| 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 |
| Key Words: wheat leaves heat stress exogenous nitrogen photosynthetic characteristics |
| Author Name | Affiliation | | LIU Hong-zhan | Marine College,Shandong University,Weihai,Shandong 264209,China | | ZHENG Feng-rong | Marine College,Shandong University,Weihai,Shandong 264209,China | | ZHAO Shi-jie | College of Life Sciences,Shandong Agricultural University,Taian,Shandong 271018,China |
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| Abstract: |
| 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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