title: Effects of indole-3-acetic acid on arsenic uptake and antioxidative enzymes in Pteris cretica var. nervosa and Pteris ensiformis.
abstract: A hydroponic experiment was conducted to investigate the effects of indole-3-acetic acid (IAA) on arsenic (As) uptake and antioxidative enzymes in fronds of Pteris cretica var. nervosa (As hyperaccumulator) and Pteris ensiformis (non-hyperaccumulator). Plants were exposed to 2 mg L-1As(III), As(V) or dimethylarsinic acid (DMA) and IAA concentrations for 14 d. The biomass and total As in the plants significantly increased at 30 mg L-1IAA. Superoxide dismutase (SOD) activities significantly increased with IAA addition. Catalase (CAT) activities showed a significant increase in P. ensiformis exposed to three As species at 30 or 50 mg L-1IAA but varied in P. cretica var. nervosa. Peroxidase (POD) activities were unchanged in P. ensiformis except for a significant decrease at 50 mg L-1IAA under As(III) treatment. However, a significant increase was observed in P. cretica var. nervosa at 10 mg L-1IAA under As(III) or DMA treatment and at 50 mg L-1IAA under As(V) treatment. Under DMA stress, malondialdehyde contents in fronds of P. cretica var. nervosa showed a significant decrease at 10 mg L-1IAA but remained unchanged in P. ensiformis. Therefore, IAA enhanced As uptake and frond POD activity in P. cretica var. nervosa under As stress.
authors.affiliation: a Faculty of Environmental Science and Engineering, Kunming University of Science and Technology , Kunming , China.
authors.forename: Shujuan
authors.initials: S
authors.lastname: He
authors.affiliation: a Faculty of Environmental Science and Engineering, Kunming University of Science and Technology , Kunming , China.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Hu
authors.affiliation: a Faculty of Environmental Science and Engineering, Kunming University of Science and Technology , Kunming , China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Wang
authors.affiliation: a Faculty of Environmental Science and Engineering, Kunming University of Science and Technology , Kunming , China.
authors.forename: Haijuan
authors.initials: H
authors.lastname: Wang
authors.affiliation: a Faculty of Environmental Science and Engineering, Kunming University of Science and Technology , Kunming , China.
authors.forename: Qinchun
authors.initials: Q
authors.lastname: Li
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D001151:Arsenic / Q000378:metabolism*; D018533:Biomass; D018527:Hydroponics; D007210:Indoleacetic Acids / Q000008:administration & dosage / Q000494:pharmacology*; D008315:Malondialdehyde / Q000378:metabolism; D010937:Plant Growth Regulators / Q000494:pharmacology*; D018515:Plant Leaves / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism; D032495:Pteris / Q000187:drug effects* / Q000201:enzymology / Q000235:genetics / Q000378:metabolism; D012989:Soil Pollutants / Q000378:metabolism*; D013045:Species Specificity
chemical_list: D000975:Antioxidants; D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D010940:Plant Proteins; D012989:Soil Pollutants; D008315:Malondialdehyde; C030737:indoleacetic acid; D001151:Arsenic
keywords: Antioxidative enzymes; arsenic; indole-3-acetic acid (IAA)