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Table 1 Leaf temperature (Tleaf), photosynthetic efficiency (Fv/Fm), stem and minimum water potential (ψstem and ψmin) measured in 5C and Riesling x 5C (RR) plants 8 weeks after the beginning of treatments (n = 5–8). W = well-watered plants; D = drought-stressed; C = control, non-phylloxerated; P = root phylloxerated. * indicates statistically significant differences within the factors (Irrigation or Infestation). A significant interaction between factors (Irr x Inf) was observed in Fv/Fm measured in RR, i.e. within W level: C > P; within P level: W < D

From: Gas exchange, biomass and non-structural carbohydrates dynamics in vines under combined drought and biotic stress

  5C RR
Traits Irrigation Infestation Interaction Irrigation Infestation Interaction
  W D C P Irr x Inf W D C P Irr x Inf
Tleaf, °C 32.6 ± 0.5 33.5 ± 0.6 32.8 ± 0.5 33.3 ± 0.6 n.s. 31.6 ± 0.6 33.5 ± 0.7* 32.1 ± 0.6 33.0 ± 0.7 n.s.
Fv/Fm 0.80 ± 0.01 0.81 ± 0.01 0.80 ± 0.01 0.81 ± 0.01 n.s. 0.78 ± 0.01 0.79 ± 0.01 0.79 ± 0.01 0.77 ± 0.01 *
ψstem, −MPa 0.64 ± 0.03 1.08 ± 0.03* 0.85 ± 0.03 0.87 ± 0.03 n.s. 0.54 ± 0.04 0.89 ± 0.04* 0.72 ± 0.04 0.71 ± 0.04 n.s.
ψmin, −MPa 1.00 ± 0.04 1.29 ± 0.04* 1.08 ± 0.04 1.20 ± 0.04* n.s. 0.82 ± 0.04 1.10 ± 0.05* 0.97 ± 0.04 0.95 ± 0.05 n.s.