Soil NaCl stress and photosynthetic characteristics with <EM>Clerodendrum trichotomum</EM>

XIE Fu-chun; CHEN Cai-ye; ZHANG Wen-ting; WEI Juan; LI Yuan-yuan; WANG Hua-tian

Volume 26 Issue 2

Apr. 2009

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Article Navigation > Journal of Zhejiang A&F University > 2009 > 26(2): 176-181

XIE Fu-chun, CHEN Cai-ye, ZHANG Wen-ting, WEI Juan, LI Yuan-yuan, WANG Hua-tian. Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum[J]. Journal of Zhejiang A&F University, 2009, 26(2): 176-181.

Citation:

XIE Fu-chun, CHEN Cai-ye, ZHANG Wen-ting, WEI Juan, LI Yuan-yuan, WANG Hua-tian. Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum[J]. Journal of Zhejiang A&F University, 2009, 26(2): 176-181.

Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum

1.
Key Laboratory of Agricultural Ecology and Environmemt，Shandong Agricultural University，Tai’an 271018，Shandong，China;
2.
Garden Management Department of Yantai，Yantai 264000，Shandong，China

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Corresponding author: WANG Hua-tian
Publish Date: 2009-04-20

Abstract

Clerodendrum trichotomum is a small tree with strong adaptability and fine ornament，which maybe a select for greening tree species in saline land. We set salt treatment test to determine its salt tolerance. Stress from soil NaCl treatments of 0（the control），2，4，6，8 g·kg－1 on one-year-old C. trichotomum potted seedlings with five replications were studied for their morphology，chlorophyll content，gas exchange characteristics，and water use efficiency（WUE）. The parameters were determined from the second treatment day to the twelfth treatment day. Results showed that as NaCl stress increased and with a prolonged stress time，new shoot and functional leaves faded becoming brown with chlorophyll a（chla），chlorophyll b （chlb），chla/chlb，stomatal conductance （Gs），transpiration rate （Tr），WUE，and net photosynthesis （Pn） gradually decreasing. Intercellular CO2 concentration （Ci） decreased but later increased；stomatal limitation value（Ls） changes were the opposite of Ci changes. Salt tolerance of C. trichotomum was less than 6 g·kg－1 in few days. Stomatal limitations mainly caused the decline in the photosynthetic rate of C. trichotomum，whereas in the long run non-stomatal limitations were the primary cause.［Ch，5 fig. 14 ref.］
- tree physiology,
- Clerodendrum trichotomum,
- NaCl stress,
- gas exchange characteristics

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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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Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum

1. Key Laboratory of Agricultural Ecology and Environmemt，Shandong Agricultural University，Tai’an 271018，Shandong，China;

2. Garden Management Department of Yantai，Yantai 264000，Shandong，China

Corresponding author: WANG Hua-tian

Publish Date: 2009-04-20

Key words:

Abstract: Clerodendrum trichotomum is a small tree with strong adaptability and fine ornament，which maybe a select for greening tree species in saline land. We set salt treatment test to determine its salt tolerance. Stress from soil NaCl treatments of 0（the control），2，4，6，8 g·kg－1 on one-year-old C. trichotomum potted seedlings with five replications were studied for their morphology，chlorophyll content，gas exchange characteristics，and water use efficiency（WUE）. The parameters were determined from the second treatment day to the twelfth treatment day. Results showed that as NaCl stress increased and with a prolonged stress time，new shoot and functional leaves faded becoming brown with chlorophyll a（chla），chlorophyll b （chlb），chla/chlb，stomatal conductance （Gs），transpiration rate （Tr），WUE，and net photosynthesis （Pn） gradually decreasing. Intercellular CO2 concentration （Ci） decreased but later increased；stomatal limitation value（Ls） changes were the opposite of Ci changes. Salt tolerance of C. trichotomum was less than 6 g·kg－1 in few days. Stomatal limitations mainly caused the decline in the photosynthetic rate of C. trichotomum，whereas in the long run non-stomatal limitations were the primary cause.［Ch，5 fig. 14 ref.］

Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum

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通讯作者: 陈斌, bchen63@163.com

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Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum

1. Key Laboratory of Agricultural Ecology and Environmemt，Shandong Agricultural University，Tai’an 271018，Shandong，China;

2. Garden Management Department of Yantai，Yantai 264000，Shandong，China

Corresponding author: WANG Hua-tian

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Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum

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通讯作者: 陈斌, bchen63@163.com

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Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum

1. Key Laboratory of Agricultural Ecology and Environmemt，Shandong Agricultural University，Tai’an 271018，Shandong，China; 2. Garden Management Department of Yantai，Yantai 264000，Shandong，China

Corresponding author: WANG Hua-tian

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1. Key Laboratory of Agricultural Ecology and Environmemt，Shandong Agricultural University，Tai’an 271018，Shandong，China;

2. Garden Management Department of Yantai，Yantai 264000，Shandong，China