Individual Plant Variability in Susceptibility to Potassium Deficiency: Some Observations on Capeweed [Arctotheca calendula (L.) Levyns]
1977; CSIRO Publishing; Volume: 4; Issue: 4 Linguagem: Inglês
10.1071/pp9770499
ISSN1445-4408
Autores Tópico(s)Soil Carbon and Nitrogen Dynamics
ResumoIndividual plants in an apparently uniform set of capeweed seedlings were found to differ markedly in susceptibility to potassium deficiency when grown in solution culture at a constant potassium concentration of 2.6 �M. Large differences were found in dry weight of tops (8-218 mg), tissue potassium concentration (0.3 - 4.8 %) and total potassium in the tops (23-10 500 �g potassium). Dry weight and percentage potassium were positively correlated (r = 0.859, P<0.001) at 2.6 �M potassium but not at higher potassium concentrations. The nature and possible exploitation of such variability in cross-fertilized forage plants are briefly discussed.
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