Dynamic changes of leaf parameters of PSⅡ fluorescence kinetics and fast photosynthetic response curves in <i>Artemisia ordosica</i>

ZHANG Jingbo; ZHANG Jinxin; LU Qi; XIN Zhiming; LI Xinle; LIU Qingxin; LI Hongliang

doi:10.11829/j.issn.1001-0629.2018-0691

Pratacultural Science > 2019 > 36(3): 713-719. > DOI: 10.11829/j.issn.1001-0629.2018-0691

ZHANG J B, ZHANG J X, LU Q, XIN Z M, LI X L, LIU Q X, LI H L. Dynamic changes of leaf parameters of PSⅡ fluorescence kinetics and fast photosynthetic response curves in . Pratacultural Science, 2019, 36(3): 713-719 . DOI: 10.11829/j.issn.1001-0629.2018-0691

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Dynamic changes of leaf parameters of PSⅡ fluorescence kinetics and fast photosynthetic response curves in Artemisia ordosica

1.
Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China
2.
Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, Inner Monglia, China
3.
Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
4.
Chinese Academy of Forestry, Beijing 100091, China
5.
Water Construction Investment Group Co., Ltd. of Tongliao, Tongliao 028000, Inner Monglia, China

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Corresponding author:
LU Qi　Email: luqi@caf.ac.cn
Received Date: December 16, 2018
Accepted Date: March 17, 2018
Available Online: March 28, 2019
Published Date: February 28, 2019

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Abstract

Abstract

To explore the mechanisms of adaptive physiological and ecological responses of Artemisia ordosica to desert environments, the dynamic changes of the specific leaf area (SLA), leaf nitrogen content (N_mass), photosynthetic physiological parameters of PSⅡ fluorescence kinetics, and fast photosynthetic response curves of A. ordosica during growth periods were analyzed. The results showed that SLA was the highest in August, but decreased significantly in September (P <0.05), and Nmass showed the opposite tendency. The initial fluorescence (F_o), maximum fluorescence (F_m), and maximum photochemistry efficiency (F_v/F_m) of A. ordosica maintained relatively stable values throughout the growth periods. The minimum fluorescence yield (F_o′) and maximum fluorescence yield (F_m′) under stabilization light varied significantly in different growth stages, with the highest values recorded in August and the lowest in September (P < 0.05). The photosynthetic electron transfer quantum efficiency (ΦPSⅡ) and photochemistry quenching (qP) decreased with the increase of light intensity, while the non-photochemical quenching (NPQ) and photosynthetic electron transfer rate (ETR) showed the opposite trend. The ETR and NPQ of the A. ordosica leaves were the highest in September and the lowest in August under the same light intensity. The results indicated that the leaves of A. ordosica had a high ability to regulate light capture and resist photoinhibition as an adaptation to light environmental changes.
- Artemisia ordosica,
- specific leaf area,
- leaf nitrogen content,
- chlorophyll fluorescence parameters,
- rapid light-response curve

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References

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