Drought Stress and Tolerance in Soybean


Drought-responsive transcription factors



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InTech-Drought stress and tolerance in soybean

6.3. Drought-responsive transcription factors

Transcription  regulation  plays  an  important  role  in  drought  stress  response.  For  instance,

using oligo microarray analysis, transcriptions of 4,433 and 5,098 soybean genes were found

to be significantly up-regulated and down-regulated respectively when subjected to a no-ir‐

rigation period for 4 days [95]. The signal transduction pathways can ultimately regulate the

expression of drought-responsive genes through diverse transcription factors. Transcription

factors  often  target  the  corresponding  cis-acting  promoter  elements,  such  as  the  drought

stress related elements DRE, ABRE, Gbox, and T/Gbox [95, 96].

A Comprehensive Survey of International Soybean Research - Genetics, Physiology, Agronomy and Nitrogen

Relationships

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In the soybean genome, ~500 transcription factors were in silico annotated [96]. Increas‐

ing efforts have been placed to characterize their importance and functions in relation to

drought   [97-101].   Soybean   transcription   factors   that   confer   drought   tolerance   are   sum‐

marized in Table 4.




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