Table 1.

Description of each treatment in this study

Treatment	Leonard jar system
	Lower part	Upper part
15S	P-free NS	400 g of substrate + 2 g of Ca3(PO4)2 Inoculation by pipetting 1 ml of bacterial biostimulant Enterobacter sp. 15S (108 cells ml−1) onto the seedlings at the rooting site
Ci	P-free NS supplemented with 1 mM citric acid	400 g of substrate + 2 g of Ca3(PO4)2
Fu	P-free NS supplemented with 1 mM fumaric acid
Ke	P-free NS supplemented with 12 mM α-ketoglutaric acid
Ma	P-free NS supplemented with 7 mM malic acid
Ox	P-free NS supplemented with 2 mM oxalic acid
Mix	P-free NS supplemented with 1 mM citric acid + 1 mM fumaric acid + 12 mM α-ketoglutaric acid + 7 mM malic acid + 2 mM oxalic acid
Control P-	P-free NS
Control P +	P-full NS (KH2PO4 0.1% P w/v)	400 g of substrate