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Environmental aridity is associated with cytotype segregation and polyploidy occurrence in Brachypodium distachyon (Poaceae).

Publication ,  Journal Article
Manzaneda, AJ; Rey, PJ; Bastida, JM; Weiss-Lehman, C; Raskin, E; Mitchell-Olds, T
Published in: The New phytologist
February 2012

• The ecological and adaptive significance of plant polyploidization is not well understood and no clear pattern of association between polyploid frequency and environment has emerged. Climatic factors are expected to predict cytotype distribution. However, the relationship among climate, cytotype distribution and variation of abiotic stress tolerance traits has rarely been examined. • Here, we use flow cytometry and root-tip squashes to examine the cytotype distribution in the temperate annual grass Brachypodium distachyon in 57 natural populations distributed across an aridity gradient in the Iberian Peninsula. We further investigate the link between environmental aridity, ploidy, and variation of drought tolerance and drought avoidance (flowering time) traits. • Distribution of diploids (2n = 10) and allotetraploids (2n = 30) in this species is geographically structured throughout its range in the Iberian Peninsula, and is associated with aridity gradients. Importantly, after controlling for geographic and altitudinal effects, the link between aridity and polyploidization occurrence persisted. Water-use efficiency varied between ploidy levels, with tetraploids being more efficient in the use of water than diploids under water-restricted growing conditions. • Our results indicate that aridity is an important predictor of polyploid occurrence in B. distachyon, suggesting a possible adaptive origin of the cytotype segregation.

Duke Scholars

Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

1469-8137

Publication Date

February 2012

Volume

193

Issue

3

Start / End Page

797 / 805

Related Subject Headings

  • Water
  • Time Factors
  • Spain
  • Rain
  • Polyploidy
  • Plant Biology & Botany
  • Logistic Models
  • Geography
  • Flowers
  • Environment
 

Citation

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MLA
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Manzaneda, A. J., Rey, P. J., Bastida, J. M., Weiss-Lehman, C., Raskin, E., & Mitchell-Olds, T. (2012). Environmental aridity is associated with cytotype segregation and polyploidy occurrence in Brachypodium distachyon (Poaceae). The New Phytologist, 193(3), 797–805. https://doi.org/10.1111/j.1469-8137.2011.03988.x
Manzaneda, Antonio J., Pedro J. Rey, Jesús M. Bastida, Christopher Weiss-Lehman, Evan Raskin, and Thomas Mitchell-Olds. “Environmental aridity is associated with cytotype segregation and polyploidy occurrence in Brachypodium distachyon (Poaceae).The New Phytologist 193, no. 3 (February 2012): 797–805. https://doi.org/10.1111/j.1469-8137.2011.03988.x.
Manzaneda AJ, Rey PJ, Bastida JM, Weiss-Lehman C, Raskin E, Mitchell-Olds T. Environmental aridity is associated with cytotype segregation and polyploidy occurrence in Brachypodium distachyon (Poaceae). The New phytologist. 2012 Feb;193(3):797–805.
Manzaneda, Antonio J., et al. “Environmental aridity is associated with cytotype segregation and polyploidy occurrence in Brachypodium distachyon (Poaceae).The New Phytologist, vol. 193, no. 3, Feb. 2012, pp. 797–805. Epmc, doi:10.1111/j.1469-8137.2011.03988.x.
Manzaneda AJ, Rey PJ, Bastida JM, Weiss-Lehman C, Raskin E, Mitchell-Olds T. Environmental aridity is associated with cytotype segregation and polyploidy occurrence in Brachypodium distachyon (Poaceae). The New phytologist. 2012 Feb;193(3):797–805.
Journal cover image

Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

1469-8137

Publication Date

February 2012

Volume

193

Issue

3

Start / End Page

797 / 805

Related Subject Headings

  • Water
  • Time Factors
  • Spain
  • Rain
  • Polyploidy
  • Plant Biology & Botany
  • Logistic Models
  • Geography
  • Flowers
  • Environment