High temperature stress with photosynthesis in <EM>Festuca arundinacea</EM>

ZHU Lan; LI Xue-qin; JIA Xiao-lin; WANG Bin; JIN Song-heng

Volume 26 Issue 5

Oct. 2009

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Article Navigation > Journal of Zhejiang A&F University > 2009 > 26(5): 652-655

ZHU Lan, LI Xue-qin, JIA Xiao-lin, WANG Bin, JIN Song-heng. High temperature stress with photosynthesis in Festuca arundinacea[J]. Journal of Zhejiang A&F University, 2009, 26(5): 652-655.

Citation:

ZHU Lan, LI Xue-qin, JIA Xiao-lin, WANG Bin, JIN Song-heng. High temperature stress with photosynthesis in Festuca arundinacea[J]. Journal of Zhejiang A&F University, 2009, 26(5): 652-655.

High temperature stress with photosynthesis in Festuca arundinacea

1.
School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;
2.
Tianmu College，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China

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Corresponding author: JIN Song-heng
Publish Date: 2009-10-20

Abstract

To uncover the adaptation mechanisms of photosynthesis for high temperature，gas exchange and chlorophyll fluorescence of Festuca arundinacea cultivars ‘Crossfire 2’ and ‘Houndog 5’were tested under control （20 ℃） and high temperature stress （38 ℃） with four replications for net photosynthetic rate （Pn），stomatal conductance （Gs），intercellular CO2 concentrations（Ci），maximum rate of photochemical quantum （Fv /Fm），efficiency of excitation energy captured by PSⅡ（F′v /F′m），photochemical quenching （qP），non-photochemical quenching （qNP），and electron transport flow （RET）. Results showed that after high temperature stress，Pn in both cultivars significantly decreased（P＜0.05）， Gs and Ci decreased in ‘Houndog 5’，Gs slightly decreased，and Ci even increased in ‘Crossfire 2’ Fv /Fm，F′v /F′m，qP，and RET significantly decreased （P＜0.05） in both cultivars；and qNP significantly increased（P＜0.05）. These results indicated that stomatal factors led to the Pn decrease in ‘Houndog 5’，but non-stomatal factors led to the Pn decrease in ‘Crossfire 2’，and that by effectively dissipating extra excitation energy，F. arundinacea can protect its photosynthetic mechanism from high temperature stress.［Ch，3 fig. 16 ref.］
- botany,
- Festuca arundinacea,
- high temperature stress,
- pholosynthesis

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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High temperature stress with photosynthesis in Festuca arundinacea

1. School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;

2. Tianmu College，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China

Corresponding author: JIN Song-heng

Publish Date: 2009-10-20

Key words:

Abstract: To uncover the adaptation mechanisms of photosynthesis for high temperature，gas exchange and chlorophyll fluorescence of Festuca arundinacea cultivars ‘Crossfire 2’ and ‘Houndog 5’were tested under control （20 ℃） and high temperature stress （38 ℃） with four replications for net photosynthetic rate （Pn），stomatal conductance （Gs），intercellular CO2 concentrations（Ci），maximum rate of photochemical quantum （Fv /Fm），efficiency of excitation energy captured by PSⅡ（F′v /F′m），photochemical quenching （qP），non-photochemical quenching （qNP），and electron transport flow （RET）. Results showed that after high temperature stress，Pn in both cultivars significantly decreased（P＜0.05）， Gs and Ci decreased in ‘Houndog 5’，Gs slightly decreased，and Ci even increased in ‘Crossfire 2’ Fv /Fm，F′v /F′m，qP，and RET significantly decreased （P＜0.05） in both cultivars；and qNP significantly increased（P＜0.05）. These results indicated that stomatal factors led to the Pn decrease in ‘Houndog 5’，but non-stomatal factors led to the Pn decrease in ‘Crossfire 2’，and that by effectively dissipating extra excitation energy，F. arundinacea can protect its photosynthetic mechanism from high temperature stress.［Ch，3 fig. 16 ref.］

High temperature stress with photosynthesis in Festuca arundinacea

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通讯作者: 陈斌, bchen63@163.com

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High temperature stress with photosynthesis in Festuca arundinacea

1. School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;

2. Tianmu College，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China

Corresponding author: JIN Song-heng

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High temperature stress with photosynthesis in Festuca arundinacea

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通讯作者: 陈斌, bchen63@163.com

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High temperature stress with photosynthesis in Festuca arundinacea

1. School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China; 2. Tianmu College，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China

Corresponding author: JIN Song-heng

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1. School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;

2. Tianmu College，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China