Volume 27 Issue 3
Jun.  2010
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CAI Wei-jian, GAO Han-dong, BAI Shi-jie. Photosynthetic characteristics of Salix matsudana × alba seedlings[J]. Journal of Zhejiang A&F University, 2010, 27(3): 340-346. doi: 10.11833/j.issn.2095-0756.2010.03.004
Citation: CAI Wei-jian, GAO Han-dong, BAI Shi-jie. Photosynthetic characteristics of Salix matsudana × alba seedlings[J]. Journal of Zhejiang A&F University, 2010, 27(3): 340-346. doi: 10.11833/j.issn.2095-0756.2010.03.004

Photosynthetic characteristics of Salix matsudana × alba seedlings

doi: 10.11833/j.issn.2095-0756.2010.03.004
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  • Corresponding author: GAO Han-dong
  • Publish Date: 2010-06-20
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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Photosynthetic characteristics of Salix matsudana × alba seedlings

doi: 10.11833/j.issn.2095-0756.2010.03.004
    Corresponding author: GAO Han-dong

Abstract: The LI-6400 portable photosynthesis measuring system was used to determine photosynthetic characteristics of leaves in one-year-old seedlings of Salix matsudana alba and then fitted to the Farquhar model. Results showed that (1) During the growing season,diurnal changes in leaf net photosynthetic rate (Pn) had a single-peak curve that appeared at 11 : 00 oclock with a maximum net photosynthetic rate (Pmax) of 20.8 molm-2s-1. (2) When CO2 concentration(350 molmol-1) and temperature(25 ℃) were controlled,the photosynthetic light saturation point (PLS) was 1 847.6 molm-2s-1,and the photosynthetic light compensation point (PLC) was 58.1 molm-2s-1 indicating a sun-tolerant plant. (3) The Farquhar model fitting the response of leaf Pn to intercellular CO2 concentration(Ci),with light intensity(1 500 molm-2s-1) and temperature(25 ℃) being controlled,showed that when Ci<400 molmol-1,the maximum carboxylation rate (Vcmax) was 91.6 molm-2s-1,the CO2 compensation point (Г *) was 46.5 molmol-1,and the respiration rate (Rd) was 4.9 molm-2s-1. From 400 to 1 000 molmol-1 of Ci,increasing the CO2 concentration increased leaf Pn and light utilization efficiency with a leaf CO2 saturation point (PCS) of about 1 000 molmol-1 and a maximum electron transport rate (Jmax) of 256.0 molm-2s-1. When Ci was supersaturated (>1 000 molmol-1),the rate of leaf triose phosphate utilization (UTP) was 19.7 molm-2s-1. [Ch,3 fig. 2 tab. 18 ref.]

CAI Wei-jian, GAO Han-dong, BAI Shi-jie. Photosynthetic characteristics of Salix matsudana × alba seedlings[J]. Journal of Zhejiang A&F University, 2010, 27(3): 340-346. doi: 10.11833/j.issn.2095-0756.2010.03.004
Citation: CAI Wei-jian, GAO Han-dong, BAI Shi-jie. Photosynthetic characteristics of Salix matsudana × alba seedlings[J]. Journal of Zhejiang A&F University, 2010, 27(3): 340-346. doi: 10.11833/j.issn.2095-0756.2010.03.004

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