摘要
镉(Cd)污染、紫外(UV-B)辐射增强及2者复合胁迫对大豆(Glycine max)生长及根、叶片中果胶酶(PG)和纤维素酶(Cx)活性影响的研究表明,Cd、UV-B单独还是复合胁迫对大豆株高及地上部干、鲜重都有明显的抑制作用;UV-B胁迫明显抑制根的伸长生长,复合胁迫对大豆根生长略有促进作用,但降低地下部干鲜重。Cd连续处理6d明显抑制叶片中PG和Cx活性,UV-B及复合处理6 d降低叶片中Cx活性;复合处理3 d根系中PG和Cx活性呈现增高趋势,但UV-B和Cd单独处理未引起酶活性的显著改变。结果表明Cd、UV-B辐射增强及复合胁迫对细胞壁酶活性的影响与植物生长密切相关。
It investigates the changes in activities of pectin polygalacturonase（PG） and Cellulase（Cx） of soybean exposed to Cd,enhanced UV-B radiation and combination of Cd and UV-B radiation（FH）.The results showed that different treatments（Cd,UV-B and FH） inhibited seeding hight,dry and fresh weight;UV-B radiation could decrease elongation of root;FH stress slightly increased elongation of root but decreased dry and fresh weight of roots.The activites of PG and Cx in leaves were inhibited after exposed to Cd for 6 d,and the actity of Cx in leaves was inhibited after exposed to UV-B and FH for 6 d;FH stress（3 d） promoted activites of PG and Cx in roots while Cd or UV-B alone did not change activities of PG and Cx.The results also indicated that Cd,enhanced UV-B radiation and combination of Cd and UV-B could alter cell wall degrading enzymes activities,in turn alter plant growth.
出处
《沈阳师范大学学报（自然科学版）》
CAS
2010年第2期255-258,共4页
Journal of Shenyang Normal University:Natural Science Edition
基金
国家自然科学基金资助项目(30870205)
沈阳师范大学实验中心主任基金
沈阳师范大学大学生科研项目
关键词
大豆
紫外线-B
镉
果胶酶
纤维素酶
soybean（glycine max）
ultraviolet-B（UV-B）
Cadmium（Cd）
Pectin polygalacturonase（PG）
Cellulase（Cx）
