Aluminium toxicity expression nutrient uptake, growth and root morphology ofTrifolium repens L. cv. ‘Grasslands Huia’

Lee, J.; Pritchard, M. W.

doi:10.1007/bf02220774

Cited by 35 publications

(12 citation statements)

References 25 publications

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“…By calculating the ratio between the mean of the shoot nutrient contents and net uptake, the mean of nutrients translocation was calculated for 34-day old plants (Table 6). In agreement with Lee and Pritchard ( 1984), N and Ca translocation from roots to the shoot was inhibited (at 0 and 3.00 mM Al to 89% and 94%, respectively). This possibly occurred because of a specific Al adsorption mechanism (Huette and Menary, 1979).…”

Section: Aluminum Effects On Nutrient Uptake and Translocationsupporting

confidence: 83%

Aluminum toxicity in maize: Biomass production and nutrient uptake and translocation

Lidon

Azinheira

Barreiro³

2000

Journal of Plant Nutrition

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The effect of increasing aluminum (A1) concentrations on root nutrient contents along with the concurrent translocation to the shoot of C 4 plants prompted this study. Two-week-old maize (Zea mays cv XL-72.3) plants were therefore submitted for 20 days to A1 concentrations ranging from 0 to 3.00 mM in a medium with low ionic strength were used as a test system. Aluminum concentrations in root tissues showed a 3-fold increase between 0 and 3.00 mM A1 treatment, and was not detected in the shoot. Root plasma membrane-H + ATPase activity decreased after the 0.33 mg L -1 Al treatment, while

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Section: Aluminum Effects On Nutrient Uptake and Translocationsupporting

confidence: 83%

Aluminum toxicity in maize: Biomass production and nutrient uptake and translocation

Lidon

Azinheira

Barreiro³

2000

Journal of Plant Nutrition

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“…Root and shoot development were decreased at 81 mg L' 1 of Al (Table 2). Our data were in agreement with other results (Lee and Pritchard, 1984;Simon et al, 1994). The inhibition of biomass production at high Al concentration in the growth medium has been recognized as a symptom of Al toxicity (Delhaize and Ryan, 1995).…”

Section: Resultssupporting

confidence: 95%

Threshold aluminum toxicity in maize

Lidon

Barreiro²

1998

Journal of Plant Nutrition

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The threshold value of aluminum (Al) toxicity in maize was determined by growing two-week-old plants for 20 days in a medium with low ionic strength having Al concentrations ranging from 0 to 81 mg L-1 . It was found that biomass production decreased in both roots and shoot at 81 mg L-1 Al. The maize plants grown displayed two distinct Al accumulation phases in roots. A slow phase accumulation occurred between 0 and 9 mg L" 1 Al, and a faster phase between 9 and 81 mg L-1 Al. In both phases, Al content in plant tissue increased with Al concentration in the nutrient solution. Threshold toxicity, as expressed by reduced root length, was found to be 13 µg g-1 Al in plant tissue. 413

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“…Taylor (1988) questions this hypothesis despite the mounting evidence supporting a role for nitrogen nutrition in influencing the direction and magnitude of the observed pH changes. Perhaps the biggest conceptual problem concerns those experiments (Bennet et al, 1987;Kinraide, 1988;Lee and Pritchard, 1984) that connect AI treatment to proton extrusion (H + efflux) since this could have the opposite effect leading to a rapid acidification of the root zone. The mechanism(s) involved appear to be connected to membrane hyperpolarization (Kinraide, 1988;Smith and Raven, 1979), where membrane-bound electrogenic pumps function to stabilise membrane potential through the transport of protons (Spanswick, 1981).…”

Section: Can the Root Protect Itself From Aluminium?mentioning

confidence: 99%

The aluminium signal: New dimensions to mechanisms of aluminium tolerance

Bennet

Breen

1991

Plant Soil

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The physiological basis of plant reaction to and tolerance of aluminium (AI) is poorly understood. We review the results of investigations into A1 toxicity and root physiology to develop a theoretical basis for explaining the reaction of the root to AI, including suggested roles for Ca 2+, mucilaginous cap secretions and endogenous growth regulators in mediating a transmitted response between Al-damaged cap cells and the interacting cell populations of the cap and root.This information is used to identify possible mechanisms of A1 tolerance, notably involving signal transduction, A1 uptake pathways and root morphogenesis; and to briefly discuss how procedures selecting for AI tolerance may be improved by incorporating the concept of stimulus-response coupling.Similarities in the responses of roots to A1 and other signals (e.g. gravity, light, mechanical impedance) are used to develop the hypothesis that roots respond to environmental signals by way of a common regulatory system. New research prospects for extending our perception of A1 tolerance mechanisms are identified.

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Aluminium toxicity expression nutrient uptake, growth and root morphology ofTrifolium repens L. cv. ‘Grasslands Huia’

Cited by 35 publications

References 25 publications

Aluminum toxicity in maize: Biomass production and nutrient uptake and translocation

Aluminum toxicity in maize: Biomass production and nutrient uptake and translocation

Threshold aluminum toxicity in maize

The aluminium signal: New dimensions to mechanisms of aluminium tolerance

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