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Occurrence of nutrients and plant hormones (cytokinins and IAA) in the water fern Salvinia molesta during growth and composting
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SYSNO ASEP 0305963 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Occurrence of nutrients and plant hormones (cytokinins and IAA) in the water fern Salvinia molesta during growth and composting Title Occurrence of nutrients and plant hormones (cytokinins and IAA) in the water fern Salvinia molesta during growth and composting Author(s) Arthur, G. D. (ZA)
Stirk, W. A. (ZA)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Hekera, P. (CZ)
van Staden, J. (ZA)Source Title Environmental and Experimental Botany. - : Elsevier - ISSN 0098-8472
Roč. 61, č. 2 (2007), s. 137-144Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords auxins ; culture medium ; cytokinins Subject RIV BO - Biophysics R&D Projects LC06034 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA206/05/0894 GA ČR - Czech Science Foundation (CSF) Next source Other public resourcesOther public resources CEZ AV0Z50380511 - UEB-Q (2005-2011) DOI 10.1016/j.envexpbot.2007.05.002 Annotation The aquatic fern Salvinia molesta is classified as an invasive, noxious weed in southern Africa. It has rapid growth and forms a thick mat in slow moving water bodies. It is hypothesized that S. molesta is a suitable candidate to promote as an organic fertilizer. The aims of this study were to determine the mineral content as well as the cytokinin and auxin content in S. molesta. The release of these compounds into the culture medium and upon decomposition of the air-dried plant matter was also determined. Minerals detected in the fresh plant material were N > K > P > Ca > Mg > Fe > Na > Cu > Zn while Cd, Pb and Ni were below the level of detection. The mineral concentrations changed after 14 days decomposition with there being an increase in Ca, Mg and Fe and a decrease in K. Sixteen isoprenoid cytokinins were detected in the plant material (total concentration 81.62 pmol g(-1) DW) while only four cytokinins occurred at a greatly reduced concentration in the culture medium (4.31 pmol 500 ml(-1) medium). The material that had been composted for 14 days showed a 17% reduction in cytokinin concentration (67.96 pmol g(-1) DW) compared to the plant material. Run-off, termed leachate, collected during the composting experiment also had high amounts of cytokinin-like activity measured using the soybean callus bioassay. This activity peaked on day 7 of the composting experiment, indicating a rapid release of cytokinin-like compounds. IAA occurred in much higher concentrations than the cytokinins in the plant material (393.6 pmol g(-1) DW) while very little IAA was detected in the culture medium (30.8 pmol g(-1) DW). IAA concentrations were much lower in the composted material (148.1 pmol g(-1) DW) with a 62% loss being recorded compared to the plant material. No auxin-like activity was measured using the mungbean rooting bioassay in the leachate collected at the start of the composting experiment. However, the leachate collected on days 7 and 14 had biological activity indicating that auxin-like compounds were released from S. molesta upon decomposition. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2008
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