Toxic effects of chlorate on three plant species inoculated with arbuscular mycorrhizal fungi

Li, Huashou and Zhang, Xiuyu and Lin, Chuxia and Wu, Qitang (2008) Toxic effects of chlorate on three plant species inoculated with arbuscular mycorrhizal fungi. Ecotoxicology and Environmental Safety, 71 (3). pp. 700-705. ISSN 0147-6513

Abstract

Pot experiments were conducted to examine the toxic effects of chlorate on bermudagrass, bahiagrass, and longan seedling with a focus on arbuscular mycorrhizal fungi-plant associations. The results show that application of chlorate could cause slight soil acidification, but the resulting pH was still around 5.5, which is unlikely to adversely affect plant growth. Increase in the application rate of chlorate resulted in a decrease in colonization rate of arbuscular mycorrhizal fungi in plant roots, P uptake by the plants and plant biomass. This appears to suggest that the reduction in plant growth may be related to impeded uptake of P by the plants due to the failure of the plants to form sufficient mycorrhizal associations when chlorate is in sufficient amounts to cause toxicity to arbuscular mycorrhizal fungi. Under the experimental conditions set for this study, bermudagrass suffered from stronger chlorate stress than bahiagrass and longan seedling did in terms of plant-arbuscular mycorrhizal fungi (AMF) symbiosis development.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy.
Depositing User: epEditor USQ
Faculty / Department / School: Current - USQ Other
Date Deposited: 03 Aug 2011 09:28
Last Modified: 03 Jul 2013 00:36
Uncontrolled Keywords: bahiagrass; bermudagrass; chlorate; ecotoxicity; longan; mycorrhizas; acid soil; acidification; arbuscular mycorrhiza; biological uptake; chlorine; evergreen tree; fungus; grass; growth response; inhibition; pH; root colonization; toxicity test
Fields of Research (FOR2008): 05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
07 Agricultural and Veterinary Sciences > 0706 Horticultural Production > 070601 Horticultural Crop Growth and Development
06 Biological Sciences > 0607 Plant Biology > 060703 Plant Developmental and Reproductive Biology
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970106 Expanding Knowledge in the Biological Sciences
Identification Number or DOI: doi: 10.1016/j.ecoenv.2008.01.027
URI: http://eprints.usq.edu.au/id/eprint/18880

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