Photosynthetic and chlorophyll fluorescence characteristics with five Rubus species

SUN Jun－wei; LI Su－fang; JIN Song－heng

doi:10.11833/j.issn.2095-0756.2010.06.025

Volume 27 Issue 6

Dec. 2010

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SUN Jun－wei, LI Su－fang, JIN Song－heng. Photosynthetic and chlorophyll fluorescence characteristics with five Rubus species[J]. Journal of Zhejiang A&F University, 2010, 27(6): 950-955. doi: 10.11833/j.issn.2095-0756.2010.06.025

Citation:

SUN Jun－wei, LI Su－fang, JIN Song－heng. Photosynthetic and chlorophyll fluorescence characteristics with five Rubus species[J]. Journal of Zhejiang A&F University, 2010, 27(6): 950-955. doi: 10.11833/j.issn.2095-0756.2010.06.025

Photosynthetic and chlorophyll fluorescence characteristics with five Rubus species

doi: 10.11833/j.issn.2095-0756.2010.06.025

1.
College of Life Sciences，China Jiliang University，Hangzhou 310018，Zhejiang，China;
2.
School of Forestry and Biotechnology，Zhejiang A ＆ F University，Lin’an 311300，Zhejiang，China

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Corresponding author: JIN Song－heng
Publish Date: 2010-12-20

Abstract

Photosynthetic pigment content，gas exchange response，and chlorophyll fluorescence parameters for photosynthetic photon flux densities（PFD） in five Rubus species，i.e. Rubus lambertianus，R. buergeri，R. corchorifolius，R. parvifolius，and R. hirsutus，were determined. PED were 10 levels of 2 000，1 500，1 200，1 000，800，500，200，100，50，0（the control） molm－2s－1. Results showed that in R. hirsutus the calculated maximum net photosynthetic rate（Pmax），light saturation point （LSP），and light compensation point （LCP） were lowest with LSP below 500 molm-2s-1，whereas in the other four species LSP exceeded 800 molm-2s-1. The ratio of chlorophyll a to b （Chl a/b） of R. hirsutus and R. corchorifolius was significantly lower，but their Chl/Car was higher than three other species. When PFD exceeded LSP，changes in net photosynthetic rate （Pn），stomatal conductance （Gs），intercellular CO2 concentration （Ci），water use efficiency （EWU），photosystem II （PSⅡ） effective photochemical quantum yield efficiency （Fv/Fm），photochemical quenching （qP），and apparent electron transport （RET） in response to PFD were in the order：R. corchorifolius ＞ R. hirsutus，R. parvifolius，and R. lambertianus ＞ R. buergeri；however，for changes in non－photochemical quenching（qN） the species order was reversed. With PFD below LSP，maximums for EWU，PSⅡ maximum photochemical quantum yield （Fv/Fm），and quantum demand （QR） were found in R. corchorifolius with minimums in R. hirsutus and R. lambertianus. Thus，R. corchorifolius could only tolerate low irradiance and easily suffered photo－inhibition；whereas the other four species could tolerate both low and high irradiance as well as photo－inhibition with R. buergeri ＞ R. lambertianus，R. parvifolius，and R. hirsutus.［Ch，2 fig. 3 tab. 13 ref.］
- forest biology,
- Rubus,
- photosynthesis,
- photosynthetic ability,
- chlorophyll fluorescence,
- photo－inhibition

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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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Photosynthetic and chlorophyll fluorescence characteristics with five Rubus species

1. College of Life Sciences，China Jiliang University，Hangzhou 310018，Zhejiang，China;

2. School of Forestry and Biotechnology，Zhejiang A ＆ F University，Lin’an 311300，Zhejiang，China

Corresponding author: JIN Song－heng

Publish Date: 2010-12-20

Key words:

Abstract: Photosynthetic pigment content，gas exchange response，and chlorophyll fluorescence parameters for photosynthetic photon flux densities（PFD） in five Rubus species，i.e. Rubus lambertianus，R. buergeri，R. corchorifolius，R. parvifolius，and R. hirsutus，were determined. PED were 10 levels of 2 000，1 500，1 200，1 000，800，500，200，100，50，0（the control） molm－2s－1. Results showed that in R. hirsutus the calculated maximum net photosynthetic rate（Pmax），light saturation point （LSP），and light compensation point （LCP） were lowest with LSP below 500 molm-2s-1，whereas in the other four species LSP exceeded 800 molm-2s-1. The ratio of chlorophyll a to b （Chl a/b） of R. hirsutus and R. corchorifolius was significantly lower，but their Chl/Car was higher than three other species. When PFD exceeded LSP，changes in net photosynthetic rate （Pn），stomatal conductance （Gs），intercellular CO2 concentration （Ci），water use efficiency （EWU），photosystem II （PSⅡ） effective photochemical quantum yield efficiency （Fv/Fm），photochemical quenching （qP），and apparent electron transport （RET） in response to PFD were in the order：R. corchorifolius ＞ R. hirsutus，R. parvifolius，and R. lambertianus ＞ R. buergeri；however，for changes in non－photochemical quenching（qN） the species order was reversed. With PFD below LSP，maximums for EWU，PSⅡ maximum photochemical quantum yield （Fv/Fm），and quantum demand （QR） were found in R. corchorifolius with minimums in R. hirsutus and R. lambertianus. Thus，R. corchorifolius could only tolerate low irradiance and easily suffered photo－inhibition；whereas the other four species could tolerate both low and high irradiance as well as photo－inhibition with R. buergeri ＞ R. lambertianus，R. parvifolius，and R. hirsutus.［Ch，2 fig. 3 tab. 13 ref.］

Photosynthetic and chlorophyll fluorescence characteristics with five Rubus species

doi: 10.11833/j.issn.2095-0756.2010.06.025

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Related

Proportional views