Journal Article

Does Aluminum Inhibit Pollen Germination via Extracellular Calmodulin?

Li Geng Ma, Qing Shu Fan, Zheng Quan Yu, Hua Lin Zhou, Fu Suo Zhang and Da Ye Sun

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 41, issue 3, pages 372-376
Published in print March 2000 | ISSN: 0032-0781
Published online March 2000 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/41.3.372
Does Aluminum Inhibit Pollen Germination via Extracellular Calmodulin?

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The effect of aluminum (Al) on pollen germination and its mechanism of action were investigated. Pollen germination and pollen tube elongation were inhibited by Al at pH 4.5. This inhibitory effect was reversed by the addition of purified calmodulin (CaM), whereas neither the calcium binding-protein S-100 nor Al chelator citric acid at the same concentrations had any obvious effect on AIinhibited pollen germination. The presence of either the membrane-impermeable CaM inhibitor anti-CaM antiserum or Ca2+ chelator EGTA completely suppressed the effect of exogenous CaM. These results indicate the involvement of extracellular calmodulin in the short-term effects of Al on pollen germination and pollen tube elongation.

Keywords: Al; Extracellular calmodulin; Pollen germination; Sorbaria kirilowi

Journal Article.  0 words. 

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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