Enzymatic reactions taking place in minimally processed vegetables are considered as a major problem, because they adversely affect sensorial and nutritional quality. Polyphenol oxidase (PPO), peroxidase (POD) and lipoxygenase (LOX) from lettuce were purified on a column packed with positively charged diethylaminoethyl (DEAE) cellulose by applying pH gradient elution from pH=4.0 to 9.0. The mai...

polyphenol oxidase (ppo) activity varied in differentiation from hyphae to rhizomorph and croute in a. mellea. in undifferentiated hyphae there was not any ppo activity, while croute showed the highest activity. electrophoresis in the presence of sds allows the detection of intensive enzyme forms of ppo, and can also convert slower migrating enzyme forms to faster ones. some fluorescent compoun...

Cinnamomum tamala is a multipurpose economically important plant. The leaves and bark are used as spice and contributes to the different ‘Ayurvedic’ drug preparation. Due to over-exploitation for spice and medicines, the species is vulnerable in its natural habitat. In the present study, a successful attempt was made for callus mediated plant regeneration of the species from leaf and zygotic em...

The present study evaluated the anti-hyperglycemic activty of the aqueous extracts of Cinnamomum tamala (CTLEt) leaves on blood glucose of albino rats. CTLEt was administered at doses of 125 and 250 mg/kg body weight respectively on streptozotocin induced diabetic rats for 3 weeks. Diabetic rats had much reduced body weight than normal rats. Administration of the extracts at the dose of 250 mg/...

Seed characteristics and in vitro culture of C. tamala embryos were studied. Embryos desiccated below 50% (fresh weight) exhibited poor morphogenetic response in vitro and confirmed the recalcitrant nature of seeds. The immature embryos of various developmental ages (4-16 week after flowering, WAF) were cultured on different strengths of MS medium. Morphogenesis responses were recorded after 10...

Type A glandular trichomes of the wild potato (Solanum berthaultii Hawkes) entrap insects by rapidly polymerizing the trichome contents after breakage by insect contact. Polymerization of trichome exudate appears to be driven by a soluble polyphenol oxidase (PPO). PPO constitutes up to 70% of the protein in individually collected trichomes and reaches a concentration approaching 200 mum in thes...