Variations in physiological, biochemical, and structural traits of photosynthesis and resource use efficiency in maize and teosintes (NADP-ME-type C4).
Variations in physiological, biochemical, and structural traits of photosynthesis and resource use efficiency in maize and teosintes (NADP-ME-type C4).
复制标题
玉米和类蜀黍（NADP-ME-C4型）光合作用和资源利用效率的生理、生化和结构特征的变化。
DOI：
10.1080/1343943x.2017.1398050
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发表时间：
2017
影响因子：
2.5
通讯作者：
Ueno O
中科院分区：
文献类型：
--
作者：
1. Yabiku T;Ueno O
C4植物比C3植物具有更高的光合能力和资源利用效率。然而，这些性状在C4植物中的遗传变异及其调控因子仍有待解决。我们调查了来自世界各地的22个玉米品系和4个大刍草品系的光合作用和光合水氮利用效率（PWUE和PNUE）的生理，生化和结构性状。净光合速率（PN）变化范围为32.1 ~ 46.5 μmol m−2s− 1，与气孔导度、蒸腾速率、叶绿素、氮和可溶性蛋白含量呈显著正相关，与比叶重不相关，与核酮糖-1，5-二磷酸羧化酶/加氧酶、C4-酸脱羧酶、NADP-苹果酸酶和磷酸烯醇丙酮酸羧化酶活性呈显著正相关，与叶绿素、氮和可溶性蛋白含量呈显著正相关。但不具有磷酸烯醇丙酮酸羧化酶的活性。叶片结构性状（气孔参数、叶片厚度和脉间距）与PN不相关。这些数据表明，生理生化性状参与了PN的遗传变异，但结构性状没有直接参与。PWUE在C4植物报告的数值中属于较低类别，而PNUE在C4植物报告的数值中属于最高类别。PNUE与叶片含氮量呈负相关，与PN相关不显著。叶片的δ 13 C值与叶片的PWUE无相关性，表明δ 13 C值难以作为衡量玉米PWUE的指标。总的来说，与玉米系相比，大白菜系的PN较低，但PWUE较高。
C4plants show higher photosynthetic capacity and resource use efficiency than C3plants. However, the genetic variations of these traits and their regulatory factors in C4plants still remain to be resolved. We investigated physiological, biochemical, and structural traits involved in photosynthesis and photosynthetic water and nitrogen use efficiencies (PWUE and PNUE) in 22 maize lines and four teosinte lines from various regions of the world. Net photosynthetic rate (PN) ranged from 32.1 to 46.5 μmol m−2s−1.PNwas positively correlated with stomatal conductance, transpiration rate, and chlorophyll, nitrogen and soluble protein contents of leaves, but not with specific leaf weight.PNwas positively correlated with the activities of ribulose-1,5-bisphosphate carboxylase/oxygenase and the C4-acid decarboxylases, NADP-malic enzyme and phosphoenolpyruvate carboxykinase, but not with the activity of phosphoenolpyruvate carboxylase. Leaf structural traits (stomatal parameters, leaf thickness, and interveinal distance) were not correlated withPN. These data suggest that physiological and biochemical traits are involved in the genetic variation ofPN, but structural traits are not directly involved. PWUE is in the lower class of values reported for C4plants, whereas PNUE is in the highest class of values reported for C4plants. PNUE was negatively correlated with leaf nitrogen content but not significantly correlated withPN. PWUE was not correlated withδ13C values of leaves, indicating difficulty in usingδ13C values as an indicator of PWUE of maize. In general, teosinte lines showed lowerPNbut higher PWUE than maize lines.