A5024254522- Rice Cultivation and Yield Improvement
- Plant nutrient uptake and metabolism
- Plant responses to water stress
- Plant Molecular Biology Research
- Plant Reproductive Biology
- Genetic Mapping and Diversity in Plants and Animals
- Plant Stress Responses and Tolerance
- GABA and Rice Research
- Plant Parasitism and Resistance
- Plant tissue culture and regeneration
- Polysaccharides and Plant Cell Walls
- Plant-Microbe Interactions and Immunity
- Plant Disease Resistance and Genetics
- Crop Yield and Soil Fertility
- Plant Water Relations and Carbon Dynamics
- Plant Micronutrient Interactions and Effects
- Plant Pathogenic Bacteria Studies
- Insect-Plant Interactions and Control
- Agricultural Productivity and Crop Improvement
- Coastal wetland ecosystem dynamics
- Agronomic Practices and Intercropping Systems
- Plant Growth Enhancement Techniques
- Photosynthetic Processes and Mechanisms
- Freezing and Crystallization Processes
- Greenhouse Technology and Climate Control
Nagoya University
2016-2025
The University of Western Australia
2021
Japan Science and Technology Agency
2018-2020
The University of Tokyo
2006
Joetsu University of Education
2006
National Institute of Genetics
2006
Nagoya Institute of Technology
1995
Abstract Although the importance of auxin in root development is well known, molecular mechanisms involved are still unknown. We characterized a rice (Oryza sativa) mutant defective crown formation, rootless1 (crl1). The crl1 showed additional auxin-related abnormal phenotypic traits roots, such as decreased lateral number, insensitivity and impaired gravitropism, whereas no were observed aboveground organs. Expression Crl1, which encodes member plant-specific ASYMMETRIC LEAVES2/LATERAL...
Abstract The rice (Oryza sativa) dwarf mutant d61 phenotype is caused by loss of function a BRASSINOSTEROID INSENSITIVE1 ortholog, OsBRI1. We have identified nine alleles, the weakest which, d61-7, confers agronomically important traits such as semidwarf stature and erect leaves. Because erect-leaf habit considered to increase light capture for photosynthesis, we compared biomass grain production wild-type d61-7 rice. wild type was 38% higher than that at harvest under conventional planting...
Significance Grain weight is an important crop yield component; however, its underlying regulatory mechanisms are largely unknown. Here, we identify a grain-weight quantitative trait locus (QTL) in rice encoding new-type GNAT-like protein that harbors intrinsic histone acetyltransferase activity (OsglHAT1). Elevated OsglHAT1 expression enhances grain and by enlarging spikelet hulls via increasing cell number accelerating filling, increases global acetylation levels of H4. Our findings reveal...
Lateral roots (LRs) are derived from a parental root and contribute to water nutrient uptake the soil. Auxin/indole-3-acetic acid protein (AUX/IAA; IAA) auxin response factor (ARF)-mediated signaling essential for LR formation. Lysigenous aerenchyma, gas space created by cortical cell death, aids internal oxygen transport within plants. Rice (Oryza sativa) forms lysigenous aerenchyma constitutively under aerobic conditions increases its formation oxygen-deficient conditions; however,...
Summary Molecular genetic and physiological studies on brassinosteroid (BR)‐related mutants of dicot plants have revealed that BRs play important roles in normal plant growth development. However, little is known about the function BR monocots (grasses), except for phenotypic analysis a rice mutant partially insensitive to signaling. To investigate monocots, we identified characterized BR‐deficient rice, dwarf1 ( brd1 ). The showed range abnormalities organ development growth, most striking...
GAMYB was first isolated as a positive transcriptional regulator of gibberellin (GA)-dependent alpha-amylase expression in barley aleurone cells, and its molecular biochemical properties have been well characterized. However, the role elsewhere plant is not understood. To investigate function outside we loss-of-function mutants from panel rice produced by insertion retrotransposon, Tos17. Through PCR screening using primers for (OsGAMYB) Tos17, three independent mutant alleles that contained...
Abstract Some phytohormones such as gibberellins (GAs) and cytokinins (CKs) are potential targets of the KNOTTED1-like homeobox (KNOX) protein. To enhance our understanding KNOX protein function in plant development, we identified rice (Oryza sativa) genes for adenosine phosphate isopentenyltransferase (IPT), which catalyzes rate-limiting step CK biosynthesis. Molecular biochemical studies revealed that there eight IPT genes, OsIPT1 to OsIPT8, genome, including a pseudogene, OsIPT6....
