Search

Your search keyword '"Radzevičius, Audrius"' showing total 2 results
2 results on '"Radzevičius, Audrius"'

1. Quality and physiological parameters of tomato (Lycopersicon esculentum Mill.) fruits of Lithuanian selection.

Author

Radzevičius, Audrius, Viškelis, Pranas, and Bobinas, Česlovas

Subjects
*QUALITY, *TOMATOES, *LYCOPENE, *FRUIT ripening, *CAROTENOIDS
Abstract

Six Lithuanian selection lines (137, 998/1000, 194/463, 21/1154, 1428, 1429) of edible tomato (Lycopersicon esculentum Mill.) were investigated in 2006-2007. Fruit quality and physiological parameters were evaluated: the content of lycopene and β-carotene and colour indexes (L*, a*, b* and hue angle h0) at four different stages of fruit ripening (stage I - green, stage II - beginning of ripening, III - not fully ripened, IV - fully ripened), the average fruit number on plant and the average fruit weight. The colour index a* showed the most obvious change, there was a sharp increase between stage I and other ripening levels with a* changing from negative (green color) to positive (red color) values. This could be related with the start of lycopene and β-carotene synthesis. When these carotenoids started to be synthesized, the L* value went down, indicating the darkening of tomato red colour, but in the selection line 1428 fruit colour from stage III to stage IV became lighter. The colour index b* values reached their peak at stage II when tomatoes started to get the red colour. In all the fruit ripening process, the hue angle had a tendency to decline, particularly the h0 value decreased between ripening stages I and II. [ABSTRACT FROM AUTHOR]

Published
2008
Full Text
View/download PDF

2. Sėjos laiko įtaka pomidorų veislės 'Tamina' derliui ir jo kokybei.

Author

Radzevičius, Audrius, Viškelis, Pranas, Viškelis, Jonas, Rubinskienė, Marina, Karklelienė, Rasa, Maročkienė, Nijolė, and Juškevičienė, Danguolė

Subjects
*TOMATO varieties, *SOWING, *FOOD quality, *TOMATOES, *SEEDLINGS, *HORTICULTURE, *POLYETHYLENE, *NEAR infrared spectroscopy
Abstract

Investigation was carried out at the LRCAF Institute of Horticulture in 2012. The aim of this experiment was to evaluate delayed sowing time influence on tomato yield and quality. The object of investigation was tomato variety -- 'Tamina'. It's a medium early, indeterminate type variety, growing up till 2 meters in height with mid-sized (75 g) fruits. Tomato seeds were sown at four different times (29-03-2012; 05-04-2012; 04-12-2012 and 19-04-2012) in heated greenhouse. On the 5th of June tomato seedlings were planted in natural soil in polyethylene non-heated greenhouse as a second culture. The experiment was conducted in three replications. Harvesting field area was 2.1 m². Dry matter and soluble solids content of tomato fruit were determined at the LRCAF Institute of Horticulture in Biochemistry and Technology Laboratory, applying non-destructive Near Infrared Spectroscopy (NIR). The results showed that the earliest sown tomatoes had the earliest yield, but time between germination and the first yield was 3 days longer in comparison with latest sowing tomatoes. Tomatoes sown on the 29th of March and on the 5th of April stood out with the highest total and marketable yields. Tomato sowing time delay gradually increased the amount of non-marketable yield and non-marketable amount of fruits. The earliest sown tomatoes had the largest fruits and sowing delay had negative effect on fruit size. Sowing time also influenced the amounts of dry soluble solids and soluble solids content in tomato fruits. [ABSTRACT FROM AUTHOR]

Published
2012

Catalog

Books, media, physical & digital resources
See catalog results