|Table of Contents|

Comparison of Photosynthetic Capacity and Light Response Curve Models of Soybean Under Elevated Ozone Concentration(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2021年04期
Page:
497-503
Research Field:
Publishing date:

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Title:
Comparison of Photosynthetic Capacity and Light Response Curve Models of Soybean Under Elevated Ozone Concentration
Author(s):
SUN Ming-yu WANG Yan FAN Ren-xue MU Lin ZHAO Tian-hong
(Agronomy College, Shenyang Agricultural University, Shenyang 110161, China)
Keywords:
Ozone Soybean Gas exchange parametersLight response curve Light response model
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2021.04.0497
Abstract:
?In order to study the changes of photosynthetic capacity and light response curve of soybean leaves and the applicability of light response curve fitting model under the condition of elevated ozone (O3) concentration, a pot experiment was conducted in open top chambers (OTCs) with Tiefeng 29 as experimental material. Three O3 concentrations (CK: 45 nL·L-1,T1: 80±10 nL·L-1, T2: 120±10 nL·L-1) were set to fumigate soybean, and the air pressure was measured. We used four light response curve fitting models including non right angle hyperbolic model (NRH), right angle hyperbolic model (RH), modified right angle hyperbolic model (MRH) and exponential model (EM) to calculate the photosynthetic parameters, furthermore analyzed and compared the fitting effects of the four light response curve models. The results showed that the maximum net photosynthetic rate (Pmax), apparent quantum efficiency (AQE), stomatal conductance (Gs), transpiration rate (Tr), intercellular CO2 concentration (Ci) and water use efficiency (WUE) of soybean leaves were significantly decreased, and the light compensation point (LCP) and light saturation point (LSP) of soybean leaves were not significantly changed with the increase of O3 concentration. The ability of respiration and the rate of dark respiration (Rd) were affected. The fitting results of light response parameters under each model showed that the modified right angle hyperbolic model (MRH) had better fitting effect, but the fitting effect of MRH model was poor when fitting light saturation point (LSP) was under high O3 concentration, while the fitting effect of?

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Last Update: 2021-08-06