Root system formation proceeds in close coordination with shoot growth. Accordingly, root growth and its functions are regulated tightly by the through materials cycling between roots shoots. A plant consists of different kinds that differ morphology functions. The spatial configuration distribution these determine architecture soil, which turn primarily regulates acquisition soil resources like nutrients water. Morphological physiological properties each concomitant tissues further affect...
Summary To identify where gibberellin (GA) biosynthesis and signaling occur, we analyzed the expression of four genes involved in GA biosynthesis, 20‐oxidase1 20‐oxidase2 ( OsGA20ox1 OsGA20ox2 ), 3‐oxidase1 3‐oxidase2 OsGA3ox1 OsGA3ox2 two signaling, namely, gene encoding α‐subunit heterotrimeric GTP‐binding protein Gα SLENDER RICE1 SLR1 which encodes a repressor signaling. At vegetative stage, , was observed rapidly elongating or dividing organs tissues, whereas could not be detected....
Summary Cytokinin is known to have negative effects on de novo auxin‐induced root formation. However, the regulatory mechanisms of initiation by both cytokinin and auxin are poorly understood. In this study, we characterized a rice mutant, termed crown rootless5 ( crl5 ), which produced fewer roots displayed impaired primordia. The expression CRL5 , encodes member large AP2/ERF transcription factor family protein, was observed in stem region where occurs. Exogenous treatment induced without...
Abstract Since first identifying two alleles of a rice (Oryza sativa) brassinosteroid (BR)-insensitive mutant, d61, that were also defective in an orthologous gene Arabidopsis (Arabidopsis thaliana) BRASSINOSTEROID INSENSITIVE1 (BRI1), we have isolated eight additional alleles, including null mutations, the BRI1 OsBRI1. The most severe d61-4, exhibited dwarfism and twisted leaves, although pattern formation differentiation normal. This shoot phenotype was caused mainly by defect cell...
The lignocellulosic biorefinery industry can be an important contributor to achieving global carbon net zero goals. However, low valorization of the waste lignin severely limits sustainability biorefineries. Using a hydrothermal reaction, we have converted sulfuric acid (SAL) into water-soluble SAL (HSAL). Here, show improvement HSAL on plant nutrient bioavailability and growth through its metal chelating capacity. We characterize HSAL's high ratio phenolic hydroxyl groups methoxy capacity...
Summary The root system is a crucial determinant of plant growth potential because its important functions, e.g. uptake water and nutrients, structural support interaction with symbiotic organisms. Elucidating the molecular mechanism development functions therefore necessary for improving productivity, particularly crop plants, including rice ( Oryza sativa ). As an initial step towards developing comprehensive understanding system, we performed large‐scale transcriptome analysis via...
Adventitious (crown) roots account for the majority of root system monocots. It is reported that auxin plays an important role in formation crown roots, but underlying molecular mechanisms are still unknown. We characterized a rice (Oryza sativa L.) mutant rootless4 (crl4) was found to have defective formation. Besides reduced number, crl4 showed auxin-related abnormal phenotypical character-istics such as lateral number and impaired gravitropism. CRL4 encodes protein highly homologous with...
The phytohormones auxins and brassinosteroids are both essential regulators of physiological developmental processes, it has been suggested that they act inter-dependently synergistically. In rice (Oryza sativa), auxin co-application improves the brassinosteroid response in lamina inclination bioassay. Here, we showed stimulate perception by regulating level receptor. Auxin treatment increased expression receptor gene OsBRI1. promoter OsBRI1 contains an auxin-response element (AuxRE) is...
Abstract Rice production faces the challenge to be enhanced by 50% year 2030 meet growth of population in rice-eating countries. Whereas yield cereal crops tend reach plateaus and a is likely deeply affected climate instability resource scarcity coming decades, building rice cultivars harboring root systems that can maintain performance capturing water nutrient resources unevenly distributed major breeding target. Taking advantage gathering community biologists Global Science Partnership...
Internal oxygen diffusion from shoot to root tips is enhanced by the formation of aerenchyma (gas space) in waterlogged soils. Lysigenous created programmed cell death and subsequent lysis cortical cells. Rice (Oryza sativa) forms constitutively under aerobic conditions increases its oxygen-deficient conditions. Recently, we have demonstrated that constitutive regulated auxin signaling mediated Auxin/indole-3-acetic acid protein (AUX/IAA; IAA). While ethylene involved inducible formation,...
Auxin flow is important for different root developmental processes such as formation, emergence, elongation and gravitropism. However, the detailed information about mechanisms regulating auxin less well understood in rice. We characterized transport-related mutants, Ospin-formed2-1 (Ospin2-1) Ospin2-2, which exhibited curly phenotypes altered lateral formation patterns The OsPIN2 gene encodes a member of efflux carrier proteins that possibly regulates basipetal from tip toward zone....