摘要
采用盆栽实验,分析了单一UV-B辐射增强或1,2,4-三氯苯(TCB)污染土壤与两种胁迫复合作用对青菜生长发育、气孔阻力及叶片结构的影响.结果表明,单一1,2,4-TCB污染对青菜生长发育的抑制作用大于两种胁迫复合作用.UV-B辐射增强和1,2,4-TCB污染均显著增加青菜叶片正面和反面气孔阻力.UV-B辐射增强使青菜叶片产生白化现象.1,2,4-TCB污染使叶片颜色变淡,并使青菜叶片表面出现黑斑症状,且UV-B辐射增强使黑斑症状加剧.总之,单一增强UV-B辐射或1,2,4-TCB污染及其复合作用对青菜各生长发育指标的影响结果不同.
A pot experiment was conducted to study the effects of UV-B radiation enhancement alone, 1,2,4-trichlorobenzene （TCB） contamination soil alone, and the combined stress on the growing process, stomatal resistance and leaf structure of green vegetable. The results showed that 1,2,4-TCB contamination alone had more significant inhibitory effect on the growth of green vegetable than the combined stress. Both UV-B radiation enhancement and 1,2,4-TCB contamination reduced the stomatal resistance of front and reverse leaves. Enhanced UV-B radiation resulted in the albino of leaves. 1,2,4-TCB contamination resulted in the fading of leaf color and the appearing of black spots on leaf surfaces, and the enhanced UV-B radiation strengthened the black-spot symptom. In conclusion, the effects of UV-B radiation enhancement alone, 1,2,4-trichlorobenzene （TCB） contamination soil alone and the combined stress on the growth indicators of green vegetable were different.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2014年第3期1164-1168,共5页
Environmental Science
基金
国家自然科学基金项目(41201314,41001134)
土壤与农业可持续发展国家重点实验室开放课题项目(0812201227)
关键词
UV-B辐射
1
2
4-三氯苯
复合作用
青菜
生长
UV-B radiation
1,2,4-trichlorobenzene
combined effect
green vegetable
growth
