ArticleThe Plant cell2006
Calcium-dependent protein kinase isoforms in Petunia have distinct functions in pollen tube growth, including regulating polarity.
Article in The Plant cell, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 72 papers.
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Who cites it
72 citing papers in PubMed, 140 citations in OpenAlex.
- Calcium-dependent protein kinase signalling in plant immune responses: current status and future prospects.Planta · 2026Review
- Calcium-Dependent Protein Kinases in Plants: Structure, Signaling, and Multifaceted Regulatory Roles in Development and Stress Adaptation.International journal of molecular sciences · 2026Review
- Article
- Transcriptomic Analysis of Self-Incompatibility in Alfalfa.Plants (Basel, Switzerland) · 2024Article
- Calmodulin-Domain Protein Kinase PiCDPK1 Interacts with the 14-3-3-like Protein NtGF14 to Modulate Pollen Tube Growth.Plants (Basel, Switzerland) · 2024Article
- Transcriptome Analysis of the Late-Acting Self-Incompatibility Associated with RNase T2 Family inPlants (Basel, Switzerland) · 2023Article
- Signaling network controlling ROP-mediated tip growth in Arabidopsis and beyond.Plant communications · 2023Review
- Flower transcriptional response to long term hot and cold environments inFrontiers in plant science · 2023Article
- Let's shape again: the concerted molecular action that builds the pollen tube.Plant reproduction · 2022Review
- Genome-Wide Identification and Characterization of CDPK Family Reveal Their Involvements in Growth and Development and Abiotic Stress in Sweet Potato and Its Two Diploid Relatives.International journal of molecular sciences · 2022Article
- Calmodulin Domain Protein Kinase PiCDPK1 Regulates Pollen Tube Growth Polarity through Interaction with RhoGDI.Plants (Basel, Switzerland) · 2022Article
- The role of CDPKs in plant development, nutrient and stress signaling.Frontiers in genetics · 2022Review
- Article
- The Role of Calcium/Calcium-Dependent Protein Kinases Signal Pathway in Pollen Tube Growth.Frontiers in plant science · 2021Review
- Signalling Pinpointed to the Tip: The Complex Regulatory Network That Allows Pollen Tube Growth.Plants (Basel, Switzerland) · 2020Review
- Signaling in Pollen Tube Growth: Beyond the Tip of the Polarity Iceberg.Plants (Basel, Switzerland) · 2019Review
- Proteins with calmodulin-like domains: structures and functional roles.Cellular and molecular life sciences : CMLS · 2019Review
- Transcriptomic Analysis Reveals a Comprehensive Calcium- and Phytohormone-Dominated Signaling Response inInternational journal of molecular sciences · 2019Article
- Simultaneous imaging and functional studies reveal a tight correlation between calcium and actin networks.Proceedings of the National Academy of Sciences of the United States of America · 2018Article
- A calcium-dependent protein kinase, ZmCPK32, specifically expressed in maize pollen to regulate pollen tube growth.PloS one · 2018Article
12 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
Abstract
Calcium is a key regulator of pollen tube growth, but little is known concerning the downstream components of the signaling pathways involved. We identified two pollen-expressed calmodulin-like domain protein kinases from Petunia inflata, CALMODULIN-LIKE DOMAIN PROTEIN KINASE1 (Pi CDPK1) and Pi CDPK2. Transient overexpression or expression of catalytically modified Pi CDPK1 disrupted pollen tube growth polarity, whereas expression of Pi CDPK2 constructs inhibited tube growth but not polarity. Pi CDPK1 exhibited plasma membrane localization most likely mediated by acylation, and we present evidence that suggests this localization is critical to the biological function of this kinase. Pi CDPK2 substantially localized to as yet unidentified internal membrane compartments, and this localization was again, at least partially, mediated by acylation. In contrast with Pi CDPK1, altering the localization of Pi CDPK2 did not noticeably alter the effect of overexpressing this isoform on pollen tube growth. Ca(2+) requirements for Pi CDPK1 activation correlated closely with Ca(2+) concentrations measured in the growth zone at the pollen tube apex. Interestingly, loss of polarity associated with overexpression of Pi CDPK1 was associated with elevated cytosolic Ca(2+) throughout the bulging tube tip, suggesting that Pi CDPK1 may participate in maintaining Ca(2+) homeostasis. These results are discussed in relation to previous models for Ca(2+) regulation of pollen tube growth.
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