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

Frontiers in Plant Science

Plant Science

Roman Sobotka¹  Jan Pilný¹  Jana Slivková²  Mária Škrabišová²  Alexandra Husičková³  Zuzana Kučerová³  Martina Špundová³  Radoslav Koprna⁴  Jaroslav Nisler⁵  Danuše Tarkowská⁶  Ondřej Novák⁶  Miroslav Strnad⁶  Stephen Rossall⁷ 

[1] Centre Algatech, Institute of Microbiology, Czech Academy of Sciences, Třeboň, Czechia;Department of Biochemistry, Faculty of Science, Palacký University, Olomouc, Czechia;Department of Biophysics, Faculty of Science, Palacký University, Olomouc, Czechia;Department of Chemical Biology, Faculty of Science, Palacký University, Olomouc, Czechia;Isotope Laboratory, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia;Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences & Palacký University, Olomouc, Czechia;School of Biosciences, Nottingham University, Loughborough, United Kingdom;

关键词: cyclic electron flow;    drought stress;    heat stress;    1-(2-methoxyethyl)-3-(1,2,3-thiadiazol-5yl)urea;    MTU;    photosystem I;    stress tolerance;    wheat;   

DOI  :  10.3389/fpls.2023.1131326

 received in 2022-12-24, accepted in 2023-02-10,  发布年份 2023

来源: Frontiers

【 摘 要 】

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.

【 授权许可】

Unknown   
Copyright © 2023 Nisler, Kučerová, Koprna, Sobotka, Slivková, Rossall, Špundová, Husičková, Pilný, Tarkowská, Novák, Škrabišová and Strnad