Cadmium toxicity in African yam bean (Sphenostylis stenocarpa (HOCHST. EX A.RICH.) HARMS genotypes
| Autor: | Beckley Ikhajiagbe, Ephraim Aliu, Edokpolor Osaze Ohanmu, Geoffery Obinna Anoliefo, FA Igiebor, Pascal C. Okoye |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010504 meteorology & atmospheric sciences
cadmium CADMIUM TOXICITY chemistry.chemical_element 01 natural sciences lcsh:Agriculture 0103 physical sciences Genotype Sphenostylis 010303 astronomy & astrophysics 0105 earth and related environmental sciences Water Science and Technology sphenostylis stenocarpa Cadmium biology lcsh:S toxicity heavy metal biology.organism_classification Sphenostylis stenocarpa yield African yam-bean Horticulture chemistry Seedling Soil water General Agricultural and Biological Sciences |
| Zdroj: | Acta Agriculturae Slovenica, Vol 114, Iss 2, Pp 205-220 (2019) |
| ISSN: | 1854-1941 1581-9175 |
| Popis: | The aim of the study was to investigate the growth responses of African yam bean (Sphenostylis sternocarpa (Hochst. ex A. Rich.) Harms (AYB) to cadmium pollution. Top garden soil (0 – 10 cm) was obtained as pooled and polluted with cadmium (as CdCl2) at the rate of 12 mg kg-1, which is equivalent to 3 times the ecotoxicological screening value of Cd. The polluted soils were made ready for use 3 days later. Nine selected AYB accessions (TSs-87, TSs-89, TSs-90, TSs-91, TSs-92, TSs-93, TSs-94, TSs-95, and TSs-96) were pre-soaked for 30 minutes and then sown in the polluted and unpolluted soils. Data collected were subjected to ANOVA, and means were separated at 95 % confidence interval. Results showed that incidence of cadmium pollution significantly delayed seedling emergence in all tested AYB accessions by at least one day (p < 0.05). Despite exposure to Cd, TSs-96 attained 50 % emergence faster than other accessions. Although there were general reductions in yield due to exposure to Cd, TSs-92 showed the least percentage yield reduction (50 %), compared to 74 % yield reduction in TSs-93, thereby suggesting a comparatively better yield capacity compared to the other test accessions. Overall, decrease in total chlorophyll content seems to be the major reason of injury in Cd-exposed plants. |
| Databáze: | OpenAIRE |
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