Urea derivative MTU improves stress tolerance and yield in wheat by promoting cyclic electron flow around PSI.

Autor: Nisler J; Isotope Laboratory, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia., Kučerová Z; Department of Biophysics, Faculty of Science, Palacký University, Olomouc, Czechia., Koprna R; Department of Chemical Biology, Faculty of Science, Palacký University, Olomouc, Czechia., Sobotka R; Centre Algatech, Institute of Microbiology, Czech Academy of Sciences, Třeboň, Czechia., Slivková J; Department of Biochemistry, Faculty of Science, Palacký University, Olomouc, Czechia., Rossall S; School of Biosciences, Nottingham University, Loughborough, United Kingdom., Špundová M; Department of Biophysics, Faculty of Science, Palacký University, Olomouc, Czechia., Husičková A; Department of Biophysics, Faculty of Science, Palacký University, Olomouc, Czechia., Pilný J; Centre Algatech, Institute of Microbiology, Czech Academy of Sciences, Třeboň, Czechia., Tarkowská D; Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences & Palacký University, Olomouc, Czechia., Novák O; Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences & Palacký University, Olomouc, Czechia., Škrabišová M; Department of Biochemistry, Faculty of Science, Palacký University, Olomouc, Czechia., Strnad M; Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences & Palacký University, Olomouc, Czechia.
Jazyk: angličtina
Zdroj: Frontiers in plant science [Front Plant Sci] 2023 Mar 07; Vol. 14, pp. 1131326. Date of Electronic Publication: 2023 Mar 07 (Print Publication: 2023).
DOI: 10.3389/fpls.2023.1131326
Abstrakt: Increasing crop productivity under optimal conditions and mitigating yield losses under stressful conditions is a major challenge in contemporary agriculture. We have recently identified an effective anti-senescence compound (MTU, [1-(2-methoxyethyl)-3-(1,2,3-thiadiazol-5yl)urea]) in in vitro studies. Here, we show that MTU delayed both age- and stress-induced senescence of wheat plants ( Triticum aestivum L.) by enhancing the abundance of PSI supercomplex with LHCa antennae (PSI-LHCa) and promoting the cyclic electron flow (CEF) around PSI. We suppose that this rarely-observed phenomenon blocks the disintegration of photosynthetic apparatus and maintains its activity as was reflected by the faster growth rate of wheat in optimal conditions and under drought and heat stress. Our multiyear field trial analysis further shows that the treatment with 0.4 g ha -1 of MTU enhanced average grain yields of field-grown wheat and barley ( Hordeum vulgare L.) by 5-8%. Interestingly, the analysis of gene expression and hormone profiling confirms that MTU acts without the involvement of cytokinins or other phytohormones. Moreover, MTU appears to be the only chemical reported to date to affect PSI stability and activity. Our results indicate a central role of PSI and CEF in the onset of senescence with implications in yield management at least for cereal species.
Competing Interests: Authors of this manuscript JN, RK, and MSt are co-authors of the following patents CZ305649B6; CA2991519C; US9993002B2; WO2016037595A1; ZA201701338B, which claims protection for MTU and/or related compounds and their use as plant growth regulators. The Laboratory of Growth Regulators collaborates with IntraCrop Ltd. on research into the effects of MTU on the growth and grain yield of agricultural crops. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
(Copyright © 2023 Nisler, Kučerová, Koprna, Sobotka, Slivková, Rossall, Špundová, Husičková, Pilný, Tarkowská, Novák, Škrabišová and Strnad.)
Databáze: MEDLINE