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Limitation to Photosynthesis in Pratylenchus penetrans- and Verticillium dahliae-Infected Potato

^a Department of Plant Pathology, 1630 Linden Dr., University of Wisconsin, Madison, WI 53706 USA
^b Dep. of Botany, University of Wisconsin, Madison, WI 53706 USA

View larger version (33K): [in a new window]   Fig. 1 Carbon dioxide response curves (assimilation rate vs. intercellular CO2 concentrations) of young asymptomatic leaves on control plants (C), or plants inoculated with Verticillium dahliae (V), Pratylenchus penetrans (P), or with both pathogens (P+V) measured at (a, b) 16 DAI and (c, d) 42 DAI in Exp. 1 and 2. Each point is an average of four leaves (except treatment P+V in Exp. 2, where each point in part d is an average of three leaves because the fourth plant died due to infection). Bars are standard errors of means

View larger version (19K): [in a new window]   Fig. 2 Light response curves (assimilation rate vs. photosynthetically active radiation) when of young asymptomatic leaves on control plants (C) or plants inoculated with Verticillium dahliae (V), Pratylenchus penetrans (P), or with both pathogens (P+V) in Exp. 2 at (a) 16 DAI and (b) 42 DAI. Each point is an average of four leaves (except treatment P+V in part b, where each point is an average of three leaves because the fourth plant died due to infection)

View larger version (12K): [in a new window]   Fig. 3 Assimilation rate vs. leaf water potential at 42 DAI of young asymptomatic leaves on control plants (C) or plants inoculated with Verticillium dahliae (V), Pratylenchus penetrans (P), or with both pathogens (P+V) in (a) Exp. 1 and (b) Exp. 2. Each point is an average of four leaves (except treatment P+V in Exp. 2, where each point is an average of three leaves because the fourth plant died due to infection). Bars are standard errors of means