Yue X L, Liu X F, Fang S Z
College of Forestry, Nanjing Forestry University, Nanjing, China.
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China.
Photosynthetica. 2023 Jun 19;61(3):318-327. doi: 10.32615/ps.2023.023. eCollection 2023.
has been traditionally used as a functional food in China. A hydroponic experiment was conducted to determine the effects of N and P additions on photosynthesis and chlorophyll fluorescence (ChlF) of seedlings. N and P additions significantly altered photosynthesis and ChlF in the seedlings, but responses of these parameters to the N and P concentrations varied at different developmental stages. The greatest net photosynthetic rate ( ) and actual photochemical efficiency of PSII (Ф) occurred in the treatment of 150.0 mg(N) L and 25.0 mg(P) L addition, whereas the highest maximum quantum yield of PSII (F/F) and water-use efficiency (WUE) were recorded with 150.0 mg(N) L and 15.0 mg(P) L on the 60 day after treatment. Significantly positive correlations of with leaf relative chlorophyll content, transpiration rate, WUE, F/F, and Φ, as well as the Ф with the F/F, were found Our results indicated that an optimal addition of N and P nutrients depends on their coupling effects on the photosynthetic capacity and PSII photochemistry.
在中国，它传统上一直被用作功能性食品。进行了一项水培实验，以确定添加氮和磷对幼苗光合作用和叶绿素荧光（ChlF）的影响。添加氮和磷显著改变了幼苗的光合作用和ChlF，但这些参数对氮和磷浓度的响应在不同发育阶段有所不同。最大净光合速率（ ）和PSII的实际光化学效率（Ф）出现在添加150.0 mg(N) L和25.0 mg(P) L的处理中，而在处理后第60天，PSII的最大量子产率（F/F）和水分利用效率（WUE）最高值出现在添加150.0 mg(N) L和15.0 mg(P) L时。发现 与叶片相对叶绿素含量、蒸腾速率、WUE、F/F和Ф显著正相关，以及Ф与F/F显著正相关。我们的结果表明，氮和磷养分的最佳添加量取决于它们对光合能力和PSII光化学的耦合效应。
