| Study on senescence and chlorophyll fluorescence traits of stay-green leaf in wheat |
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| DOI：10.7606/j.issn.1000-7601.2010.04.22 |
| Key Words: stay-green wheat green leaf area chlorophyll fluorescence |
| Author Name | Affiliation | | WU Yongsheng | College of Life Sciences, Northwest A & F Universiy, Yangling，Shaanxi 712100, China | | XUE Hui | College of Life Sciences, Northwest A & F Universiy, Yangling，Shaanxi 712100, China | | LIU Yang | College of Life Sciences, Northwest A & F Universiy, Yangling，Shaanxi 712100, China | | GONG Yuehua | College of Life Sciences, Northwest A & F Universiy, Yangling，Shaanxi 712100, China |
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| Abstract: |
| In order to investigate thoroughly the senescence and chlorophyll fluorescence traits of stay-green leaf in
wheat, and to provide some theoretical base to screen for high yield wheat varieties in Northwest China, the green leaf area , pigment content, MDA content and the chlorophyll fluorescence parameters after anthesis were measured in 4 winter wheat varieties . The result showed that: (1) The green leaf area of stay-green wheat was obviously higher than non stay-green wheat, it decreased slowly at the late grain filling stage. (2) The pigment content of leaf in stay-green wheat de-creased more slowly at the late grain filling stage. (3) The MDA content of leaves in wheat showed an increasing trend,but the MDA content of stay-green wheat increased more slowly and kept a lower level than non stay-green wheat. (4)During the late grain flling, the Fv/ Fm, Fu/Fo, qP, φPSⅡ and ETR of stay-green wheat were obviously higher than the non stay-green wheat, but the qN of stay-green wheat was obviously lower than the non stay-green wheat. (5) The grain yield of stay-green wheat was high. All these suggested that the slower leaf senescence and longer photosynthesis period at the late grain filling stage of stay-green wheat led to a higher yield. So the stay-green wheat has better produc-tion superiority. |
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