Effects of ultraviolet-B irradiation on the cuticular wax of cucumber (Cucumis sativus) cotyledons
- 23 January 2008
- journal article
- research article
- Published by Springer Science and Business Media LLC in Journal of Plant Research
- Vol. 121 (2), 179-189
- https://doi.org/10.1007/s10265-007-0143-7
Abstract
Cucumber seedlings were grown under three doses of supplemental ultraviolet-B (UV-B) irradiation to examine the effects on the surface structure of the cotyledons. Medium and high doses of irradiation induced glazing (formation of translucent, glossy layers) on the adaxial surfaces of cotyledons, especially those exposed to a high dose of UV-B. Observation with a scanning electron microscope revealed that the adaxial surfaces of cotyledons exposed to a medium dose of UV-B and controls became rough in appearance, but unevenness of the surface was not apparent in cotyledons irradiated with a high dose of UV-B. UV-B irradiation affected the types and amounts of alkanes and primary alcohols, the main components of cucumber cuticular wax. Based on cotyledon area, the amounts of these components were significantly higher in cotyledons irradiated with a medium dose of UV-B than in controls. This effect could be a consequence of small cotyledon area and constant wax production in the cotyledons irradiated with a medium dose of UV-B. The distribution patterns of homologs within the alkane and primary alcohol fractions shifted during growth to longer alkyl chain length in the control cotyledons. UV-B irradiation repressed these changes, suggesting that UV-B acts on cuticular wax biosynthetic pathways.Keywords
This publication has 27 references indexed in Scilit:
- Induction and inhibition of cyclobutane pyrimidine dimer photolyase in etiolated cucumber (Cucumis sativus) cotyledons after ultraviolet irradiation depends on wavelengthJournal of Plant Research, 2007
- Growth and physiological responses of canola (Brassica napus) to UV‐B and CO2 under controlled environment conditionsPhysiologia Plantarum, 2005
- Chemical Composition of thePrunus laurocerasusLeaf Surface. Dynamic Changes of the Epicuticular Wax Film during Leaf DevelopmentPlant Physiology, 2001
- Higher plants and UV-B radiation: balancing damage, repair and acclimationTrends in Plant Science, 1998
- Responses to ultraviolet‐B radiation (280–315 nm) of pea (Pisum sativum) lines differing in leaf surface waxPhysiologia Plantarum, 1996
- Leaf surface compound fromBrassica oleracea (Cruciferae) induces oviposition byPieris brassicae (Lepidoptera: Pieridae)Chemoecology, 1992
- The role of the abaxial leaf surface waxes of Lolium spp. in resistance to Erysiphe graminisPlant Pathology, 1990
- Effect of UV‐B (290–320 nm) irradiation on growth and metabolism of cucumber cotyledonsPhysiologia Plantarum, 1989
- The Changes With Age in the Epicuticular Wax of Sorghum bicolorJournal of Natural Products, 1982
- Dependence of the hydrocarbon constituents of the leaf waxes of Khaya species on leaf agePhytochemistry, 1980