Burr marigold ( Bidens tripartita L.) roots directly and immediately scavenge rhizosphere methane with highly exuded hyd
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Burr marigold (Bidens tripartita L.) roots directly and immediately scavenge rhizosphere methane with highly exuded hydrogen peroxide via a rhizosphere ?Fenton reaction Tadao Wagatsuma & Kazuhiro Tanaka & Yuuichirou Iino & Tsuyoshi Satou & Md. Shahadat Hossain Khan & Keitaro Tawaraya Received: 27 January 2020 / Accepted: 5 November 2020 # Springer Nature Switzerland AG 2020
Abstract Aims The major factors controlling the soil methane (CH4) concentration and CH4 emissions of various plant (mainly wetland) species were identified. Methods Five plant species (Oryza sativa, Zizania latifolia, Phragmites australis, Sesbania cannabina, and Bidens tripartita) were separately cultivated under the flooded soil conditions. The direct CH4 scavenging potential of B. tripartita roots was also measured in conjunction with in vitro CH4 scavenging experiments using H2O2 and several transition metal ions. Results CH4 emissions from the soil-cultivated plants did not depend on the maximum CH4 emission potential for each plant species but on the soil CH4 concentrations, which were positively correlated with the CH4 production potential of the soil and negatively correlated with soil Eh values. Bidens tripartita roots possessed the highest increasing soil Eh potential and a direct, immediate, and continuous CH4 scavenging potential via the
Fenton reaction using a considerably high concentration of root apoplastic H2O2 and rhizosphere Fe2+. Conclusions Bidens tripartita presented the highest soil Eh ascending potential. The in vitro experiments suggested the involvement of・OH/FeIVO2+ via the newly termed rhizosphere Fenton reaction as a strong destructive power for CH4. To our knowledge, this is the first report on direct CH4 scavenging by high H2O2-exuding plant roots. Keywords Bidens tripartita . Fenton reaction . Hydrogen peroxide (H2O2) . Methane (CH4) Abbreviations α-NA α-naphthylamine Eh Oxidation-reduction potential FeIVO2+ Ferryl ion OH Hydroxyl radical
Responsible Editor: Paul Bodelier. T. Wagatsuma (*) : K. Tanaka : Y. Iino : T. Satou : K. Tawaraya Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997, Japan e-mail: [email protected]
K. Tanaka e-mail: [email protected] Y. Iino e-mail: [email protected]
T. Satou e-mail: [email protected] K. Tawaraya e-mail: [email protected] M. S. H. Khan HMD Science and Technology University, Dinajipur, 5200 Basherhat, Bangladesh e-mail: [email protected]
Plant Soil
Introduction Methane (CH4) is the second most important anthropogenic greenhouse gas (Bridgham et al. 2013). The greatest CH4 emissions occur in wetlands; however, there is a great deal of uncertainty with regard to the CH4 budgets of these ecosystems (Bridgham et al. 2013; Kirschke et al. 2013; Saunois et al. 2016; Maasakkers et al. 2019). From 2014 to the end of 2018, the amount of CH4 in the atmosphere has increased to nearly double that of what was observed in 2007 (Fletcher and Schaefer 2019). The most recent data has indic
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