| Categories genes  | Tags ethylene  root  grain  grain length  yield  breeding  transcription factor  development  drought  tolerance  drought tolerance  stress  quality  stress tolerance  reactive oxygen species  grain quality  salt  salt tolerance  salt stress  homeostasis  nucleus  transcriptional activator  redox homeostasis 
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  • Key message
    • OsRAF is an ethylene responsive and root abundant factor gene of rice
    • Here, we report OsRAF (a Root Abundant Factor gene in Oryza sativa), a new member of the rice ERF group, expressed more abundantly in roots than in other organs of rice at the transcriptional level
    • OsLG3 contributing to rice grain length and yield was mined by Ho-LAMap.
    • Phylogenetic analysis showed that OsLG3 might have much potential value for improvement of grain length in japonica breeding
    • The results demonstrated that Ho-LAMap is a potential approach for gene discovery and OsLG3 is a promising gene to be utilized in genomic assisted breeding for rice cultivar improvement
    • Here, we report that the ERF family transcription factor OsLG3 positively regulates drought tolerance in rice
    • In our previous work, we found that OsLG3 has a positive effect on rice grain length without affecting grain quality
    • Collectively, our findings reveal that natural variation in OsLG3 contributes to rice drought tolerance and that the elite allele of OsLG3 is a promising genetic resource for the development of drought-tolerant rice varieties
    • Natural Variation in OsLG3 Increases Drought Tolerance in Rice by Inducing ROS Scavenging.
    • Phylogenetic analysis indicated that the tolerant allele of OsLG3 may improve drought tolerance in cultivated japonica rice
    • Introgression lines and complementation transgenic lines containing the elite allele of OsLG3IRAT109 showed increased drought tolerance, demonstrating that natural variation in OsLG3 contributes to drought tolerance in rice
    • By performing candidate gene association analysis, we found that natural variation in the promoter of OsLG3 is associated with tolerance to osmotic stress in germinating rice seeds
    • Overexpression of OsLG3 significantly improved the tolerance of rice plants to simulated drought, whereas suppression of OsLG3 resulted in greater susceptibility
    • Further investigation suggested that OsLG3 plays a positive role in drought-stress tolerance in rice by inducing reactive oxygen species scavenging
    • Overexpression of the Transcription Factor Gene OsSTAP1 Increases Salt Tolerance in Rice
    • Compared with wild type, transgenic lines overexpressing OsSTAP1 exhibited increased tolerance to salt stress with higher SOD, POD, and CAT activities, and lower Na+/K+ ratios in the shoots
    • Conclusion: This study suggests that OsSTAP1 functions as an AP2/ERF transcriptional activator, and plays a positive role in salt tolerance by decreasing the Na+/K+ ratio and maintaining cellular redox homeostasis
    • OsSTAP1 is localized to the nucleus and acts as a transcriptional activator in plant cells
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