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Energies 2017, 10(9), 1370; https://doi.org/10.3390/en10091370

Biomass Production of Three Biofuel Energy Plants’ Use of a New Carbon Resource by Carbonic Anhydrase in Simulated Karst Soils: Mechanism and Capacity

1
Food and Pharmaceutical Engineering Institute, Guiyang University, Guiyang 550005, China
2
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
3
Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education & Jiangsu Province, Institute of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
*
Authors to whom correspondence should be addressed.
Received: 21 June 2017 / Revised: 29 August 2017 / Accepted: 1 September 2017 / Published: 10 September 2017
(This article belongs to the Section Energy Fundamentals and Conversion)
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Abstract

To determine whether the bicarbonate in karst limestone soil could be used as a new carbon resource for biomass production by the catalysis of carbonic anhydrase (CA), a simulative karst drought stress experiment was designed and performed. Three plants used for biofuel energy, Orychophragmus violaceus L. (Ov), Brassica juncea L. (Bj), and Euphorbia lathyris L. (El), were grown under simulated karst drought stress. In response to drought stress, the photosynthesis of the three energy plants was inhibited, but their CA activity increased. The hypothesis was confirmed by plant physiological and stable isotope techniques. The obtained results showed that plant biomass was produced with atmospheric CO2 as well as bicarbonate under drought stress. Bicarbonate use was proportional to the CA activity of the plants. With high CA activity over a long period, El had the highest proportional bicarbonate use compared to Ov and Bj, reaching 26.95%. Additionally, a new method is proposed for the screening of plants grown for energy in karst habitats. View Full-Text
Keywords: bicarbonate; carbonic anhydrases; bicarbonate-use capacity; biomass production; karst drought stress bicarbonate; carbonic anhydrases; bicarbonate-use capacity; biomass production; karst drought stress
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Wang, R.; Wu, Y.; Xing, D.; Hang, H.; Xie, X.; Yang, X.; Zhang, K.; Rao, S. Biomass Production of Three Biofuel Energy Plants’ Use of a New Carbon Resource by Carbonic Anhydrase in Simulated Karst Soils: Mechanism and Capacity. Energies 2017, 10, 1370.

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