Characterization of cadmium uptake by plant tissue.
Jay M. Cutler,D. W. Rains +1 more
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Diffusion, when followed by sequestering, probably accounts for the accumulation of Cd observed in intact barley plants.Abstract:
The uptake of cadmium by excised root tissue of barley (Hordeum vulgare L. cv. Arivat) was investigated with respect to kinetics, concentration, and interactions with various cations. The role of metabolism in Cd absorption was examined using a range of temperatures, anaerobic treatments, and chemical inhibitors. The uptake and distribution of Cd in intact barley plants was also determined. A large fraction of the Cd taken up by excised barley roots was apparently the result of exchange adsorption and was displaced by subsequent desorption with unlabeled Cd, Zn, Cu, or Hg. Another fraction of Cd which could not be displaced by desorption in unlabeled Cd was thought to result from strong irreversible binding of Cd, perhaps on sites of the cell wall. The fraction of the Cd taken up beyond that by exchange adsorption by fresh roots was a linear function of temperature, and inhibited by conditions of low oxygen and by the presence of 2,4-dinitrophenol. It was concluded that this fraction of Cd entered excised barley roots by diffusion. Diffusion, when followed by sequestering, probably accounts for the accumulation of Cd observed in intact barley plants.read more
Citations
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The Physiology of Metal Toxicity in Plants
TL;DR: Aluminum toxicity is discussed in this paper, including general effects (symptoms and physiological effects), differential aluminum tolerance in plants, beneficial effects of aluminum, and the genetic control of aluminum tolerance.
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Studies on cadmium toxicity in plants: a review.
TL;DR: This review emphasises cadmium toxicity on plants with regards to ecological, physiological and biochemical aspects and may help in interdisciplinary studies to assess the ecological significance of metal stress.
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Physiological Aspects of Cadmium and Lead Toxic Effects on Higher Plants
Ilya V. Seregin,V. B. Ivanov +1 more
TL;DR: In this article, the effects of heavy metals on plant metabolism were investigated using the examples of cadmium and lead and the basic mechanisms providing for plant resistance to excess Cd and Pb are elucidated.
Journal ArticleDOI
Characterization of Cadmium Binding, Uptake, and Translocation in Intact Seedlings of Bread and Durum Wheat Cultivars
TL;DR: The results indicate that excess Cd accumulation in durum wheat grain is not correlated with seedling-root influx rates or root-to-shoot translocation, but may be related to phloem-mediated Cd transport to the grain.
Journal ArticleDOI
Cadmium accumulation in crops
TL;DR: Potential methods of reducing the accumulation of Cd in crops include reduction of Cc input to the soil system, site selection, management practices which decrease the concentration of CD in the soil solution and its uptake and translocation by plants, and development and production of plant cultivars with the genetic tendency for low Cd uptake.
References
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Mineral Nutrition in Plants: Principles and Perspectives.
H. David Hammond,Emanuel Epstein +1 more
Book
Mineral Nutrition of Plants: Principles and Perspectives
TL;DR: This chapter discusses the media of Plant Nutrition, nutrition and growth, and the role of transport in the development of sustainable agriculture.
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