Table 1.

Plant‐mediated reshaping of microbiota composition in response to stresses

Stress	Regulator/genes/key factors	Host	Signals molecules/pathways shaping the microbiota	Effect on the microbiota	Effect of shifted microbiota on the host	References
Not tested	FERONIA	Arabidopsis	Reactive oxygen species (ROS)	Inhibiting fluorescent Pseudomonad colonization	Growth promotion and disease suppressiveness	[27]
Nitrogen deficiency	NRT1.1B	Oryza sativa	Unknown nitrate‐responsive pathways	Maintain the abundance of microbes with ammonification functions	Enhancing nitrogen‐use efficiency	[34]
Nitrogen deficiency	FNSI2	Zea mays	Flavone	Enriching Oxalobacteraceae	Growth promotion under nitrogen starvation	[35]
Iron starvation	MYB72	Arabidopsis	Antimicrobial coumarin (scopoletin)	Selectively inhibiting the soil‐borne fungal pathogens, but not the growth‐promoting Pseudomonas strains, inducing ROS stress in some strains	Not tested	[37]
Iron starvation	F6'H1	Arabidopsis	Coumarin (not related to the antimicrobial activity)	Shifted microbiota composition and stimulated the ability of microbiota to alleviate low‐iron stress in Arabidopsis	Promoting iron uptake, alleviating iron starvation responses in plants	[38]
Phosphate starvation	PHR1	Arabidopsis	PHR1 suppressed expression of immune genes	Shifted microbiota composition	Enhanced phosphate starvation responses	[39]
Phosphate starvation	PHR1, MYBs	Arabidopsis	Indole glucosinolate production	Avoid Colletotrichum tofieldiae overgrowth	Symbiosis and growth promotion	[40]
Phosphate starvation	PHRs	Oryza sativa	PHRs promoted expression of symbiotic genes	Promoted arbuscular mycorrhizal symbiosis	Promoted indirect phosphate uptake via mycorrhizal symbiosis	[41]
Dark (or weak light)	GmSTFs, GmFTs	Glycine max	Light‐induced translocation of GmSTF3/4 and FLOWERING LOCUS T (GmFTs) from shoots to roots	Inhibited nodulation by rhizobia	Decreased nodulation under weak light to save the energy cost of symbiosis	[42]
Suboptimal light (shade)	MYC2, CRYs, BRI	Arabidopsis	JA biosynthesis/signaling, brassinosteroid signal transduction, and cryptochromes	Shifted microbiota composition, enriched multiple Pseudomonas strains	Enhanced growth and immunity under shade	[43]
Drought	Unclear	Sorghumbicoo	Glycerol‐3‐phosphate (G3P)	Monoderm bacteria (especially Actinobacteria)	Root growth promotion under drought	[44]
Drought	Unclear	Oryza sativa	Unclear	Actinobacteria (Streptomyces)	Root growth promotion	[45]