VARIATION IN ALUMINUM TOLERANCE AMONG AND WITHIN LOTUS LINES

Previous studies with one cultivar of each of two Lotus species showed that L. pedunculatus cv. Grasslands Maku is Al-tolerant while L. corniculatus cv. Maitland is Al-sensitive. However, little information exists on the relative Al-tolerance of other lines in these species or on the variability within lines in response to Al. Two solution culture experiments were conducted to study these aspects. The Al tolerance of Grasslands Maku was confirmed, plant dry mass increasing by > 40 % with 10 to 30 μM monomeric Al in solution. In contrast, the yield of Maitland was decreased by > 80 % at 30 μM Al, as was that of the other two L.corniculatus lines tested, AT-I and AT-U. The FI of a cross between a L. pedunculatus line and a L. corniculatus line (G4712). © 1990, Taylor & Francis Group, LLC. All rights reserved.