Table 1.

Predictions produced from models of plant defences, predicting within- and between-plant variations in thapsigargins within T. garganica

(A) Predicting the general defence strategy in T. garganica
Theory	Prediction
Optimal defence theory (ODT)	A1 T. garganica is highly apparent, and is therefore highly defended
Growth rate hypothesis (GRH)	A2 T. garganica is adapted to low resources, and therefore has high constitutive defences and low induced defences
Growth–differentiation balance hypothesis (GDBH)	A3 Herbivory is a far greater threat than competition; therefore T. garganica is highly defended
(B) Predicting in planta variation of thapsigargins within T. garganica
Theory	Prediction
ODT	B1 Thapsigargins vary in concentration between tissue types, and are highest in reproductive tissue
(C) Predicting intraspecific variation of thapsigargins within T. garganica
Theory	Prediction
ODT	C1a Thapsigargins will increase with increasing herbivory rates
	C1b Thapsigargins will vary in concentration temporally
GRH	C2 Increasing nutrients decrease thapsigargin concentrations
GDBH	C3 Increasing nutrients increase thapsigargin concentrations to a maximum, before declining with further nutrients
Resource exchange model of plant defence (REMPD)	C4 Changing fungal communities are associated with changing thapsigargin concentrations
Intraspecific framework (ISF)	C5a There is a positive correlation between resources and constitutive defences
	C5b Decreasing resources will increase induced defences