| Chlorophyll fluorescence characteristics of top two leaves in non-sequencial senescence wheat under drought condition |
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| DOI：10.7606/j.issn.1000-7601.2016.01.27 |
| Key Words: wheat drought non-sequencial senescence chlorophyll fluorescence chlorophyll |
| Author Name | Affiliation | | YANG Xia | College of Life Science, Northwest A＆F University, Yangling 712100, Shaanxi, China | | LI Yi-bo | College of Life Science, Northwest A＆F University, Yangling 712100, Shaanxi, China | | BAI Yue-mei | College of Life Science, Northwest A＆F University, Yangling 712100, Shaanxi, China | | MIAO Fang | College of Life Science, Northwest A＆F University, Yangling 712100, Shaanxi, China | | LIU Dang-xiao | College of Life Science, Northwest A＆F University, Yangling 712100, Shaanxi, China | | YI Hua | College of Life Science, Northwest A＆F University, Yangling 712100, Shaanxi, China |
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| Abstract: |
| Chlorophyll fluorescence characteristics of flag leaf and the second leaf in sequential senescence wheat Shaan 229 and non-sequential senescence wheat Wenmai 19, Lankaoaizao8 and Yumai19 were measured after flowering under drought and natural conditions. Chlorophyll content, ΦPSII, Fv/Fm, Fv/Fo of flag leaf and the second leaf in reverse order of the tested wheat varieties from flowering to mature were decreased, but Fo/Fm was increased under drought condition and natural condition. The difference of sequential senescence and non-sequential senescence was obvious at 30 d after flowering. In drought condition, chlorophyll content, ΦPSII, Fv/Fm, Fv/Fo of flag leaf of non-sequential senescence wheat Wenmai 19, Lankaoaizao8 and Yumai19 were respectively lower than the second leaf. By contrast, Fo/Fm of flag was higher than the second leaf. In natural condition, chlorophyll content, ΦPSII, Fv/Fm, Fv/Fo of flag leaf of non-sequential senescence wheat Wenmai 19, Lankaoaizao8 and Yumai19 were respectively lower than the second leaf. However, Fo/Fm of flag was higher than the second leaf. The chlorophyll fluorescence characteristics of flag leaf and the second leaf in sequential senescence wheat Shaan 229 was opposite from the non-sequential senescence wheat. In drought condition, leaf senescence was noticeably accelerated, the difference of chlorophyll fluorescence characteristics of flag leaf and the second leaf was larger, and the phenomenon of sequential senescence and non-sequential senescence were observable. |
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