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Does bicarbonate affect the nitrate utilization and photosynthesis of Orychophragmus violaceus?
Ye Lu;  Yanyou Wu;  Kaiyan Zhang
2018
发表期刊Acta Geochim
卷号37期号:6页码:875–885
摘要

The effect of bicarbonate (HCO3 -) on the growth and development of plants varies by species. To better understand inorganic carbon and nitrogen assimilation changes of karst-adaptable plants under different HCO3 - treatments, we conducted experiments on seedlings and in vitro plantlets of Orychophragmus violaceus (Ov). We found that the vital photosynthesis potential (as measured by net photosynthetic rate, actual photochemical efficiency of photosystem-II, photochemical quenching coefficient, and the instantaneous carbon isotope ratio of 3-phosphoglycerate) was consistent under different HCO3 - treatments of Ov. Bicarbonate’s lack of effect on carbon assimilation of Ov may be related to carbonic anhydrase in Ov converting HCO3 - to H2O and CO2. In this way, Ov could prevent HCO3 - ion toxicity and high pH from harming its growth and development under HCO3 - stress. This study also found that high HCO3 - concentrations could promote nitrogen assimilation and utilization of Ov through changes in related indexes (foliar nitrogen isotope fractionation ratio, stable nitrogen isotope assimilation ratio, foliar stable nitrogen isotope fractionation, nitrate nitrogen utilization efficiency, and nitrate utilization share) under different HCO3 - treatments. Bicarbonate has different effects on photosynthesis and on inorganic nitrogen assimilation of Ov, which may be connected to photosynthesis providing electrons for nitrate/nitrite reduction through the photosynthetic chain.

关键词Nitrogen Assimilation photosynthetic Capacity hco3 - Orychophragmus Violaceus
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/10446
专题环境地球化学国家重点实验室
作者单位1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
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Ye Lu;Yanyou Wu;Kaiyan Zhang. Does bicarbonate affect the nitrate utilization and photosynthesis of Orychophragmus violaceus?[J]. Acta Geochim,2018,37(6):875–885.
APA Ye Lu;Yanyou Wu;Kaiyan Zhang.(2018).Does bicarbonate affect the nitrate utilization and photosynthesis of Orychophragmus violaceus?.Acta Geochim,37(6),875–885.
MLA Ye Lu;Yanyou Wu;Kaiyan Zhang."Does bicarbonate affect the nitrate utilization and photosynthesis of Orychophragmus violaceus?".Acta Geochim 37.6(2018):875–885.
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