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Formaldehyde is a kind of preservative that has carcinogenic effect on people. It is widely used in the interior decorative materials. And the indoor living environment is often polluted due to the over standard of formaldehyde content in the air. There are many plants having the ability of removal of formaldehyde can purify interior air. In this thesis, the ability of3indoor ornamental species, Dichroa feberifuga, Macropanax rosthornii and Chamaedorea elegans, in eliminating formaldehyde pollutant and resisting formaldehyde stress were evaluated by using formaldehyde gas capsule fumigation method. Main results are as follows:(1)The average formaldehyde absorption rate of Dichroa feberifuga was82%, Macropanax rosthornii60%and Chamaedorea elegans85%. For the ability of formaldehyde purification of the3plants, Chamaedorea elegansm was strongest, the second one was Macropanax rosthornii, and the last one was Dichroa feberifuga.(2) Compared to control, when the fonnaldehyde concentration reached the maximum value288mg·m-3, the relative permeability of membrane of Dichroa feberifuga leaves was increased by64%, MDA increased by178%, SOD activity and POD activity decreased by26%and55%respectively. In the same situation, the relative permeability of membrane of Macropanax rosthornii leaves was increased by10%, MDA increased by19%, SOD activity and POD activity decreased by24%and25%respectively, and the relative permeability of membrane of Chamaedorea elegansm leaves was increased by9%, MDA increased by24%, SOD activity and POD activity increased by41%and36%respectively.(3)Compared to control, when the formaldehyde concentration reached a maximum value288mg·m-3, the chlorophyll content of Dichroa feberifuga leaves was decreased by51%, net photosynthesis decreased by0.76μmol CO2·m-2·s-1, water use efficiency decreased by0.52mmol·mol-1, stomatal conductance decreased by27%, intercellular CO2concentration increased by106%, transpiration decreased by24%, original fluorescence increased by15%, maximum fluorescence decreased by37%, maximal photochemical efficiency and potential activity of PS II photochemistry decreased34%and64%respectively. In the same situation, the chlorophyll content of Macropanax rosthornii leaves was decreased by43%, net photosynthesis decreased2.51μmolCO2·m-2·s-1, water use efficiency decreased by 3.99mmol·mol-1, stomatal conductance decreased88%, intercellular CO2concentration increased by55%, transpiration decreased by82%,original fluorescence increased by13%, maximum fluorescence decreased by5%, maximal photochemical efficiency and potencial activity of PSⅡ photochemistry decreased by9%and23%respectively, and the chlorophyll content of Chamaedorea elegansm leaves was decreased by30%, net photosynthesis decreased1.04μmol CO2·m-2·s-1, water use efficiency decreased by0.06mmol·mol-1, stomatal conductance decreased by23%, intercellular CO2concentration increased by8%, transpiration decreased by81%, original fluorescence increased by17%, maximum fluorescence decreased by5%, maximal photochemical efficiency and potential activity of PS Ⅱ photochemistry decreased by8%and25%respectively.(4)Observed with the Light Microscope, the parenchyma cells of Dichroa feberifuga and Macropanax rosthornii leaves showed cytomorpgosis under the high fonnaldehyde stress, but no change was found in the Chamaedorea elegansm leaves.(5)By the comprehensive evaluation of subject function, we found that the formaldehyde resistance of leaves from high to low was Chamaedorea elegansm, Macropanax rosthornii, Dichroa feberifuga.
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