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GrainGenes Reference Report: EEB-44-95

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Reference	EEB-44-95
Title	Intraspecific differences in physiological response of 20 wheat cultivars to enhanced ultraviolet-B radiation under field conditions
Journal	Environmental and Experimental Botany
Year	2000
Volume	44
Pages	95-103
Author	Yuan L [ Show all 6 ]
Abstract	Summary: Field studies were conducted to determine the potential for alterations in physiology and the intraspecific variation in sensitivity of 20 wheat (Triticum aestivum) cultivars to enhanced ultraviolet-B (UV-B, 280-315 nm) radiation. The supplemental UV-B radiation was 5 kJ m(-2), simulating a depletion of 20% stratospheric ozone. Out of 20 wheat cultivars (from South China, North China and Mexico) tested, 13 showed significant changes in total chlorophyll content. In most of these sensitive species, chlorophyll a content was strongly reduced, and chlorophyll b content decreased in a lesser extent, leading to a decrease in chlorophyll a/b ratio. However, some species had an increased chlorophyll a/b ratio under enhanced UV-B. The effect of UV-B on flavonoid content also showed intraspecific differences, a significant increase for one cultivar, decreases in 12 cultivars and no effect on the other seven cultivars. Superoxide dismutase (SOD) activity of five cultivars was significantly increased, and that of six cultivars significantly decreased. Membrane permeability of 12 cultivars significantly increased, while only that of Dali 905 was significantly decreased. Malonaldehyde (MDA) contents of eight cultivars were increased significantly, while that of three cultivars was significantly decreased. Although large intraspecific differences were found for the different parameters measured, there was no clear correlation between them under UV-B radiation
External Databases	Pubmed: 10996362
Keyword	[ Hide all but 1 of 33 ] arabidopsis flavonoid mutants cell membranes china chlorophyll chlorophyll a/b ratio enzyme activity field field experimentation flavonoid flavonoids genetic variation growth intraspecific variation malonaldehyde membrane membrane permeability mexico ozone permeability physiology plant composition radiation ratios sensitivity spring wheat superoxide dismutase triticum triticum aestivum ultraviolet radiation uv-b radiation wheat cultivar yield yunnan

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