摘要
以凤仙花苗为材料,测定了不同强度UV-B处理(0,0.05,0.10,0.15,0.20 W/m2)对其叶片光合参数、可溶性总糖、脯氨酸、抗氧化酶(SOD,POD,CAT)活性、MDA、可溶性蛋白质以及总黄酮质量分数的影响,结果表明:随着外加UV-B辐射强度增加,胞间二氧化碳浓度(Ci)、可溶性总糖、脯氨酸、SOD,MDA,总黄酮质量分数随之增加,而净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、POD活性、CAT活性和可溶性蛋白质质量分数则随之下降,说明增强UV-B辐射对凤仙花造成了明显伤害,但同时提高了植物总黄酮质量分数.
The Impatiens balsamina seedlings have been used as material in this paper.Under different intensity of UV-B radiation（0,0.05,0.10,0.15,0.20W/m2）,the following parameters have been assayed： photosynthetic parameter,total soluble sugar,proline,antioxidase（SOD,POD,CAT）activity,MDA,soluble protein and total flavoids.The results indicate that intercellular co2 concentration（Ci）,total soluble sugar,proline,SOD,MDA and total flavoids have increased with the intensified UV-B radiation,while net photosynthetic rate（Pn）,stomatal conductance（Gs）,transpiration rate（Tr）,POD,CAT and soluble protein decreased.At the UV-B radiation dose of 0.05 W/m2,POD and CAT are significantly higher than those of control group.Therefore,intensified UV-B radiation has significantly impaired the Impatiens balsamina seedlings,decreasing the photosynthetic rate of the leaves while increasing the total falvoids in the plants.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第8期41-45,共5页
Journal of Southwest China Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(30500041)
重庆市科技攻关资助项目(cstc2012gg-yyjs80013)
三峡库区生态环境与生物资源省部共建国家重点实验室基金资助项目(SKL2012-01)
关键词
增强UV-B
凤仙花
光合速率
抗氧化酶
总黄酮
UV-B radiation
Impatiens balsamina
photosynthetic rate
antioxidase
total flavoids
