synergid degeneration
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2017 ◽  
Vol 114 (24) ◽  
pp. E4877-E4883 ◽  
Author(s):  
Jia-Gang Wang ◽  
Chong Feng ◽  
Hai-Hong Liu ◽  
Qiang-Nan Feng ◽  
Sha Li ◽  
...  

Double fertilization in angiosperms requires the delivery of immotile sperm through pollen tubes, which enter embryo sacs to initiate synergid degeneration and to discharge. This fascinating process, called pollen tube reception, involves extensive communications between pollen tubes and synergids, within which few intracellular regulators involved have been revealed. Here, we report that vacuolar acidification in synergids mediated by AP1G and V-ATPases might be critical for pollen tube reception. Functional loss of AP1G or VHA-A, encoding the γ subunit of adaptor protein 1 or the shared component of two endomembrane V-ATPases, respectively, impaired synergid-controlled pollen tube reception and caused partial female sterility. AP1G works in parallel to the plasma membrane-associated receptor FERONIA in synergids, suggesting that synergid-mediated pollen tube reception requires proper sorting of vacuolar cargos by AP1G. Although AP1G did not mediate the targeting of V-ATPases, AP1G loss of function or the expression of AP1G-RNAi compromised vacuolar acidification mediated by V-ATPases, implying their genetic interaction. We propose that vacuolar acidification might represent a distinct cell-death mechanism specifically adopted by the plant phylum, which is critical for synergid degeneration during pollen tube reception.


2016 ◽  
Vol 11 (8) ◽  
pp. e1209616 ◽  
Author(s):  
Ana Marta Pereira ◽  
Ana Lúcia Lopes ◽  
Sílvia Coimbra

2016 ◽  
Vol 9 (4) ◽  
pp. 601-614 ◽  
Author(s):  
Ana Marta Pereira ◽  
Margarida Sofia Nobre ◽  
Sara Cristina Pinto ◽  
Ana Lúcia Lopes ◽  
Mário Luís Costa ◽  
...  

2015 ◽  
Vol 169 (1) ◽  
pp. 485-496 ◽  
Author(s):  
Alexander R. Leydon ◽  
Tatsuya Tsukamoto ◽  
Damayanthi Dunatunga ◽  
Yuan Qin ◽  
Mark A. Johnson ◽  
...  

2013 ◽  
Vol 25 (3) ◽  
pp. 310-316 ◽  
Author(s):  
Ronny Völz ◽  
Juliane Heydlauff ◽  
Dagmar Ripper ◽  
Ludwig von Lyncker ◽  
Rita Groß-Hardt

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