RT journal article
T1 Phosphate acquisition efficiency in wheat is related to root:shoot ratio, strigolactone levels, and PHO2 regulation
A1 de Souza Campos, Pedro M.
A1 Cornejo, Pablo
A1 Rial Cumbrera, Carlos
A1 Borie, Fernando
A1 Varela Montoya, Rosa María
A1 Seguel, Alex
A1 Lopez Ráez, Juan Antonio
A2 Química Orgánica
K1 P signalling
K1 phosphate starvation responses
K1 phosphate transporters
K1 root traits
K1 strigolactones
K1 wheat
AB Inorganic phosphorus (Pi) fertilizers are expected to become scarce in the near future; so, breeding for improved Pi acquisition-related root traits would decrease the need for fertilizer application. This work aimed to decipher the physiological and molecular mechanisms underlying the differences between two commercial wheat cultivars (Crac and Tukan) with contrasting Pi acquisition efficiencies (PAE). For that, four independent experiments with different growth conditions were conducted. When grown under non-limiting Pi conditions, both cultivars performed similarly. Crac was less affected by Pi starvation than Tukan, presenting higher biomass production, and an enhanced root development, root:shoot ratio, and root efficiency for Pi uptake under this condition. Higher PAE in Crac correlated with enhanced expression of the Pi transporter genes TaPht1;2 and TaPht1;10. Crac also presented a faster and higher modulation of the IPS1–miR399–PHO2 pathway upon Pi starvation. Interestingly, Crac showed increased levels of strigolactones, suggesting a direct relationship between this phytohormone and plant P responses. Based on these findings, we propose that higher PAE of the cultivar Crac is associated with an improved P signalling through a fine-tuning modulation of PHO2 activity, which seems to be regulated by strigolactones. This knowledge will help to develop new strategies for improved plant performance under P stress conditions.
YR 2019
FD 2019-10
LK http://hdl.handle.net/10498/33419
UL http://hdl.handle.net/10498/33419
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026