Effects of Different Lights on the Physiological Characteristics and Fluorescence Parameters of Aglaonema commutatun
To investigate the physiological response of Aglaonema commutatun'Big Apple'to different light treatments in-doors and to determine the optimum light environment for A.commutatun'Big Apple'.A.commutatun'Big Apple'seedlings were subjected to seven gradients(200,100,60,40,20,10,and 2 μmol·m-2·s-1)via an artificial climate chamber to simulate different low-light environments.A.commutatun'Big Apple'was used as the test material,and leaf phenological changes,chlorophyll fluorescence parameters,physiological and biochemical indices were studied and subjected to principal component and correlation analysis.A.commutatun'Big Apple'grew well under f 60-100 μmol·m-2·s-1 light conditions,with the reddest leaf color at 60 μmol·m-2·s-1,when the total chlorophyll and carotenoid contents were relatively low.With increasing light stress,the initial fluorescence parameter Fo tended to increase,and the values of Fv/Fm,qP,ETR,SOD,SS,and SP all tended to increase.Conductivity tended first to decrease but then increase,and the MDA content tended to decrease,then increase,and then decrease.The effects of different lights on'Big Apple'were found to be 60,100,40,200,20,10,and 2 μmol·m-2·s-1 in descending order of magnitude via principal component analysis.A.commutatun'Big Apple'grows best under a light en-vironment of about 60 μmol·m-2·s-1,and too high or too low light environment can causing adverse effects to the growth of A.commutatun'Big Apple'.
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