Effect of light conditions on growth,physiology and biochemistry of Ormosia ho-siei seedlings
The effect of different light intensity on the growth,physiology and biochemistry of 1-year-old seed-lings of Ormosia hosiei was investigated by a pot experiment with different light transmittance shade nets.The results showed that the growth of O.hosiei seedlings was the best under 50％light,and the seedling height increment(7.31 cm),root diameter increment(3.35 mm),main root length(13.51 cm),aboveground biomass(12.64 g),underground biomass(13.14 g),and total biomass(25.78 g)were the highest.With the increase of shade,the net photosynthetic rate(Pn)and transpiration rate(Tr)of O.hosiei increased and then decreased,and the suitable light intensity was 50％to 75％;the chlorophyll content,relative cell membrane conductivity and superoxide dis-mutase content of the leaves showed an increasing trend,exhibiting a defensive response under low light.Malondial-dehyde content was minimal under 50％light,and the membrane lipid peroxidation of the seedlings was enhanced under strong and low light.In conclusion,the growth performance of O.hosiei seedlings under different light condi-tions was 50％sunlight＞75％sunlight＞25％sunlight＞100％sunlight;50％sunlight was the most favorable for the growth of the seedlings.
Ormosia hosieilight conditionsseedlinggrowthphysiology and biochemistry
万方数据
维普
