摘要
为了明确杂交谷的光合优势是否是其产量高于常规谷的一大主因,本研究于2013年对常规谷晋谷21号和杂交谷张杂谷5号的光合和叶绿素荧光特性进行比较。采用完全随机设计,每个品种种植5个小区,在拔节期和灌浆期分别测定各项光合指标。结果表明,在拔节期,张杂谷5号的净光合速率、PSⅡ实际光化学量子产量显著高于晋谷21号;但在灌浆期,张杂谷5号和晋谷21号之间的总叶绿素含量、净光合速率、蒸腾速率、气孔导度、胞间CO2浓度、PSⅡ实际光化学量子产量、光化学淬灭参数和非光化学淬灭参数都存在显著差异。总体杂交谷在拔节期和灌浆期的光合性能高于常规谷。
In this study,the photosynthetic characteristics were compared between Zhangzagu 5 and Jingu 21 in jointing and filling stages. The results indicated Zhangzagu 5 had higher net photosynthetic rate than Jingu 21 in jointing and filling stages; The differences of chlorophyll content,intercellular CO2 concentration,evapotranspiration; stomatal conductance and coefficient of photochemical fluorescence quenching between Zhangzagu 5 and Jingu 21 were assessed in filling stages,but not in jointing stages. The difference between Zhangzagu 5 and Jingu 21 was marked for effective photochemical quantum yield in jointing and filling stages,but not for electron transport rate（ ETR）. In filling stages,Jingu 21 had higher coefficient of non-photochemical fluorescence quenching than Zhangzagu 5. The difference of maximum photochemical quantum yield between Zhangzagu 5 and Jingu 21 was significant in jointing and filling stages. In summary,the hybrid heterosis of hybrid foxtail millet in large part was reflected on the photosynthetic characteristics. Zhangzagu not only able to capture more light but also fully use of captured light energy for photosynthesis. The main reason that Zhangzagu 5 has higher yield than Jingu 21,is photosynthetic advantage of Zhangzagu 5.
出处
《作物杂志》
CAS
北大核心
2015年第3期146-149,共4页
Crops
基金
山西省科技攻关项目(20140311006-3)
山西省高校科技创新项目(2014149)
