Influcnces of Drought Stress on Photosynthetic Characteristics of Fragile Willow

SONG Xue-gui; WANG Bin; ZHOU Guang-liang; HU Hong-lin

doi:10.16779/j.cnki.1003-5508.2014.05.009

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Volume 35 Issue 5

Nov. 2019

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Article Navigation > Journal of Sichuan Forestry Science and Technology > 2014 > 35(5): 40-44

SONG Xue-gui, WANG Bin, ZHOU Guang-liang, HU Hong-lin. Influcnces of Drought Stress on Photosynthetic Characteristics of Fragile Willow[J]. Journal of Sichuan Forestry Science and Technology, 2014, 35(5): 40-44. doi: 10.16779/j.cnki.1003-5508.2014.05.009

Citation:

SONG Xue-gui, WANG Bin, ZHOU Guang-liang, HU Hong-lin. Influcnces of Drought Stress on Photosynthetic Characteristics of Fragile Willow[J]. Journal of Sichuan Forestry Science and Technology, 2014, 35(5): 40-44. doi: 10.16779/j.cnki.1003-5508.2014.05.009

Influcnces of Drought Stress on Photosynthetic Characteristics of Fragile Willow

doi: 10.16779/j.cnki.1003-5508.2014.05.009

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Forest Bureau of Meishan District, Meishan 620010, China;Forestry College of Sichuan Agricultural University, Ya'an 625014, China

Received Date: 2014-06-06

Abstract

Pot experiments were conducted with 5 watering treatments (watering to 80% field capacity, then stopping watering,followed by drought stress of 16 days,12 days,8 days,4 days and 0 day) on fragile willow saplings. Photosynthetic indicators of fragile willow were determined and analyzed under different drought stress. And the change of photosynthetic indicators of fragile willow after re-watering were observed. The results showed as follows:1) with the increase of drought stress, the net photosynthetic rate (Pn) of fragile willow saplings decreased significantly,stomatal conductance (Gs) and transpiration rate (Tr) overall decreased,and intercellular CO₂ concentration (Ci) decreased at first and then increased. 2) After re-watering the sapling for 72 and 120 hours, the net photosynthetic rate (Pn), stomatal conductance (Gs),the intercellular CO₂ concentration (Ci) and the transpiration rate (Tr) increased significantly. 3) Fragile willow adopted such a drought avoidance strategy as turning yellow,wilting,curling and drying off of leaves and wilting and sagging of terminal buds to cope with drought stress.
- Fragile willow (Salix fragilis L.);
- Drought stress;
- Re-water;
- Photosynthetic Characteristics
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Influcnces of Drought Stress on Photosynthetic Characteristics of Fragile Willow

doi: 10.16779/j.cnki.1003-5508.2014.05.009

Forest Bureau of Meishan District, Meishan 620010, China;Forestry College of Sichuan Agricultural University, Ya'an 625014, China

Received Date: 2014-06-06

Key words:

Abstract: Pot experiments were conducted with 5 watering treatments (watering to 80% field capacity, then stopping watering,followed by drought stress of 16 days,12 days,8 days,4 days and 0 day) on fragile willow saplings. Photosynthetic indicators of fragile willow were determined and analyzed under different drought stress. And the change of photosynthetic indicators of fragile willow after re-watering were observed. The results showed as follows:1) with the increase of drought stress, the net photosynthetic rate (Pn) of fragile willow saplings decreased significantly,stomatal conductance (Gs) and transpiration rate (Tr) overall decreased,and intercellular CO₂ concentration (Ci) decreased at first and then increased. 2) After re-watering the sapling for 72 and 120 hours, the net photosynthetic rate (Pn), stomatal conductance (Gs),the intercellular CO₂ concentration (Ci) and the transpiration rate (Tr) increased significantly. 3) Fragile willow adopted such a drought avoidance strategy as turning yellow,wilting,curling and drying off of leaves and wilting and sagging of terminal buds to cope with drought stress.