Effect of Lanthanum on Plants under Supplementary Ultraviolet-B Radiation: Effect of Lanthanum on Flavonoid Contents in Soybean Seedlings Exposed to Supplementary Ultraviolet-B Radiation  

作　　者：梁滨 黄晓华 张光生 张峰 周青 

机构地区：[1]Key Laboratory of Industrial Biotechnology, Ministry of Education, Southern Yangtze University [2]College of Chemistry and Environmental Science, Nanjing Normal University

出　　处：《Journal of Rare Earths》2006年第5期613-616,共4页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (20471030);the Foundation of State PlanningCommittee (IFZ20051210)

摘　　要：The effect of La on flavonoids, chlorophyll contents, and phenylalanine ammonia-lyase （PAL） activity in soybean seedlings under supplementary ultraviolet-B radiation （UV-B, 280 - 320 nm） was studied. The results show that PAL activity, contents of flavonoids and chlorophyll in the plants pretreated with La （20 mg·L^- 1 ） are higher than those in CK. UV-B radiation could result in an increase in flavonoid content and PAL activity, associated with a decrease in chlorophyll content. However, the increase in the range of PAL activity and flavonoid content in UV-B treatment are lesser than those in the La treatment. The changes of flavonoid contents and PAL activity in La ＋ UV-B treatment are similar to those in UV-B treatment, and the increase in their range is higher than those in UV-B treatment. This shows that La can enhance the resistance of soybean seedling to UV-B radiation and alleviate the damage of UV-B radiation by increasing flavonoid content, chlorophyll content, and PAL activity.The effect of La on flavonoids, chlorophyll contents, and phenylalanine ammonia-lyase （PAL） activity in soybean seedlings under supplementary ultraviolet-B radiation （UV-B, 280 - 320 nm） was studied. The results show that PAL activity, contents of flavonoids and chlorophyll in the plants pretreated with La （20 mg·L^- 1 ） are higher than those in CK. UV-B radiation could result in an increase in flavonoid content and PAL activity, associated with a decrease in chlorophyll content. However, the increase in the range of PAL activity and flavonoid content in UV-B treatment are lesser than those in the La treatment. The changes of flavonoid contents and PAL activity in La ＋ UV-B treatment are similar to those in UV-B treatment, and the increase in their range is higher than those in UV-B treatment. This shows that La can enhance the resistance of soybean seedling to UV-B radiation and alleviate the damage of UV-B radiation by increasing flavonoid content, chlorophyll content, and PAL activity.

关 键 词：LANTHANUM ultraviolet-B radiation soybean seedling flavoniod rare earths 

分 类 号：O614.33[理学—无机化学] X503.231[理学—化学]