Effect of Methyl Jasmonate on Phytoalexins Biosynthesis and Induced Disease Resistance to Fusarium oxysporum f. sp. Vasinfectum in Cotton (Gossypium hirsutum L.)

Table 1

Effect of concentration and timing of methyl jasmonate (MeJA) treatments on phenolic content in cotton leaves.

MeJA concentration (mM)	Incubation time; (h)	Total phenolic contents; (mg/g FDE)
0	24	20.50 ± 0.51^a
	48	26.75 ± 0.45^b
	72	34.25 ± 0.25^c
2.5	24	44.20 ± 0.90^d
	48	46.50 ± 0.25^d
	72	54.00 ± 1.05^e
5	24	46.75 ± 0.26^d
	48	70.50 ± 0.25^f
	72	78.75 ± 0.85^g
10	24	53.15 ± 0.80^e
	48	68.75 ± 0.22^f
	72	71.50 ± 1.08^f
15	24	55.50 ± 0.56^e
	48	44.50 ± 0.55^d
	72	38.75 ± 0.25^c
20	24	40.20 ± 0.20^cd
	48	38.15 ± 0.15^c
	72	23.50 ± 0.35^a

FDE: freeze-dried extract; data are expressed as mean of three replicates; ±SD: standard deviation; means followed by a different letter are significantly different according to Duncan’s multiple range test at P = 0.05 level.