Jasmonate signalling contributes to primary root inhibition upon oxygen deficiency in arabidopsis thaliana

0533144 - ÚEB 2021 RIV CH eng J - Článek v odborném periodiku
Shukla, V. - Lombardi, L. - Pěnčík, Aleš - Novák, Ondřej - Weits, D. A. - Loreti, S. - Perata, P. - Giuntoli, B. - Licausi, F.
Jasmonate signalling contributes to primary root inhibition upon oxygen deficiency in arabidopsis thaliana.
Plants. Roč. 9, č. 8 (2020), s. 1-15, č. článku 1046. E-ISSN 2223-7747
Grant CEP: GA MŠMT(CZ) EF16_019/0000827
Institucionální podpora: RVO:61389030
Klíčová slova: Jasmonate * Oxygen sensing * Root hypoxia * Root meristem
Obor OECD: Biochemistry and molecular biology
Impakt faktor: 3.935, rok: 2020
Způsob publikování: Open access
http://doi.org/10.3390/plants9081046

Plants, including most crops, are intolerant to waterlogging, a stressful condition that limits the oxygen available for roots, thereby inhibiting their growth and functionality. Whether root growth inhibition represents a preventive measure to save energy or is rather a consequence of reduced metabolic rates has yet to be elucidated. In the present study, we gathered evidence for hypoxic repression of root meristem regulators that leads to root growth inhibition. We also explored the contribution of the hormone jasmonic acid (JA) to this process in Arabidopsis thaliana. Analysis of transcriptomic profiles, visualisation of fluorescent reporters and direct hormone quantification confirmed the activation of JA signalling under hypoxia in the roots. Further, root growth assessment in JA-related mutants in aerobic and anaerobic conditions indicated that JA signalling components contribute to active root inhibition under hypoxia. Finally, we show that the oxygen-sensing transcription factor (TF) RAP2.12 can directly induce Jasmonate Zinc-finger proteins (JAZs), repressors of JA signalling, to establish feedback inhibition. In summary, our study sheds new light on active root growth restriction under hypoxic conditions and on the involvement of the JA hormone in this process and its cross talk with the oxygen sensing machinery of higher plants.
Trvalý link: http://hdl.handle.net/11104/0311617