Abstract
Germination of Agrostis castellana caryopses is not affected by arsenate. The viability of caryopses of tolerant Agrostis castellana is lower than that of sensitive populations. The possible relation with ‘cost’ of tolerance is discussed. Tolerant populations of Agrostis castellana and Agrostis delicatula are clearly distinguished by their maximum root growth (MRG) from sensitive populations. The sensitive population of Agrostis castellana reaches 50% MRG reduction at 25 μM As, that of Agrostis delicatula at 60 μM As. The tolerant populations of both species do not reach 100% MRG reduction below 1280 μM As. Among the tolerant populations of Agrostis castellana we distinguish a more tolerant population with no significant MRG reduction in the range of 0–40 μM As from two tolerant populations with 10–25% MRG reduction in the same range. 50% MRG reduction occurs finally in the more tolerant population at 580 μM As, in the other tolerant populations at 320 and 230 μM As, respectively. Tolerant and sensitive populations grown without arsenate do not show significant differences in MRG. The relation between MRG and tolerance mechanisms is discussed. ei]Section editor: B E Clothier
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De Koe, T., Jaques, N.M.M. Arsenate tolerance in Agrostis castellana and Agrostis delicatula . Plant Soil 151, 185–191 (1993). https://doi.org/10.1007/BF00016283
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DOI: https://doi.org/10.1007/BF00016283