CAJ | 학술논문

在模拟光条件下,通过盆栽试验研究了外源镉胁迫对盆栽玉米光合特性的影响.结果表明,高浓度镉(100mg·kg~(-1))胁迫下玉米叶片叶绿素a、b及总叶绿素c含量明显减少,分别比对照CK下降了65.32%、54.95%、62.57%.镉浓度1、5、15、50 mg·kg~(-1)处理下叶片的叶绿素含量下降得少,Cha/Chb的比值降低较少.镉浓度15、50、100 mg·kg~(-1)胁迫下导致玉米叶片光合速率下降,光补偿点提高,光饱和点和表观量子效率降低,暗呼吸速率升高,较低浓度镉胁迫(1、5 mg·kg~(-1))则提高光补偿点、光饱和点和表观量子效率,降低暗呼吸速率.
재모의광조건하,통과분재시험연구료외원력협박대분재옥미광합특성적영향.결과표명,고농도력(100mg·kg~(-1))협박하옥미협편협록소a、b급총협록소c함량명현감소,분별비대조CK하강료65.32%、54.95%、62.57%.력농도1、5、15、50 mg·kg~(-1)처리하협편적협록소함량하강득소,Cha/Chb적비치강저교소.력농도15、50、100 mg·kg~(-1)협박하도치옥미협편광합속솔하강,광보상점제고,광포화점화표관양자효솔강저,암호흡속솔승고,교저농도력협박(1、5 mg·kg~(-1))칙제고광보상점、광포화점화표관양자효솔,강저암호흡속솔.
The pot experiment was conducted to study the effects of added cadmium(Cd)on photosynthetic characteristics of maize under simulated photosynthetic radiation(PAR).The results showed that in the high concentration of Cd(100 mgkg~(-1))stress,corn leaf blade chlorophyll a, b and the total chlorophyll c content obvious reduction, the distinction ratio compared CK to drop 65.32%, 54.95%, 62.57%. The concentration Cd(1,5,15,50mg·kg~(-1))under processing leaf blade's chlorophyll content dropped little,the Cha/Chb ratio reduced few.The concentration Cd(15,50,100mg·kg~(-1))forces caused the corn leaf blade photosynthesis speed to drop,the light compensation point enhanced, the light saturation point and the apparent quantum efficiency reduced, the dark respiratory rate elevated, the low concentra-tion cadmium coercion(1,5mg·kg~(-1))enhanced the light compensation point,the light saturation point and the apparent quantum efficiency, cut the dark respiratory rate.