A polygalacturonase (PG) was extracted and purified from decayed tissue of 'Anjou' pear fruit inoculated with Penicillium expansum. Ammonium sulfate precipitation, gel filtration, and cation exchange chromatography were used to purify the enzyme. Both chromatographic methods revealed a single peak corresponding to PG activity. PG enzyme activity from healthy and wounded pear tissue was undetect...

The biocontrol activity of Aureobasidium pullulans on decay of apple fruit caused by Botrytis cinerea and Penicillium expansum, and its ability to induce biochemical defense responses in apple tissue, were investigated. In apple wounds, A. pullulans multiplied rapidly and controlled decay caused by either B. cinerea or P. expansum. At the end of the storage period, A. pullulans reduced the inci...

Standard colour measurements can pose a serious problem for interpretation. For tomatoes the maturity at harvest does affect the colour that can maximally be obtained during postharvest storage. For more mature fruit up to 2 units (compared to 18 units tops) were found. This effect was ascribed to the level of a precursor produced during growth. More mature fruit also exhibit a more pronounced ...

Quantitative microbial risk assessment models for estimating the annual risk of enteric virus infection associated with consuming raw vegetables that have been overhead irrigated with nondisinfected secondary treated reclaimed water were constructed. We ran models for several different scenarios of crop type, viral concentration in effluent, and time since last irrigation event. The mean annual...

Carrot is one of the most important horticultural crops, with an annual worldwide production exceeding 40 million tonnes. Carrots are sold either fresh intact or fresh-cut as minimally processed vegetables (MPV). In postharvest supply chain, physiological disorders, fungal decay, and their combinations reduce quality MPV carrots. carrots more susceptible to changes than due a higher loss protec...

PART I: POSTHARVEST BIOACTIVE, ANTIOXIDANT AND BINDING PROPERTIES MARTIN POLOVKA, YONG SEO PARK, KYUNG-SIK HAM, YANG-KYUN PARK, SUCHADA VEARASILP, PAWEL PASKO, FERNANDO TOLEDO, PATRICIA ARANCIBIA-AVILA and SHELA GORINSTEIN Department of Chemistry and Food Analysis, National Agricultural and Food Centre VUP, Food Research Institute, Bratislava, SK-824 75, Slovak Republic Department of Horticultu...

Balsam fir (Abies balsamea) trees are commonly used as a specialty horticultural species for Christmas trees and associated greenery in eastern Canada and United States. Postharvest needle abscission has always been a problem, but is becoming an even bigger challenge in recent years presumably due to increased autumn temperatures and earlier harvesting practices. An increased understanding of p...

Considering their economic importance, there has been relatively little research published on postharvest handling of cut lilies. Complicating this is the diversity of cultivar groups--asiatics, orientals, LA hybrids, OT hybrids, longiflorum and others. And, the diversity within each group is large and constantly growing as new cultivars are released. Cultivation practices and production locati...

Postharvest quality in stone fruits is ultimately defined in terms of consumer satisfaction, and includes appearance, texture and flavor, and nutritional value and safety. These result from all decisions and practices beginning with site and cultivar selection, and extending through cultural practices and all stages of postharvest handling. The development of high quality fruit is influenced by...

Anthracnose of papaya fruit caused by the fungus Colletotrichum gloeosporioides is one of the most economically important postharvest diseases. Hot water immersion (HW) and calcium chloride (Ca) treatments have been used to control papaya postharvest diseases; however, the effect of the combination HW-Ca on the pathogen growth and the development of the disease in infected papaya fruit has been...