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https://ptsldigital.ukm.my/jspui/handle/123456789/499848Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Sahibin Abd Rahim, Prof. Dr. | |
| dc.contributor.author | Waqeed Mahdi (P70192) | |
| dc.date.accessioned | 2023-10-13T09:35:23Z | - |
| dc.date.available | 2023-10-13T09:35:23Z | - |
| dc.date.issued | 2016-06-20 | |
| dc.identifier.other | ukmvital:84640 | |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/499848 | - |
| dc.description | Two landraces of paddy plants (Padi Batu and Sarawak Merah) were cultivated in three paddy fields, field 1 and 2 located adjacent to ultrabasic soil in Ranau, Sabah, whereas the other field (Field 3) considered as a control which is located at the UKM paddy experimental plot. The assessment of heavy metals pollution and the impact of these metals on physico-chemical properties of the soil were investigated. The accumulation of micronutrients (Ca and Mg) and heavy metals (Co, Cr, Cu, Fe, Mn, Ni and Zn) in various parts of the paddy plant, namely roots, stems, leaves and grains at the five developmental stages of the paddy plants (17, 47, 77, 107 and145) days after planting was investigated. The effect of the metals accumulation on chlorophyll content (a, b, a+b and a/b ratio), antioxidative enzymes (APX, CAT, and SOD), growth traits of plant (no. of tillers per plant, no. of leaves per plant, plant height, leaves area and plant dry weight) were also investigated at the five developmental stages. Furthermore, at the harvesting stage, the yield and yield components traits such as (panicle length, no. of panicles per plant, no. of grains per panicle, no. of filled grains per panicle, no. of unfilled grains per panicle, 1000 grains weight, grains weight per plant, grains yield per plant, plant dry weight, biomass, harvest index and total grains yield) were calculated in addition to chemical contents of rice grains (carbohydrate, fat and protein). The result demonstrated that a significant variation (p<0.05) among the locations, Ranau field 1 was significantly higher compared to the other sites in term of magnesium and all heavy metals content due to the ultrabasic soil erosion from nearby area. On the other hand UKM site recorded the lowest concentration of these metals. The accumulation of heavy metals, particularly in the Ranau field 1 soil was significantly increased the uptake of these metals by paddy plants with a significantly increased as the age of the plant increased. The roots of the paddy plant recorded the highest concentration of macronutrients and heavy metals as compared to the other parts of the plant. A high accumulation of heavy metals in the paddy plant at Ranau field 1 was observed significantly reduced in chlorophyll contents (a, b, and total a+b), and caused an increase in the enzyme activities of (APX, CAT and SOD) to a certain limit (47 DAP) in 2014 and (77 DAP) during the year 2015, and then decreased in these activities until harvesting stage, reduced in the growth, grains yield and yield component as well as the chemical contents of the rice grain. Harvesting stage of paddy demonstrated a higher content of micronutrients and some heavy metals concentration in plants, no. of tillers per plant, no. of leaves per plant, plant height and plant dry weight, and the lowest rates of chlorophyll content and antioxidant enzyme activities particularly in the Ranau fields 1 and 2. This work contributed to the knowledge on the effect of increased heavy metals concentration in paddy plant to the chlorophyll content, antioxidative enzyme activities, growth characters, yield and yield components as well as chemical contents of rice grains.,Certification of Master's/Doctoral Thesis" is not available | |
| dc.language.iso | eng | |
| dc.publisher | UKM, Bangi | |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
| dc.rights | UKM | |
| dc.subject | Heavy metals | |
| dc.subject | Oryza sativa L. | |
| dc.subject | Ultrabasic hill soil | |
| dc.subject | Paddy plant | |
| dc.subject | Pollution | |
| dc.subject | Dissertations, Academic -- Malaysia | |
| dc.title | Effects of heavy metals on physiological and yield traits of two landraces of Oryza sativa L. cultivated adjacent to an ultrabasic hill soil | |
| dc.type | Theses | |
| dc.format.pages | 422 | |
| dc.identifier.barcode | 002541(2017) | |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_84640+SOURCE1+SOURCE1.0.PDF Restricted Access | 719.04 kB | Adobe PDF |  View/Open |
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