Plants respond and adapt to abiotic stresses to survive unde...

created [InstanceEdit:9636799] Naithani, Sushma, 2019-02-13
dbId 9636886
displayName Plants respond and adapt to abiotic stresses to survive unde...
literatureReference
modified [InstanceEdit:9637040] Naithani, Sushma, 2019-02-13
schemaClass Summation
text Plants respond and adapt to abiotic stresses to survive under adverse conditions by selectively regulating expression of transcription factors which in turn activate many functional genes related to a particular stress condition. In rice, exposure to drought conditions during the panicle development stage results in a delayed flowering time, reduced number of spikelets, and poor grain filling. OsNAC10 transcription factor encoded by rice gene Os11g0126900 is one such regulator that is induced by drought, salinity, and ABA. It is expressed predominantly in roots and panicles of rice plants (Jeong et al., 2010). Overexpression of OsNAC10 in rice transgenic plants under the control of the constitutive promoter GOS2 (GOS2:OsNAC10) and the root-specific promoter RCc3 (RCc3:OsNAC10) resulted increased tolerance to drought, high salinity, and low temperature at the vegetative stage (Jeong et al., 2010). RCc3:OsNAC10 plants also exhibit drought tolerance at the reproductive stage, with a grain yield increase of 25% to 42% compared to controls. Grain yield of GOS2:OsNAC10 plants under the same conditions were not affected. Further analysis of transcriptome of OsNAC10 overexpressing transgenic plants led to the identification of 34 root-specific and 40 leaf-specific target genes that are up-regulated following OsNAC10 overexpression. OsNAC10 seems to activate different sets of target genes in roots and leaves as only 4 target genes were common in both roots and leaves of the GOS2:OsNAC10 plants. Here, we represent the a root-specific regulatory network of OsNAC10 transcription factor that is induced by drought, salinity, and ABA discovered by Jeong et al. (2010).