A5114376316- Plant Molecular Biology Research
- Plant Reproductive Biology
- Bryophyte Studies and Records
- Plant nutrient uptake and metabolism
- Plant tissue culture and regeneration
- Plant Physiology and Cultivation Studies
- Marine and coastal plant biology
- Plant Parasitism and Resistance
- Chromosomal and Genetic Variations
- Photosynthetic Processes and Mechanisms
- Plant Gene Expression Analysis
- Plant and animal studies
- Botany and Plant Ecology Studies
- Legume Nitrogen Fixing Symbiosis
- Transportation Planning and Optimization
- Plant Taxonomy and Phylogenetics
- Mycorrhizal Fungi and Plant Interactions
- Plant Diversity and Evolution
- Biocrusts and Microbial Ecology
- Plant Genetic and Mutation Studies
- Plant Stress Responses and Tolerance
- Urban Transport and Accessibility
- Light effects on plants
- Polysaccharides and Plant Cell Walls
- Tree Root and Stability Studies
Monash University
2016-2025
ARC Centre of Excellence for Plant Success in Nature and Agriculture
2022-2025
Australian Research Council
2023
Australian Regenerative Medicine Institute
2009-2022
University of California, Davis
2009-2021
William & Mary
2010
Center for Systems Biology
2010
Duke University
2010
Weizmann Institute of Science
2008
Massachusetts Institute of Technology
2006
We describe the effects of four recessive homeotic mutations that specifically disrupt development flowers in Arabidopsis thaliana. Each affects outcome organ development, but not location primordia. Homeotic transformations observed are as follows. In agamous-1, stamens to petals; apetala2-1, sepals leaves and petals staminoid apetala3-1, carpels; pistillata-1, sepals. addition, two these (ap2-1 pi-1) result loss organs, ag-1 causes cells would ordinarily form gynoecium differentiate a...
MicroRNAs (miRNAs) are approximately 21 nucleotide noncoding RNAs produced by Dicer-catalyzed excision from stem-loop precursors. Many plant miRNAs play critical roles in development, nutrient homeostasis, abiotic stress responses, and pathogen responses via interactions with specific target mRNAs. not the only Dicer-derived small plants: A substantial amount of total RNA abundance an overwhelming sequence diversity is contributed distinct classes 21- to 24-nucleotide short interfering RNAs....
ABSTRACT We describe allelic series for three loci, mutations in which result homeotic conversions two adjacent whorls the Arabidopsis thaliana flower. Both structure of mature flower and its development from initial primordium are described by scanning electron microscopy. New at APETALA2 locus, ap2-2, ap2-8 ap2-9, cause outer whorls: sepals to carpels (or leaves) petals stamens. Two new PISTILLATA, pi-2 pi-3, second third whorl organs differentiate incorrectly. Homeotic stamens carpels, a...
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...
Vascular plants appeared ~410 million years ago, then diverged into several lineages of which only two survive: the euphyllophytes (ferns and seed plants) lycophytes. We report here genome sequence lycophyte Selaginella moellendorffii (Selaginella), first nonseed vascular plant reported. By comparing gene content in evolutionarily diverse taxa, we found that transition from a gametophyte- to sporophyte-dominated life cycle required far fewer new genes than flowering plant, whereas secondary...
ABSTRACT Mutations in the APETALA1 gene disturb two phases of flower development, meristem specification and floral organ specification. These effects become manifest as a partial conversion flowers into inflorescence shoots disruption sepal petal development. We describe changes an allelic series nine apetala1 mutants show that functions are separable. have also studied interaction between other genes by examining phenotypes multiply mutant plants situ hybridization using probes for several...
ABSTRACT Lateral organs produced by shoot apical and flower meristems exhibit a fundamental abaxial-adaxial asymmetry. We describe three members of the YABBY gene family, FILAMENTOUS FLOWER, YABBY2 YABBY3, isolated on basis homology to CRABS CLAW. Each these genes is expressed in polar manner all lateral organ primordia from meristems. The expression precisely correlated with abaxial cell fate mutants which fates are found ectopically, reduced or eliminated. Ectopic either FLOWER YABBY3...
ABSTRACT Studies of plants with mutations in the CRABS CLAW gene indicate that it is involved suppressing early radial growth gynoecium and promoting its later elongation. It also required for initiation nectary development. To gain further insight, was cloned by chromosome walking. encodes a putative transcription factor containing zinc finger helix-loop-helix domain. The latter resembles first two helices HMG box, known to bind DNA. At least five other genes Arabidopsis carry same...
ABSTRACT Knotted1-like homeobox (knox) genes are expressed in specific patterns within shoot meristems and play an important role meristem maintenance. Misexpression of the knox genes, KNAT1 or KNAT2, Arabidopsis produces a variety phenotypes, including lobed leaves ectopic stipules sinus, region between lobes. We sought to determine mechanisms that control gene expression by examining recessive mutants share phenotypic characteristics with 35S∷KNAT1 plants. Double serrate (se) either...
This is the first atlas to document morphology and development of Arabidopsis thaliana, small flowering plant which emerged during 1980's as primary model for research in surging field biology. choice many studies genetics, biochemistry, development, radiation consists contributions from world's leading laboratories a must have volume biologists. Its extensively illustrated chapters cover five principal areas: embryogenesis, vegetative growth, root reproductive structures, host-pathogen interactions.
We have constructed a restriction fragment length polymorphism linkage map for the nuclear genome of flowering plant Arabidopsis thaliana. The map, containing 90 randomly distributed molecular markers, is physically very dense; greater than 50% within 1.9 centimorgans, or approximately 270 kilobase pairs, mapped DNA fragments. was based on meiotic segregation markers in two different crosses. groups were integrated with five classically by virtue mutations included these Markers consist both...
Asymmetric development of plant lateral organs is initiated by a partitioning organ primordia into distinct domains along their adaxial/abaxial axis. Two primary determinants abaxial cell fate are members the KANADI and YABBY gene families. Progressive loss activity in loss-of-function mutants results progressive transformation types adaxial ones correlated lamina formation. Novel, localized planes blade expansion occur some kanadi genotypes these ectopic outgrowths dependent. We propose...
The florigen paradigm implies a universal flowering-inducing hormone that is common to all flowering plants. Recent work identified FT orthologues as originators of and their polypeptides the likely systemic agent. However, developmental processes targeted by remained unknown. Here we identify local balances between SINGLE FLOWER TRUSS (SFT), tomato precursor florigen, SELF-PRUNING (SP), potent SFT-dependent SFT inhibitor prime targets mobile florigen. graft-transmissible impacts on...
In temperate and boreal ecosystems, seasonal cycles of growth dormancy allow perennial plants to adapt winter conditions. We show, in hybrid aspen trees, that photoperiodic regulation is mechanistically distinct from autumnal cessation. Dormancy sets when symplastic intercellular communication through plasmodesmata blocked by a process dependent on the phytohormone abscisic acid. The blockage prevents growth-promoting signals accessing meristem. Thus, precocious disallowed during dormancy....
Abstract In seed plants, leaves are born on radial shoots, but unlike they determinate dorsiventral organs made of flat lamina. YABBY genes found only in plants and all cases studied expressed primarily lateral a polar manner. Despite their simple expression, Arabidopsis thaliana lacking gene activities have wide range morphological defects as well the shoot apical meristem (SAM). Here, we show that initiated appendages fail to properly activate lamina programs. particular, activation most...