ISSN:
1573-5036
Keywords:
enzyme activity
;
potassium nutrition
;
potato
;
Solanum tuberosum L.
;
starch synthesis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Starch synthesis in potato tubers grown at varied K nutrition 0.1 (K1), 0.25 (K2) and 1.0 mmol K L- nutrient solution (K3) was investigated with particular regard to the activity of selected enzymes (sucrose synthase, UDP-D-glucose pyrophosphatase, starch phosphorylase, amylases) in dependence on tuber K content. Allocation of K to the tubers was nearly the same in all treatments. The activity of enzymes related to tuber K content did not differ significantly. Starch and K content of tubers increased with progressing age, whereas a decrease was observed in growth rate, starch synthesis per day and K uptake per day. Positive correlations between the rates of K uptake, starch production and growth indicate that the dynamic phase of K supply to the tubers is of greater importance for starch synthesizing processes than the influence of total K content.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00009275
