Post-embryonic function of GLOBULAR EMBRYO 4 (GLE4)/OsMPK6 in rice development
Kiyoe Ishimoto1, Misuzu Nosaka-Takahashi2, Mitsuko Kishi-Kaboshi3
1Department of Plant Production Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan.
Plant Biotechnology (Tokyo, Japan)
|January 12, 2024
Summary
Mitogen-activated protein kinase 6 (MPK6) in rice is crucial for post-embryonic development. Loss of GLE4/OsMPK6 function disrupts shoot organization and stomata patterning, leading to dwarfism and abnormal vegetative growth.
Area of Science:
- Plant molecular biology
- Plant developmental biology
- Signal transduction in plants
Background:
- Mitogen-activated protein kinases (MPKs) regulate plant development and responses.
- MPK6 and MPK3 in Arabidopsis are involved in cell division during stomata and zygote development.
- Rice GLE4/OsMPK6 is an MPK6 orthologue essential for early embryogenesis, but its post-embryonic role is unknown due to embryo lethality.
Purpose of the Study:
- To investigate the post-embryonic function of GLE4/OsMPK6 in rice during the vegetative stage.
- To analyze the developmental defects in regenerated homozygous gle4/osmpk6 mutant plants.
Main Methods:
- Regeneration of homozygous gle4/osmpk6 rice plants from tissue culture.
- Phenotypic analysis of regenerated plants, including morphology, shoot development, leaf structure, stomata, and shoot apical meristem.
- Comparison of mutant phenotypes with wild-type rice.
Main Results:
- Regenerated gle4/osmpk6 plants exhibit dwarfism, multiple shoots, and small leaves.
- Mutant shoots fail to reach reproductive stage, showing continuous vegetative proliferation.
- Leaf blade morphology, blade-sheath boundary, stomata arrangement, and shoot apical meristem organization are disrupted in gle4/osmpk6 mutants.
Conclusions:
- GLE4/OsMPK6 plays a critical role in rice shoot organization during post-embryonic vegetative development.
- The gene is essential for proper stomata patterning in rice leaves.
- Understanding GLE4/OsMPK6 function provides insights into plant growth regulation and development.
Related Concept Videos
01:56Gastrulation
57.5K
Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
57.5K
01:10Zygotic Development And Stem Cell Formation
5.2K
The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
5.2K