Abstract：
:Winter wheat lines can achieve cold acclimation (development of tolerance to freezing temperatures) and vernalization (delay in transition from vegetative to reproductive phase) in response to low non-freezing temperatures. To describe cold-acclimation-specific processes and pathways, we utilized cold acclimation transcriptomic data from two lines varying in freeze survival but not vernalization. These lines, designated freeze-resistant (FR) and freeze-susceptible (FS), were the source of crown tissue RNA. Well-annotated differentially expressed genes (p ≤ 0.005 and fold change ≥ 2 in response to 4 weeks cold acclimation) were used for gene ontology and pathway analysis. "Abiotic stimuli" was identified as the most enriched and unique for FR. Unique to FS was "cytoplasmic components." Pathway analysis revealed the "triacylglycerol degradation" pathway as significantly downregulated and common to both FR and FS. The most enriched of FR pathways was "neighbors of DREB2A," with the highest positive median fold change. The "13-LOX and 13-HPL" and the "E2F" pathways were enriched in FR only with a negative median fold change. The "jasmonic acid biosynthesis" pathway and four "photosynthetic-associated" pathways were enriched in both FR and FS but with a more negative median fold change in FR than in FS. A pathway unique to FS was "binding partners of LHCA1," which was enriched only in FS with a significant negative median fold change. We propose that the DREB2A, E2F, jasmonic acid biosynthesis, and photosynthetic pathways are critical for discrimination between cold-acclimated lines varying in freeze survival.
journal_name
Funct Integr Genomicsjournal_title
Functional & integrative genomicsauthors
Karki A,Horvath DP,Sutton Fdoi
10.1007/s10142-012-0303-2subject
Has Abstractpub_date
2013-03-01 00:00:00pages
57-65issue
1eissn
1438-793Xissn
1438-7948journal_volume
13pub_type
杂志文章abstract：:The ever-rising population of the twenty-first century together with the prevailing challenges, such as deteriorating quality of arable land and water, has placed a big challenge for plant breeders to satisfy human needs for food under erratic weather patterns. Rice, wheat, and maize are the major staple crops consume...
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