日本松干蚧不同虫态的泌蜡特点及FAS与FAE的含量变化  

The Wax Secretion Characters and the Content Changes of FAS and FAE in the Different Stages of Matsucoccus matsumurae (Kuwana)

作　　者：田芬[1] 谢映平[1] 刘卫敏[1] 邵生富 吴俊 

机构地区：[1]山西大学生命科学学院,太原030006 [2]浙江省金华市林业局,浙江金华321000

出　　处：《四川动物》2013年第3期360-363,368,F0003,共6页Sichuan Journal of Zoology

基　　金：国家自然科学基金(31070584);高等学校博士学科点专项科研基金(20101401110008)

摘　　要：本文采用显微观察技术及酶含量测定方法,对日本松干蚧Matsucoccus matsumurae(Kuwana)分泌蜡质的几个虫态及各虫态虫体内与蜡质合成相关的脂肪酸合成酶(FAS)和脂肪酸延伸酶(FAE)的含量变化进行了研究。结果表明:雄性泌蜡主要在二龄若虫期和三龄若虫期,前者为珠形若虫,虫体分泌少量湿蜡,在体表形成薄蜡层,由气门周缘分泌蜡丝,后者泌蜡量大,为蜡丝结茧;雌性泌蜡主要在二龄若虫和雌成虫泌蜡形成卵囊期。FAS含量变化与泌蜡活动关系密切,在雄性的三龄若虫期最高,二龄若虫期次之,蛹期最低;雌性成虫泌蜡前和中期FAS含量最高,产卵完毕时最低,二龄若虫期居中;FAE含量与FAS变化相似,但在二龄若虫期也较高。这说明FAS和FAE参与了蜡质合成过程。To study the wax secretion stages of Matsucoccus matsumurae （Kuwana） and the roles of fatty acid synthase （FAS） and fatty acid elongase （FAE） during these stages, microscopic observation techniques and enzyme content determination method were used. The result showed that the secretion of wax in male scale insects mainly happened in the 2nd instar nymphs and 3rd instar nymphs. The ＂pearl-shaped＂ 2nd instar nymphs would secret less amount of wet wax to form a thin layer on the body surface, and the wax filaments was secreted by the spiracles located on the lateral body. The 3rd instar nymphs secreted a large amout of wax filaments to form cocoons. The females would secret wax in the 2nd instar nymphs and adult stages. The variation of FAS contents was closely related to the wax-secretion activity of scale insect. In the developmental stage of males, the highest content of FAS was in the 3rd instar nymph stage, followed by the 2nd instar nymph stage, and the lowest in the pupal stage. The highest contents of FAS were observed in the early and medium wax secretion stages of adult females. The content of FAS would decrease to the lowest level when the egg deposition was finished. The middle value of FAS was observed in the 2nd instar nymph stage. The variation of FAE contents was similar to that of FAS except the 2nd instar nymph stage. These results indicated that FAS and FAE may play an important role in the synthesis and secretion processes of wax.

关 键 词：日本松干蚧 泌蜡 脂肪酸合成酶FAS 脂肪酸延伸酶FAE 

分 类 号：S763[农业科学—森林保护学]