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Please use this identifier to cite or link to this item: https://scholars.tari.gov.tw/handle/123456789/6709
DC FieldValueLanguage
dc.contributorAgriculture Science, National Chiayi Universityen
dc.contributorAgricultural Chemistry Division, Taiwan Agricultural Research Instituteen
dc.contributorTechnology for Sustainability, Nanhua Universityen
dc.contributorDepartment of Agronomy, National Chiayi Universityen
dc.contributor.authorWan-Ting Chiaoen_US
dc.contributor.authorChien-Hui Syuen_US
dc.contributor.authorBo-Ching Chenen_US
dc.contributor.authorKai-Wei Juangen_US
dc.creatorWan-Ting Chiaoen
dc.creatorChien-Hui Syuen
dc.creatorBo-Ching Chenen
dc.creatorKai-Wei Juangen
dc.date2019-03-
dc.date.accessioned2019-03-06T02:06:01Z-
dc.date.accessioned2020-05-12T01:57:41Z-
dc.date.available2019-03-06T02:06:01Z-
dc.date.available2020-05-12T01:57:41Z-
dc.date.issued2019-03-
dc.identifier.issn0147-6513-
dc.identifier.urihttps://scholars.tari.gov.tw/handle/123456789/6709-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0147651318311953?via%3Dihub-
dc.description.abstractSelecting rice varieties that absorb less Cd from soil will reduce human health risks posed by Cd through rice consumption. Nine rice cultivars that are commonly grown in Taiwan were used for investigating genotypic differences in Cd tolerance and absorption. Hydroponic testing with Cd treatments of 5, 10, and 50 mu M CdCl2 for 7-day exposure was conducted for the cultivars. The reductions in plant growth by Cd treatments were fitted to a dose-response curve; the modeling parameters, that is, the effective Cd concentration resulting in 50% reduction (EC50), were obtained. The Cd concentrations in plant were expressed by a Michaelis-Menten kinetic model and the uptake rate parameters (M/k) were obtained. A field experiment was also conducted in farmland with Cd similar to 0.2 mg kg(-1) in soil. For the rice cultivars used in hydroponics, Cd distributions and physiological traits (CAT, H2O2, and MDA) in seedlings were related to their tolerances to Cd toxicity. Modeling parameters, EC50 and M/k, correspond to the Cd concentrations in rice plant. In the field experiment, the Cd concentrations in brown rice of the indica cultivars (i.e., TCS10, TCS17, and TNGS22) were 0.6 mg kg(-1); these were significantly higher than those of the japonica cultivars (i.e. TY3, TK9, TNG71, KH145, TKW1, and TKW3). By contrast, the three cultivars, KH145, TKW1, and TKW3, whose Cd concentrations in brown rice were lower than 0.3 mg kg(-1) were considered safe relative to the permissible level of 0.4 mg kg(-1). In addition, for the used cultivars, Cd concentrations in brown rice were well expressed (i.e., r(2) = 0.95) as a function of EC50, M/k, and MDA by using multiple regression. Newly bred cultivars could be screened rapidly with hydroponic testing to predict their Cd concentrations in brown rice when grown in the field.en_US
dc.format.extent131 bytes-
dc.format.mimetypetext/html-
dc.languageen_USen
dc.language.isoen_USen_US
dc.publisherAcademic Pressen_US
dc.relationMOST 105-2313-B-415-002-MY3en_US
dc.relation106AS-15.2.4-CI-C2en_US
dc.relation.ispartofEcotoxicology and Environmental Safetyen_US
dc.subjectPaddy soilen_US
dc.subjectCd-uptake kineticsen_US
dc.subjectPhysiological stressen_US
dc.subjectRapid cultivar-screeningen_US
dc.subjectSite-specific safe genotypeen_US
dc.titleCadmium in rice grains from a field trial in relation to model parameters of Cd-toxicity and-absorption in rice seedlingsen_US
dc.typejournal articleen_US
dc.identifier.doi10.1016/j.ecoenv.2018.11.061-
dc.identifier.isi00456226600100-
dc.relation.journalvolume169en_US
dc.relation.pages837-847en_US
item.cerifentitytypePublications-
item.languageiso639-1en_US-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.fulltextwith fulltext-
item.openairetypejournal article-
item.grantfulltextopen-
crisitem.author.deptSoil Survey and Land Utilization Laboratory-
crisitem.author.parentorgAgricultural Chemistry Division-
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