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Article

The Anti-Senescence Activity of Cytokinin Arabinosides in Wheat and Arabidopsis Is Negatively Correlated with Ethylene Production

1
Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-78371 Olomouc, Czech Republic
2
Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany AS CR, Šlechtitelů 27, CZ-78371 Olomouc, Czech Republic
3
Department of Chemical Biology and Genetics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-78371 Olomouc, Czech Republic
4
Department of Botany, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-78371 Olomouc, Czech Republic
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(21), 8109; https://doi.org/10.3390/ijms21218109
Received: 15 October 2020 / Revised: 26 October 2020 / Accepted: 28 October 2020 / Published: 30 October 2020
Leaf senescence, accompanied by chlorophyll breakdown, chloroplast degradation and inhibition of photosynthesis, can be suppressed by an exogenous application of cytokinins. Two aromatic cytokinin arabinosides (6-benzylamino-9-β-d-arabinofuranosylpurines; BAPAs), 3-hydroxy- (3OHBAPA) and 3-methoxy- (3MeOBAPA) derivatives, have recently been found to possess high anti-senescence activity. Interestingly, their effect on the maintenance of chlorophyll content and maximal quantum yield of photosystem II (PSII) in detached dark-adapted leaves differed quantitatively in wheat (Triticum aestivum L. cv. Aranka) and Arabidopsis (Arabidopsisthaliana L. (Col-0)). In this work, we have found that the anti-senescence effects of 3OHBAPA and 3MeOBAPA in wheat and Arabidopsis also differ in other parameters, including the maintenance of carotenoid content and chloroplasts, rate of reduction of primary electron acceptor of PSII (QA) as well as electron transport behind QA, and partitioning of absorbed light energy in light-adapted leaves. In wheat, 3OHBAPA had a higher protective effect than 3MeOBAPA, whereas in Arabidopsis, 3MeOBAPA was the more efficient derivative. We have found that the different anti-senescent activity of 3OHBAPA and 3MeOBAPA was coupled to different ethylene production in the treated leaves: the lower the ethylene production, the higher the anti-senescence activity. 3OHBAPA and 3MeOBAPA also efficiently protected the senescing leaves of wheat and Arabidopsis against oxidative damage induced by both H2O2 and high-light treatment, which could also be connected with the low level of ethylene production. View Full-Text
Keywords: cytokinin derivative; ethylene; senescence; chlorophyll fluorescence; wheat; Arabidopsis; phytohormone; oxidative stress; photosystem II cytokinin derivative; ethylene; senescence; chlorophyll fluorescence; wheat; Arabidopsis; phytohormone; oxidative stress; photosystem II
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MDPI and ACS Style

Kučerová, Z.; Rác, M.; Mikulík, J.; Plíhal, O.; Pospíšil, P.; Bryksová, M.; Sedlářová, M.; Doležal, K.; Špundová, M. The Anti-Senescence Activity of Cytokinin Arabinosides in Wheat and Arabidopsis Is Negatively Correlated with Ethylene Production. Int. J. Mol. Sci. 2020, 21, 8109. https://doi.org/10.3390/ijms21218109

AMA Style

Kučerová Z, Rác M, Mikulík J, Plíhal O, Pospíšil P, Bryksová M, Sedlářová M, Doležal K, Špundová M. The Anti-Senescence Activity of Cytokinin Arabinosides in Wheat and Arabidopsis Is Negatively Correlated with Ethylene Production. International Journal of Molecular Sciences. 2020; 21(21):8109. https://doi.org/10.3390/ijms21218109

Chicago/Turabian Style

Kučerová, Zuzana, Marek Rác, Jaromír Mikulík, Ondřej Plíhal, Pavel Pospíšil, Magdaléna Bryksová, Michaela Sedlářová, Karel Doležal, and Martina Špundová. 2020. "The Anti-Senescence Activity of Cytokinin Arabinosides in Wheat and Arabidopsis Is Negatively Correlated with Ethylene Production" International Journal of Molecular Sciences 21, no. 21: 8109. https://doi.org/10.3390/ijms21218109

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