The accumulation and incorporation of externally applied P(32) into ATP and the effect of 4,6-dinitro-o-sec-butylphenol (DNBP) on these processes was studied, using tomato (Lycopersicon esculentum Mill.) leaf disks.P(32) was, in most part, actively accumulated into leaf disks with time and was incorporated into ATP and other organic phosphates. DNBP inhibited both P(32) accumulation and ATP gen...

The transition from reversible to permanent wilting, in whole tomato seedlings (Lycopersicon esculentum Mill. cv. M82) following severe salt-stress by root exposure to 300 mM NaCl, was investigated. Salinized seedlings wilted rapidly but recovered if returned to non-saline nutrient solution within 6 h. However, after 9 h of salt-treatment 100% of the seedlings remained wilted and died. Remarkab...

There are various aspects that must be considered when drying small fruits, whether for the food or nutraceutical and functional food industries. Fruits with a waxy skin, such as blueberries (Vaccinium myrtillus L.), cranberries (Vaccinium macrocarpon Ait.), and cherry tomatoes (Lycopersicon esculentum Mill.) are the focus of this discussion. These fruits have each been implicated to offer heal...

Proteinase inhibitors were extracted from the upper leaves of tomato plants, Lycopersicon esculentum Mill., 48 hours after wounding single lower leaves. Inhibitors were partially purified by affinity chromatography and isoelectric focusing. Significantly higher levels of trypsin and chymotrypsin inhibitory activity were recovered from wounded plants than from unwounded controls. Several inhibit...

Early plant defense response is characterized by elevation of activity of peroxidases and enhanced insolubilization of hydroxyproline-rich glycoproteins, such as extensin, in the cell wall. The insolubilization process (cross-linking between soluble extensin precursor molecules) is catalyzed by extensin peroxidases. We have ionically eluted extensin peroxidases from intact water-washed suspensi...

Arabidopsis thaliana grown in soil from field plots amended with composted forms of paper mill residuals (PMR) exhibited reduced symptoms of bacterial speck caused by Pseudomonas syringae pv. tomato (Pst) compared with plants grown in soil from field plots amended with a non-composted PMR or non-amended soils. Similar results were obtained with tomato (Lycopersicon esculentum Mill.). No relatio...

A bstract. Mitochondria from tomato fruit (Lycopes sicon esculentum Mill.) exhibited a respiratory control ratio of 2.5 and an ADP:O ratio of 1.3 for succinate oxidati-on for 24 hours after isolation. They also showed a delay in response to the first addition of ADP. The addition of ATP and ADP before succinate eliminated the delayed response as did chelation of endogenous cations with ethylene...

A 23-kD pathogenesis-related protein (P23) is induced in tomato (Lycopersicon esculentum Mill, cv Rutgers) plants when infected with citrus exocortis viroid. This protein is homologous to the salt-induced tomato NP24 protein (I. Rodrigo, P. Vera, R. Frank, V. Conejero [1991] Plant Mol Biol 16: 931-934). Further characterization of P23 has shown that this protein accumulates in vacuoles in assoc...

Buckwheat genus (Fagopyrum Mill.) is one of the aluminium tolerant taxonomic units of plants. The aim of the study was an evaluation of the aluminium (50 μM effect on phenolic accumulation in various parts of buckwheat plants (Fagopyrum esculentum Moench). Detection of increasing of total phenolic content, changes in flavonoid and anthocyanin content and phenylalanine ammonia-lyase activity (PA...