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Rhizosphere effects on ion concentrations near different root zones of Norway spruce (Picea abies (L.) Karst.) and root types of Douglas-fir (Pseudotsuga menziesii L.) seedlings

Plant and Soil, ISSN: 0032-079X, Vol: 322, Issue: 1, Page: 209-218
2009
  • 10
    Citations
  • 0
    Usage
  • 21
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    10
    • Citation Indexes
      10
  • Captures
    21

Article Description

Micro-suction cups were installed in splitroot rhizotrons to investigate changes of ion concentrations pertaining to different root zones (Norway spruce) or various root types (Douglas-fir). Plant seedlings were grown in mineral soils fertilised with a mix of KMgCa or unfertilised. In Norway spruce, ions accumulated mostly in the rhizosphere near root tips in fertilised soil. Cations (Fe/Mn, Na) and anions (Cl, SO) were depleted in basal root areas in unfertilised soil. In Douglas-fir, ion accumulations (except K in unfertilised soil) occurred in rhizosphere of current-year suberized roots in both fertilised and unfertilised soils. Ion concentrations in rhizosphere of one-year-old suberized roots were highest compared to those of newly-grown or current-year roots in fertilised soil. These data demonstrate that soil solution chemistry clearly differs in rhizosphere of different segments of single roots and various root types. Ion accumulation in rhizosphere may be due to high mass flow transport of ions to root surfaces, and the accumulation of ions in rhizosphere was more distinct for root tips. © Springer Science + Business Media B.V. 2009.

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