A group from College of Agronomy, Sichuan Agricultural University, Chengdu, China, etc. has reported that Titanium (Ti) foliar application increases Phosphorus (P) uptake through in root auxin content and photosynthetic efficiency.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8631872/
Under normal light (NL), photosynthetic Rate increased significantly in response to T2 (14.06%) and T3 (30.46%) against T0 (control) in High P condition, whereas in Low P condition, a significant increase was recorded in T2 (21.98%), T3 (38.81%), and T4 (21.43%) as compared to control, where T0, T1, T2, T3 and T4 mean different concentrations of Ti (T0 = 0, T1 = 125, T2 = 250, T3 = 500 and T4 = 1,000 mg/L), and high P (HP) = 100 mg/kg and low P (LP) = 10 mg/kg.
It was found that the increase in root growth traits such as root hairs, root length, lateral root formation and root surface area was associated with root auxin content. This increase in the morphological characteristics of roots due to the Auxin content significantly improved the efficiency of nutrient absorption, for example P.
Effect of Ti application on (A) root length, (B) root surface area, (C) root volume, and (D) root diameter of soybean under NL and shade (SC) combined with Low P and High P conditions.