Relation of Increased Potassium Nutrition to Photosynthesis and Translocation of Carbon
Document Type
Article
Publication Date
1-1-1983
Publication Source
Plant Physiology
Abstract
Effects of supplying K+ at 2 or 10 millimolarity concentration on net carbon exchange and translocation of products of photosynthesis were studied in plants of Beta vulgaris L. (var. Klein E). Transport of K+ into and out of leaves was studied with 42K over a 3-day period. Increasing the K+ supplied to the roots from 2 millimolarity, a level just sufficient to overcome obvious deficiency symptoms, to 10 millimolarity resulted in a gradual accumulation of K+ per unit area and an increased export of K+ to sink regions. No significant increase in net carbon exchange was observed in leaves that had accumulated a high level of K+per unit area. Initiation rate, total area, and total fresh weight of leaves of plants with K+ supplied at 10 millimolarity was similar to that for leaves from plants at a 2 millimolarity level. Shoot/root ratio and dry weight accumulation, which are indicative of translocation and partitioning over the long term, were independent of K+ supply in the 2 to 10 millimolarity range. Accumulation of K+ by exporting leaves and its subsequent recirculation to sinks increased when K+ supply was increased in this range but did not appear to affect carbon nutrition even after a long period.
Inclusive pages
141-144
ISBN/ISSN
0032-0889
Publisher
American Society of Plant Biologists
Volume
71
Peer Reviewed
yes
eCommons Citation
Geiger, Donald R. and Conti, Terrance R., "Relation of Increased Potassium Nutrition to Photosynthesis and Translocation of Carbon" (1983). Biology Faculty Publications. 71.
https://ecommons.udayton.edu/bio_fac_pub/71
