3.1 Trade-off among P. australis traits
The P. australis height traits had obvious positive correlations
with the growth traits of leaf and stem, such as SLA (P<0.01),
leaf area (P<0.01), pitch number (P<0.01), internode
height (P<0.01), and shoot basal diameter (P<0.01).
The SPAD and leaf thickness had significant negative correlations with
other traits (Table 1).
Table 1. Trade-off among P. australis traits.