biologia plantarum

Biologia plantarum 9:56, 1967 | DOI: 10.1007/BF02930736

Metabolic disturbances in nicotiana glauca, a symptomless

Marie Ulrychová¹, Jaroslav Limberk¹

¹ Department of Plant Pathology, Institute of Experimental Botany, Czechoslovak Academy of Sciences, Praha 6 - Dejvice

Metabolic disturbances inNicotiana glauca, a symptomless carrier of potato witches' broom were studied. The dry weight content of leaves of diseased plants was slightly decreased, that of the stems increased. The ash content in the dry weight of the whole diseased plant was decreased by 11%. Contrary to tomato plants which had shown considerable disproportions in the distribution of metabolites among the individual organs investigated (ULRYCHOVÁ, LIMBERK 1964), the content of the total nitrogen and of the individual nitrogen fractions of both leaves and stems of diseasedNicotiana glauca were decreased. The content of glutamine was increased in both organs in spite of the decrease of ammonia nitrogen by nearly 30% in both cases. The most striking disturbance found in the diseased plants ofNicotiana glauca was the 67% increase of a low-molecular phosphorus fraction (P extractable with 0-2N HCIO₄) in the leaves. This result agrees with that found in diseased tomato plants and may be primarily associated with the virus infection. The content of all other phosphorus fractions of both leaves and stems was decreased.

Received: February 24, 1966; Published: January 1, 1967  Show citation