RT journal article
T1 Strigolactones: New players in the nitrogen-phosphorus signalling interplay
A1 Marro, Nicolás
A1 Lidoy, Javier
A1 Chico, María Ángeles
A1 Rial Cumbrera, Carlos
A1 García, Juan
A1 Varela Montoya, Rosa María
A1 Macías Domínguez, Francisco Antonio
A1 Pozo, Maria J.
A1 Janoušková, Martina
A1 López‐Ráez, Juan A.
A2 Química Orgánica
K1 nitrate starvation
K1 nutrient deficiency
K1 phosphate starvation
K1 tomato
AB Nitrogen (N) and phosphorus (P) are among the most important macronutrients for plant growth and development, and the most widely used as fertilizers. Understanding how plants sense and respond to N and P deficiency is essential to optimize and reduce the use of chemical fertilizers. Strigolactones (SLs) are phytohormones acting as modulators and sensors of plant responses to P deficiency. In the present work, we assess the potential role of SLs in N starvation and in the N-P signalling interplay. Physiological, transcriptional and metabolic responses were analysed in wild-type and SL-deficient tomato plants grown under different P and N regimes, and in plants treated with a short-term pulse of the synthetic SL analogue 2 '-epi-GR24. The results evidence that plants prioritize N over P status by affecting SL biosynthesis. We also show that SLs modulate the expression of key regulatory genes of phosphate and nitrate signalling pathways, including the N-P integrators PHO2 and NIGT1/HHO. The results support a key role for SLs as sensors during early plant responses to both N and phosphate starvation and mediating the N-P signalling interplay, indicating that SLs are involved in more physiological processes than so far proposed.
PB WILEY
SN 0140-7791
YR 2022
FD 2022-02
LK http://hdl.handle.net/10498/26217
UL http://hdl.handle.net/10498/26217
LA eng
NO This work was supported by grants RTI2018-094350-B-C31 from the Spanish National R&D Plan of the Ministry of Science, Innovation and Universities (MICIU) and the European Regional Development Fund (ERDF) 'a way a making Europe'. JL was supported by PhD fellowship BES-2016-077850. The contribution of NM and MJ was supported by the Research Development Programme RVO67985939 of Czech Academy of Sciences. We thank Dr Koichi Yoneyama and Dr Xiaonan Xie (Weed Science Centre, Utsunomiya University, Japan) for kindly providing the natural SLs used to set up their analytical quantification and the synthetic SL analogue 2-epi-GR24. We also thank Dr Harro Bouwmeester (Faculty of Science, University of Amsterdam) for the seeds of the SL-deficient line SlCCD8-RNAi L09. We acknowledge the Scientific Instrumentation Service (SIC) and Nitrogen/Carbon Analysis Service (SANC) of the EEZ-CSIC for technical support in the nutrient analysis.
DS Repositorio Institucional de la Universidad de Cádiz
RD 09-may-2026