| Abstract: | Abstract The paclobutrazol (0, 50, 100, 200, and 500 mg L?1) and triapenthenol (175, 350, 700, and 1400 mg L?1) effects on specific leaf area (SLA) and leaf nitrogen (LN) concentration of Lantana camara L. (subsp. camara) under the shading levels 0%, 27%, and 66% were determined in glasshouse experiments. In most cases, increased concentrations of paclobutrazol and triapenthenol decreased SLA and increased LN of plants logarithmically at all shading levels. The SLA, at all concentrations examined, was generally increased with increased shading; LN showed an increase at 66% shading compared to 0% shading in the case of triapenthenol. The SLA reduction of paclobutrazol‐treated plants in relation to untreated plants of the same shading level was 18% to 37%; reduction was 49% to 73% for plants treated with triapenthenol at 0% shading, indicating a greater effect of triapenthenol on SLA reduction than paclobutrazol at previous shading. |
