Effects of high concentration ozone on soybean growth and grain yield

LI Cai-hong; LI Yong; WUYUN Ta-na; WU Guang-lei; JIAN Gao-ming
September 2010
Yingyong Shengtai Xuebao;Sep2010, Vol. 21 Issue 9, p2347
Academic Journal
By using open top chambers (OTCs), soybean plants were grown in pots, and exposed to charcoal-filtered air ([O3]<10 μg∙kg-1) and elevated O3(80 μg∙kg-1) after anthesis, aimed to investigate the responses of soybean's agronomic characters, leaf area, chlorophyll content, antioxidant system, and grain yield to elevated O3. Under elevated O3, the leaf area and chlorophyll content decreased significantly (P<0.05), and the leaf catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD) activities had a significant increase(P<0.01) first but a gradual decrease then, compared with those under charcoal-filtered air. Elevated O3 decreased the leaf soluble protein and ascorbate content (AsA) contents while increased the leaf malonaldehyde (MDA) content (P<0.05), suggesting that the leaf membrane lipid peroxidation was accelerated. The dry mass per plant, effective pod number, grain number, 100-grains weight, and grain yield under elevated O3 had somewhat decreased, among which, grain yield decreased significantly, with the decrement reached to 47% (P<0.01).


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