Abstract:

The dynamics of haemolymph ployamines of the last instar and diapausing prepupa of the sawfly Chinolyda flagellicornis were determined by fluorescence spectrophotometer. The results showed that there were eight kinds of polyamines in the haemolymph of the sawfly,the putrescine(Put)、spermidine(Spd)、spermine(Spm) and cadaverine(Cad) were common polyamines,and the titres and kinds of polyamines were varied with the stages of development. The tires of Spm of diapausing prepupa maintained in a higher level,and formed two separated Spm concentration peak values. The Spd could not be detected in the first five months of diapausing prepua,but it had a higher level in the next development. The tires of Cad were going up a little before pupation,while the titres of Put were higher during the whole development of diapausing prepupa,formed one peak values in the times of 90 days of development,and going up sharply before pupation. It seemed that the polyamines are involved in regulating the diapause of C. flagellicornis.

Key words: Chinolyda flagellicornis, diapause, polyamines