A5067934918- Plant Molecular Biology Research
- Plant Reproductive Biology
- Plant nutrient uptake and metabolism
- Plant Stress Responses and Tolerance
- Light effects on plants
- Chromosomal and Genetic Variations
- Photosynthetic Processes and Mechanisms
- Polysaccharides and Plant Cell Walls
- Genetic Mapping and Diversity in Plants and Animals
- Plant Physiology and Cultivation Studies
- Plant responses to water stress
- Rice Cultivation and Yield Improvement
- Plant tissue culture and regeneration
- Wheat and Barley Genetics and Pathology
- Plant Disease Resistance and Genetics
- Plant Micronutrient Interactions and Effects
- Genomics and Phylogenetic Studies
- Aluminum toxicity and tolerance in plants and animals
- Plant Virus Research Studies
- GABA and Rice Research
- Plant biochemistry and biosynthesis
- Seed Germination and Physiology
- Plant Genetic and Mutation Studies
- Isotope Analysis in Ecology
- Archaeology and ancient environmental studies
University of Oxford
2016-2025
Zhejiang University
2020-2021
State Key Laboratory of Plant Physiology and Biochemistry
2020-2021
Ochanomizu University
2015
Utrecht University
2015
John Innes Centre
2000-2012
Norwich Research Park
1997-2007
Institute of Genetics and Developmental Biology
2007
Chinese Academy of Sciences
2007
Laboratoire de Biologie du Développement
2007
Plants live in fixed locations and survive adversity by integrating growth responses to diverse environmental signals. Here, we show that the nuclear-localized growth-repressing DELLA proteins of Arabidopsis integrate independent hormonal signals adverse conditions. The restraint conferred is beneficial promotes survival. We propose DELLAs permit flexible appropriate modulation plant response changes natural environments.
The Arabidopsis gai mutant allele confers a reduction in gibberellin (GA) responsiveness. Here we report the molecular cloning of GAI and closely related gene GRS. predicted (wild-type) (mutant) proteins differ only by deletion 17-amino-acid segment from within amino-terminal region. GRS contain nuclear localization signals, region homology to putative transcription factor, motifs characteristic transcriptional coactivators. Genetic analysis indicates that is repressor GA responses, can...
Floral initiation and floral organ development are both regulated by the phytohormone gibberellin (GA). For example, in short-day photoperiods, Arabidopsis transition is strongly promoted GA-mediated activation of meristem-identity gene LEAFY. In addition, anther pollen microsporogenesis depend on opposition function specific members DELLA family GA-response repressors. We describe role a microRNA (miR159) regulation photoperiod flowering time development. MiR159 directs cleavage mRNA...
Genetic differences between Arabidopsis thaliana accessions underlie the plant's extensive phenotypic variation, and until now these have been interpreted largely in context of annotated reference accession Col-0. Here we report sequencing, assembly annotation genomes 18 natural A. accessions, their transcriptomes. When assessed on basis annotation, one-third protein-coding genes are predicted to be disrupted at least one accession. However, re-annotation each genome revealed that...
The germination of Arabidopsis seeds is promoted by gibberellin (GA). GAI , and RGA are genes encoding key GA signal-transduction components (GAI RGA) that mediate regulation stem elongation. genome contains two further genes, RGL1 RGL2 encode proteins (RGL1 RGL2) closely related to RGA. Here, we show regulates seed in response GA, RGL1, GAI, do not. In addition, transcript levels rise rapidly following imbibition, then decline as proceeds. situ GUS staining revealed expression imbibed...
Phytochrome is a family of photoreceptors that regulates plant photomorphogenesis; the best-characterized member this phytochrome A. Here, we report identification novel mutations at three Arabidopsis loci (fhy1, fhy2, and fhy3) confer an elongated hypocotyl in far-red but not white light. fhy2 mutants are A deficient, have reduced or undetectable levels PHYA transcripts, contain structural alterations within gene. When grown light, morphologically indistinguishable from wild-type plants....
