ArticlePlant physiology1992
Evidence for an Amiloride-Inhibited Mg/2H Antiporter in Lutoid (Vacuolar) Vesicles from Latex of Hevea brasiliensis.
Article in Plant physiology, 1992. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed, 30 citations in OpenAlex.
- Calcium-Dependent Protein Kinase Family Genes Involved in Ethylene-Induced Natural Rubber Production in Different Hevea brasiliensis Cultivars.International journal of molecular sciences · 2018Article
- Tonoplast CBL-CIPK calcium signaling network regulates magnesium homeostasis in Arabidopsis.Proceedings of the National Academy of Sciences of the United States of America · 2015Article
- Phylogeny and a structural model of plant MHX transporters.BMC plant biology · 2013Article
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Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Lutoids represent a lysosomal microvacuolar compartment of rubber-tree (Hevea brasiliensis) latex. We observed acidification of isolated vesicles after imposing an outward Mg(2+) diffusion gradient and dissipation of a preformed pH gradient in the presence of exogenous Mg(2+). These results suggest the presence of a Mg(2+)/H(+) antiporter. The maximum Mg(2+)/H(+) exchange rate was observed at pH 8.5. The K(m) values for Mg(2+) (2.6 mm) were identical for both influx and efflux experiments. When membrane potential was clamped at zero with K(+) and valinomycin, the response of the membrane potential probe oxonol VI showed that the Mg(2+)/H(+) exchange was electroneutral. Mg(2+)/H(+) exchange was inhibited by amiloride and imipramine. Both the inhibiting concentration range and the K(m) for Mg(2+) are similar to those reported for the Mg(2+)/2Na(+) antiporter in animals cell. These data are consistent with the existence of a Mg(2+)/2H(+) antiporter in a plant tonoplast.
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Registered trials
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