Leaf Nitrogen Content and CO2 Assimilation Capacity in Peach1
Leaf Nitrogen Content and CO2 Assimilation Capacity in Peach1
复制标题
桃叶片氮含量和二氧化碳同化能力1
DOI：
10.21273/jashs.107.6.955
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发表时间：
1982
影响因子：
1.9
通讯作者：
T. Dejong
中科院分区：
文献类型：
--
作者：
T. Dejong
桃叶光合能力的差异 [Prunus persica (L.) Batsch cv. Golden Glory]结合其叶片氮和磷含量进行了调查。以叶面积为基础的光合CO2同化、叶肉导度和叶片对水蒸气的导度均与以叶面积为基础的叶片氮含量线性相关（R2分别为0.908、0.921、0.685）。随着CO2同化率和叶片N含量的增加，叶片细胞间CO2浓度略有下降，表明同化能力较低的叶片中CO2同化并未受到低细胞间CO2浓度和叶片电导的限制。 CO2同化、叶肉导度和叶片对水蒸气的导度也与叶片磷含量线性相关，但这些关系不像叶片氮含量那么清晰。 （R2 分别 = 0.601、0.687、0.324）。本实验中桃叶单位叶氮CO2最大同化率在6.0~7.0 nmol CO2 mg N−1 s−1之间。
Differences in the photosynthetic capacity of leaves of peach [Prunus persica (L.) Batsch cv. Golden Glory] were investigated in conjunction with their leaf nitrogen and phosphorus content. Photosynthetic CO2 assimilation expressed on a leaf area basis, mesophyll conductance, and leaf conductance to water vapor were all linearly related to leaf nitrogen content expressed on a leaf area basis (R2 = 0.908, 0.921, 0.685, respectively). Leaf intercellular CO2 concentrations tended to decrease slightly with increasing CO2 assimilation rates and leaf N contents, indicating that CO2 assimilation was not being restricted by low intercellular CO2 concentrations and leaf conductances in leaves with lower assimilation capacity. CO2 assimilation, mesophyll conductance, and leaf conductance to water vapor were also linearly related to leaf phosphorus content, but these relationships were not as clear as for leaf nitrogen content. (R2 = 0.601, 0.687, 0.324, respectively). The maximum CO2 assimilation rate per unit of leaf nitrogen for peach leaves in this experiment was between 6.0 and 7.0 nmol CO2 mg N−1 s−1.