The Anti-Senescence Activity of Cytokinin Arabinosides in Wheat and Arabidopsis Is Negatively Correlated with Ethylene Production
Jazyk angličtina Země Švýcarsko Médium electronic
Typ dokumentu časopisecké články
Grantová podpora
CZ.02.1.01/0.0/0.0/16_019/0000827
Ministerstvo Školství, Mládeže a Tělovýchovy
CZ.02.1.01/0.0/0.0/17_048/0007323
Ministerstvo Školství, Mládeže a Tělovýchovy :
16-04184S
Czech Science Foundation
IGA_PrF_2018_022, IGA_PrF_2020_010
Palacky University Olomouc
PubMed
33143091
PubMed Central
PMC7662598
DOI
10.3390/ijms21218109
PII: ijms21218109
Knihovny.cz E-zdroje
- Klíčová slova
- Arabidopsis, chlorophyll fluorescence, cytokinin derivative, ethylene, oxidative stress, photosystem II, phytohormone, senescence, wheat,
- MeSH
- Arabidopsis účinky léků růst a vývoj metabolismus MeSH
- cytokininy farmakologie MeSH
- ethyleny metabolismus MeSH
- fotosyntéza MeSH
- listy rostlin účinky léků růst a vývoj metabolismus MeSH
- pšenice účinky léků růst a vývoj metabolismus MeSH
- regulátory růstu rostlin farmakologie MeSH
- stárnutí buněk * MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- cytokininy MeSH
- ethylene MeSH Prohlížeč
- ethyleny MeSH
- regulátory růstu rostlin MeSH
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.
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