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ACTA HORTICULTURAE SINICA ›› 2005, Vol. 32 ›› Issue (1): 148-150.

• 研究报告 • Previous Articles     Next Articles

Mea surement of Cold Tolerance Ba sed on REC and the Log istic Equa tion inCam ellia h iem a lis ‘Shishi Ga shira’

Xu Kang1 , Xia Yip ing13
, Xu Biyu2 , L in Tian2 , and Yang Xia3
  

  1. ( 1Department of Horticulture, College of Agriculture and B iotechnology, Zhejiang University, Hangzhou 310029, China;2Hangzhou FlowerN ursery, Hangzhou 310007, China; 3Hangzhou Academy of Agricultural Sciences, Hangzhou 310008, China)
  • Received:2004-02-09 Revised:2004-07-20 Online:2005-02-25 Published:2005-02-25

Abstract: Abstract: Regarding the relative electric conductivity (REC) as a physiological indicator for the cold
tolerance in leaves of Cam ellia hiem alis ‘Shishi Gashira’, the curves of REC against different treatment of
temperatures and treatment periodswere rep resented using Logistic equation. The results showed that REC in2
creased as a S2curves with the decreased of temperature when the treatment time was longer than six hours.
According to these S2shaped curves and the Logistic equation, we could calculate the semilethal temperature
(LT50 ). The LT50 of C. h iem alis ‘Shishi Gashira’was between - 1215℃ and - 14℃, which may be an
important index of cold tolerance in C. hiem alis.

Key words: Key words: Cam ellia hiem alis, Cold tolerance, Logistic equation, Relative electric conductivity(REC), Semilethal temperature (LT50 )

CLC Number: