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Relative aluminium tolerance of ten species of graminae
- Wheeler, D.M.
- Journal of plant nutrition 1995 v.18 no.11 pp. 2305-2312
- Poaceae, aluminum, metal tolerance, crop yield, mineral content, magnesium, potassium, calcium, phosphorus, dry matter accumulation, nutrient content, genotype, species differences
- Ten species (28 genotypes) of Graminae were screened in low ionic strength (2.7 X 10(-3) M) solution culture for aluminum (Al) tolerance. The Al3+ activity (micromolar) that reduced yield by 50% (AlRY50) was determined. The species, in order of increasing Al tolerance (with AlRY50 for the tops shown in parenthesis were Panicum miliaceum (0.4) < Bromus inermis (1.4) < Phleum pratense (2.3) = Bromus stamineus (2.5) = B. sitchensis (2.5) < Lolium perenne (3.3) = L. x boucheanum (3.9) < Oryza sativa (17). An AlRY50 could not be determined for Agrostis castellana or Zea mays although both were tolerant (AlRY50 > 20 micromolar and > 10 micromolar, respectively). Plant element concentrations were determined in five species. Increasing solution Al concentrations increased Al and decreased magnesium (Mg and potassium (K) in the tops and roots, decreased calcium (Ca) in the tops, and increased phosphorus (P) in the roots.