Table 1.

Genes and their corresponding functions involved in P starvation or combined abiotic stress tolerance.

Plants	Potential Gene	Family	Abiotic Stress Tolerance	Functions	Reference
Tomato	Lept1 and lept2	Lept	Low Pi	Regulation of P homeostasis	[124]
Glycine max	H12/14 H1/4, PHO1; H5 and H8	PHOSPHATE1 (PHO1)	Low Pi and salt stress	Tolerance against salt stress Morphological adaptation and divergence	[125]
	GmETO1	Ethylene Overproduction Protein	Low Pi	Development of root under Pi starvation and expressed notably for ethylene biosynthesis	[126]
	GmPAP12	GmPAP	Low Pi	Stimulate the purple acid phosphatases synthesis for nodules to absorb more Pi	[127]
	GmSPX-RING1	SPX-RING	Low Pi	Control the efficiency of Pi in different soybean cultivars	[128]
	GmPHR25	GmPT Pi transporter	Low Pi	Upregulated in root hairs to facilitate the absorption of Pi	[129]
Arabidopsis thaliana	microRNA399 and PHR1	PHR1	Low Pi	Regulation of P homeostasis	[130]
Cerasus pseudocerasus	CpERF7	ERF	Drought and low Pi	Stimulate the auxin-mediated stress-responsive genes to increase tolerance against drought and low P	[131]
Hordeum vulgare	HvPIP2;1; HvPIP2;2, HvPIP1;3, HvPIP2;4 and HvPIP2;5	Plasma membrane intrinsic proteins	Drought and low Pi	Encode water channels that facilitate the transit of small solutes and water through cell membrane	[132,133]
	HvPHT1;1, HvPHT1;3, HvPHT1;4, HvPHT1;6,	PHT	Arsenic stress	Reduced the toxicity of arsenic stress	[123]
Tobacco	NtPIN3	Cytoplasmic membrane transporter	Low Pi	Increased tolerance against low Pi by modifying root elongation	[134]
Brassica napus	PHO2	PHO	Low Pi	Enhance the uptake and transportation of Pi in soil	[135]
Leymus chinensis	LcPIP1;1 LcPIP2;1, LcPIP2;4;	Plasma membrane intrinsic proteins	Low Pi and drought stress	PIP genes are overexpressed in drought or Pi starvation, which resulted in alleviation of abiotic stresses	[132]