مورد إلكتروني
Effect of storage on seed viability and vigour in different Ethiopian wheat and maize cultivars
| العنوان: | Effect of storage on seed viability and vigour in different Ethiopian wheat and maize cultivars |
|---|---|
| المؤلفون: | Engida, Mekonnen Beyene |
| بيانات النشر: | University of the Free State 2000-11 |
| تفاصيل مُضافة: | Pretorius, J. C. Potgieter, G. P. Wheat -- Seeds -- Viability |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | English: Seed viability and vigour loss during storage, is one of the several factors limiting crop yield in Ethiopia. Ambient storage conditions (high temperature and relative humidity) as well as high moisture content during storage are considered to be the most important factors causing inferior quality of seeds (Anonymous, 1995). This supplied the rationale to study the effect of ambient temperature (more or less similar to that applying in Ethiopian conditions) and low temperature (4°C) on seed viability and vigour as well as biochemical and physiological aspects related to seed viability and vigour of Ethiopian bread and durum wheat as well as maize cultivar seeds. Additionally, the effects of storage in open and closed containers at different temperatures were also investigated. Seeds from three bread and durum wheat as well as two maize cultivars were stored at low (4°C) or ambient temperatures (18-30°C) in open or closed containers for a period of six months. Seed viability and vigour as well as biochemical and physiological aspects related to seed viability and vigour were measured before (fresh seeds) and after different storage treatments. Seed viability (germination percentage) and vigour (germination index and dry shoot mass) of seeds from both bread and durum wheat cultivars stored in open containers at ambient temperature were not significantly influenced while the other storage treatments affected the viability and vigour to various degrees. A more or less similar tendency was observed for seeds of the two maize cultivars, when only the raw data was considered. The mentioned storage condition also maintained most of the seed metabolite levels measured in this study. The lower relative humidity of the ambient storage environment contributed to maintain the moisture level of seeds at a much lower level compared to those aged at low temperature. This situation contributed to seeds aged in open containers at ambient temperature in retaining their viabil Afrikaans: Die verlies van saad kiemkragtigheid ("viability") en vitaliteit ("vigour") tydens berging, is een van die faktore wat oesopbrengste van landbougewasse in Etiopië beperk. Saadberging by heersende omgewingstemperatuur (hoë temperatuur en relatiewe humiditeit) asook die hoë voginhoud van saad word beskou as die belangrikste faktore wat aanleiding gee tot swak saadkwaliteit (Anoniem, 1995). Laasgenoemde het die rasionaal verskaf om die effek van bergingstoestande (kamertemperatuur, wat min of meer ooreenstem met heersende toestande in Etiopië, asook berging by lae temperatuur, 4°C) op saad kiemkragtigheid en vitaliteit in brood en durum koring, asook mielie cultivars, te ondersoek. Daarby is die invloed van berging in oop en geslote houers by verskillende temperature op saad kiemkragtigheid en vitaliteit ook ondersoek. Aandag is ook gegee aan die invloed van berging op biochemiese en fisiologiese aspekte wat met saad kiemkragtigheid en vitaliteit verband hou. Saad van drie Etiopiese brood- en durum koring, asook twee mielie cultivars, is by lae temperatuur (4°C) of kamertemparatuur (18-300C) in oop en geslote houers geberg vir ses maande. Saad kiemkragtigheid en vitaliteit, asook biochemiese en fisiologiese aspekte wat hiermee verband hou/is deur middel van verskillende tegnieke voor (vars saad) en na berging bepaal. Saad kiemkragtigheid (persentasie kieming) en vitaliteit (kiemingsindeks en droë biomassa van jong saailinge) van beide brood en durum koringsaad is nie noemenswaardig deur berging in oop houers by kamertemperatuur beïnvloed nie maar wel deur die ander bergingsomgewings. 'n Min of meer soortgelyke tendens is by sade van die twee mielie cultivars waargeneem. Metabolietvlakke het by beide koring en mielies tog tydens die bergingstydperk variasies getoon. Die laer relatiewe humiditeit van die kamertemperatuur bergingsomgewing het daartoe bygedra dat die voginhoud van sade ook op 'n laer vlak gehou is in vergelyking met die bergingsomgewing by lae t Ethiopian Seed Enterprise (ESE) |
| مصطلحات الفهرس: | Seeds -- Storage, Dissertation (M.Sc.Agric. (Agronomy and Plant Breeding))--University of the Orange Free State, 2000, Corn -- Seeds -- Viability, UCTD, Dissertation |
| URL: | |
| الإتاحة: | Open access content. Open access content University of the Free State |
| ملاحظة: | application/pdf English |
| أرقام أخرى: | Y$R oai:scholar.ufs.ac.za:11660/8223 1144172326 |
| المصدر المساهم: | UNIV OF THE FREE STATE 4300 From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1144172326 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |