Nitrogen assimilation in high lipid (triacylglycerol) transgenic Arabidopsis
dc.contributor.author | Rizvi, Samra | |
dc.date.accessioned | 2018-06-27T04:17:49Z | |
dc.date.available | 2018-06-27T04:17:49Z | |
dc.date.issued | 2018-04-30 | |
dc.description.abstract | This study aimed to gain a greater understanding of the reason(s) for growth limitation in high lipid Arabidopsis thaliana line ‘D1o3-3#47’ under nitrate (NO₃⁻) nutrition, as reported by the Plant Biotechnology group at Agresearch, Palmerston North. Growth (dry weight, DW) and nitrogen (N) related measurements were carried out for D1o3-3#47 and wild type (WT) Arabidopsis plants, initially under a range and then under a selected NO₃⁻ concentration. The study also investigated whether the vegetative growth in any way correlates with the leaf fatty acid content of the Arabidopsis lines studied. Finally, the growth of D1o3-3#47 plants was compared to WT plants initially under a range and then under a selected concentration of four N forms: NO₃⁻, ammonium (NH₄⁺), urea and glutamine. D1o3-3#47 plants showed only 50% of the growth of WT plants at higher (≥ 2 mM) NO₃⁻-N concentrations. Under NO₃⁻ nutrition, D1o3-3#47 plants showed either similar or occasionally greater shoot N% (of g DW), but consistently less shoot total-N than WT plants. Shoot NO₃⁻-N, leaf soluble protein content and leaf nitrate reductase activity (NRA) were greater in D1o3-3#47 plants than WT plants. A weak negative correlation was found between growth and leaf fatty acid content of the Arabidopsis lines studied. D1o3-3#47 plants showed between 53-59% of the growth of WT plants under selected N concentration of NO₃⁻, ammonium (NH₄⁺), urea and glutamine, and their growth was not better than WT plants even under Thrive® nutrition. It appears that D1o3-3#47 plants show limited growth regardless of the N availability or form. Based on these results the possible reasons for the limited growth of D1o3-3#47 plants as compared to WT plants were discussed. | en |
dc.identifier.uri | https://hdl.handle.net/10182/9817 | |
dc.identifier.wikidata | Q112938022 | |
dc.language.iso | en | |
dc.publisher | Lincoln University | |
dc.rights.ccname | Attribution-NonCommercial-NoDerivatives 4.0 International | |
dc.rights.ccuri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.subject | nitrogen assimilation | en |
dc.subject | nitrate | en |
dc.subject | Arabidopsis | en |
dc.subject | Arabidopsis thaliana | en |
dc.subject | transgenic plants | en |
dc.subject | genetic modification | en |
dc.subject | lipids | en |
dc.subject | oleosin | en |
dc.subject | triacylglycerol | en |
dc.subject | vegetative tissue | en |
dc.subject | ammonium | en |
dc.subject | urea | en |
dc.subject | amino acids | en |
dc.subject | glutamine | en |
dc.subject | nitrate reductase | en |
dc.subject | growth | en |
dc.subject.anzsrc | ANZSRC::06 Biological Sciences | en |
dc.subject.anzsrc | ANZSRC::0607 Plant Biology | en |
dc.subject.anzsrc | ANZSRC::060705 Plant Physiology | en |
dc.title | Nitrogen assimilation in high lipid (triacylglycerol) transgenic Arabidopsis | en |
dc.type | Thesis | en |
lu.contributor.unit | Department of Agricultural Sciences | |
lu.thesis.supervisor | Andrews, Mitchell | |
lu.thesis.supervisor | Morton, James | |
lu.thesis.supervisor | Roberts, Nick | |
lu.thesis.supervisor | Winichayakul, Somrutai | |
thesis.degree.grantor | Lincoln University | en |
thesis.degree.level | Masters | en |
thesis.degree.name | Master of Applied Science | en |
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