Low Nocturnal Temperature Alters Tomato Foliar and Root Phosphorus Fractions Allocation by Reducing Soil Phosphorus Availability

Low nocturnal temperature (LNT) is a major constraint for protected tomato production in China during winter and spring, which leads to phosphorus (P) deficiency symptoms. The soil P fractions reflect availability. foliar root the adaptation strategies of tomatoes LNT. However, relationship between plant under LNT not well understood. Therefore, we conducted 40-day indoor incubation experiment with four temperatures (15, 12, 9 6 °C). Tomato growth status, were determined. Then, structural equation model (SEM) was used analyze direct and/or indirect effects on fractions, shoot dry weight (SDW). results showed that decreased availability by decreasing labile increasing moderately P. inorganic P, metabolite nucleic acid residual °C. lipid decreased, while increased fraction allocation directly influenced increase decline SDW decrease In conclusion, affects reducing availability, limits matter tomatoes.