Reduced expression of selected FASCICLIN-LIKE ARABINOGALACTAN PROTEIN genes associates with the abortion of kernels in field crops of Zea mays (maize) and of Arabidopsis seeds

Juan Ignacio Cagnola, Gonzalo Javier Dumont de Chassart, Silvia Elizabeth Ibarra, Claudio Chimenti, Martiniano María Ricardi, Brent Delzer, Hernán Ghiglione, Tong Zhu, María Elena Otegui, José Manuel Estevez, Jorge José Casal

Resultado de la investigación: Contribución a una revistaArtículo

9 Citas (Scopus)

Resumen

Abortion of fertilized ovaries at the tip of the ear can generate significant yield losses in maize crops. To investigate the mechanisms involved in this process, 2 maize hybrids were grown in field crops at 2 sowing densities and under 3 irrigation regimes (well-watered control, drought before pollination, and drought during pollination), in all possible combinations. Samples of ear tips were taken 2–6 days after synchronous hand pollination and used for the analysis of gene expression and sugars. Glucose and fructose levels increased in kernels with high abortion risk. Several FASCICLIN-LIKE ARABINOGALACTAN PROTEIN (FLA) genes showed negative correlation with abortion. The expression of ZmFLA7 responded to drought only at the tip of the ear. The abundance of arabinogalactan protein (AGP) glycan epitopes decreased with drought and pharmacological treatments that reduce AGP activity enhanced the abortion of fertilized ovaries. Drought also reduced the expression of AthFLA9 in the siliques of Arabidopsis thaliana. Gain- and loss-of-function mutants of Arabidopsis showed a negative correlation between AthFLA9 and seed abortion. On the basis of gene expression patterns, pharmacological, and genetic evidence, we propose that stress-induced reductions in the expression of selected FLA genes enhance abortion of fertilized ovaries in maize and Arabidopsis.

Idioma originalInglés
Páginas (desde-hasta)661-674
Número de páginas14
PublicaciónPlant Cell and Environment
Volumen41
N.º3
DOI
EstadoPublicada - mar 2018
Publicado de forma externa

Áreas temáticas de ASJC Scopus

  • Fisiología
  • Botánica

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    Cagnola, J. I., Dumont de Chassart, G. J., Ibarra, S. E., Chimenti, C., Ricardi, M. M., Delzer, B., Ghiglione, H., Zhu, T., Otegui, M. E., Estevez, J. M., & Casal, J. J. (2018). Reduced expression of selected FASCICLIN-LIKE ARABINOGALACTAN PROTEIN genes associates with the abortion of kernels in field crops of Zea mays (maize) and of Arabidopsis seeds. Plant Cell and Environment, 41(3), 661-674. https://doi.org/10.1111/pce.13136