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Comparison of Leaf Sheath Transcriptome Profiles with Physiological Traits of Bread Wheat Cultivars under Salinity Stress

Bibliography:

Takahashi F, Tilbrook J, Trittermann C, Berger B, Roy SJ, Seki M, Shinozaki K, Tester M. (2015) Comparison of Leaf Sheath Transcriptome Profiles with Physiological Traits of Bread Wheat Cultivars under Salinity Stress. PLoS ONE 10(8): e0133322. doi:10.1371/journal.pone.0133322

Authors:

Fuminori Takahashi, Joanne Tilbrook, Christine Trittermann, Bettina Berger, Stuart J. Roy, Motoaki Seki, Kazuo Shinozaki, Mark Tester

Keywords:

Salinity, Gene expression, Plant resistance to abiotic stress, Wheat, Bread, Genomic databases, Rice, Microarrays

Year:

2015

Abstract:

Salinity stress has significant negative effects on plant biomass production and crop yield.
Salinity tolerance is controlled by complex systems of gene expression and ion transport.
The relationship between specific features of mild salinity stress adaptation and gene
expression was analyzed using four commercial varieties of bread wheat (Triticum aestivum)
that have different levels of salinity tolerance. The high-throughput phenotyping system
in The Plant Accelerator at the Australian Plant Phenomics Facility revealed variation in
shoot relative growth rate and salinity tolerance among the four cultivars. Comparative analysis
of gene expression in the leaf sheaths identified genes whose functions are potentially
linked to shoot biomass development and salinity tolerance. Early responses to mild salinity
stress through changes in gene expression have an influence on the acquisition of stress
tolerance and improvement in biomass accumulation during the early “osmotic” phase of
salinity stress. In addition, results revealed transcript profiles for the wheat cultivars that
were different from those of usual stress-inducible genes, but were related to those of plant
growth. These findings suggest that, in the process of breeding, selection of specific traits
with various salinity stress-inducible genes in commercial bread wheat has led to adaptation
to mild salinity conditions.

ISSN:

1932-6203