Drought resistance in seedlings of <EM>Catalpa bungei</EM> cultivars

WANG Gai-ping; CEN Xian-chao; PENG Fang-ren; YANG Hong-ning

Volume 26 Issue 6

Dec. 2009

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WANG Gai-ping, CEN Xian-chao, PENG Fang-ren, YANG Hong-ning. Drought resistance in seedlings of Catalpa bungei cultivars[J]. Journal of Zhejiang A&F University, 2009, 26(6): 815-821.

Citation:

WANG Gai-ping, CEN Xian-chao, PENG Fang-ren, YANG Hong-ning. Drought resistance in seedlings of Catalpa bungei cultivars[J]. Journal of Zhejiang A&F University, 2009, 26(6): 815-821.

Drought resistance in seedlings of Catalpa bungei cultivars

1.
College of Forest Resources and Environment，Nanjing Forestry University，Nanjing 210037，Jiangsu，China

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Corresponding author: PENG Fang-ren
Publish Date: 2009-12-20

Abstract

In order to provide a theoretical foundation for afforestation in arid and semi-arid regions and to exploit the Catalpa resource，drought resistance in one-year-old seedlings of 7 cultivars of Catalpa bungei and C. ovata were studied using a completely random design with treatments of 0，40，80，and 120 g·L-1 and three replications by applying simulated drought stress with PEG 6000. Using method of subordinate function and a system cluster analysis，growth and physiological indexes related to drought resistance were measured and evaluated. Results showed that ‘Guangye’and ‘Ginsi’ cultivars，and C. ovata had higher drought resistance followed by ‘Zhou 2’ and ‘Nanyang’ and finally the stock，‘Yuanchang’，and ‘Yu 1’. Drought resistance of ‘Zhou 2’ and ‘Nanyang’ decreased with the increasing drought stress，but drought resistance of the other cultivars were not greatly changing in any content of drought stress. The method of subordinate function and system cluster analysis revealed that 40 and 80 g·L-1 PEG 6000 were suitable for evaluation of drought resistance with C. bungei in the seedling stage. ［Ch，1 fig. 3 tab. 16 ref.］
- tree physiology,
- Catalpa bungei,
- drought resistance,
- subordinate function,
- cluster analysis

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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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Drought resistance in seedlings of Catalpa bungei cultivars

1. College of Forest Resources and Environment，Nanjing Forestry University，Nanjing 210037，Jiangsu，China

Corresponding author: PENG Fang-ren

Publish Date: 2009-12-20

Key words:

Abstract: In order to provide a theoretical foundation for afforestation in arid and semi-arid regions and to exploit the Catalpa resource，drought resistance in one-year-old seedlings of 7 cultivars of Catalpa bungei and C. ovata were studied using a completely random design with treatments of 0，40，80，and 120 g·L-1 and three replications by applying simulated drought stress with PEG 6000. Using method of subordinate function and a system cluster analysis，growth and physiological indexes related to drought resistance were measured and evaluated. Results showed that ‘Guangye’and ‘Ginsi’ cultivars，and C. ovata had higher drought resistance followed by ‘Zhou 2’ and ‘Nanyang’ and finally the stock，‘Yuanchang’，and ‘Yu 1’. Drought resistance of ‘Zhou 2’ and ‘Nanyang’ decreased with the increasing drought stress，but drought resistance of the other cultivars were not greatly changing in any content of drought stress. The method of subordinate function and system cluster analysis revealed that 40 and 80 g·L-1 PEG 6000 were suitable for evaluation of drought resistance with C. bungei in the seedling stage. ［Ch，1 fig. 3 tab. 16 ref.］

Drought resistance in seedlings of Catalpa bungei cultivars

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Drought resistance in seedlings of Catalpa bungei cultivars

1. College of Forest Resources and Environment，Nanjing Forestry University，Nanjing 210037，Jiangsu，China

Corresponding author: PENG Fang-ren

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Drought resistance in seedlings of Catalpa bungei cultivars

1. College of Forest Resources and Environment，Nanjing Forestry University，Nanjing 210037，Jiangsu，China

Corresponding author: PENG Fang-ren

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