摘要
探究吉利红粗肋草(Aglaonema commutatun'Big Apple')对室内不同光照处理的生理响应,确定吉利红粗肋草最适的光照环境.以吉利红粗肋草为试验材料,采用人工气候箱模拟不同的弱光环境,以 7 种梯度(200、100、60、40、20、10、2 μmol/(m2·s)处理吉利红粗肋草幼苗,研究其叶片表观变化、叶绿素荧光参数、生理生化指标并分析主成分及相关性.在 60～100 μmol/(m2·s)下吉利红粗肋草生长良好,在 60 μmol/(m2·s)时叶色最红,此时叶绿素总量和类胡萝卜素含量相对较低.随光照强度的降低初始荧光参数(Fo)呈上升趋势,最大光化学效率(Fv/Fm)、光化学淬灭系数(qP)、光合电子传递速率(ETR)、超氧化物歧化酶(SOD)、可溶性糖(SS)和可溶性蛋白(SP)含量均呈先上升后下降趋势;电导率总体呈先降后升的趋势,丙二醛(MDA)含量总体呈先降后升再降的趋势.通过主成分分析发现,不同光照对吉利红的影响由小到大分别为 60、100、40、200、20、10、2 μmol/(m2·s).在 60 μmol/(m2·s)左右光照环境下吉利红生长最好,过高或过低的光照环境都会对吉利红的生长产生不利影响.
Abstract
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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