| Project/Area Number |
20K05871
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 38040:Bioorganic chemistry-related
|
|---|
| Research Institution | Institute of Physical and Chemical Research |
|---|
Principal Investigator |
TRAN LamSon・P 国立研究開発法人理化学研究所, 環境資源科学研究センター, ユニットリーダー (10549009)
|
|---|
| Project Period (FY) |
2020-04-01 – 2021-03-31
|
| Project Status |
Discontinued (Fiscal Year 2020)
|
| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
|
|---|
| Keywords | Crosstalk / karrikin / strigolactone / signal transduction / plant growth / stress adaptation / Strigolactones / Karrikins / Environmental stresses / Plant growth stress / Hormonal crosstalk |
|---|
| Outline of Research at the Start |
- We will elucidate the functions of genes involved in SL and KL pathways in plant adaptation to various types of environmental stresses, including drought, heavy metal and salt stresses.
- We will comparatively analyze the functions of SMAX1/SMXL proteins, the negative regulators of SL and KL pathways, in plant response to drought.
- We will also study the functions of SLs and KARs in plant responses to heavy metal and salt stresses.
- Results will allow us to understand the roles of SLs and KARs in plant responses to environmental stresses, and to develop stress-tolerant crop cultivars.
|
| Outline of Annual Research Achievements |
We studied the functions of the strigolactone-signaling negative regulators SMXL6,7 and 8 in drought tolerance and the associated mechanisms by analyzing the drought-tolerant phenotype of the Arabidopsis thaliana triple smxl6,7,8 mutant plants and studied several drought tolerance-related traits. Our results together indicate that the SMXL6, 7 and 8 act as negative regulators of drought tolerance. The findings of this study suggest that disruption of these SMXL genes in crops may provide a novel way to improve their drought tolerance.
Consistent with the results of the above study, strigolactone and karrikin receptors, DWARF14 (D14) and KARRIKIN INSENSITIVE 2 (KAI2), respectively, have been shown to positively regulate drought tolerance in Arabidopsis. We then aimed to identify genes specifically or commonly regulated by D14 and KAI2 under drought, using comparative analysis of the transcriptome data of the A. thaliana d14-1 and kai2-2 mutants under dehydration conditions. Results suggest that some genes involved in cytokinin and brassinosteroid metabolism might be specifically regulated by the D14 pathway, whereas some genes related to photosynthesis and metabolism of glucosinolates and trehalose are potentially regulated by both D14 and KAI2 pathways in plant response to dehydration.
|
