余利平,张春雷,马霓,李俊,李光明.甘蓝型油菜对干旱和低磷双重胁迫的生理反应Ⅱ：叶片叶绿素含量及叶绿素荧光参数[J].干旱地区农业研究,2013,31(2):169~175
甘蓝型油菜对干旱和低磷双重胁迫的生理反应Ⅱ：叶片叶绿素含量及叶绿素荧光参数
Physiological responses of rapeseed(Brassica napus) to drought and phosphorus deficiency Ⅱ: Chlorophyll content and chlorophyll fluorescence parameters
  
DOI：10.7606/j.issn.1000-7601.2013.02.31
中文关键词:  甘蓝型油菜  干旱  低磷  叶绿素含量  叶绿素荧光参数
英文关键词:rapeseed (Brassica napus)  drought stress  phosphorus deficiency  chlorophyll content  chlorophyll fluorescence parameter
基金项目:国家自然科学基金(31101124)；国家油菜产业技术体系建设专项(nycytx-005)；国家科技支撑计划课题(2009BADA8B01)；公益性行业(农业)科研专项(200903003)
作者单位
余利平 中国农业科学院油料作物研究所，农业部油料作物生物学重点开放实验室，农业部作物生理生态与栽培重点开放实验室， 湖北 武汉 430062 
张春雷 中国农业科学院油料作物研究所，农业部油料作物生物学重点开放实验室，农业部作物生理生态与栽培重点开放实验室， 湖北 武汉 430062 
马霓 中国农业科学院油料作物研究所，农业部油料作物生物学重点开放实验室，农业部作物生理生态与栽培重点开放实验室， 湖北 武汉 430062 
李俊 中国农业科学院油料作物研究所，农业部油料作物生物学重点开放实验室，农业部作物生理生态与栽培重点开放实验室， 湖北 武汉 430062 
李光明 中国农业科学院油料作物研究所，农业部油料作物生物学重点开放实验室，农业部作物生理生态与栽培重点开放实验室， 湖北 武汉 430062 
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中文摘要:
      通过对叶绿素含量及叶绿素荧光参数的测定和分析，研究了干旱和低磷胁迫对油菜不同生育期叶片叶绿素荧光特性的影响。结果表明：与对照相比，油菜在蕾苔期和花期受到干旱和低 磷胁迫后，叶绿素含量、最大荧光(Fm)、PSⅡ最大的光化学量子产量(Fv/Fm)、PSⅡ实际的光化学量子产量(ΦPSⅡ)、光化学淬灭系数(qP)、表观光合电子传递速率(ETR)显著降低，初始荧光(Fo)、非光化学淬灭系数(NPQ)则显著上升，但在苗期却没有显著的变化。表明油菜在蕾苔期和花期遭受到干旱和低磷胁迫后，油菜叶片PSⅡ反应中心受到损伤，光合电子传递过程受到抑制；这些参数在蕾苔期由低磷胁迫引起的变化幅度明显大于由干旱胁迫引起的变化幅度，在花期则相反。蕾苔期是低磷胁迫对油菜造成光抑制影响最大的时期，而花期则是干旱胁迫对油菜造成光抑制影响最大的时期。
英文摘要:
      The chlorophyll content and chlorophyll fluorescence parameters were measured to explore the effects of drought and phosphorus deficiency on characteristics of chlorophyll parameters in leaves of rapeseed during different growing stages. The results showed that, under drought and phosphorus deficiency during the stem elongation and flowering stage, the content of chlorophyll, maximum fluorescence(Fm), PSⅡmaximum quantum yield(Fv/Fm), PSⅡ actual quantum yield(ΦPSⅡ), photochemical quenching coefficient(qP) and apparent photosynthetic electron transport rate(ETR) were obviously decreased, while the initial fluorescence(Fo) and non-photochemical quenching coefficient (NPQ) were obviously increased. But these parameters did not obviously change during the seedling stage. Therefore, under drought and phosphorus deficiency during the stem elongation and flowering stage, the PSⅡ reaction center in leaves of rapeseed was damaged and the process of photosynthetic electron transport was restrained. Furthermore, the change extent of these parameters that was caused by phosphorus deficiency was greater than that was caused by drought stress during the stem elongation stage, but it was opposite during the flowering stage. The period during which the maximal effect of photoinhibition was caused by phosphorus deficiency was the stem elongation stage, but that by drought stress was the flowering stage.
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