Geographic isolates of Glomus increase root growth and whole-plant transpiration of Citrus seedlings grown with high phosphorus

M. W. Fidelibus, Chris Martin, J. C. Stutz

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Four Glomus species/isolates from arid, semiarid and mesic areas were evaluated for their effects on growth and water use characteristics of young Citrus volkameriana ('Volkamer' lemon) under well-watered conditions, followed by three soil-drying episodes of increasing severity (soil moisture tensions of -0.02, -0.06, and -0.08 MPa) and recovery conditions. Arbuscular mycorrhizal (AM) plants were also compared to non-AM plants given extra phosphorus (P) fertilizer. AM plants and non-AM plants had similar shoot size (dry weight and canopy area), but all AM fungus treatments stimulated root growth (dry weight and length). Leaf P concentrations were 12-56% higher in AM plants than non-AM plants. Enhanced root growth was positively correlated with leaf P concentration. In general, AM plants had greater whole-plant transpiration than non-AM plants under well-watered conditions, under mild water stress and during recovery from moderate and severe soil drying. This suggests a taster recovery from moisture stress by AM plants. AM plants had lower leaf conductance than non-AM plants when exposed to severe soil drying. Although the greatest differences were between AM and non-AM plants, plants treated with Glomus isolates differed in colonization level, leaf P concentration, root length, transpiration flux and leaf conductance.

Original languageEnglish (US)
Pages (from-to)231-236
Number of pages6
JournalMycorrhiza
Volume10
Issue number5
DOIs
StatePublished - 2001

Fingerprint

Plant Transpiration
Citrus
Glomus
Seedlings
transpiration
Phosphorus
root growth
seedling
phosphorus
seedlings
Growth
Soil
Citrus limonia
leaf conductance
drying
Weights and Measures
well
leaves
soil

Keywords

  • Arbuscular mycorrhizae
  • Conductance
  • Water stress

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Plant Science

Cite this

Geographic isolates of Glomus increase root growth and whole-plant transpiration of Citrus seedlings grown with high phosphorus. / Fidelibus, M. W.; Martin, Chris; Stutz, J. C.

In: Mycorrhiza, Vol. 10, No. 5, 2001, p. 231-236.

Research output: Contribution to journalArticle

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