紫外光增强对大葱形态和生理指标的影响

本文以日本大葱为材料，以荧光灯照射为对照，研究了 UV辐射增强对大葱株高、茎粗、含水量、类黄酮、叶绿素、V c、可溶性糖含量等形态和生理指标的影响。 结果表明：UV辐射增强条件下供试大葱株高显著降低，而茎粗无显著变化；类黄酮含量显著升高；而叶绿素 b 含量显著降低；叶绿素a、叶黄素、含水量、V c 、可溶性糖含量无显著变化。

Effects of Enhanced UV- Radiation on Morphological and Physiological Characters of Welsh Onion

In this study, the effects of enhanced UV-B radiation on plant height, stem diameter, water content, contents of flavonoid, chlorophyll, V c and soluble solid of welsh onion(Allium fistulosum L.) were studied.The results showed that under the enhanced UV-B radiation, plant height decreased significantly, while the stem diameter was not significantly affected;the content of chlorophyll b decreased significantly, however the flavonoid content increased significantly compared with the CK.It was also noticeable that contents of chlorophyll a and total chlorophyll, water, V c, and soluble solid were not significantly affected by the enhanced UV radiation.These results would be useful for breeding out new cultivars of welsh onion with high flavonoid content.