Table 2.

Improvement in wheat drought signaling and tolerance by transgenic approaches.

Transformed gene	Improvement in signaling and tolerance	Reference
HVA1	Abscisic acid (ABA) signaling, produce Late embryogenesis abundant 3 (LEA3) for cell membrane integrity, higher biomass production and water use efficiency (WUE), drought, and salt tolerance	Sivamani et al., 2000
HVA1	ABA responsiveness, ABA signaling, higher WUE and relative water content (RWC), stable yield, drought tolerance	Bahieldin et al., 2005
GmDREB	ABA independent signaling (AIS), drought, and salt tolerance	Shiqing et al., 2005
GmDREB	AIS, 2-fold higher proline production, stay green, SURV, drought tolerance	Wang et al., 2006
GhDREB	AIS, higher soluble sugars and chlorophyll production, improved drought, salt, and freezing tolerance	Gao et al., 2009
DREB1A	Higher SURV, WUE, and yield under drought	Pierre et al., 2012
SNAC1	Activation of sucrose phosphate synthase, type 2C protein phosphatases and 1-phosphatidylinositol-3-phosphate-5-kinase genes for ABA signaling, high RWC, chlorophyll content and biomass, enhanced salinity and drought tolerance	Saad et al., 2013
Alfalfa aldose reductase	Antioxidant defense, ABA signaling, detoxification of aldehyde substrate, green biomass production, drought tolerance	Fehér-Juhász et al., 2014