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《Journal of Northeast Forestry University》 2009-05
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Relationship between Resistance of Poplar to Saperda populnea and Tannin Content

Sun Shouhui,Li Wei(College of Forestry,Shenyang Agricultural University,Shenyang 110161,P.R.China);Jin Xin,Du Yaying,Lü Changli(Northeast Normal University)  
An experiment was conducted to measure tannin contents in xylem and phloem of six poplar strains in order to study the relationships between tannin content and host selectivity,larva development of Saperda populnea Linnaeus.Results showed that the tannin content in the phloem of different poplar strains was higher than that in the xylem during May and October,but the difference was not obvious.The tannin contents were higher in xylem and phloem during July and August and were the lowest in May(except the xylem of Populua nigra var.italica × P.cathayana and the phloem of P.× euramericana CL.'74/76').A significant difference in tannin content in phloem was found in each month.The tannin content of P.nigra var.italica× P.cathayana in xylem or phloem was obviously higher than that of other strains,while that of P.deltoides × P.cathayana in phloem and P.alba var.pyramidalis in xylem were significantly lower than that of other stains.Field bioassay in an experimental forest was conducted to study the host selectivity and larvae development of S.populnea to six strains of poplars.It was concluded that the larvae development for different poplar strains exhibited P.deltoides ×P.cathayanaP.× euramericana cv."N3930"P.× euramericana CL.'74/76' P.nigra var.italica× P.cathayanaP.alba var.pyramidalis P.alba × P.berolinensis.There was no obvious correlation between total tannin content in xylem and larvae growth of S.populnea.The oviposition density showed Populua nigra var.italica × P.cathayanaP.× euramericana CL.'74/76'P.deltoids ×P.cathayanaP.× euramericana cv."N3930" P.alba × P.berolinensisP.alba var.pyramidalis,and there was no direct relationship between tannin content in phloem and oviposition in May,indicating that the tannin content in branch xylem of various poplar strains may be not the key factor affecting parasitism.
【Fund】: 国家自然科学基金(30400342);; 东北师范大学分析测试基金资助
【CateGory Index】: S763.7
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