| Autor: |
Nuwamanya, Ephraim, Turyasingura, Christopher, Magumba, Isaac, Katungisa, Arnold, Alicai, Titus |
| Zdroj: |
Proceedings of the National Academy of Sciences, India Section B; 20220101, Issue: Preprints p1-8, 8p |
| Abstrakt: |
Cyanide accumulation within cassava roots is a safety determinant in consumption of cassava products. Promotion of cassava utilization in different applications therefore calls for breeding of varieties with low cyanogenic potential and stability for cyanide content within a given set of environmental conditions. This can be achieved through an understanding of the distribution of cyanide within a root tissue and whether such distribution mechanisms are similar within cassava plant stands, or plant stands within a plot, or in varieties grown within a set of environmental conditions. Thus using a set of four varieties, this study investigated variations in cyanogenic potential within varieties, plant stands of the same variety and different portions of the root within a particular variety. Root dry matter content ranged from 30 to 42% and was significantly different for the different root portions. The cyanogenic variety NASE 3 had higher cyanogenic potential (~ 150 ppm) compared to NASE 14 (66.2 ppm) and NAROCASS 1 (106.3 ppm). Cassava plants from the same variety and environment differed by up to 35% cyanogenic potential. Variations of up to 29% were also observed in the distribution of cyanide along the root. A tissue and time-dependent variation in accumulation of cyanide was observed with low level of variation within the middle root portion indicating possibility of middle portion as representative for estimating whole root cyanogenic potential. The results also indicate that higher sample numbers are needed in reducing the error of determination resulting from the wide differences within roots and plants of the same variety. |
| Databáze: |
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