| 干旱胁迫对假俭草叶绿素荧光特性的影响 |
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| 引用本文： | 代微然,任健,墨继光. 干旱胁迫对假俭草叶绿素荧光特性的影响[J]. 草原与草坪, 2010, 30(5): 1-5 |
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| 作者姓名： | 代微然 任健 墨继光 |
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| 作者单位： | 1. 云南农业大学,草业科学系,云南,昆明,650201
2. 云南迪庆藏族自治州畜牧兽医站,云南,香格里拉,674400 |
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| 基金项目： | 云南农业大学博士科研启动基金(A2002119); 云南省教育厅基金(09C0258)资助 |
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| 摘 要： | 试验以假俭草(Eremochloa ophiuroides)的Yaan和Common品系为材料,研究了中度干旱(土壤含水量为田间最大持水量的50%)和重度干旱(土壤含水量为田间最大持水量的35%)胁迫对假俭草叶绿素荧光参数及叶绿素含量的影响。结果表明,重度干旱胁迫显著地提高了Yaan和Common叶片中类胡萝卜素含量及Common叶片中叶绿素A和叶绿素B的含量。干旱胁迫显著地降低了供试材料的最大荧光(Fm)、可变荧光(Fv)、PSII最大光化学量子产量(Fv/Fm)和PSⅡ潜在活性(Fv/Fo)及光合量子产额(Yield),而对基础荧光(Fo)、光化学猝灭系数(qP)和非光化学猝灭系数(qN)没有产生显著影响;与对照相比,在Common和Yaan品系中PSⅡ最大光化学量子产量分别下降了15%和5%,说明干旱胁迫会伤害假俭草的光系统Ⅱ。2个品系的叶绿素荧光参数对干旱胁迫的反应存在一定的差异。在重度干旱胁迫下,Common的Fo有上升趋势,而Fm显著降低;Yaan品系Fo呈下降趋势,Fm无显著变化。
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| 关 键 词： | 干旱胁迫 假俭草 叶绿素含量 叶绿素荧光 光合量子产额 |
Effects of drought stress on features of chlorophyll fluorescence of Eremochloa ophiuroides |
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| DAI Wei-ran,REN Jian,MO Ji-guang. Effects of drought stress on features of chlorophyll fluorescence of Eremochloa ophiuroides[J]. Grassland and Turf, 2010, 30(5): 1-5 |
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| Authors: | DAI Wei-ran REN Jian MO Ji-guang |
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| Affiliation: | DAI Wei-ran1,REN Jian1,MO Ji-guang2(1.Dept.of Grassl, Science,Yunnan Agricultural University,Kunming 650201,China,2.Animal Husb,ry , Veterinary Station of Diqing Tibetan Autonomous Prefecture,Shangri-La 674400,China) |
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| Abstract: | The chlorophyll fluorescence parameters and chlorophyll content of 2 strains(Yaan and Common)of centipedegrass from different origins were studied under 3 irrigation regimes(percentage of field water capacity):full irrigated(80%),moderate drought(50%),heavy drought(35%).The results indicated that carotinoids content of 2 strains and as the chlorophyll a+b content of Common were significantly increased by heavy drought,but the change of chlorophyll a+b content of Yaan was not significant.For both 2 strains,i... |
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| Keywords: | drought stress Eremochloa ophiuroides chlorophyll content chlorophyll fluorescence quantum yield |
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