William Thomas SalterThe University of Sydney · Sydney Institute of Agriculture
William Thomas Salter
PhD
About
22
Publications
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120
Citations
Introduction
Additional affiliations
March 2014 - July 2014
August 2013 - present
January 2012 - September 2012
Education
September 2012 - February 2016
September 2007 - May 2011
Publications
Publications (22)
Background:
Being able to accurately assess the 3D architecture of plant canopies can allow us to better estimate plant productivity and improve our understanding of underlying plant processes. This is especially true if we can monitor these traits across plant development. Photogrammetry techniques, such as structure from motion, have been shown...
Vulnerability to cavitation in leaves is the result of highly adaptive anatomical and physiological traits that can be linked to water availability in a species' climate of origin. Despite similar gross leaf morphology, eucalypt species are often confined to specific climate envelopes across the variable rainfall environments of Australia. In this...
Enhancing the photosynthetic induction response to fluctuating light has been suggested as a key target for improvement in crop breeding programs, with the potential to substantially increase whole canopy carbon assimilation and contribute to crop yield potential. Rubisco activation may be the main physiological process that will allow us to achiev...
In this work, we developed a low-cost 3D scanner and used an open source data processing pipeline to phenotype the 3D structure of individual chickpea plants. Being able to accurately assess the 3D architecture of plant canopies can allow us to better estimate plant productivity and improve our understanding of underlying plant processes. This is e...
Enhancing the photosynthetic induction response to fluctuating light has been suggested as a key target for improvement in crop breeding programs, with the potential to substantially increase whole canopy carbon assimilation and contribute to crop yield potential. Rubisco activation may be the main physiological process that will allow us to achiev...
Suboptimal distribution of photosynthetic capacity in relation to light among leaves reduces potential whole-canopy photosynthesis. We quantified the degree of suboptimality in 160 genotypes of wheat by directly measuring photosynthetic capacity and daily irradiance in flag and penultimate leaves. Capacity per unit daily irradiance was systematical...
•Variation in temperature (T) is usually accompanied by changes in leaf water potential (Ψleaf), which may influence mesophyll conductance (gm). However, the effects of Ψleaf on gm have not yet been considered in models of the gm response to temperature. •Temperature responses of gm and Ψleaf and the response of gm to Ψleaf were studied in rice and...
Crop photosynthesis and yield are limited by slow photosynthetic induction in sunflecks. We quantified variation in induction kinetics across diverse genotypes of wheat for the first time. Following a preliminary study that hinted at wide variation in induction kinetics across 58 genotypes, we grew 10 genotypes with contrasting responses in a contr...
Ceptometry (the measurement of average photosynthetically active radiation under a plant canopy using many individual light sensors connected in parallel on a long bar) is commonly used to infer canopy light interception as well as leaf area index. Typically, the user places a ceptometer below the canopy and records a measurement, which is com- par...
Detailed instructions on how to build, calibrate and collect research quality data from PARbar ceptometers are presented.
Long Abstract
Ceptometry is a technique used to measure the transmittance of photosynthetically active radiation through a plant canopy using multiple light sensors connected in parallel on a long bar. Ceptometry is often used...
Highlight
Significant variation exists in the acclimation time of photosynthesis following dark-to-light transitions across wheat genotypes, under field and controlled conditions. Slow acclimation reduced daily carbon assimilation by up to 16%.
Abstract
Crop photosynthesis and yield are limited by slow photosynthetic induction in sunflecks. We qua...
Background
Existing methods for directly measuring photosynthetic capacity (Amax) have low throughput, which creates a key bottleneck for pre-breeding and ecological research. Currently available commercial leaf gas exchange systems are not designed to maximize throughput, on either a cost or time basis. ResultsWe present a novel multiplexed semi-p...
Replacement of phospholipids with phosphorus (P)-free lipids in cellular membranes has been identified as a mechanism facilitating fast rates of photosynthesis when phosphorus availability is limited. We measured photosynthetic rates, leaf and soil P fractions, and foliar membrane lipid compositions for five species (Geranium antrorsum, Ranunculus...
In nonagricultural systems, the relationship between intrinsic water-use efficiency (WUEi) and leaf nitrogen (Narea) is known to be stronger for legumes than for nonlegumes. We tested whether these relationships are retained for major agricultural legumes and nonlegumes. We compared the response to N nutrition of WUEi (and its component parts, phot...
ABSTRCT Recent literature suggests a shifting paradigm in relation to photobiology associated with ultraviolet (UV) radiation. UV has been repeatedly shown to be less detrimental to plant performance than previously thought. Nonetheless, relatively few plant species have been studied; too few to make definitive statements about effects of UV on pla...
Background
Pyrethroids are one of the most widespread and commonly used classes of insecticide and they are used in multiple roles including protecting potato crops from virus vector aphids. Resistance in some genotypes of a few species is now widespread but most species remain susceptible. The rate of virus transmission by two genotypes of the pea...
Projects
Project (1)
Photosynthetic nitrogen is typically distributed in a sub-optimal fashion in relation to light availability across plant canopies, but evidence suggests wide genetic variation in the degree of sub-optimality. We are quantifying variation in this trait across diverse genotypes of wheat and its wild relatives and exploring the underlying physiological mechanisms. This study is funded by the International Wheat Yield Partnership via the Grains Research and Development Corporation.
