The difference in the survival rate and physiological response between Pomacea canaliculata and native snail species under drought stress
In order to compare the differences in drought tolerance between Pomacea canaliculata and some indigenous snail species and investigate the mechanisms underlying the successful invasion of Pomacea canaliculata,the survival rates of adult and juvenile Pomacea canaliculata,Cipangopaludina chinesis and Sinotaia quadrata were measured under different durations of drought.And the effects of drought stress on the free water,bound water,and antioxidant enzymes in the bodies of the three snail species were analyzed.The results indicated that the survival rates of Pomacea canaliculata and Cipangopaludina chinesis were significantly higher than those of Sinotaia quadrata;Cipangopaludina chinesis had the highest free water content,while Pomacea canaliculata exhibited the strongest ability in self-water management.The CAT(catalase)activity,SOD(superoxide dismutase)activity,and T-AOC(total antioxidant capacity)of Pomacea canaliculata all increased to varying degrees under drought stress,and were higher than those of the two native snail species.The drought tolerance of the three snail species was Pomacea canaliculata>Cipangopaludina chinesis>Sinotaia quadra-ta.
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NSTL
万方数据
