Scientia Agricultura Sinica ›› 2006, Vol. 39 ›› Issue (7): 1387-1394 .

• PLANT PROTECTION • Previous Articles     Next Articles

Effects of Plant Species Switching on Contents and Dynamics of Trehalose and Trehalase Activity of Bemisia tabaci B-biotype and Trialeurodes vaporariorum

Fang Lei,GuiFen Zhang,FangHao Wan,Jun Ma   

  1. 农业部生物防治资源研究与利用重点实验室，中国农科院生防所
  • Received:2006-03-06 Revised:2006-05-14 Online:2006-07-10 Published:2006-07-10
  • Contact: FangHao Wan

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Abstract: 【Objective】The contents and dynamics of trehalose and trehalase activity of Bemisia tabaci B-biotype and Trialeurodes vaporariorum were evaluated when 【Method】 Their host plant species switched from tomato (an addicted host plant species of both whitefly species, also as the control) to cotton (B. tabaci B-biotype is addicted to it and T. vaporariorum can develop), cabbage (B. tabaci B-biotype is addicted to it but T. vaporariorum cannot survival) and maize (both whitefly species cannot survival) plants.【Result】The trehalose contents of B. tabaci B-biotype and T. vaporariorum decreased when both whitefly species switched from tomato to the three tested plant species, especially to the cotton, decreased by 33% and 25%, respectively. There were no significant differences between the two whitefly species switched to cotton and cabbage plants when the dynamics of trehalose contents were compared. However, switched to non-addicted host, the maize, the recovery ability and stability of B. tabaci B-biotype (112.6%) were more powerful than those of T. vaporariorum (60.8%). The effects of plant species switching on trehalase activity of the two whitefly species were not prominent, but the dynamics of trehalase activity of both were different. The dynamics of trehalase activity of B. tabaci B-biotype were not different when switched to cotton, cabbage or maize plants; however, the differences were observed when T. vaporariorum switched to the same three plant species. The dynamics of trehalase activity of B. tabaci B-biotype and T. vaporariorum on non-addicted maize plant were not significantly different; however, the recovery ability and stability of B. tabaci B-biotype (56.0%) were greater than that of T. vaporariorum (48.4%). 【Conclusion】The present results indicated that the trehalase may be important in the enlargement of host plant species of B. tabaci B-biotype and in the competition between B. tabaci B-biotype and T. vaporariorum.

Key words: Bemisia tabaci B biotype, Trialeurodes vaprorariorum, trehalose content, trehalase activity, dynamics, adaptability

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