Component Analysis of Volatile Compounds Released from cotton Induced by Aphis gossypii and Methyl Jasmonate

Key Words：cotton; Aphis gossypii; methyl jasmonate; honeydew of cotton aphids; volatile

Abstract：Volatile compounds of cotton from the leaves uninfected and infested leaves by Aphis gossypii , mixture of aphids and infested leaves, treated leaves by methyl jasmonate, aphids honey dew and its own volatile compounds were extracted and analyzed by solid-phase microextraction (SPME) and gas chromatography mass spectrometry (GC-MS). It showed that there were 27 species of compounds found. Seven of them, including α-Pinene, β-Pinene, β-Caryophyllene, Pentadecane, Hexadecane, Heptadecane, -Cyclohexen-1-ol, 1-(1,5-dimethyl-4-hexenyl)-4-methyl- were detected in volatiles of cotton leaves uninfected and infested by A. gossypii. mixture of aphids and infested leaves, and cotton leaves treated by methyl jasmonate. α-Phellandrene, α-Caryophyllene, α-Farnesene, 2,6,10-trimethyl-pentadecane, (E,Z)-2,6-dimethyl-2, 4,6-octatriene, Anthracene, 2,6,10,14-tetramethyl-pentadecane, Diphenol-propane were detected in volatiles of cotton leaves infested by A. gossypii, and of mixture of aphids and infested leaves. 3-Carene, (E)-β-Farnesene were only detected in volatiles from cotton leaves infested by A. gossypii and treated by methyl jasmonate. Nonanal, Decanal, Tetradecane, Pentadecane, Hexadecane, Heptadecane could be detected in cotton aphid and its honeydew, but 1-methoxy-4-[(Z)-1- propenyl] benzene, (Z)-β-Farnesene, Phenanthrene only in aphid honeydew and 5,9-Undecadien-2-one, 6,10-dimethyl- only in cotton aphid. This research laid a foundation for further study of natural enemy insect attraction from volatile of cotton and A. gossypii.