Combined effects of lanthanum (III) chloride and acid rain on photosynthetic parameters in rice.
作者： Lihong Wang , Wen Wang , Qing Zhou , Xiaohua Huang
DOI: 10.1016/J.CHEMOSPHERE.2014.04.069
关键词: Lanthanum 、 Hill reaction 、 Carboxylation 、 Lanthanum(III) chloride 、 Photosynthesis 、 Acid rain 、 Chloride 、 Horticulture 、 Chemistry 、 Salt (chemistry) 、 Agronomy
摘要: Rare earth elements (REEs) pollution and acid rain are environmental issues, their deleterious effects on plants attract worldwide attention. These two issues exist simultaneously in many regions, especially some rice-growing areas. However, little is known about the combined of REEs plants. Here, lanthanum chloride (LaCl3), one type REE salt, photosynthesis rice were investigated. We showed that treatment 81.6 μM LaCl3 at pH 4.5 increased net photosynthetic rate (Pn), stomatic conductance (Gs), intercellular CO2 concentration (Ci), Hill reaction activity (HRA), apparent quantum yield (AQY) carboxylation efficiency (CE) rice. The 3.5 began to behave toxic (decreasing Pn, Gs, HRA, AQY CE, increasing Ci), maximally observed 2449.0 2.5. Moreover, depended growth stage rice, with maximal occurring booting stage. Furthermore, high-concentration low-pH had more serious than or alone. Finally, effect Pn resulted from changes (Gs, Ci) non-stomatic (HRA, CE) factors.
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