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Developmentally regulated organ-, tissue-, and cell-specific expression of calmodulin genes in common wheat

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Abstract

Recently, we reported on the characterization of the calmodulin (CaM) gene family in wheat [44]. We classified wheat CaM genes into four subfamilies (SFs) designated SF-1 to SF-4, each representing a series of homoeoallelic loci on the homoeologous chromosomes of the three genomes of common wheat. Here we studied the expression of these wheat CaM genes in the course of wheat development. Northern blot analysis using SF-specific probes revealed differences in SF expression levels in different organs and stages of development. Subsequently, cell-specific expression of CaM SFs was investigated by in situ RNA hybridization. In developing seeds, all CaM SFs showed highest expression in the embryo and less in the aleurone and in the starchy endosperm. In primary roots, all four CaM SFs were expressed in the root cap, meristematic regions and in differentiating cells. During development of the roots, expression gradually decreased. The wheat glutenin gene, which was used as a control throughout our experiments, was found to be expressed in the starchy endosperm but not in the aleurone, embryos or vegetative tissues. In stems, at advanced stages of growth, differences in cell-specific expression of CaM SFs were found. For example, SF-2 was highly expressed in differentiating phloem fibers. Thus, CaM genes in common wheat exhibit a developmentally regulated organ-, tissue-, cell- and SF-specific expression patterns.

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Author notes

  1. Simcha Lev-Yadun

    Present address: The Zinman Institute of Archaeology, University of Haifa, Haifa, Israel

Authors and Affiliations

  1. Department of Plant Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel

    Tianbao Yang, Moshe Feldman & Hillel Fromm

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  1. Tianbao Yang
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  2. Simcha Lev-Yadun
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  3. Moshe Feldman
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  4. Hillel Fromm
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Yang, T., Lev-Yadun, S., Feldman, M. et al. Developmentally regulated organ-, tissue-, and cell-specific expression of calmodulin genes in common wheat. Plant Mol Biol 37, 109–120 (1998). https://doi.org/10.1023/A:1005902905512

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