Drought susceptibility and recovery of transplanted Quercus rubra seedlings in relation to root system morphology

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Table II

Analysis of variance associated with photosynthetic assimilation (A) , transpiration rate (E) , stomatal conductance (g_s), and predawn leaf xylem water potential (Ψ_L) as influenced by moisture stress (M) induced by drought and initial root volume (Rv). (Error degrees of freedom = 48).

		P > F
Sampling date	Source of variation
		A	E	g_s	Ψ_L^†
23 -Aug
	M	0.0001	0.0010	0.0002	0.0008
	Rv	0.0021	0.4748	0.7390	0.0001
	M × Rv	0.0014	0.0061	0.0033	0.0109

4 -Sept
	M	0.0001	0.0001	0.0001	0.0001
	Rv	0.0395	0.0077	0.0394	0.0001
	M × Rv	0.0470	0.0418	0.0587	0.0146

12 -Sept
	M	0.0001	0.0001	0.0001	–
	Rv	0.0050	0.0042	0.0295	–
	M × Rv	0.1856	0.4506	0.7066	–

19 -Sept
	M	0.0001	0.0001	0.0001	0.1664
	Rv	0.0052	0.0665	0.0209	0.0037
	M × Rv	0.3236	0.1638	0.3418	0.6411

26 -Sept
	M	0.0001	0.0001	0.0001	–
	Rv	0.0001	0.0001	0.0001	–
	M × Rv	0.2272	0.0502	0.0762	–

10 -Oct
	M	0.0001	0.0001	0.0001	–
	Rv	0.0001	0.0001	0.0001	–
	M × Rv	0.0323	0.1379	0.0333	–

25 -Oct
	M	0.0029	0.0001	0.0006	0.1540
	Rv	0.0156	0.0162	0.0109	0.0074
	M × Rv	0.4221	0.9214	0.7990	0.7056

^†

− Not determined.