Table 1.

Transcription factors regulating ACS and ACO under abiotic stress.

S.No.	Plant	Transcription Factor	Gene Targeted	Up/Downregulated	Plant Organ	Plant Response under Abiotic Stress	Reference
1.	Arabidopsis	AtMYB30	AtACS7	Down	Root and Leaves	Ethylene synthesis reduced, leading to submergence tolerance	[39]
		EcAGL	AtACS2	Down	Leaves	Reduce ethylene synthesis, thus enhancing Cd-tolerance by inhibiting Cd-transport from root to shoot.	[40]
		AtWRKY33	AtACS2, AtACS6	Up	Leaves	Enhanced ethylene synthesis resulting in salt tolerance	[41]
		AtSHYG	AtACO5	Up	Leaf petiole	Enhanced ethylene synthesis leading to rapid petiole cell expansion and hyponastic leaf movement	[42]
2.	Malus domestica	MdERF1B	MdACS1, MdACO1	Up	Leaves	Enhanced ethylene production leading to cold tolerance	[43]
3.	Oryza sativa	ERF109	ACS6, ACO2	Down	Leaves	Reduce ethylene production and enhance drought tolerance	[44]
4.	Poncirus trifoliata	PtrERF9	PtrACS1	Up	Leaves	Feedback regulation of ethylene to orchestrate cold stress response	[33]
5.	Triticum aestivum	TaMYC8-TaERF6	TaACS, TaACO	Down	Root	Ethylene production decrease, leading to Cd-tolerance	[45]
		TabHLH094-TaMYC8	TaACS, TaACO	Down	Root and leaves	Ethylene synthesis decreases, leading to reduced uptake of Cd into roots	[46]