马尾松不同种源氨基酸含量与抗松材线虫病的关系  

Studies on the Relationship of Amino Acid Content of Different Masson Pine Provenances and Their Resistanceto Pine Wood Nematode (PWN)

作　　者：徐福元[1,2,3] 葛明宏[1,2,3] 赵振东 朱克恭[1,2,3] 

机构地区：[1]江苏省林业科学研究所 [2]中国林业科学研究院林产化学工业研究所 [3]南京林业大学

出　　处：《林业科学研究》1998年第3期313-318,共6页Forest Research

基　　金：国家自然科学基金

摘　　要：在选出和验证抗病马尾松种源的基础上，研究了马尾松不同抗病性种源的树体内氨基酸含量的差异。结果表明，抗病种源在接种松材线虫前后均比较感种源含有较少的组氨酸、苏氨酸、甘氨酸、异亮氨酸、胱氨酸、甲硫氨酸、亮氨酸、酪氨酸和精氨酸等９种游离氨基酸。它们与感病指数均呈正相关，这说明游离氨基酸含量低的马尾松种源抗松材线虫病。１１种固态氨基酸的含量与感病指数有负相关性，说明其含量较高的种源具较强抗病性能。On the basis of selected and tested resistance of masson pine (Pinus massoniana) provenances,and external symptoms of resistant difference of masson pine provenances,GX2(H),SC2(M),SX1(L) and black pine(S) (P.thunbergii) resistant to PWN (Bursaphelenchus xylophilus) were observed.The resistant provenance GX2 was stable (IR=100.0).However,those of the other provenances SC2,SX1 and black pine varied (IR=60.0,40.0 and 0 respectively).Comparing with SC2,SX1 and black pine,the resistant factors in wood of GX2 were analysed and the results showed that:the factor that less sucking stimulatory of free amino acid (including His,Thre,Gly,Ile,Glu,Cys,Meth,Leu,Tyr,Try and Arg) existed in the wood of GX2 indicated it seemed to be one of the antifeeding causes.A clear positive correlation was found between the extrernal symptoms of index of pathogenesis (IP) and the content of free amino acid.It indicated that the pines with low content of free amino acid are resistant to PWN and vice versa.And a negative correlation between the IP and the total crude protein and 11 stationary amino acids were also found.

关 键 词：马尾松 种源 氨基酸 松材线虫病 抗病因子 

分 类 号：S791.248[农业科学—林木遗传育种] S763.712.4[农业科学—林学]