| 低温胁迫下钼对冬小麦光合作用特性的影响 |
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| 引用本文： | 孙学成,胡承孝,谭启玲,甘巧巧.低温胁迫下钼对冬小麦光合作用特性的影响[J].作物学报,2006,32(9):1418-1422. |
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| 作者姓名： | 孙学成 胡承孝 谭启玲 甘巧巧 |
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| 作者单位： | 华中农业大学微量元素研究中心，湖北武汉430070 |
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| 基金项目： | 教育部跨世纪优秀人才培养计划;国家博士科研启动项目 |
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| 摘 要： | 研究了低温胁迫下施钼对冬小麦钼高效品系97003和钼低效品系97014叶片光合参数的影响。结果表明，低温胁迫下施钼显著提高2个品系叶片的净光合速率(Pn)和气孔限制值(Ls)，显著降低叶片气孔导度(Gs)、胞间CO2浓度(Ci)和蒸腾速率(Tr)。随着低温处理时间的延
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| 关 键 词： | 钼 净光合速率 气孔导度 胞间CO2浓度 蒸腾速率 气孔限制值 |
| 收稿时间： | 2005-09-28 |
| 修稿时间： | 2006-01-26 |
Effects of Molybdenum on Photosynthetic Characteristics in Winter Wheat under Low Temperature Stress |
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| SUN Xue-Cheng,HU Cheng-Xiao,TAN Qi-Ling,GAN Qiao-Qiao.Effects of Molybdenum on Photosynthetic Characteristics in Winter Wheat under Low Temperature Stress[J].Acta Agronomica Sinica,2006,32(9):1418-1422. |
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| Authors: | SUN Xue-Cheng HU Cheng-Xiao TAN Qi-Ling GAN Qiao-Qiao |
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| Institution: | Microelement Research Center, Huazhong Agricultural University, Wuhan 430070, Hubei, China |
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| Abstract: | Effects of molybdenum(Mo) on several photosynthetic parameters in winter wheat were investigated under low temperature stress using Mo-efficient line 97003 and Mo-inefficient line 97014.The results indicated that the net photosynthetic rate(P_n) and stomatal limitation(L_s) increased significantly(P<0.05), while stomatal conductance(G_s),intercellular CO_2 concentration(C_i) and transpiration rate(T_r) decreased significantly(P<0.05) in Mo-fertilized treatment of both wheat lines under low temperature stress.From 0 to 6 days of low temperature stress in Mo-fertilized treatment,with the decline of P_n,decrease of C_i and increase of L_s,indicating that stomatal limitation was the main factor to P_n decline.In Mo-deficient treatment,with the decline of P_n,C_i was decreased and L_s was increased at earlier stage of low temperature stress(0 to 4 days),whereas C_i was increased and L_s was decreased at later stage(4 to 6 days),implying that the probable main factors for P_n decline were stomatal limitation at earlier stage of low temperature stress,and non-stomatal limitation at later stage.Genotypic differences in response to the effects of molybdenum on the photosynthetic parameters exist between Mo-efficient line 97003 and Mo-inefficient line 97014.The changing rates of P_n and T_r of 97014 were significantly higher than those of 97003 in Mo-fertilized treatment. |
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| Keywords: | Molybdenum Net photosynthetic rate(P_n) Stomatal conductance(G_s) Intercellular CO_2 concentration(C_i) Transpiration rate(T_r) Stomatal limitation(L_s) |
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