Acknowledgements
The authors are very grateful to María del Puerto Sánchez-Iglesias for her technical assistance on hormonal analysis. Research was also supported by the Spanish MINECO-FEDER (project RTI2018-099113-B-I00) and by the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement # 289365 (project ROOTOPOWER). AJT was partly supported by BBSRC (grant BB/L01954X/1) and MLG was partly supported by BBSRC (grant BB/H109502/1).