Chinese Bulletin of Botany ›› 2018, Vol. 53 ›› Issue (4): 509-518.DOI: 10.11983/CBB17115

• EXPERIMENTAL COMMUNICATIONS • Previous Articles     Next Articles

Chloroplast Ultrastructure and Chlorophyll Fluorescence Characteristics of Three Cultivars of Pseudosasa japonica

Chen Keyi, Li Zhaona, Cheng Minmin, Zhao Yanghui, Zhou Mingbing, Yang Haiyun*()   

  1. State Key Laboratory of Subtropical Silviculture Zhejiang Provincial Collaborative, Innovation Center for Bamboo Resources and High-Efficiency Utilization, Zhejiang A & F University, Lin’an 311300, China
  • Received:2017-06-10 Accepted:2017-10-07 Online:2018-07-01 Published:2018-09-11
  • Contact: Yang Haiyun
  • About author:† These authors contributed equally to this paper

Abstract:

We explored the different photosynthetic characteristics of three Pseudosasa cultivars: P. japonica, P. japonica f. akebonosuji, and P. japonica f. akebono. The differences in photosystem activity and photosynthetic characteristics of different leaf colors were revealed by the changes of chloroplast ultrastructure and fluorescence kinetics curves. The results showed that the photosynthetic pigment content of the three species was significantly different. Except for the intact thylakoid layer structure in the white part of the chloroplast, the green streak and the radix were significantly less than the radix. The chloroplast developmental maturity is inconsistent; the OJIP curve and parameters indicate that the open reduction of the flowering green leaf and the saplings of the PSII reaction center is lower than that of the yam, the capture energy that is used for the electron transfer share to be smaller, and the PSII activity is weaker; The redox balance of the electron transport chain of bamboo leaves P700 to QA is biased towards the reducing side, and it is presumed that the P700 reaction center P700 to PSII primary electron acceptor QA electron transport chain is damaged. Therefore, the chloroplast development caused by changes in PSII activity in the photosystem is immature, which may be the direct cause of the difference in leaf color of the species.

Key words: leaf coloration, Pseudosasa japonica f. akebonosuji, photosynthetic pigments, chloroplast ultrastructure, chlorophyll fluorescence