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PLoS One. 2015 Aug 5;10(8):e0133322. doi: 10.1371/journal.pone.0133322. eCollection 2015.

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

Author information

1
Biomass Research Platform Team, RIKEN Center for Sustainable Resource Science, Koyadai, Tsukuba, Ibaraki, Japan; Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, Koyadai, Tsukuba, Ibaraki, Japan; The Plant Accelerator, Australian Plant Phenomics Facility, School of Agriculture, Food & Wine, University of Adelaide, Glen Osmond, Australia.
2
Australian Centre for Plant Functional Genomics, School of Agriculture, Food & Wine, University of Adelaide, Glen Osmond, Australia.
3
The Plant Accelerator, Australian Plant Phenomics Facility, School of Agriculture, Food & Wine, University of Adelaide, Glen Osmond, Australia.
4
Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan.
5
Biomass Research Platform Team, RIKEN Center for Sustainable Resource Science, Koyadai, Tsukuba, Ibaraki, Japan; Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, Koyadai, Tsukuba, Ibaraki, Japan.
6
Australian Centre for Plant Functional Genomics, School of Agriculture, Food & Wine, University of Adelaide, Glen Osmond, Australia; The Plant Accelerator, Australian Plant Phenomics Facility, School of Agriculture, Food & Wine, University of Adelaide, Glen Osmond, Australia.

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.

PMID:
26244554
PMCID:
PMC4526543
DOI:
10.1371/journal.pone.0133322
[Indexed for MEDLINE]
Free PMC Article

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