Arabidopsis pollen extensins LRX are required for cell wall integrity during pollen tube growth

Sede, Ana R.; Borassi, Cecilia; Wengier, Diego L.; Mecchia, Martin A.; Estevez, Jose M.; Muschietti, Jorge P.


Proper cell wall assembly is crucial during pollen tube growth. Leucine-rich repeat extensins (LRXs) are extracellular glycoproteins which belong to the hydroxyproline-rich glycoprotein (HRGP) family. They contain a conserved N-terminal leucine-rich repeat (LRR) domain and a highly variable C-terminal extensin domain. Here, we characterized four LRX proteins (LRX8 through LRX11) from pollen of Arabidopsis thaliana. To investigate the role of LRX8-LRX11 in pollen germination and pollen tube growth, multiple T-DNA lrx mutants were obtained. The lrx mutants display abnormal pollen tubes with an irregular deposition of callose and pectin. They also show serious alterations in pollen germination and segregation ratio. Our results suggest that LRXs are involved in ensuring proper cell wall assembly during pollen tube growth.

Más información

Título según WOS: ID WOS:000423684200009 Not found in local WOS DB
Título de la Revista: FEBS LETTERS
Volumen: 592
Número: 2
Editorial: Wiley
Fecha de publicación: 2018
Página de inicio: 233
Página final: 243


Notas: ISI