Rice auxin influx carrier OsAUX1 facilitates root hair elongation in response to low external phosphate

• DOI: 10.1038/s41467-018-03850-4
• Publication Date: 2018-04-11T14:16:09Z
• Authors: Jitender Giri; Rahul Bhosale; Guoqiang Huang; Bipin K. Pandey; Helen Parker; Susan Zappala; Jing Yang; Anne Dievart; Charlotte Bureau; Karin Ljung; Adam Price; Terry Rose; Antoine Larrieu; Stefan Mairhofer; Craig J. Sturrock; Philip White; Lionel Dupuy; Malcolm Hawkesford; Christophe Perin; Wanqi Liang; Benjamin Peret; Charlie T. Hodgman; Jonathan Lynch; Matthias Wissuwa; Dabing Zhang; Tony Pridmore; Sacha J. Mooney; Emmanuel Guiderdoni; Ranjan Swarup; Malcolm J. Bennett
• Keywords: Root hair; Elongation; Gravitropism; Rice plant; Apex (geometry)

Root traits such as root angle and hair length influence resource acquisition particularly for immobile nutrients like phosphorus (P). Here, we attempted to modify in rice by disrupting the OsAUX1 auxin influx transporter gene an effort improve P efficiency. We show X-ray microCT imaging that is altered osaux1 mutant, causing preferential foraging top soil where normally accumulates, yet surprisingly, efficiency does not improve. Through closer investigation, reveal also promotes elongation response limitation. Reporter studies increases zone low environments. demonstrate functions mobilize from apex differentiation this signal when roots encounter external P. conclude play key roles promoting rice.