ArticlePlanta2015
Calreticulin expression in relation to exchangeable Ca(2+) level that changes dynamically during anthesis, progamic phase, and double fertilization in Petunia.
Article in Planta, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 17 citations in OpenAlex.
- Molecular cloning and the expression profile of two calnexin genes - CNX1 and CNX2 - during pollen development and pollen tube growth in Petunia.BMC plant biology · 2025Article
- Plant-specific calreticulin is localized in the nuclei of highly specialized cells in the pistil-new observations for an old hypothesis.Protoplasma · 2024Article
- Comprehensive genomic characterization and expression analysis of calreticulin gene family in tomato.Frontiers in plant science · 2024Article
- RNAi-Mediated Knockdown of Calreticulin3a Impairs Pollen Tube Growth inInternational journal of molecular sciences · 2022Article
- Calreticulin expression and localization in relation to exchangeable CaBMC plant biology · 2022Article
- Article
- Dynamic distribution of ARGONAUTE1 (AGO1) and ARGONAUTE4 (AGO4) in Hyacinthus orientalis L. pollen grains and pollen tubes growing in vitro.Protoplasma · 2020Article
- Cytosolic calcium localization and dynamics during early endosperm development in the genus Agave (Asparagales, Asparagaceae).Protoplasma · 2019Article
- Calcium: A Critical Factor in Pollen Germination and Tube Elongation.International journal of molecular sciences · 2019Review
- Calreticulin localizes to plant intra/extracellular peripheries of highly specialized cells involved in pollen-pistil interactions.Protoplasma · 2018Article
- Calreticulin is required for calcium homeostasis and proper pollen tube tip growth in Petunia.Planta · 2017Article
- Late progamic phase and fertilization affect calreticulin expression in the Hyacinthus orientalis female gametophyte.Plant cell reports · 2015Article
- Molecular evidence that rough endoplasmic reticulum is the site of calreticulin translation in Petunia pollen tubes growing in vitro.Plant cell reports · 2015Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Calcium (Ca(2+)) plays essential roles in plant sexual reproduction, but the sites and the mechanism of Ca(2+) mobile storage during pollen-pistil interactions have not been fully defined. Because the Ca(2+)-buffering protein calreticulin (CRT) is able to bind and sequester Ca(2+), it can serve as a mobile intracellular store of easily releasable Ca(2+) and control its local concentration within the cytoplasm. Our previous studies showed an enhanced expression of Petunia hybrida CRT gene (PhCRT) during pistil transmitting tract maturation, pollen germination and tube outgrowth on the stigma, gamete fusion, and early embryogenesis. Here, we demonstrate that elevated expression of CRT results in the accumulation of this protein in response to anthesis, pollination, sperm cells deposition within the receptive synergid and fertilization, when the level of exchangeable Ca(2+) changes dynamically. CRT localizes mainly to the endoplasmic reticulum and Golgi compartments in the pistil transmitting tract cells, germinated pollen/tubes, and sporophytic/gametophytic cells of the ovule and corresponds with loosely bound Ca(2+). Additionally, the immunogold research shows, for the first time, highly selective CRT distribution in specific nuclear sub-domains. On the basis of our results, we discuss the possible functions of CRT with respect to the critical role of Ca(2+) homeostasis during key events of the multi-step process of generative reproduction in angiosperms.
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