Waterlogging modifies growth, water use and ion concentrations in seedlings of salt-treated Eucalyptus camaldulensis, E. tereticornis, E. robusta and E. globulus
1993
Marcar, N.E. (Commonwealth Scientific and Industrial Research Organisation, Canberra (Australia). Div. of Forestry)
In a glasshouse experiment, seedlings, 4-5 months old, established in free-draining sand-filled pots, were treated with either 150 (experiment 1) or 100 (experiment 2) mol per cu m NaCl with and without waterlogging for approximately 4 weeks; a waterlogging pretreatment of 3 weeks was included in experiment 2. Salt X waterlogging (SW) significantly reduced seedling growth for all species whereas growth under NaCl (S) or waterlogging (W) treatment alone was not significantly affected, except for E. robusta. In addition SW significantly reduced leaf stomatal conductance and whole-plant water use and increased leaf and stem Na and Cl ion concentrations. Pretreatment with waterlogging (experiment 2) significantly improved growth (particularly for E. globulus) and reduced the concentrations of Na and Cl ions in leaves under SW treatment. E. camaldulensis showed least growth reduction and symptom development with addition of S, W and SW in these experiments.
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