A5076608337- Plant Molecular Biology Research
- Plant Parasitism and Resistance
- Plant Reproductive Biology
- Plant and animal studies
- Plant tissue culture and regeneration
- GABA and Rice Research
- Photosynthetic Processes and Mechanisms
- Plant nutrient uptake and metabolism
- Genetic Mapping and Diversity in Plants and Animals
- Legume Nitrogen Fixing Symbiosis
- Plant Gene Expression Analysis
- Rice Cultivation and Yield Improvement
- Transgenic Plants and Applications
- Plant Stress Responses and Tolerance
- Plant Taxonomy and Phylogenetics
- Plant Genetic and Mutation Studies
- Chromosomal and Genetic Variations
- Plant-Microbe Interactions and Immunity
- Bryophyte Studies and Records
- Plant responses to water stress
- Mycorrhizal Fungi and Plant Interactions
- Genomics and Phylogenetic Studies
- Plant Virus Research Studies
- Insect Resistance and Genetics
- CRISPR and Genetic Engineering
Tohoku University
2016-2025
The University of Tokyo
2010-2019
Tokyo University of Science
2019
Japan Science and Technology Agency
2001-2016
Bunkyo University
2011
National Institute for Basic Biology
2009
Okayama University
2003-2009
Nara Institute of Science and Technology
1998-2003
Plant Industry
1994-2000
Commonwealth Scientific and Industrial Research Organisation
1994-2000
The evolution of land flora transformed the terrestrial environment. Land plants evolved from an ancestral charophycean alga which they inherited developmental, biochemical, and cell biological attributes. Additional biochemical physiological adaptations to land, a life cycle with alternation between multicellular haploid diploid generations that facilitated efficient dispersal desiccation tolerant spores, in plant. We analyzed genome liverwort Marchantia polymorpha, member basal plant...
A rice gene encoding a calcium-dependent protein kinase (CDPK), OsCDPK7, was induced by cold and salt stresses. To elucidate the physiological function of we generated transgenic plants with altered levels protein. The extent tolerance to salt/drought stresses these correlated well level OsCDPK7 expression. Therefore, shown be positive regulator commonly involved in both rice. Over-expression enhanced induction some stress-responsive genes response salinity/drought, but not cold. Thus, it...
Recent studies using highly branched mutants of pea, Arabidopsis and rice have demonstrated that strigolactones, a group terpenoid lactones, act as new hormone class, or its biosynthetic precursors, in inhibiting shoot branching. Here, we provide evidence DWARF14 (D14) inhibits tillering may compo-nent the strigolactone-dependent branching inhibition pathway. The d14 mutant exhibits increased branch-ing with reduced plant height like previously characterized strigolactone-deficient...
Plant architecture is mostly determined by shoot branching patterns. Apical dominance a well-known control mechanism in the development of patterns, but little known regarding its role monocots such as rice. Here, we show that concept apical can be applied to tiller bud outgrowth In dwarf10 (d10), an enhanced mutant rice, observed, inhibitory effects meristem was reduced. D10 rice ortholog MAX4/RMS1/DAD1 encodes carotenoid cleavage dioxygenase 8 and supposed involved synthesis unidentified...
In this study, we analyzed five tillering dwarf mutants that exhibit reduction of plant stature and an increase in tiller numbers. We show that, the mutants, axillary meristems are normally established but suppression bud activity is weakened. The phenotypes suggest they play roles control dormancy to suppress activity. However, dependence both node position planting density on their growth, which implies functions genes independent developmental environmental Map-based cloning D3 gene...
Accumulation of cadmium (Cd) in rice ( Oryza sativa L.) grains poses a potential health problem, especially Asia. Most Cd accumulates through phloem transport, but the molecular mechanism this transport has not been revealed. In study, we identified transporter, OsLCT1, involved to grains. OsLCT1-GFP was localized at plasma membrane plant cells, and OsLCT1 showed efflux activity yeast. plants, strong expression observed leaf blades nodes during reproductive stage. uppermost node, transcripts...
The aerial architecture of plants is determined primarily by the pattern shoot branching. Although apical meristem initiation during embryogenesis has been extensively studied molecular genetic approaches using Arabidopsis , little known about mechanisms controlling axillary initiation, mainly because insufficient number mutants that specifically alter it. We identified LAX PANICLE ( ) and SMALL SPA genes as main regulators formation in rice. encodes a basic helix–loop–helix transcription...
