Jim Hanan

ORCID: 0000-0002-0358-8693
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About
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Research Areas
  • Greenhouse Technology and Climate Control
  • Leaf Properties and Growth Measurement
  • Plant Surface Properties and Treatments
  • Plant Water Relations and Carbon Dynamics
  • Horticultural and Viticultural Research
  • Plant Physiology and Cultivation Studies
  • Plant Molecular Biology Research
  • Plant and animal studies
  • Plant nutrient uptake and metabolism
  • Tree Root and Stability Studies
  • Legume Nitrogen Fixing Symbiosis
  • Light effects on plants
  • Simulation Techniques and Applications
  • Evolutionary Algorithms and Applications
  • Insect and Arachnid Ecology and Behavior
  • Computer Graphics and Visualization Techniques
  • Gene Regulatory Network Analysis
  • Plant Reproductive Biology
  • Slime Mold and Myxomycetes Research
  • Cellular Automata and Applications
  • Soybean genetics and cultivation
  • Crop Yield and Soil Fertility
  • Insect behavior and control techniques
  • Insect-Plant Interactions and Control
  • Plant Parasitism and Resistance

The University of Queensland
2011-2020

ARC Centre of Excellence for Plant Success in Nature and Agriculture
2003-2020

Agriculture and Food
2012-2020

Queensland University of Technology
2008-2012

Australian Research Council
2006-2009

University of Calgary
2008

ARC Centre of Excellence in Advanced Molecular Imaging
2008

Agricultural Research Service - Midwest Area
2006

United States Department of Agriculture
2006

University of Minnesota
2006

In this paper we present a method for modeling herbaceous plants, suitable generating realistic plant images and animating developmental processes. The idea is to achieve realism by simulating mechanisms which control growth in nature. approach the of architecture extended leaves flowers. expressed using formalism L-systems.

10.1145/378456.378503 article EN ACM SIGGRAPH Computer Graphics 1988-06-01

• Background and Aims The morphogenesis architecture of a rice plant, Oryza sativa, are critical factors in the yield equation, but they not well studied because lack appropriate tools for 3D measurement. plants is characterized by large number tillers leaves. aims this study were to specify plant find functions represent growth across all stages.

10.1093/aob/mci136 article EN Annals of Botany 2005-04-08

Canopy‐level interactions have been largely ignored in epidemiological models and their applications defining disease risks under climate change, although these are important for management. This paper uses anthracnose of Stylosanthes scabra as a case study reviews research on dynamics the pathogen ( Colletotrichum gloeosporioides ) at canopy level evolution changing climate. It argues that linking dynamics, crop growth is essential predicting change. A plant functional‐structural model was...

10.1111/j.1365-3059.2010.02408.x article EN Plant Pathology 2011-01-10

Functional–structural modelling can be used to increase our understanding of how different aspects plant structure and function interact, identify knowledge gaps guide priorities for future experimentation. By integrating existing the kiwifruit (Actinidia deliciosa) vine's architecture physiology, aim is develop conceptual mathematical hypotheses on several features: (a) plasticity architecture; (b) effects organ position within canopy its size; (c) environment horticultural management shoot...

10.1093/aob/mcq180 article EN Annals of Botany 2010-09-20

Plants are sessile, so have evolved sensitive ways to detect attacking herbivores and sophisticated strategies effectively defend themselves. Insect herbivory induces synthesis of the phytohormone jasmonic acid which activates downstream metabolic pathways for various chemical defences such as toxins digestion inhibitors. Insects also animals, many coevolved physiological adaptations that negate this induced plant defence. behaviour has rarely been studied in context defence, although...

10.1098/rspb.2012.2646 article EN Proceedings of the Royal Society B Biological Sciences 2013-02-06

10.1016/s0308-521x(01)00114-7 article EN Agricultural Systems 2002-12-28

10.1016/s1364-8152(96)00040-0 article EN Environmental Modelling & Software 1997-01-01

The distribution of light in the canopy is a major factor regulating growth and development plant. main variables interest are amount photosynthetically active radiation (PAR) reaching different elements plant canopy, quality (spectral composition) these elements. A environment model based on Monte Carlo (MC) path tracing photons, capable computing both PAR spectral composition light, was developed by Měch (1997), can be conveniently interfaced with virtual plants expressed using open...

10.1071/fp08082 article EN Functional Plant Biology 2008-01-01

Abstract Bud outgrowth is regulated by the interplay of multiple hormones, including auxin, cytokinin, strigolactones, and an unidentified long-distance feedback signal that moves from shoot to root. The model bud regulation in pea (Pisum sativum) includes these signals a network five RAMOSUS (RMS) genes operate shoot-root-shoot loop regulate synthesis of, response to, strigolactones. number components this renders integration new existing hypotheses both complex cumbersome. A...

10.1105/tpc.109.069013 article EN The Plant Cell 2009-11-01

For pesticides to effectively manage pests, they must first be deposited on the target (typically a plant surface) in manner which active ingredient(s) can readily taken up by organism. A architectural model that enables location of various components 3-D space combined with particle trajectory has been used study interception spray droplets vegetative elements. Results from simulation are compared wind tunnel studies glyphosate deposition cotton (Gossypium hirsutum L. var. Sicala), sow...

10.1071/fp08056 article EN Functional Plant Biology 2008-01-01

• This paper presents two models of carrier-dependent long-distance auxin transport in stems that represent the process at different scales. A simple compartment model using a single constant transfer rate produced similar data to those observed biological experiments. The effects underlying assumptions were tested more detailed representing cellular and intracellular processes enabled discussion patterns signalling. output best fits is by where polar not limited number transporters/carriers...

10.1111/j.1469-8137.2012.04093.x article EN New Phytologist 2012-03-22

It is essential to provide experimental evidence and reliable predictions of the effects water stress on crop production in drier, less predictable environments. A field experiment undertaken southeast Queensland, Australia with three regimes (fully irrigated, rainfed irrigated until late canopy expansion followed by rainfed) was used compare two maize (Zea mays L.) cultivars (Pioneer 34N43 Pioneer 31H50). Water affected growth yield more than 31H50. model APSIM-Maize, after having been...

10.1626/pps.13.199 article EN cc-by-nc Plant Production Science 2010-01-01

Functional–structural plant models (FSPMs) are used to integrate knowledge and test hypotheses of behaviour, aid in the development decision support systems. A significant amount effort is being put into providing a sound methodology for building them. Standard techniques, such as procedural or object-oriented programming, not suited clearly separating aspects function that criss-cross between different components structure, which makes it difficult reuse share their implementations. The aim...

10.1093/aob/mcr121 article EN Annals of Botany 2011-07-01

Realistic virtual models of leaf surfaces are important for several applications in the plant sciences, such as modelling agrichemical spray droplet movement and spreading on surface. In this context, required to be smooth enough facilitate use mathematical equations that govern motion droplet. Although an effective approach is apply discrete smoothing D2-spline algorithms reconstruct from three-dimensional scanned data, difficulties arise when dealing with wheat (Triticum aestivum L.)...

10.1071/fp14058 article EN Functional Plant Biology 2014-09-22
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