The block of intracellular calcium release affects the pollen tube development of Picea wilsonii by changing the deposition of cell wall components.

Protoplasma
Kun-Ming ChenJin-Xing Lin

Abstract

Two potent drugs, neomycin and TMB-8, which can block intracellular calcium release, were used to investigate their influence on pollen tube growth and cell wall deposition in Picea wilsonii. Apart from inhibiting pollen germination and pollen tube growth, the two drugs largely influenced tube morphology. The drugs not only obviously disturbed the generation and maintenance of the tip-localized Ca(2+) gradient but also led to a heavy accumulation of callose at the tip region of P. wilsonii pollen tubes. Fourier transform infrared (FTIR) spectroscopy analysis showed that the deposition of cell wall components, such as carboxylic acid, pectins, and other polysaccharides, in pollen tubes was changed by the two drugs. The results obtained from immunolabeling with different pectin and arabinogalactan protein antibodies agreed well with the FTIR results and further demonstrated that the generation and maintenance of the gradient of cross-linked pectins, as well as the proportional distribution of arabinogalactan proteins in tube cell walls, are essential for pollen tube growth. These results strongly suggest that intracellular calcium release mediates the processes of pollen germination and pollen tube growth in P. wilsonii and its i...Continue Reading

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Citations

Nov 26, 2009·Protoplasma·Jeanmarie Verchot-Lubicz, Raymond E Goldstein
Jul 14, 2012·Journal of Experimental Botany·M C Lombardo, L Lamattina
Aug 21, 2014·Annals of Botany·Derek T A LamportCharlotte E Seal
Feb 24, 2016·Frontiers in Plant Science·Jorge LoraMaría Herrero
Jan 1, 2013·Plants·Jean-Claude MolletArnaud Lehner
Jul 13, 2012·Annals of Botany·Eric Nguema-OnaAzeddine Driouich
May 1, 2021·International Journal of Molecular Sciences·Katarzyna RafińskaElżbieta Bednarska-Kozakiewicz
Jul 3, 2021·Plants·Maria BreyginaOlga Schekaleva

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