Table I. Characteristics of dissimilarly recorded SPs in higher plants

Extra, Extracellular (or apoplastic) recording; Intra, intracellular recording; n.d., not determined. Values shown are ±sd.

StimulusSpecimenExperimental SetupTechnical ApproachLocationDistanceAmplitudeDurationVelocityn
mmmVscm min−1
S. littoralisV. fabaLeaf to leafSubstomatal conductanceExtra250 ± 5111.48 ± 5.0343 ± 172n.d.13
H. vulgaren.d.8.1 ± 4.0201 ± 78n.d.6
CaCl2 (50 mm, approximately 600 s)V. fabaLeaf to leafSubstomatal conductanceExtra313 ± 4822.21 ± 5.543,286 ± 1,2896.45 ± 2.0115
H. vulgare466 ± 7428.38 ± 8.951,803 ± 5955.88 ± 1.537
H/FV. fabaLeaf to leafSubstomatal conductanceExtra424 ± 7618.08 ± 4.154,396 ± 1,9204.98 ± 1.5813
V. fabaBlind piercing278 ± 6711.33 ± 3.755,868 ± 1,2672.23 ± 0.7512
C. maximaBlind piercing377 ± 10816.72 ± 8.96,148 ± 1,8362.81 ± 1.0610
DiverseV. faba, H. vulgareLeaf to leaf, stem to leafSubstomatal conductanceIntra476 ± 159−7.86 ± 3.992,126 ± 1,1635.44 ± 2.0421
Extra486 ± 14520.95 ± 10.22,351 ± 1,2466.27 ± 2.123