| 摘要: |
| 为研究不同倍性谷子光合因子日响应差异，构建光量子通量密度确定的条件（1 200 μmol/（m2·s））下各生理指标之间的互作模型。以谷子栽培种普通二倍体（2x）晋谷21号及其同源四倍体（4x）诱变株系为材料，收集2013—2015年的光合因子数据，运用spss.18.0与microsoft mathematics v4.0对不同倍性谷子光合因子的响应关系进行相关分析和通径分析，得到参数间因变关系的决策系数（R2）及模式方程。结果表明：1）不同倍性谷子叶片净光合速率（Pn）与胞间CO2浓度（Ci）、蒸腾速率（E）和叶温（T）的关系较密切。剔除其他因子干扰，不同倍性谷子净光合速率均与叶温直接相关。叶温主要通过胞间CO2浓度和蒸腾速率影响作物的净光合速率。空气相对湿度（RH）对净光合速率的直接影响较小，而气孔导度（Gs）对净光合速率的影响主要是通过影响胞间CO2浓度来实现，其影响因子则主要是空气相对湿度。2）二倍体谷子光合因子间线性关系较为明显，而四倍体更多是相关因子协同作用的结果。本研究获得的模型可以准确拟合不同倍性谷子在一定光量子通量密度下光合因子的日响应。 |
| 关键词: 谷子二倍体 谷子同源四倍体 净光合速率 通径分析 决策系数 |
| DOI：10.11841/j.issn.1007-4333.2018.06.02 |
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| 基金项目:农业科技成果转化资金项目（2014GB2A300004）；山西省科技攻关项目（20150300006-1） |
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| Establishment of simulation models on photosynthetic factors responding to diurnal variation under certain PFD of millets having different ploidies |
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WANG Xiaoyu1, YUAN Feng1, HAO Xiaofen1, LIU Xing1, WANG Xuemei2, WANG Genquan1, WANG Jiezhi1
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| (1.Institute of Millet Science, Shanxi Academy of Agricultural Science, Changzhi 046011, China;2.Institute of Crop Science, Shandong Academy of Agricultural Science, Jinan 250100, China) |
| Abstract: |
| To study photosynthetic factors responding to diurnal variation of millet with different ploidies, the interaction models of physiological indices on PFD(photon flux density)of 1 200 μ mol/(m2·s)were constructed.Cultivar of Jingu 21(2x)and its autotetraploid(4x)were taking as study materials.Data were collected from 2013 to 2015.Correlation analysis and stepwise regression analysis were used to explore interactions.Decision coefficients(R2)of photosynthesis factors with environmental factors, which were analyzed by SPSS.18.0 and Microsoft Mathematics V4.0.The results showed that:1) Net photosynthetic rate(Pn)was closely related with intercellular CO2 concentration(Ci), evaporation rate(E)and leaf temperature(T)of different ploidies.Apart from other factors, net photosynthetic rate had direct relation with leaf temperature.Intercellular CO2 concentration effected net photosynthetic rate by leaf temperature.The relative humidity of air displayed little correlation with net photosynthetic rate.The stomatal conductance(Gs)effect net photosynthetic rate by intercellular CO2 concentration, and its main impact factor is relative humidity of air.2) The linear interrelation of photosynthetic factors is significant for diploid millet, but it is the result from synergistic effect of different factors for autotetraploid.In conclusion, the models constructed in this study could simulate the photosynthetic factors responding to diurnal variation of millets having different ploidies. |
| Key words: diploid of millet autotetraploid of millet net photosynthetic rate path analysis decision coefficient |
