摘要
采用土培实验,研究了氯胁迫(0,0.1,0.15,0.2 mol.L-1)对大白菜幼苗生长以及光合作用的影响。结果表明,较低浓度氯处理(0.1 mol.L-1)对大白菜幼苗叶绿素含量和光合作用没有明显影响。高氯(0.2 mol.L-1)胁迫处理,显著降低了白菜幼苗鲜重、干物质重、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)和叶绿素总量(Chla+Chlb),提高了胞间CO2(Ci)浓度,说明非气孔限制可能是促进Pn降低的主要原因。
In the green house, pot experiments were conducted to study the effects of chloride stress （0, 0.1, 0.15, 0.2 mol · L^-1） on the growths, photosynthesis and chlorophyll content of the of chinese cabbage seedlings. The results showed that the chloride stress, especially stress at high chloride concentration （0.2 mol·L^-1）, significantly reduced the total fresh weight, dry weight, net photosynthetic rate, stomata conductance, transpiration rate, total chlorophyll amount （chla and b）. But increased the intercellular CO2 concentration. These revealed that non- stomatal constraint was the main reason why the seedlings had decreased Pn under chloride stress.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2008年第2期44-47,共4页
Soil and Fertilizer Sciences in China
关键词
大白菜
氯
叶绿素
光合速率
chinese cabbage
chloride stress
chlorophyll
photosynthesis
