| 遮荫对两个基因型玉米叶片解剖结构及光合特性的影响 |
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| 引用本文： | 杜成凤,李潮海,刘天学,赵亚丽.遮荫对两个基因型玉米叶片解剖结构及光合特性的影响[J].生态学报,2011,31(21):6633-6640. |
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| 作者姓名： | 杜成凤 李潮海 刘天学 赵亚丽 |
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| 作者单位： | 河南农业大学农学院,郑州,450002 |
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| 基金项目： | 河南省重大公益科研项目(091100910100);公益性行业(气象)科研专项(GYHY201006041) |
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| 摘 要： | 以耐荫性不同的玉米品种郑单958(ZD958,耐荫性较强)和豫玉22(YY22,耐荫性较弱)为材料,研究了苗期50%遮荫对玉米叶片形态结构和光合特性的影响。结果表明:形态结构上,苗期遮荫处理后,玉米叶片变薄,单位面积叶绿体数目减少,基粒数、基粒厚度和片层数增加,但是YY22的叶绿体大部分发育不良,肿胀呈球形,基粒片层和基质片层出现不同程度的松散;而ZD958大部分叶绿体结构良好,各部分发育基本正常。光合特性上,弱光胁迫使玉米叶片叶绿素含量升高,净光合速率(Pn)、PSⅡ最大光化学量子产量(Fv/Fm)和实际光化学效率(ΦPSⅡ)降低,胞间CO2浓度(Ci)和非光化学猝灭(NPQ)增加,但是YY22的Pn、Fv/Fm和ΦPSⅡ显著下降,Ci和NPQ显著升高;而ZD958的Fv/Fm和ΦPSⅡ下降幅度较小,且NPQ增加亦不显著。研究结果提示,弱光胁迫对玉米叶片形态结构和光合特性影响较大,且存在基因型差异,耐荫性较强的品种对弱光环境的适应性较强。
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| 关 键 词： | 弱光胁迫 玉米 显微结构 叶绿体超微结构 光合特性 叶绿素荧光 |
| 收稿时间： | 9/8/2010 12:00:00 AM |
| 修稿时间： | 2011/6/13 0:00:00 |
Response of anatomical structure and photosynthetic characteristics to low light stress in leaves of different maize genotypes |
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| DU Chengfeng,LI Chaohai,LIU Tianxue and ZHAO Yali.Response of anatomical structure and photosynthetic characteristics to low light stress in leaves of different maize genotypes[J].Acta Ecologica Sinica,2011,31(21):6633-6640. |
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| Authors: | DU Chengfeng LI Chaohai LIU Tianxue and ZHAO Yali |
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| Institution: | Agronomy College, Henan Agricultural University, Zhengzhou 450002, China;Agronomy College, Henan Agricultural University, Zhengzhou 450002, China;Agronomy College, Henan Agricultural University, Zhengzhou 450002, China;Agronomy College, Henan Agricultural University, Zhengzhou 450002, China |
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| Abstract: | Prolonged rainy weather during the maize growing season can lead to insufficient light,and thus dramatically lower yields.Maize,Zea mays L.,is one of the most important food crops in China,and around the world,and a high and stable yield is necessary to guarantee food safety.Previous studies into the effects of low light stress on maize have predominantly focused on aboveground biomass,leaf area,chlorophyll content,net photosynthetic rate,root activity,soluble protein content,grain yield,nutrient levels,and... |
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| Keywords: | low light stress maize anatomical structure ultrastructure of chloroplast photosynthetic characteristics fluorescence parameter of chlorophyll |
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