关键词: 茶树, 挥发物, 茉莉酸, 茉莉酸甲酯, 水杨酸, 水杨酸甲酯, 外源诱导

Abstract: To compare the tea plant volatiles induced by jasmonates or salicylates elicitors，four elicitors including jasmonic acid（JA），methyl jasmonate（MeJA），salicylic acid（SA）and methyl salicylate（MeSA），were respectively sprayed on tea plants，and tea plant volatiles were collected and analyzed by dynamic headspace technique and gas chromatography-mass spectrometer，respectively. The four elicitors could increase the emission amount and component number of tea plant volatiles. The control tea plant only released two compounds，and the emission amount was lower than 0.01 ng ? h-1 ? g-1. JA could induce nine volatile compounds，and the total emission amount could be up to 4.37 ng ? h-1 ? g-1，of which terpenes and aromatic compounds，such as (E)-β-ocimene，(E)-4,8-dimethyl-1,3,7-nonatriene（DMNT）and benzeneacetaldehyde，accounted for more than 80%. MeJA could induce twenty-seven volatile compounds，and the total amount could be up to 95.41 ng ? h-1 ? g-1，of which only terpenes，such as (E)-β- ocimene，DMNT and (E,E)-α-farnesene，accounted for more than 80%. Three aromatic components，including anisole，phenol and MeSA，could be induced by SA. Emission amount of the three compounds could be up to 191.21 ng ? h-1 ? g-1，of which MeSA made up more than 90%. MeSA was the only component of the volatiles induced by MeSA，and the emission amount of MeSA could be up to 507.5 ng ? h-1 ? g-1. By increasing the concentration of applied elicitors，the emission amount of main components or the component number of the induced volatiles were increased. The principal component analysis and hierarchical cluster analysis showed that the scores of the induced volatiles were significantly different among the four elicitors，but the volatiles induced by JA and MeJA and those induced by SA and MeSA were clustered into one class，respectively. In conclusion，exogenously application of JA，MeJA，SA and MeSA could remarkably increase the emission of tea plant volatiles，the volatiles induced by jasmonates and salicylates elicitors were distinctly different，but the volatiles induced by the same kind of elicitors were similar. It is of great significance to research the physiological mechanism and anti-herbivores function of tea plants induced by JAs and SAs.

Key words: tea plant, volatile, jasmonic acid, methyl jasmonate, salicylic acid, methyl salicylate, exogenous induction