硫营养对锌和干旱胁迫下玉米叶片中叶绿素含量的影响

以高水肥型玉米品种为供试作物,选用4种不同硫浓度的Hoagland营养液进行培养,添加锌进行重金属胁迫,以PEG6000模拟干旱胁迫,测定三叶期后,玉米功能叶片中叶绿素含量变化。结果表明:添加硫营养供应对提高作物叶绿素含量有着显著的效应,缺硫或不施硫营养可明显降低玉米功能叶片中叶绿素含量,重金属胁迫可明显导致不同硫浓度水平的玉米功能叶片中叶绿素含量的降低,干旱也可以明显导致叶绿素含量的降低,但随着营养液中硫浓度的增加对环境胁迫下玉米功能叶片叶绿素含量的降低有明显的缓解作用。

Effects of sulfur nutrition on the chlorophyll content of maize leaf under Zinc and drought stress

The changes of chlorophyll content in the functional leaves of maize,which was grown in the Hoagland Nutrients with 4 kinds of different S content ration,have been added with Zinc to carry on heavy metal stress,and measured after the 3 leaf period under drought stress which was stimulated by using PEG6000. The results showed that: the S supply plays an important role in increasing the content of chlorophyll.Lacking S or no S nourishment can lower the content of chlorophyll in the functional leaves;heavy metal stress obviously caused the decline of the chlorophyll.Drought stress also caused obviously the decrease of the chlorophyll,however,this effect may be evidently affected by increasing S nourishment;the chlorophyll content can be alleviated under environment stress.