黄芩对干旱复水的生理生态响应(5)
(College of Chinese Medicinal Materials， Jilin Agricultural University， Changchun 130118， China)
[Abstract] To Study the physiological ecology responses of Scutellaria baicalensis to drought and rewatering of short period， we tested and analyzed photosynthesis and chlorophyll fluorescence parameters of S.baicalensis leaves processed by different ways of water treatment in drought and rewatering period， characteristic indexes of physiology and biochemistry of root SOD， POD， PAL， C4H， etc.and accumulation dynamic change of root baicalin and baicalein.The result showed that along with the worsening drought， Pn， Tr， Gs and Fv/Fm of S.baicalensis declined in different water supply， and Fo increased.The response of SOD and POD′s activity in S.baicalensis root to drought in I and II was earlier than it in III.The response time and increase range of baicalin accumulation existed differences in different water supply， and the indexes regained after rewatering.Therefore， photosynthesis of S.baicalensis changed and it destroyed the antioxidant metabolism balance when soil water content decreased resulting from drought.The synergistic effect of defence mechanism launched by S.baicalensis， SOD， POD， PAL， C4H， baicalin and baicalein reduced active oxygen′s damage to the cell.
[Key words] Scutellaria baicalensis； baicalin； physiological ecology； photosynthesis； chlorophyll fluorescence； the system of protective enzymes
doi：10.4268/cjcmm20132210
[责任编辑 吕冬梅], http://www.100md.com(张永刚 韩梅 姜雪 赵胜楠 杨利民)
[Abstract] To Study the physiological ecology responses of Scutellaria baicalensis to drought and rewatering of short period， we tested and analyzed photosynthesis and chlorophyll fluorescence parameters of S.baicalensis leaves processed by different ways of water treatment in drought and rewatering period， characteristic indexes of physiology and biochemistry of root SOD， POD， PAL， C4H， etc.and accumulation dynamic change of root baicalin and baicalein.The result showed that along with the worsening drought， Pn， Tr， Gs and Fv/Fm of S.baicalensis declined in different water supply， and Fo increased.The response of SOD and POD′s activity in S.baicalensis root to drought in I and II was earlier than it in III.The response time and increase range of baicalin accumulation existed differences in different water supply， and the indexes regained after rewatering.Therefore， photosynthesis of S.baicalensis changed and it destroyed the antioxidant metabolism balance when soil water content decreased resulting from drought.The synergistic effect of defence mechanism launched by S.baicalensis， SOD， POD， PAL， C4H， baicalin and baicalein reduced active oxygen′s damage to the cell.
[Key words] Scutellaria baicalensis； baicalin； physiological ecology； photosynthesis； chlorophyll fluorescence； the system of protective enzymes
doi：10.4268/cjcmm20132210
[责任编辑 吕冬梅], http://www.100md.com(张永刚 韩梅 姜雪 赵胜楠 杨利民)