Physiology and control of apple scald

Simple item page
dc.contributor.authorKamath, Osler C.en
dc.contributor.committeechairKushad, Mosbah M.en
dc.contributor.committeememberBarden, John A.en
dc.contributor.committeememberOrcutt, David M.en
dc.contributor.departmentHorticultureen
dc.date.accessioned2014-03-14T21:31:10Zen
dc.date.adate2009-03-12en
dc.date.available2014-03-14T21:31:10Zen
dc.date.issued1990-02-05en
dc.date.rdate2009-03-12en
dc.date.sdate2009-03-12en
dc.description.abstractThe effect of controlled atmosphere (CA) storage, and antioxidant treatment on polyphenoloxidase (EC 1. 1418.1:PPO), peroxidase (EC11.11.1.7:POD), and superoxide dismutase (EC 1.15.1.1:S0D) activities and superficial scald and soft scald development in 'Virginiagold','Stayman', and 'Rome' apples (Malus domestica Borkh.) was investigated. 'Virginiagold' apples treated postharvest with an aqueous solution of diphenylamine (DPA) + 1,2, dihydro -6- ethoxy -2,2,4-trimethylquinoline (ethoxyquin) and stored in CA exhibited lower soft scald incidence and higher firmness than comparable fruits stored at O°C in air storage. Fruit firmness and titratable acids (TA) decreased continuously, while ethylene increased in storage. Titratable acids and firmness were positively correlated, while TA and ethylene and firmness and ethylene were negatively correlated. 'Stayman' and 'Rome' apples analyzed during storage showed increase in levels of λ±-famesene and its oxidation products conjugated trienes. During storage fruits showed an increase in the activities of polyphenoloxidase (PPO), peroxidase (POD), and superoxide dismutase (SOD), which reached a maximum when scald symptoms in 'Stayman' were observed. Our results indicate that 'Stayman' apples exhibited scald and 'Rome' did not, because 'Stayman' apples had a ten fold higher PPO activity than 'Rome.'en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 62 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03122009-040821en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03122009-040821/en
dc.identifier.urihttp://hdl.handle.net/10919/41482en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1990.K353.pdfen
dc.relation.isformatofOCLC# 21767067en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.K353en
dc.subject.lcshApple scalden
dc.titlePhysiology and control of apple scalden
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineHorticultureen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V855_1990.K353.pdf
Size:
1.78 MB
Format:
Adobe Portable Document Format
Download

Collections

Masters Theses