Table 2.
Pearson product moment correlations between the average chemical composition [lipids, LIP; lignin, LIG; total soluble phenols, PHE; protein, PRO; cellulose, CEL; hemicellulose, HCE; starch, STA; total soluble sugars, TSS; organic acids, OA; minerals, MIN; amino acids, AA; total methylxanthine alkaloids, ALK; nitrogen, N; carbon, C; heat of combustion, Hc; leaf construction costs determined according to Williams et al. (1987), CCW; leaf construction costs determined according to Poorter (1994), CCP; total maintenance costs, MC; mass–based net carbon assimilation rate, Am; mass–based respiration rate, Rm; carbon isotope composition ratio, δ13C; payback times, PBT; specific leaf area, SLA; and relative growth rate, RGR] of coffee plants grown under contrasting light and water conditions; n=40; *P ≤0.05, **P ≤0.01, ***P ≤0.001 and ns P >0.05.
LIG | PHE | PRO | CEL | HCE | STA | TSS | OA | MIN | AA | ALK | N | C | Hc | CCW | CCP | MC | Am | Rm | δ13C | PBT | SLA | RGR | |
LIP | –0.12ns | 0.16ns | 0.10ns | –0.09ns | –0.24ns | –0.30* | 0.17ns | 0.08ns | –0.33* | 0.46** | 0.25ns | 0.12ns | 0.16 ns | 0.32* | 0.35* | 0.23ns | 0.57*** | –0.26ns | 0.04ns | 0.35* | 0.17ns | 0.13ns | 0.06ns |
LIG | 0.19ns | –0.15ns | –0.48*** | 0.20ns | –0.17ns | 0.04ns | –0.24ns | 0.14ns | –0.06ns | 0.20ns | 0.17ns | 0.18 ns | 0.11ns | 0.09ns | 0.27* | 0.20ns | 0.07 ns | 0.27* | 0.27* | –0.03ns | –0.30* | 0.12ns | |
PHE | 0.15ns | –0.76*** | –0.92*** | –0.10ns | 0.62*** | –0.84*** | –0.77*** | 0.61*** | 0.88*** | 0.32* | 0.82*** | 0.73*** | 0.83*** | 0.89*** | 0.25ns | 0.64*** | 0.80*** | 0.72*** | –0.31* | –0.79*** | 0.61*** | ||
PRO | –0.21ns | –0.24ns | –0.55*** | –0.12ns | 0.01ns | –0.03ns | 0.50*** | 0.04ns | 0.56*** | 0.13ns | 0.40** | 0.35* | 0.40* | 0.77*** | –0.22 ns | 0.02ns | 0.10ns | 0.15ns | –0.35* | 0.09ns | |||
CEL | 0.73*** | 0.07ns | –0.60*** | 0.56*** | 0.65*** | –0.47** | –0.78*** | –0.15ns | –0.76*** | –0.71*** | –0.73*** | –0.75*** | –0.34* | –0.37** | –0.67*** | –0.71*** | 0.36* | 0.59*** | –0.51*** | ||||
HCE | –0.06ns | –0.76*** | 0.74*** | 0.79*** | –0.63*** | –0.70*** | –0.17ns | –0.66*** | –0.79*** | –0.86*** | –0.81*** | –0.37* | –0.56*** | –0.55*** | –0.54*** | 0.45** | 0.74*** | –0.55*** | |||||
STA | 0.40* | –0.23ns | –0.14ns | –0.25ns | –0.07ns | –0.49*** | 0.11ns | 0.08ns | 0.08ns | –0.11ns | –0.55*** | 0.67*** | –0.12ns | –0.12ns | –0.74*** | 0.11ns | 0.38** | ||||||
TSS | –0.46** | –0.74*** | 0.19ns | 0.50*** | –0.43** | 0.56*** | 0.67*** | 0.69*** | 0.46** | 0.17ns | 0.75*** | 0.48*** | 0.45** | –0.72*** | –0.44** | 0.56*** | |||||||
OA | 0.59*** | –0.42** | –0.72*** | –0.40** | –0.63*** | –0.52*** | –0.65*** | –0.74*** | 0.05ns | –0.61*** | –0.43** | –0.40* | 0.49*** | 0.73*** | –0.60*** | ||||||||
MIN | –0.28* | –0.58*** | 0.10ns | –0.66*** | –0.63*** | –0.74*** | –0.64*** | –0.02ns | –0.44** | –0.54*** | –0.70*** | 0.36* | 0.44** | –0.52*** | |||||||||
AA | 0.67*** | 0.60*** | 0.58*** | 0.67*** | 0.68*** | 0.74*** | 0.67*** | 0.34* | 0.24ns | 0.55*** | 0.18ns | –0.61*** | 0.44** | ||||||||||
ALK | 0.28* | 0.81*** | 0.61*** | 0.71*** | 0.85*** | 0.22ns | 0.51*** | 0.76*** | 0.79*** | –0.22ns | –0.82*** | 0.60*** | |||||||||||
N | –0.01ns | 0.19ns | 0.24ns | 0.53*** | 0.35* | –0.50*** | –0.01ns | 0.06ns | 0.41** | –0.54*** | –0.42** | ||||||||||||
C | 0.80*** | 0.83*** | 0.97*** | 0.21 ns | 0.62*** | 0.76*** | 0.72*** | –0.46** | –0.60*** | 0.69*** | |||||||||||||
Hc | 0.98*** | 0.83*** | 0.54*** | 0.58*** | 0.52*** | 0.58*** | –0.44** | –0.65*** | 0.69*** | ||||||||||||||
CCW | 0.91*** | 0.45** | 0.47*** | 0.55*** | 0.64*** | –0.45** | –0.70*** | 0.67*** | |||||||||||||||
CCP | 0.45** | 0.58*** | 0.75*** | 0.75*** | –0.27* | –0.82*** | 0.44** | ||||||||||||||||
MC | 0.31* | 0.08ns | 0.26ns | 0.15ns | –0.41* | 0.07ns | |||||||||||||||||
Am | 0.51*** | 0.31* | –0.83*** | –0.43** | 0.76*** | ||||||||||||||||||
Rm | 0.63*** | –0.18ns | –0.77*** | 0.44** | |||||||||||||||||||
δ13C | –0.28* | –0.29* | 0.46** | ||||||||||||||||||||
PBT | 0.23ns | –0.67*** | |||||||||||||||||||||
SLA | –0.27* |