scholarly journals Blazing New Trails (Pollen Tube Guidance in Flowering Plants)

1997 ◽  
Vol 113 (2) ◽  
pp. 307-312 ◽  
Author(s):  
L. K. Wilhelmi ◽  
D. Preuss
Keyword(s):  
Pollen Tube ◽  
Flowering Plants ◽  
Pollen Tube Guidance

scholarly journals Pollen tube guidance by the female gametophyte

Development ◽  
1997 ◽  
Vol 124 (12) ◽  
pp. 2489-2498 ◽  
Author(s):  
S.M. Ray ◽  
S.S. Park ◽  
A. Ray
Keyword(s):  
Pollen Tube ◽  
Long Range ◽  
Female Gametophyte ◽  
Chromosomal Translocation ◽  
Pollen Grains ◽  
Pollen Tubes ◽  
Flowering Plants ◽  
Genetic Studies ◽  
Transmitting Tract ◽  
Pollen Tube Guidance

In flowering plants, pollen grains germinate on the pistil and send pollen tubes down the transmitting tract toward ovules. Previous genetic studies suggested that the ovule is responsible for long-range pollen tube guidance during the last phase of a pollen tube's journey to the female gametes. It was not possible, however, to unambiguously identify the signaling cells within an ovule: the haploid female gametophyte or the diploid sporophytic cells. In an effort to distinguish genetically between these two possibilities, we have used a reciprocal chromosomal translocation to generate flowers wherein approximately half the ovules do not contain a functional female gametophyte but all ovules contain genotypically normal sporophytic cells. In these flowers, pollen tubes are guided to the normal but not to the abnormal female gametophytes. These results strongly suggest that the female gametophyte is responsible for pollen tube guidance, but leave open the possibility that the gametophyte may accomplish this indirectly through its influence on some sporophytic cells.

Female gametophyte-controlled pollen tube guidance

2010 ◽  
Vol 38 (2) ◽  
pp. 627-630 ◽  
Author(s):  
Mihaela-Luiza Márton ◽  
Thomas Dresselhaus
Keyword(s):  
Pollen Tube ◽  
Female Gametophyte ◽  
Cell Communication ◽  
Flowering Plants ◽  
Sperm Cells ◽  
Double Fertilization ◽  
Pollen Tube Guidance ◽  
Communication Events ◽  
Extensive Cell

During the evolution of flowering plants, their sperm cells have lost mobility and are transported from the stigma to the female gametophyte via the pollen tube to achieve double fertilization. Pollen tube growth and guidance is largely governed by the maternal sporophytic tissues of the stigma, style and ovule. However, the last phase of the pollen tube path is under female gametophyte control and is expected to require extensive cell–cell communication events between both gametophytes. Until recently, little was known about the molecules produced by the female gametophyte that are involved in this process. In the present paper, we review the most recent development in this field and focus on the role of secreted candidate signalling ligands.

scholarly journals Interactions between pollen tube and pistil control pollen tube identity and sperm release in the Arabidopsis female gametophyte

2014 ◽  
Vol 42 (2) ◽  
pp. 340-345 ◽  
Author(s):  
Alexander R. Leydon ◽  
Adisorn Chaibang ◽  
Mark A. Johnson
Keyword(s):  
Pollen Tube ◽  
Female Gametophyte ◽  
Flowering Plants ◽  
Flowering Plant ◽  
Pollen Tube Guidance ◽  
Pollen Cell ◽  
Its Gene ◽  
Flowering Plant Species ◽  
Arabidopsis Pollen ◽  
Signalling Systems

Flowering plants have immotile sperm that develop within the pollen cytoplasm and are delivered to female gametes by a pollen tube, a highly polarized extension of the pollen cell. In many flowering plant species, including seed crop plants, hundreds of pollen tubes grow towards a limited number of ovules. This system should ensure maximal fertilization of ovules and seed production; however, we know very little about how signalling between the critical cells is integrated to orchestrate delivery of two functional sperm to each ovule. Recent studies suggest that the pollen tube changes its gene-expression programme in response to growth through pistil tissue and that this differentiation process is critical for pollen tube attraction by the female gametophyte and for release of sperm. Interestingly, these two signalling systems, called pollen tube guidance and pollen tube reception, are also species-preferential. The present review focuses on Arabidopsis pollen tube differentiation within the pistil and addresses the idea that pollen tube differentiation defines pollen tube identity and recognition by female cells. We review recent identification of genes that may control pollen tube–female gametophyte recognition and discuss how these may be involved in blocking interspecific hybridization.

scholarly journals The role of the integuments in pollen tube guidance in flowering plants

2018 ◽  
Vol 221 (2) ◽  
pp. 1074-1089 ◽  
Author(s):  
Jorge Lora ◽  
Thomas Laux ◽  
José I. Hormaza
Keyword(s):  
Pollen Tube ◽  
Flowering Plants ◽  
Pollen Tube Guidance

scholarly journals Arabidopsis HAP2 (GCS1) is a sperm-specific gene required for pollen tube guidance and fertilization

Development ◽  
2006 ◽  
Vol 133 (23) ◽  
pp. 4761-4769 ◽  
Author(s):  
K. von Besser ◽  
A. C. Frank ◽  
M. A. Johnson ◽  
D. Preuss
Keyword(s):  
Pollen Tube ◽  
Specific Gene ◽  
Pollen Tube Guidance

scholarly journals The Central Cell Plays a Critical Role in Pollen Tube Guidance in Arabidopsis

2007 ◽  
Vol 19 (11) ◽  
pp. 3563-3577 ◽  
Author(s):  
Yan-Hong Chen ◽  
Hong-Ju Li ◽  
Dong-Qiao Shi ◽  
Li Yuan ◽  
Jie Liu ◽  
...  
Keyword(s):  
Pollen Tube ◽  
Critical Role ◽  
Central Cell ◽  
Pollen Tube Guidance

scholarly journals Arabinogalactan proteins (AGPs) related to pollen tube guidance into the embryo sac in Arabidopsis

2008 ◽  
Vol 3 (7) ◽  
pp. 455-456 ◽  
Author(s):  
Sílvia Coimbra ◽  
Brian Jones ◽  
Luís Gustavo Pereira
Keyword(s):  
Pollen Tube ◽  
Embryo Sac ◽  
Arabinogalactan Proteins ◽  
Pollen Tube Guidance

Integration of ovular signals and exocytosis of a Ca2+ channel by MLOs in pollen tube guidance

Nature Plants ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Jiang-Guo Meng ◽  
Liang Liang ◽  
Peng-Fei Jia ◽  
Ying-Chun Wang ◽  
Hong-Ju Li ◽  
...  
Keyword(s):  
Pollen Tube ◽  
Pollen Tube Guidance
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