Fig. 1.
Seasonal root production (±1 SE) for root systems of V. berlandieri×V. rupestris cv. 1103P and V. riparia×V. rupestris cv. 101-14Mgt (season×root system interaction: P=0.002). Data represent total root length produced cm−2 of observational window over three month periods for the years, 2003–2005. Each season corresponded to the following months: Autumn, September–November (significance of difference between 1103P and 101-14Mgt, P=0.328); winter, December–February (P=0.009), spring, March–May (P=0.230), and summer, June–August (P=0.032). (Bauerle et al., 2008b). Reprinted with the permission of The New Phytologist (Chesire England UK).