Table 2.

Effect of overexpression of phytocytokines or their precursors.

Plan Species of Origin	Peptide/Precursor	Recipient Plant/Organism	Effect	References
Arabidopsis	PROPEP1	Arabidopsis	Resistance to Pythium irregulare and Pseudomonas syringae	[11]
Arabidopsis	PrePIP1	Arabidopsis	Resistance to foc 699	[14]
Arabidopsis	SCOOP	Arabidopsis	Resistance to Alternaria brassicicola	[16]
			Susceptibility against E. amylovora	[21]
Arabidopsis	RALF23	Arabidopsis	Susceptibility to Pto DC3000 COR and P. cucumerina	[23]
Arabidopsis	IDL6	Arabidopsis	Susceptibility to P. syringae Pst DC3000	[24]
Arabidopsis	GRI	Arabidopsis	Susceptibility to P. syringae Pst DC3000	[25,26]
Arabidopsis	CEP4	Arabidopsis	Resistance to P. syringae Pto	[27]
Tomato	ProSystemin	Tomato	Resistance to herbivore	[80]
			Resistance to aphids	[80]
			Resistance to B. cinerea and A. alternata	[80]
			Reduced susceptibility to Cucumber mosaic virus	[81]
Tomato	ProSystemin	Arabidopsis	Resistance to B. cinerea	[86]
Tomato	PSK	Arabidopsis	Susceptibility to Fusarium oxysporum	[34]
Arabidopsis	PSK	Tomato	Botrytis cinerea	[35]
Maize	Zip1	Ustilago maydis	Resistance against Ustilago maydis	[37]
Tobacco	HypSys	Tobacco	Resistance to Helicovera armigera	[82]