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Distinct short-range ovule signals attract or repel Arabidopsis thaliana pollen tubes in vitro

Journal Article · · BMC Plant Biology
 [1];  [2]
  1. Univ. of Chicago, IL (United States); DOE/OSTI
  2. Univ. of Chicago, IL (United States)

Pollen tubes deliver sperm after navigating through flower tissues in response to attractive and repulsive cues. Genetic analyses in maize and Arabidopsis thaliana and cell ablation studies in Torenia fournieri have shown that the female gametophyte (the 7-celled haploid embryo sac within an ovule) and surrounding diploid tissues are essential for guiding pollen tubes to ovules. The variety and inaccessibility of these cells and tissues has made it challenging to characterize the sources of guidance signals and the dynamic responses they elicit in the pollen tubes. Here we developed an in vitro assay to study pollen tube guidance to excised A. thaliana ovules. Using this assay we discerned the temporal and spatial regulation and species-specificity of late stage guidance signals and characterized the dynamics of pollen tube responses. We established that unfertilized A. thaliana ovules emit diffusible, developmentally regulated, species-specific attractants, and demonstrated that ovules penetrated by pollen tubes rapidly release diffusible pollen tube repellents. These results demonstrate that in vitro pollen tube guidance to excised A. thaliana ovules efficiently recapitulates much of in vivo pollen tube behaviour during the final stages of pollen tube growth. This assay will aid in confirming the roles of candidate guidance molecules, exploring the phenotypes of A. thaliana pollen tube guidance mutants and characterizing interspecies pollination interactions.

Research Organization:
Univ. of Chicago, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-96ER20240
OSTI ID:
1626507
Journal Information:
BMC Plant Biology, Journal Name: BMC Plant Biology Journal Issue: 1 Vol. 6; ISSN 1471-2229
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English

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Exocytosis-coordinated mechanisms for tip growth underlie pollen tube growth guidance journal November 2017
Mechanistic insights from a quantitative analysis of pollen tube guidance journal February 2010
A novel Arabidopsis marker line that strongly labels uninucleate microspores and the subsequent male gametophyte development stages journal May 2013
The mathematics of sexual attraction journal January 2010
Efficient preparation of Arabidopsis pollen tubes for ultrastructural analysis using chemical and cryo-fixation journal October 2017
Maybe she's NOT the boss: male–female crosstalk during sexual plant reproduction journal May 2016
Pollen differentiation as well as pollen tube guidance and discharge are independent of the presence of gametes journal January 2017
The Arabidopsis KINβγ Subunit of the SnRK1 Complex Regulates Pollen Hydration on the Stigma by Mediating the Level of Reactive Oxygen Species in Pollen journal July 2016
Arabinogalactan Proteins as Interactors along the Crosstalk between the Pollen Tube and the Female Tissues journal December 2016
Simple Culture Methods and Treatment to Study Hormonal Regulation of Ovule Development journal June 2018
The Long Journey of Pollen Tube in the Pistil journal November 2018
The beginning of a seed: regulatory mechanisms of double fertilization text January 2014
Chang's meaning of capacitation: A molecular perspective: C HANG'S M EANING OF C APACITATION journal October 2016
A decade of pollen transcriptomics journal March 2015
Male gametophyte development and function in angiosperms: a general concept journal January 2016
Transcriptomics of Arabidopsis sperm cells at single-cell resolution journal January 2019
Cysteine-rich peptides: signals for pollen tube guidance, species isolation and beyond journal August 2019
Tip-localized receptors control pollen tube growth and LURE sensing in Arabidopsis journal March 2016
Reactive oxygen species mediate pollen tube rupture to release sperm for fertilization in Arabidopsis journal January 2014
Male–female communication triggers calcium signatures during fertilization in Arabidopsis journal August 2014
Live imaging of calcium spikes during double fertilization in Arabidopsis journal August 2014
Using maize as a model to study pollen tube growth and guidance, cross-incompatibility and sperm delivery in grasses journal February 2011
Live-cell imaging of early events following pollen perception in self-incompatible Arabidopsis thaliana journal January 2020
The walls have ears: the role of plant CrRLK1Ls in sensing and transducing extracellular signals journal January 2011
Insights into secrets along the pollen tube pathway in need to be discovered journal March 2019
Arabidopsis and relatives as models for the study of genetic and genomic incompatibilities journal June 2010
Pollen tube-triggered accumulation of NORTIA at the filiform apparatus facilitates fertilization in Arabidopsis thaliana posted_content January 2020
Live-cell imaging of early events following pollen perception in self-incompatible Arabidopsis thaliana posted_content December 2019
Calcium-dependent protein kinases regulate polarized tip growth in pollen tubes journal August 2009
Arabidopsis thaliana GEX1 has dual functions in gametophyte development and early embryogenesis: Dual functions of GEX1 journal August 2011
Diverse cell signalling pathways regulate pollen-stigma interactions: the search for consensus journal July 2008
Cell–cell communication and signalling pathways within the ovule: from its inception to fertilization journal July 2011
Calcium imaging in Arabidopsis pollen cells using G-CaMP5: Calcium imaging in Arabidopsis pollen cells journal April 2018
Phytosulfokine peptide signaling controls pollen tube growth and funicular pollen tube guidance in Arabidopsis thaliana journal October 2014
Arabidopsis COBRA-LIKE 10, a GPI-anchored protein, mediates directional growth of pollen tubes journal March 2013
Antisense gene inhibition by phosphorothioate antisense oligonucleotide in Arabidopsis pollen tubes journal March 2014
ATP binding cassette transporters ABCG1 and ABCG16 affect reproductive development via auxin signalling in Arabidopsis journal February 2020
Egg Cell-Secreted EC1 Triggers Sperm Cell Activation During Double Fertilization journal November 2012
Cysteine-rich peptides promote interspecific genetic isolation in Arabidopsis journal May 2019
Quantitative proteomics of the tobacco pollen tube secretome identifies novel pollen tube guidance proteins important for fertilization journal May 2016
A Species-Specific Cluster of Defensin-Like Genes Encodes Diffusible Pollen Tube Attractants in Arabidopsis journal December 2012
Penetration of the Stigma and Style Elicits a Novel Transcriptome in Pollen Tubes, Pointing to Genes Critical for Growth in a Pistil journal August 2009
Correction: Penetration of the Stigma and Style Elicits a Novel Transcriptome in Pollen Tubes, Pointing to Genes Critical for Growth in a Pistil journal July 2016
The beginning of a seed: regulatory mechanisms of double fertilization journal September 2014
Amborella trichopoda (Amborellaceae) and the evolutionary developmental origins of the angiosperm progamic phase journal January 2009
Efficient preparation of Arabidopsis pollen tubes for ultrastructural analysis using chemical and cryo-fixation text January 2017
The walls have ears: the role of plant CrRLK1Ls in sensing and transducing extracellular signals text January 2011
Egg cell-secreted EC1 triggers sperm cell activation during double fertilization text January 2012

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