摘要
在4.52kJ·m-2·d-1UV-BBE的UV-B辐射和700μmol·mol-1的CO2浓度人工模拟复合处理下,研究了对蚕豆(ViciafabaL.)幼苗的生长和光合作用的影响。结果表明,UV-B辐射单因子明显降低蚕豆幼苗的株高、叶面积和生物量,CO2单因子的作用正好相反,二者的作用程度随着处理时间的延长而增大。UV-B辐射和CO2复合作用对蚕豆幼苗的生长影响不明显。同时,增强的UV-B辐射单因子还使蚕豆幼苗的光合速率、气孔导度和水分利用率下降,CO2单因子的作用也相反,且CO2单因子的促进程度大于UV-B辐射单因子的抑制程度。而在UV-B辐射和CO2复合作用下,蚕豆幼苗的光合作用参数基本与对照同步。分析认为,UV-B辐射和CO2复合作用对蚕豆幼苗的影响是一种拮抗作用。
Broad bean (Vicia faba L.) seedlings were investigated on their growth and photosynthesis responses to simulating 4.52 kJ·m-2·d-1UVBBE of ultravioletB(UVB,280~320 nm) and 700 μmol·mol-1 CO2 concentration.The results showed that enhanced UVB radiation significantly decreased the plant height,leaf area and total biomass.Increasing CO2 concentration was opposite to that.The action of UVB/CO2 on plants grew with the treatment time.The combined effect of enhanced UVB and high CO2 on the growth of broad bean seedling was far less.On the other hand,enhanced UVB radiation also decreased the photosynthetic rate,stomata conductance and water use efficiency of plants.High CO2 turned out contrary to them.The promotion of CO2 on the plants was bigger than the inhibition of UVB on that.And the photosynthetic parameters of the plants growing under enhanced UVB and high CO2 were the same with the control for the most part.The present work shows that the combined effect of enhanced UVB and high CO2 on broad bean seedling is a kind of match action.
出处
《西北植物学报》
CAS
CSCD
2003年第1期6-10,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金项目(39970126)
陕西省科技厅产业化培育项目(01ZC07)
