Abstract
Investigations have been conducted on a single-gene pea (Pisum sativum L.) mutant which accumulates toxic Fe levels in its older leaves (>1.0% dry weight Fe). Root-associated Fe reductase activity and Fe absorption were determined in +Fe- and −Fe-grown mutant (E107) and normal (’Sparkle’) pea genotypes to elucidate the physiological differences which cause excess Fe accumulation in the mutant. Iron influx in roots of E107 (+/−Fe-grown) or -Fe-grown Sparkle was about four-fold higher than that measured in +Fe-Sparkle. Compared to +Fe-grown Sparkle, roots of the other three growth types also exhibited a greater root-associated reductase activity (4–6 fold higher). The physiological similarities of +Fe-grown E107 with the Fe-deficient E107 or Sparkle, suggest that the E107 mutant functions as a positively induced Fe-deficient dicotyledonous plant.
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© 1990 Kluwer Academic Publishers
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Grusak, M.A., Kochian, L.V., Welch, R.M. (1990). A transport mutant of pea (Pisum sativum) for the study of iron absorption in higher plant roots. In: van Beusichem, M.L. (eds) Plant Nutrition — Physiology and Applications. Developments in Plant and Soil Sciences, vol 41. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0585-6_37
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DOI: https://doi.org/10.1007/978-94-009-0585-6_37
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6751-5
Online ISBN: 978-94-009-0585-6
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