2019 Fiscal Year Annual Research Report
Crosstalk between strigolactone and cytokini signaling pathways in plant growth and stress adaptation
| Project/Area Number |
17K07459
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| Research Institution | Institute of Physical and Chemical Research |
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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)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | crosstalk / hormone homeostasis / plant growth / stress adaptation / transcriptome |
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| Outline of Annual Research Achievements |
The signaling pathways mediated by two paralogous proteins, the strigolactone (SL) receptor DWARF14 and the karrikin receptor KARRIKIN INSENSITIVE 2, show both overlapping and specific responses in affecting various physiological and biochemical processes to positively modulate the adaptation of Arabidopsis thaliana plants to drought. D14 had a lesser role in the maintenance of cell membrane integrity, leaf cuticle structure and abscisic acid‐induced leaf senescence, but a greater role in drought‐induced anthocyanin biosynthesis, than KAI2. Interestingly, a possible additive relationship between D14 and KAI2 was observed in regulating cell membrane integrity and leaf cuticle development. Results of the transcriptome analysis support these findings. In addition, results of this study also suggest the existence of a complex interaction between the D14 and ABA signaling pathways in the adaptation of Arabidopsis to drought.
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