JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (04): 39-44.doi: 10.3969/j.issn.1000-2006.2014.04.008

Previous Articles     Next Articles

Chlorophyll fluorescence parameters and expression of cold-related transcription factors in regenerated plants of Dendrocalamus farinosus under cold stress

CHEN Rong, ZHANG Li, CAO Ying, LU Xueqin, HU Shanglian*, DUAN Ning   

  1. College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
  • Online:2014-07-31 Published:2014-07-31

Abstract: In order to explore the cold-resistance of the regenerated plants from Dendrocalamus farinosus, the seedlings of D. farinosus(SS)and three regenerated plants(No.101-1c, No.42-1-B and No.90-3)induced from D. farinosus mature embryo in vitro were exposed to cold stress in this study. Their chlorophyll fluorescence parameters and expression level of cold-related transcription factors under cold stress were investigated. It aimed to the results showed that SS could be resistant to 0 ℃; No.90-3 could be resistant to 4 ℃,while No.101-1c and No.42-1-B could be resistant to-10 ℃. It indicated that the cold-resistance of three regenerated plants was different and had obvious difference with SS. Under cold stress, Fv/Fm, Y(Ⅱ)and qP of SS, No.101-1c and No.90-3 decreased with the temperature decreasing, while Y(Ⅱ) of No.42-1-B went up and then descended, but the Fv/Fm, NPQ and qP reduced. The expression level of WRKY and CBF1 from SS decreased, while the expression level of MYB increased. In No.90-3 and No.42-1-B, the increase of expression level of MYB, WRKY and CBF1 was observed, and the transcription accumulation of WRKY and CBF1 from No.101-1c increased, but the expression level of MYB reduced under the cold stress. The results of correlation analysis showed that the expression of WRKY and CBF1 from SS had a significant positive relationship with Y(Ⅱ); the relationship between MYB and Y(Ⅱ)from No.101-1c was positive significantly, while there was a significant negative relationship among NPQ, WRKY and CBF1. In addition, WRKY showed a significant negative relationship to qP of No.42-1-B.

CLC Number: