| 刘洪展,郑风荣,赵世杰.根外施氮对热胁迫下小麦叶片光合特性的影响[J].干旱地区农业研究,2006,(2):52~56 |
| 根外施氮对热胁迫下小麦叶片光合特性的影响 |
| Effects of exogenous nitrogen nutrition of roots on photosynthetic characteristics of leaves in wheat under heat stress |
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| DOI：10.7606/j.issn.1000-7601.2006.02.12 |
| 中文关键词: 小麦叶片 外源氮素营养 热胁迫 光合特性 |
| 英文关键词:wheat leaves heat stress exogenous nitrogen photosynthetic characteristics |
| 基金项目:山东省科技厅重点项目(鲁科农字[2001]500号) |
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| 中文摘要: |
| 研究了38℃热胁迫下用外源氮素处理的小麦叶片中光合作用部分指标的变化,结果表明:在适度的热胁迫过程中,低浓度氮素营养处理的小麦叶片中叶绿素及可溶性蛋白含量、Fv/Fm及ФPSⅡ、表观量子效率稍微下降,而NPQ及光饱和速率有上升的趋势;较高浓度氮素营养的小麦叶片中叶绿素及可溶性蛋白含量、表观量子效率及光饱和速率明显增加,NPQ降低,Fv/Fm及ФPSⅡ有升高的趋势。说明热胁迫条件下,外施氮素营养可以提高小麦叶片的光合能力,缓解热胁迫造成的光合损伤。 |
| 英文摘要: |
| The changes of photosynthetic parameters in the leaves of wheat treated by exogenous nitrogen were studied under 38℃ heat-stress.The results showed: under the condition of moderate heat-stress,the contents of chlorophyll and soluble protein,Fv/Fm,ФPSⅡ and apparent quantum yields in the leaves were slightly reduced,and NPQ and photosynthetic rate of light-saturation were increased when the plants were treated by low-concentration nitrogen;however,the contents of chlorophyll and soluble protein,apparent quantum yields,photosynthetic rate of light-saturation,Fv/Fm and ФPSⅡ were enhanced,and NPQ was reduced when the plants were treated by high-concentration nitrogen.It is concluded that applying exogenous nitrogen nutrition can improve the foliar photosynthesis ability of wheat and alleviate photosynthetic damage by heat stress. |
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