强光胁迫对18个冬小麦幼苗叶片光合特性的影响  

Effects of Highlight Stress on Photosynthesis-related Indicators in Leaves of Eighteen Winter Wheat Seedlings

作　　者：张文会[1] 魏秀俭[1] 吕艳伟[1] 苗秀莲[1] 宋振亮[1] 李玉霞[1] 

机构地区：[1]聊城大学生命科学学院,山东聊城252059

出　　处：《麦类作物学报》2010年第3期454-458,共5页Journal of Triticeae Crops

基　　金：国家自然科学基金项目(30771156)

摘　　要：为了研究强光胁迫对小麦叶片光合作用及某些相关指标的影响,以18个冬小麦品种幼苗为材料,对室外自然光条件下生长的幼苗进行强光(1 500μmol.m-2.s-1)照射处理3 h(强光处理),对实验室内人工光照下生长的幼苗进行临时强光(1 500μmol.m-2.s-1)照射处理3 h(临时强光处理)。结果表明,强光胁迫对色素含量的影响较为复杂,品种间差异较大。强光处理对叶绿素含量的影响较小,对类胡萝卜素含量的影响较大;临时强光处理对叶绿素含量的影响较强光处理大,而类胡萝卜素含量与强光处理的差异不显著。强光胁迫抑制了所用供试品种的Fv/Fm比值,其中临时强光胁迫抑制作用更大。说明强光胁迫下PSⅡ的功能较易受到抑制,影响光电转换及电子传递,对光合作用影响较大。强光胁迫使光化学反射指数PRI呈降低的趋势,但是对PRI的影响比对上述指标的影响小。Eighteen winter wheat seedlings were used as materials to investigate the effects of different high light treatments on photosynthesis and as well as the correlative index on leaves.The high light treatment included long-term strong light and 3 h temporary strong light,respectively.The results indicated that the content of photosynthetic pigments responded to high light stress in a complex way and varied greatly among wheat varieties.On the other hand,the effects of high light stress on the content of chlor...

关 键 词：冬小麦 幼苗 强光胁迫 光合作用 

分 类 号：S512.1[农业科学—作物学]