Recent studies of highly branched mutants pea, Arabidopsis and rice have demonstrated that strigolactones (SLs) act as hormones inhibit shoot branching. The identification genes work downstream SLs is required for a better understanding how control the growth axillary buds. We found increased tillering phenotype fine culm1 (fc1) not rescued by application 1 μM GR24, synthetic SL analog. Treatment with high concentration GR24 (10 μM) causes suppression tiller in wild-type plants, but...
In plants, the transition to reproductive growth is of particular importance for successful seed production. Transformation shoot apical meristem (SAM) inflorescence (IM) crucial first step in this transition. Using laser microdissection and microarrays, we found that expression PANICLE PHYTOMER2 (PAP2) three APETALA1 (AP1)/FRUITFULL (FUL)-like genes (MADS14, MADS15, MADS18) induced SAM during phase rice (Oryza sativa). PAP2 a MADS box gene belonging grass-specific subclade SEPALLATA...
Strigolactones ( SL s) are plant hormones that inhibit shoot branching. DWARF 14 D 14) inhibits rice tillering and is an receptor candidate in the branching inhibition pathway, whereas close homologue 14‐ LIKE L ) participates signaling pathway of karrikins KAR s), which derived from burnt vegetation as smoke stimulants seed germination. We provide first evidence for direct binding bioactive analogue GR 24 to 14. Isothermal titration calorimetry measurements show a 14– affinity...
The perception mechanism for the strigolactone (SL) class of plant hormones has been a subject debate because their receptor, DWARF14 (D14), is an α/β-hydrolase that can cleave SLs. Here we show via time-course analyses SL binding and hydrolysis by Arabidopsis thaliana D14, level uncleaved strongly correlates with induction active signaling state. In addition, AtD14
Abstract Aerial architecture in higher plants is dependent on the activity of shoot apical meristem (SAM) and axillary meristems (AMs). The SAM produces a main leaf primordia, while AMs are generated at axils primordia give rise to branches flowers. Therefore, formation critical step construction plant architecture. Here, we characterized rice (Oryza sativa) lax panicle2 (lax2) mutant, which has altered AM formation. LAX2 regulates branching aboveground parts throughout development, except...
Fungal symbiosis with early land plants Hundreds of millions years ago, evolved descendants aquatic began showing up on dry land. These newly terrestrialized species had to deal increased ultraviolet light exposure, desiccation, and less accessible nutrients. Rich et al. show how mutualist fungi may have helped these nascent plant lineages adaptation their challenging environment (see the Perspective by Bouwmeester). Genetic metabolic analysis a liverwort as representative such suggests that...
Abstract In flowering plants, strigolactones (SLs) have dual functions as hormones that regulate growth and development, rhizosphere signaling molecules induce symbiosis with arbuscular mycorrhizal (AM) fungi. Here, we report the identification of bryosymbiol (BSB), an SL from bryophyte Marchantia paleacea . BSB is also found in vascular indicating its origin common ancestor land plants. synthesis enhanced at AM permissive conditions deficient mutants are impaired symbiosis. contrast,...
Inflorescences of grass species have a distinct morphology in which florets are grouped compact branches called spikelets. Although many studies shown that the molecular and genetic mechanisms control floret organ formation conserved between monocots dicots, little is known about pathway leading to spikelet formation. In frizzy panicle (fzp) mutant rice, replaced by sequential rounds branching. Detailed analyses revealed several rudimentary glumes formed each ectopic branch, indicating...
Summary TERMINAL FLOWER 1 (TFL1)/CENTRORADIALIS (CEN) ‐like genes play important roles in determining plant architecture, mainly by controlling the timing of phase transition. To investigate possibility similar mechanisms operating control inflorescence architecture rice, we analysed functions RCN1 and RCN2 , rice TFL1/CEN homologs. Constitutive overexpression or Arabidopsis caused a late‐flowering highly branching phenotype, indicating that they possess conserved biochemical as TFL1 . In...
Inflorescence architecture is one of the most important agronomical traits. Characterization rice aberrant panicle organization 1 (apo1) mutants revealed that APO1 positively controls spikelet number by suppressing precocious conversion inflorescence meristems to meristems. In addition, associated with regulation plastchron, floral organ identity, and determinacy. Phenotypic analyses apo1 homeotic double demonstrate regulates class-C genes, but not class-B genes. Molecular studies encodes an...
Abstract Axillary meristem (AM) formation is an important determinant of plant architecture. In rice (Oryza sativa), LAX PANICLE1 (LAX1) function required for the generation AM throughout plant's lifespan. Here, we show a close relationship between initiation and leaf development; specifically, plastochron 4 (P4) stage development crucial proliferation meristematic cells. Coincident with this, LAX1 expression starts in axils leaves at P4 stage. mRNA accumulates two to three layers cells...