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Author Chen J., Qi T., Hu Z., Fan X., Zhu L., Iqbal M.F., Yin X., Xu G., Fan X.
Title <i>OsNAR2.1</i> Positively Regulates drought tolerance and grain yield Under Drought Stress Conditions in Rice.
Drought is an important environmental factor that severely restricts crop production. The high-affinity nitrate transporter partner protein <i>OsNAR2.1</i> plays an essential role in nitrate absorption and translocation in rice. Our results suggest that <i>OsNAR2.1</i> expression is markedly induced by water deficit. After drought stress conditions and irrigation, compared with wild-type (WT), the survival rate was significantly improved in <i>OsNAR2.1</i> over-expression lines and decreased in <i>OsNAR2.1</i> RNAi lines. The survival rate of Wuyunjing7 (WYJ), <i>OsNRT2.1</i> over-expression lines and <i>OsNRT2.3a</i> over-expression lines was not significantly different. Compared with WT, overexpression of <i>OsNAR2.1</i> could significantly increase nitrogen uptake in rice, and <i>OsNAR2.1</i> RNAi could significantly reduce nitrogen uptake. Under drought conditions, the expression of <i>OsNAC10, OsSNAC1, OsDREB2a</i>, and <i>OsAP37</i> was significantly reduced in <i>OsNAR2.1</i> RNAi lines and increased substantially in <i>OsNAR2.1</i> over-expression lines. Also, the chlorophyll content, relative water content, photosynthetic rate and water use efficiency were decreased considerably in <i>OsNAR2.1</i> RNAi lines and increased significantly in <i>OsNAR2.1</i> over-expression lines under drought conditions. Finally, compared to WT, grain yield increased by about 9.1 and 26.6%, in <i>OsNAR2.1</i> over-expression lines under full and limited irrigation conditions, respectively. These results indicate that <i>OsNAR2.1</i> regulates the response to drought stress in rice and increases drought tolerance.
Journal Front Plant Sci
Country China
Volume 10
Pages 197
Year 2019
PubMed ID 30846998
PubMed Central ID 6393350
DOI 10.3389/fpls.2019.00197
Gene DREB2A ERF3 NAC122 NAR2.1 NRT2.1 NRT2.2 NRT2.3 P5CS RAB16C _ _
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
Stages in Each Organ
- Muant Lines (Gene)
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -