林业科学2017，Vol.53Issue(8)：149-154,6.DOI:10.11707/j.1001-7488.20170817
营养和蒎烯胁迫条件下松材线虫雌雄比变化规律
Changing Pattern of Sex Ratio of Pine Wood Nematode (Bursaphelenchus xylophilus) under Different Nutrition Conditions and Pinene Stress
摘要
Abstract
[Objective]The sex ratio is one of the determining factors of the nematode reproduction rate that is key for the pathogenicity,and population expansion of pine wood nematode,Bursaphelenchus xylophilus. This study aims to survey the reproductive tactics of PWN under different cultural conditions for providing a theoretical basis for futher study on the population expansion relatived to reproductive behavior and strategy for prevention and control of pine wood disease.[Method]We investigated the change pattern of PWN female to male ratio under different nutritional conditions and pinene stress by micro-examination.[Result]The sex ratios were biased to females at nutrition-rich conditions and the nematodes exercised a masculinizing effect on the developing larvae in poor nutrition environments. The α-pinene and β-pinene were ableto inhibit the nematode's reproductive rate with low sex ratio at low concentration but promote the rate at high concentration with high sex ratio. The β-pinene might inhibit the reproduction potential with low sex ratio at low and high concentration. The sex ratio was lowest and relatively stable under the mixture stress of low concentration α-pinene and β-pinene.[Conclusion]The PWN sex ratios were biased to females at favorable environmental conditions and the nematodes exercised a masculinizing effect on the developing larvae in uncomfortable environments. Thus we infer that the PWN would control the reproduction rate by modifying the sex ratio to adapt the environment change.关键词
松材线虫/繁殖生物学/繁殖对策/雌雄比/繁殖率Key words
pine wood nematode/reproductive behavior/reproductive tactics/sex ratio/reproduction ratio分类
农业科技引用本文复制引用
王璇,理永霞,张星耀..营养和蒎烯胁迫条件下松材线虫雌雄比变化规律[J].林业科学,2017,53(8):149-154,6.基金项目
浙江省省院合作林业科技项目(2014SY17) （2014SY17）
国家自然科学基金项目"松材线虫致病相关基因协调致病机理研究"(201601001-720). （201601001-720）
