ALMACENAMIENTO EN ATMOSF CONTROL
ANALISIS QUIMICO
ANALYSE CHIMIQUE
Biological and medical sciences
COMPOSICION
COMPOSITION
FRUIT
FRUTO
Fundamental and applied biological sciences. Psychology
PERA
Physiological diseases. Varia
Phytopathology. Animal pests. Plant and forest protection
POIRE
PROTEINAS
PROTEINE
STOCKAGE EN ATMOSPHERE CONTROLEE
TRASTORNOS FUNCIONALES
TROUBLE FONCTIONNEL
VARIEDADES
VARIETE
Controlled atmosphere storage
Proteins
Pyrus communis
Storage
Fruit crop
Dicotyledones
Angiospermae
Rosaceae
Spermatophyta
Fruit tree
Organic acids
Physiological disorder
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Summary:A proportion of 'd'Anjou' pear fruit (Pyrus communis L.) developed a disorder, "black speck" or "skin speckling", after prolonged controlled atmosphere (CA) storage (1% O2, -0.5C). A comparative study of biochemical components revealed that there was no significant difference in succinic, citric, fumaric, and pyruvic acids between the speckled and normal skin tissues. The content of malic acid in the affected tissue was almost three times lower than that in the normal tissue. The specific activity of NADP-malic enzyme (EC 1.1.1.40) in the affected tissue was also lower, but the total activities were similar. The affected tissue contained higher percentages of dry matter and soluble proteins than the normal tissue. Two-dimensional gel electrophoresis of proteins showed that two groups of novel polypeptides appeared only in the affected skin tissue. This study indicated that a certain proportion of 'd'Anjou' pear fruit might have been exposed to unfavorable preharvest environmental stresses, and, therefore, could no longer tolerate the subsequent semi-anaerobic and chilling stresses during prolonged CA storage
Bibliography:9049028
J11
ISSN:0003-1062
2327-9788
DOI:10.21273/JASHS.115.5.784