[Effects of high temperature stress on root vitality and leaf biochemical indexes in different populations of Pinellia ternate].

ABSTRACT

OBJECTIVE: To study the effects of high temperature stress on the root vitality and leaf biochemical indexes in populations of Pinellia ternate. METHOD: The leaf activity of SOD, contents of MDA and free praline and root vitality were determined after a treatment of high temperature stress (35 degrees C/25 degrees C) was given to different populations of P. ternate. RESULT AND CONCLUSION: By stress time increasing, the leaf SOD and free praline rose firstly and then dropped, the content of MDA increased while the root ability decreased in all populations. And the response of populations of P. ternate to high temperature was significantly different.