한빛사논문
- 조회514
Jinsu Lee1,2, Huize Chen1,3, Gisuk Lee4, Aurélia Emonet5, Sang-Gyu Kim4, Donghwan Shim6, and Yuree Lee2,7,8,*
1Research Institute of Basic Sciences, Seoul National University, Seoul 08826, Republic of Korea; 2Research Center for Plant Plasticity, Seoul National University, Seoul 08826, Republic of Korea; 3Higher Education Key Laboratory of Plant Molecular and Environmental Stress Response in Shanxi Province, Shanxi Normal University, Taiyuan, 030000, Shanxi, P. R. China; 4Department of Biological Sciences, Korea Advanced Institute for Science and Technology, Daejeon 34141, Republic of Korea; 5Department of Plant Molecular Biology, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland; 6Department of Biological Sciences, Chungnam National University, Daejeon, 34134, Republic of Korea; 7School of Biological Sciences, Seoul National University, Seoul 08826, Republic of Korea; 8Plant Genomics and Breeding Institute, Seoul National University, Seoul 08826, Republic of Korea
*Corresponding author.
Abstract
- The timely removal of end-of-purpose flowering organs is as essential for reproduction and plant survival as timely flowering. Despite much progress in understanding the molecular mechanisms of floral organ abscission, little is known about how various environmental factors are integrated into developmental programs that determine the timing of abscission.
- Here, we investigated whether reactive oxygen species (ROS), mediators of various stress-related signalling pathways, are involved in determining the timing of abscission and, if so, how they are integrated with the developmental pathway in Arabidopsis thaliana.
- MSD2, encoding a secretory manganese superoxide dismutase, was preferentially expressed in the abscission zone of flowers, and floral organ abscission was accelerated by the accumulation of ROS in msd2 mutants. The expression of the genes encoding the receptor-like kinase HAESA (HAE) and its cognate peptide ligand INFLORESCENCE DEFICIENT IN ABSCISSION (IDA), the key signalling components of abscission, was accelerated in msd2 mutants, suggesting that MSD2 acts upstream of IDA-HAE. Further transcriptome and pharmacological analyses revealed that abscisic acid and nitric oxide facilitate abscission by regulating the expression of IDA and HAE during MSD2-mediated signalling.
- These results suggest that MSD2-dependent ROS metabolism is an important regulatory point integrating environmental stimuli into the developmental program leading to abscission.
논문정보
- Research article
- 2022년 06월 (BRIC 등록일 2022-06-29)
- 국내(교신)+국외 연구진
- 생명과학 > 식물학
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