Publication Date:
1991-12-01
Description:
Effects of K and P deficiency on polyamines (putrescine, spermine, spermidine, and agmatine) in leaves and roots were investigated in poplar (Populusmaximowiczii Henry) cuttings growing in half-strength Hoagland solution with varying levels of K (0, 0.3, and 3 mM) and P (0, 0.05, and 0.5 mM). Putrescine contents increased in the leaves of plants grown without K and in roots of plants grown in 0.3 mM K and without K. In the absence of K, the putrescine levels in the roots and leaves were 80 and 25 times, respectively, those of the control (3 mM K). The zero-P treatment increased the putrescine content in the leaves and decreased the putrescine content in the roots. The accumulation of putrescine did not appear to be regulated solely by the K status of the plants. The spermine content in the leaves of 0.3 mM K and zero-P treatments decreased compared with the control, as did spermine in the leaves of the zero-P treatment. The spermine content in the leaves of 0.05 mM P treatment was similar to that of the control (0.5 mM P). This work shows that in poplar polyamine levels in leaves and roots are strongly influenced by the nutrient status of the plants.
Print ISSN:
0045-5067
Electronic ISSN:
1208-6037
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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