Aluminum and plant age effects on adsorption of cations in the Donnan free space of ryegrass roots

Z. Rengel; D. L. Robinson

doi:10.1007/BF02214551

Aluminum and plant age effects on adsorption of cations in the Donnan free space of ryegrass roots

Z. Rengel, D. L. Robinson

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Abstract

Four cultivars of ryegrass (Lolium multiflorum Lam. cvs. Gulf, Marshall, Urbana, and Wilo) were grown in nutrient solution (pH 4.2) at two Al levels (0 and 74 μM). Cations were desorbed from the Donnan free space of roots of 15-, 23-, and 35-day-old plants using BaCl₂, BaCl₂-triethanolamine, NH₄OAc, and KCl. The amounts of desorbed Ca²⁺ and K⁺ decreased, while desorption of Mn²⁺ and Na⁺ increased with plant age. Differences between 15- and 35-day-old plants, but not between 15- and 23-day-old, were significant. Aluminum considerably decreased the amount of desorbed divalent cations (Ca²⁺, Mg²⁺) and increased the amount of desorbed K⁺ and Na⁺. Ability to resist these changes appeared to be one of the mechanisms determining Al tolerance of ryegrass cultivars.

Original language	English
Pages (from-to)	223-227
Number of pages	5
Journal	Plant and Soil
Volume	116
Issue number	2
DOIs	https://doi.org/10.1007/BF02214551
Publication status	Published - May 1989
Externally published	Yes

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title = "Aluminum and plant age effects on adsorption of cations in the Donnan free space of ryegrass roots",

abstract = "Four cultivars of ryegrass (Lolium multiflorum Lam. cvs. Gulf, Marshall, Urbana, and Wilo) were grown in nutrient solution (pH 4.2) at two Al levels (0 and 74 μM). Cations were desorbed from the Donnan free space of roots of 15-, 23-, and 35-day-old plants using BaCl2, BaCl2-triethanolamine, NH4OAc, and KCl. The amounts of desorbed Ca2+ and K+ decreased, while desorption of Mn2+ and Na+ increased with plant age. Differences between 15- and 35-day-old plants, but not between 15- and 23-day-old, were significant. Aluminum considerably decreased the amount of desorbed divalent cations (Ca2+, Mg2+) and increased the amount of desorbed K+ and Na+. Ability to resist these changes appeared to be one of the mechanisms determining Al tolerance of ryegrass cultivars.",

keywords = "Al tolerance, Donnan free space, exchangeable cations, Lolium multiflorum Lam, plant age, root",

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year = "1989",

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TY - JOUR

T1 - Aluminum and plant age effects on adsorption of cations in the Donnan free space of ryegrass roots

AU - Rengel, Z.

AU - Robinson, D. L.

PY - 1989/5

Y1 - 1989/5

N2 - Four cultivars of ryegrass (Lolium multiflorum Lam. cvs. Gulf, Marshall, Urbana, and Wilo) were grown in nutrient solution (pH 4.2) at two Al levels (0 and 74 μM). Cations were desorbed from the Donnan free space of roots of 15-, 23-, and 35-day-old plants using BaCl2, BaCl2-triethanolamine, NH4OAc, and KCl. The amounts of desorbed Ca2+ and K+ decreased, while desorption of Mn2+ and Na+ increased with plant age. Differences between 15- and 35-day-old plants, but not between 15- and 23-day-old, were significant. Aluminum considerably decreased the amount of desorbed divalent cations (Ca2+, Mg2+) and increased the amount of desorbed K+ and Na+. Ability to resist these changes appeared to be one of the mechanisms determining Al tolerance of ryegrass cultivars.

AB - Four cultivars of ryegrass (Lolium multiflorum Lam. cvs. Gulf, Marshall, Urbana, and Wilo) were grown in nutrient solution (pH 4.2) at two Al levels (0 and 74 μM). Cations were desorbed from the Donnan free space of roots of 15-, 23-, and 35-day-old plants using BaCl2, BaCl2-triethanolamine, NH4OAc, and KCl. The amounts of desorbed Ca2+ and K+ decreased, while desorption of Mn2+ and Na+ increased with plant age. Differences between 15- and 35-day-old plants, but not between 15- and 23-day-old, were significant. Aluminum considerably decreased the amount of desorbed divalent cations (Ca2+, Mg2+) and increased the amount of desorbed K+ and Na+. Ability to resist these changes appeared to be one of the mechanisms determining Al tolerance of ryegrass cultivars.

KW - Al tolerance

KW - Donnan free space

KW - exchangeable cations

KW - Lolium multiflorum Lam

KW - plant age

KW - root

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U2 - 10.1007/BF02214551

DO - 10.1007/BF02214551

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SP - 223

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JO - Plant and Soil

JF - Plant and Soil

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ER -

Aluminum and plant age effects on adsorption of cations in the Donnan free space of ryegrass roots

Abstract

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