The phytohormone gibberellin (GA) regulates the development and fertility of Arabidopsis flowers. mature flowers GA-deficient mutant plants typically exhibit reduced elongation growth petals stamens. In addition, GA-deficiency blocks anther development, resulting in male sterility. Previous analyses have shown that GA promotes plant organs by opposing function DELLA proteins, a family nuclear repressors. However, it was not clear proteins are involved GA-regulation stamen development. We...
▪ Abstract Gibberellins are hormones that control growth and a wide variety of other plant developmental processes. In recent years, significant progress has been made on the biochemistry gibberellin biosynthesis mechanisms by which levels regulated in plants. There have also major advances understanding signaling, with several key genes being cloned. This review discusses our current as seen from perspective molecular genetic analysis, relates these observations to previous biochemical...
Phosphate (Pi) is a macronutrient that essential for plant growth and development. However, the low mobility of Pi impedes uptake, thus reducing availability. Accordingly, plants have developed physiological strategies to cope with Here, we report characteristic Arabidopsis thaliana starvation responses are in part dependent on activity nuclear growth-repressing DELLA proteins (DELLAs), core components gibberellin (GA)-signaling pathway. We first show multiple shoot root can be repressed by...
Phytohormones regulate plant development via a poorly understood signal response network. Here, we show that the phytohormone ethylene regulates at least in part alteration of properties DELLA protein nuclear growth repressors, family proteins first identified as gibberellin (GA) signaling components. This conclusion is based on following experimental observations. First, inhibited Arabidopsis root DELLA-dependent manner. Second, delayed GA-induced disappearance repressor ga1-3 from cell...
Because environmentally degrading inorganic fertilizer use underlies current worldwide cereal yields, future agricultural sustainability demands enhanced nitrogen efficiency. We found that genome-wide promotion of histone H3 lysine 27 trimethylation (H3K27me3) enables nitrogen-induced stimulation rice tillering: APETALA2-domain transcription factor NGR5 (NITROGEN-MEDIATED TILLER GROWTH RESPONSE 5) facilitates nitrogen-dependent recruitment polycomb repressive complex 2 to repress...
High soil Na concentrations damage plants by increasing cellular accumulation and K loss. Excess stimulates ethylene-induced soil-salinity tolerance, the mechanism of which we here define via characterization an Arabidopsis thaliana mutant displaying transpiration-dependent tolerance. This phenotype is conferred a loss-of-function allele ethylene overproducer1 (ETO1; alleles cause increased production ethylene). We show that lack ETO1 function confers tolerance through improved shoot Na/K...
Evolution is fueled by phenotypic diversity, which in turn due to underlying heritable genetic (and potentially epigenetic) variation. While environmental factors are well known influence the accumulation of novel variation microorganisms and human cancer cells, extent natural environment influences plants relatively unknown. Here we use whole-genome whole-methylome sequencing test if a specific stress (high-salinity soil) changes frequency molecular profile accumulated mutations...
Abstract The indica and japonica rice ( Oryza sativa ) subspecies differ in nitrate (NO 3 − assimilation capacity nitrogen (N) use efficiency (NUE). Here, we show that a major component of this difference is conferred by allelic variation at OsNR2 , gene encoding NADH/NADPH-dependent NO reductase (NR). Selection-driven divergence has resulted variant alleles structurally distinct proteins, with exhibiting greater NR activity. Indica also promotes uptake via feed-forward interaction OsNRT1.1B...
Abstract Plant survival requires an ability to adapt differing concentrations of nutrient and toxic soil ions, yet ion sensors associated signaling pathways are mostly unknown. Aluminum (Al) ions highly phytotoxic, cause severe crop yield loss forest decline on acidic soils which represent ∼30% land areas worldwide. Here we found Arabidopsis mutant hypersensitive Al. The gene encoding a leucine-rich-repeat receptor-like kinase, was named Al Resistance1 (ALR1). binding ALR1 cytoplasmic domain...
Several aspects of the photophysiology wild-type Arabidopsis thaliana seedlings were compared with those a phytochrome A null mutant, phyA-1, and fhy1, that is putatively involved in transduction light signals from A. Although phyA display near phenotype when grown white (W), they nevertheless several photomorphogenic abnormalities. Thus, whereas germination fhy1 seeds almost fully promoted by pulse red (R) or continuous far-red (FR), seed responsive only to R. Following growth under...