
TY  - JOUR
A1  - Pritchard, Seth G. 
A1  - Ju, Zhenlin 
A1  - van Santen, Edzard 
A1  - Qiu, Jiansheng 
A1  - Weaver, David B. 
A1  - Prior, Stephen A. 
A1  - Rogers, Hugo H. 
T1  - The influence of elevated CO<emph type="8">2</emph> on the activities of antioxidative enzymes in two soybean genotypes
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 2000
VL  - 27
IS  - 11
SP  - 1061
EP  - 1068
KW  - antioxidative enzymes, elevated CO2, soybean genotypes.
UR  - https://doi.org/10.1071/PP99206 
N2  - The effects of elevated compared to current atmospheric CO2 concentration (720 and 365 L L &#8211;1 , respectively) on antioxidative enzymatic activities of two soybean (Glycine max (L.) Merr.) genotypes (R and S) grown in open-top field chambers were investigated. Enzymatic activities of leaves collected 40, 47, 54 and 61 d after planting were measured. Elevated CO2 significantly decreased activities of superoxide dismutase (SOD, EC 1.15.1.1), peroxidase (POD, EC 1.11.1.7), catalase (CAT, EC 1.11.1.6), ascorbate peroxidase (APOD, EC 1.11.1.7), gluta-thione peroxidase (GPOD, EC 1.11.1.9) and glutathione reductase (GR, EC 1.6.4.2) in both genotypes. The activi-ties of dehydroascorbate reductase (DAR, EC 1.8.5.1) and monodehydroascorbate reductase (MDAR, EC 1.1.5.4.) increased in genotype S, but decreased in genotype R under elevated CO2. Elevated CO2 decreased rubisco activity and rubisco, chlorophyll, carotenoids and total soluble protein contents in both genotypes. Results indicate that constitutive antioxidative enzymatic activities may decrease in a high-CO2 world. Significant CO2 &yen; genotype interactions, however, suggest that there may be key genotypic differences in response patterns, potentially conferring differential resistance to biotic and abiotic stress. 
ER  -

