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dc.contributor.authorPiyanart Saunkaewen_US
dc.contributor.authorPrasit Wangpakapattanawongen_US
dc.contributor.authorArunothai Jampeetongen_US
dc.date.accessioned2018-09-04T04:21:38Z-
dc.date.available2018-09-04T04:21:38Z-
dc.date.issued2011-11-01en_US
dc.identifier.issn15733017en_US
dc.identifier.issn09639292en_US
dc.identifier.other2-s2.0-80054883212en_US
dc.identifier.other10.1007/s10646-011-0744-8en_US
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80054883212&origin=inwarden_US
dc.identifier.urihttp://cmuir.cmu.ac.th/jspui/handle/6653943832/50001-
dc.description.abstractThe effects of high NH4+concentration on growth, morphology, NH4+uptake and nutrient allocation of Myriophyllum brasiliense were investigated in hydroponic culture. The plants were grown under greenhouse conditions for 4 weeks using four levels of NH4+concentration: 1, 5, 10 and 15 mM. M. brasiliense grew well with a relative growth rate of c.0.03 day-1at NH4+concentration up to 5 mM. At the higher NH4+concentrations the growth of the plants was stunted and the plants had short roots and few new buds, especially when grown in 15 mM NH4+where the submerged leaves were lost and there were rotten roots and submerged stems. To avoid NH4+toxicity, the plants may have a mechanism to prevent cytoplasmic NH4+accumulation in plant cells. The net uptake of NH4+significantly decreased and the total N significantly increased in the plants treated with 10 and 15 mM NH4+, respectively. The plant may employ NH4+assimilation and extrusion as a mechanism to compensate for the high NH4+concentrations. However, the plants may show nutrient deficiency symptoms, especially K deficiency symptoms, after they were exposed to NH4+concentration higher than 10 mM. The present study provides a basic ecophysiology of M. brasiliense that it can grow in NH4+enriched water up to concentrations as high as 5 mM. © 2011 Springer Science+Business Media, LLC.en_US
dc.subjectEnvironmental Scienceen_US
dc.subjectPharmacology, Toxicology and Pharmaceuticsen_US
dc.titleGrowth, morphology, ammonium uptake and nutrient allocation of Myriophyllum brasiliense Cambess. under high NH<inf>4</inf><sup>+</sup>concentrationsen_US
dc.typeJournalen_US
article.title.sourcetitleEcotoxicologyen_US
article.volume20en_US
article.stream.affiliationsChiang Mai Universityen_US
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