25个中大花型菊花品种的光合特性比较

文档编号:SP018 文档字数:10603,页数:21

摘 要
 采用便携式Li－6400型光合作用测定仪，对25个中大型菊花品种进行了测定，综合分析比较了光合特性差异。研究结果表明：25个中大型菊花品种之间的净光合速率（Pn）、蒸腾速率（Tr）、胞间含水量（H2O-S）、气孔相对湿度（RH-S）、气孔导度（Gs）、 水分利用率(WUE)、胞间CO2浓度（Ci）都存在较大的差异。Pn与Ci存在着极显著的负相关关系，但与Tr、H2O-S、RH-S、Gs等光合生理性状相关性不大，Tr、H2O-S、RH-S、Gs之间存在着极显著相关关系。在25个品种中，‘二月王’、‘八月王’、‘卫星’‘神马’是高光合速率,高水分利用率的优良品种, 具有较高的生产种植潜力。
关键词：菊花品种  光合特性  光响应

The Photosynthesis Differences among 25 Medium- and Large-Sized
Inflorescence Chrysanthemum Cultivars

tract:     The photosynthetic characteristics of 25 chrysanthemum varieties were measured in present paper by Li-6400 portable photosynthesis system. The photosynthesis differences were comprehensively analyzed and compared. The results indicated that, among 25 cultivars of chrysanthemum varieties, there were very obvious differences in photosynthesis speed (Pn), the transpiration speed (Tr), the water content (H2O-S), the blowhole relative humidity (RH-S), the blowhole leads (Gs), water use efficiency (WUE) and the CO2 density between the cells (Ci). The correlation between Pn and Ci was significantly negative. The correlation of Pn and Tr, Pn and H2O-S, Pn and RH-S, Pn and Gs were not significant. The correlations between Tr, H2O-S,RH-S, Gs were very significant. Among 25 cultivars, some  cultivars had high WUE and high Pn, such as ‘Eryuewang’, ‘Bayuewang’, ‘Weixing’ and ‘Shenma’. Their yield potential was excellent．
Key words: chrysanthemum; photosynthesis; photoresponse

目        录
1  前言 1
2  材料和方法 2
2.1  材料 2
2.2  方法 2
3  结果分析 2
3.1  25个品种主要光合特性的分析 2
3.1.1  净光合速率（Pn）、蒸腾速率（Tr）及水分利用率(WUE)的分析 2
3.1.2  胞间CO2浓度（Ci）与净光合速率（Pn）变化趋势的比较 2
3.1.3  气孔导度（Gs）的分析 6
3.1.4  气孔相对湿度（RH-S）及胞间含水量（H2O-S）的比较 7
3.1.5　不同品种主要生理指标的相关关系 8
3.2  25个品种的聚类分析 9
3.3  25个品种光响应的比较 11
4  讨论 12
参考文献 14
英文摘要 15
致    谢 16
毕业文档成绩评定表及答辩问题 17

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