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Table 3 Linear regression analyses of colony counts (y) and levels (x) of dissolved oxygen reduction from that in the control Hoagland’s solution by Phytophthora species and exposure time z

From: Oxygen stress reduces zoospore survival of Phytophthora species in a simulated aquatic system

Species Exposure (h) Intercept ( a) Slope ( b) P
P. megasperma 0 (10 min) 18.2 -1.0 0.0936
  2 11.3 -0.2 0.6267
  4 9.9 -0.8 0.0104
  8 7.4 -0.3 0.2903
  24 8.4 -0.7 0.0292
  48 7.6 -0.9 0.0015
  72 4.5 -0.3 0.0724
P. nicotianae 0 7.8 0.8 0.1067
  2 25.0 -1.2 0.0548
  4 28.5 -2.6 0.0008
  8 12.3 -0.4 0.4421
  24 5.1 -0.2 0.4100
  48 3.6 0.0 0.8670
  72 2.2 0.1 0.3973
P. pini 0 9.1 0.4 0.2462
  2 32.6 -0.3 0.6893
  4 37.2 -2.1 0.0002
  8 20.8 -1.3 < 0.0001
  24 14.4 -0.8 0.0034
  48 7.4 -0.3 0.2382
  72 8.3 -0.5 0.0313
P. tropicalis 0 27.8 -1.8 0.0156
  2 31.4 -1.3 0.0749
  4 29.7 -0.3 0.6712
  8 22.5 -0.1 0.8042
  24 7.8 -0.3 0.1730
  48 0.7 0.4 0.0008
  72 0.4 0.2 0.0079
  1. zLinear model: y = a + bx, in which x = 5.3 - meter readings of dissolved oxygen in the Hoagland’s solutions after being bubbled with pure nitrogen, so 0 ≤ x ≤ 5.3 mg L-1.