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- Title
Nitrogen forms modulate effects of benzothiadiazole and arbutin on cucumber sugar metabolism.
- Authors
Skłodowska, M.; Naliwajski, M.; Wielanek, M.; Gajewska, E.; Kuźniak, E.
- Abstract
The effect of benzothiadiazole (BTH) and arbutin (ARB) on sugar metabolism and plant fitness in cucumber growing hydroponically in media with different doses of NO and urea as nitrogen sources (100 % NO, 75 % NO + 25 % urea, and 50 % NO + 50 % urea) was studied on the 7 and 14 day after the treatment. The glucose, sucrose, and chlorophyll (Chl) content, acid and alkaline invertases and lactate dehydrogenase activities, as well as leaf area of the 3 and 5 leaves were determined. Urea changed the plant sugar metabolism in a dose-, time- and leaf-age-dependent manners and influenced a cucumber response to the BTH and ARB treatments. The BTH caused a significant cessation of growth, a decrease in Chl content, a reduction of leaf area, and an enhancement of lactate dehydrogenase and alkaline invertase activities. In the older leaves of the BTH-treated plants, a high accumulation of glucose and sucrose was found. At the lower dose of urea, the metabolic changes were limited. In the ARB-treated plants, the Chl content remained unchanged in all the nitrogen variants. In these plants, decrease in glucose and sucrose content and in both invertase activities was observed mainly in younger leaves of the plants grown on the high dose of urea. The ARB improved the fitness of the cucumber plants grown in the presence of urea.
- Subjects
CUCUMBERS; PLANT metabolism; THIADIAZOLES; ARBUTIN; GLUCOSE metabolism; PLANT growing media
- Publication
Biologia Plantarum, 2015, Vol 59, Issue 4, p757
- ISSN
0006-3134
- Publication type
Academic Journal
- DOI
10.1007/s10535-015-0552-8