Folia Horticulturae

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The effect of solar radiation on beta-carotene and other carotenoid content in carrot roots

Włodzimierz Krzesiński, Mikołaj Knaflewski

Department of Vegetable Crops
Agricultural University of Poznań
D±browskiego 159, 60-594 Poznań, Poland
e-mail: brassica@au.poznan.pl, miknaf@au.poznan.pl

The three following cultivars of carrot - ‘Napoli F1’, ‘Fantazja’, ‘Kazan F1’ - were grown in the years 1998-2000. The seeds were sown in ridges from the end of April until the beginning of June. Throughout the growth period the total solar radiation was recorded by an automatic system. Every 2 weeks, the leaf area index and the amount of absorbed photosynthetically active radiation (PAR) were calculated. Correlation was found between solar radiation and beta-carotene as well as other carotenoid content in carrot roots. It was found that beta-carotene content depended mainly on the amount of absorbed photosynthetically active radiation by single carrot plants, and not by area unit. Differences in beta-carotene content in carrot cultivars were caused by the time of root formation, rate of beta-carotene production, and total absorbed PAR (PARa).

Krzesiński W., Knaflewski M., 2002. The effect of solar radiation on beta-carotene and other carotenoid content in carrot roots. Folia Horticulturae 14/2: 25-33.