铅胁迫对草木樨叶中叶绿素含量和几种光合特性的影响_cropped

铅胁迫对草木樨叶中叶绿素含量和几种光合特性的影响_croppedEff ect of Lea d Stress on Chl orophyll Content an d Photosynthet ic

铅胁迫对草木樨叶中叶绿素含量和几种光合特性的影响 _cropped Eff ect of Lea dStress on Chl orophyll Content an d Photosynthet ic Characters in Leaf of Mel il ot us su aven a 11 ΞΞ 12 1ZHOU Ch ao2bi n, HU Ti ng2xi ng ,XU Xi ao2g an g ,L IU Ji n2p in g, LIU Ji an (1 .College of Forest ry and Horticult ure ;2 .College of Animal and Technology , )Sichuan Agricult ural University ,Yaan 625014 ,Sichuan ,China () Abstract :Pot experiment was co nducted to st udy the effect of lead st ress on photo synt hetic rate Pn, sto matal co nductance and chlo rop hyll co ntent of Mel ilot us su aven awit hdifferent lead co ncent ratio nt reat ment .Result sare as the following :w hen lead co ncent ratio nis 1000 mg/ L, the lead co ntent of leaf reaches maximum value ,and the chlo rop hyll co ntent reduces to minimum ;Pn ,light sat uratio npoint () and apparent quant um yield AQ Yare higher than the co nt rol w hen lead co ncent ratio nis 200 mg/ L, 400 mg/ Land 600 mg/ L, and t he ot hers are lower than the co nt rol .The change of sto matal co nduc2 tance is the same as photo synt hetic rate’s. Light co mpensatio npoint was not changed wit hdifferent lead co ncent ratio n treat ment . Key words :lead st ress ;M el ilot us su aven a; photo synt