Mechanism of Agarwood Formation under the Induction of Both Inorganic Salts and Hormones

【Objective】This study explored the effects of different combinations of inorganic salts and hormones induced to agarwood and its mechanisms in Aquilaria sinensis,with the aim to effectively promote agarwood formation.【Method】Uniform test design was used to deal with ten-year-old trees.NaCl,FeSO4,CaCl2,methyl jasmonate and ethephon were selected as the induction factors,and each factor covered 3 levels,totally 5 induction treatments.The content of starch,soluble sugar,alcohol soluble extract and the discoloration range of stem wood were determined,and histochemical and inclusion changes were,respectively,observed by optical microscopy and scanning electron microscope（SEM） through wood core samples that taken 0.5,1,3,6,10 months after treated.【Result】1) With the increase of induction time,the content of starch firstly decreased and then increased,and the time to reach to the lowest value was different between different treatments.While the content of soluble sugar was opposite,which firstly increased and then d