A5065168881- Plant Parasitism and Resistance
- Plant and animal studies
- Agronomic Practices and Intercropping Systems
- Photosynthetic Processes and Mechanisms
- Plant Water Relations and Carbon Dynamics
- Geology and Paleoclimatology Research
- Legume Nitrogen Fixing Symbiosis
- Plant responses to elevated CO2
- Plant Diversity and Evolution
- Ecology and Vegetation Dynamics Studies
- Plant Stress Responses and Tolerance
- Plant biochemistry and biosynthesis
- Amazonian Archaeology and Ethnohistory
- Plant Surface Properties and Treatments
- Chromatography in Natural Products
- Paleontology and Stratigraphy of Fossils
- Allelopathy and phytotoxic interactions
- Lichen and fungal ecology
- History of Science and Natural History
- Marine Biology and Ecology Research
- Evolution and Paleontology Studies
- Marine and coastal plant biology
- Light effects on plants
- Tree-ring climate responses
- Indigenous Health and Education
Universidade de São Paulo
2021-2024
The University of Adelaide
2008-2022
Manchester Metropolitan University
2016-2022
Northumbria University
2015-2016
University of Wollongong
2006-2011
Iwate University
2009
University of Sheffield
1997-2000
James Cook University
1997
Abstract Background Sacred lotus is a basal eudicot with agricultural, medicinal, cultural and religious importance. It was domesticated in Asia about 7,000 years ago, cultivated for its rhizomes seeds as food crop. particularly noted 1,300-year seed longevity exceptional water repellency, known the effect. The latter property due to nanoscopic closely packed protuberances of self-cleaning leaf surface, which have been adapted manufacture industrial paint, Lotusan. Results genome China...
It is well known that physical leaf traits influence functions, and these vary across environmental gradients. Stomata can function, with changes in density size affecting potential water loss, CO2 uptake, also cooling. Plasticity stomatal occurs response to factors; however, identifying which factors have the greatest often difficult. We investigated variation size, loss from open stomata (gwmax), Australian native shrub Dodonaea viscosa subsp. angustissima, a range of including...
The terrestrial flora of Antarctica's frozen continent is restricted to sparse ice-free areas and dominated by lichens bryophytes. These plants frequently battle sub-zero temperatures, extreme winds reduced water availability; all influencing their ability survive grow. Antarctic mosses, however, can have canopy temperatures well above air temperature. At midday, exceed 15°C, depending on moss turf content. In this study, the optimum temperature photosynthesis was determined for six species:...
We analyzed the impact of growth at either 350 (ambient) or 700 (elevated) μL L−1 CO2 on key elements C4 pathway (photosynthesis, carbon isotope discrimination, and leaf anatomy) using cereal sorghum (Sorghum bicolor L. Moench.). Gas-exchange analysis response photosynthesis indicated that both carboxylation efficiency saturated rate were lower in plants grown elevated relative to ambient CO2. This was accompanied by a 49% reduction phosphoenolpyruvate carboxylase content leaves (area basis)...
Abstract: Parasitic angiosperms are a taxonomically diverse group of plants that invade host tissues and remove resources via specialized structure known as the haustorium. Through haustorium, carbon, water mineral nutrients withdrawn, often at expense growth vigour. In addition to removal from plants, many parasitic also able impact effects on photosynthesis. this paper we review what is about how affect photosynthesis has productivity. Holoparasites, lack chlorophyll, act extra sinks for...
Background and AimsWhile invasive species may escape from natural enemies in the new range, establishment of novel biotic interactions with native to invaded range can determine their success. Biological control plant populations be achieved by manipulation a species' range. Interactions were therefore investigated between parasitic an legume Mediterranean-type woodlands South Australia.
Abstract The survivorship of dipterocarp seedlings in the deeply shaded understorey South‐east Asian rain forests is limited by their ability to maintain a positive carbon balance. Photosynthesis during sunflecks an important component gain. To investigate effect elevated CO 2 upon photosynthesis and growth under sunflecks, Shorea leprosula were grown controlled environment conditions at ambient or . Equal total daily photon flux density (PFD) (∼7·7 mol m −2 d −1 ) was supplied as either...
Abstract We report results from in vivo measurements, using oxygen isotope discrimination techniques, of fluxes through the alternative and cytochrome respiratory pathways thermogenic plant tissue, floral receptacle sacred lotus (Nelumbo nucifera). Fluxes both were measured thermoregulating flowers undergoing varying degrees thermogenesis response to ambient temperature. Significant increases pathway flux found receptacles with temperatures 16°C 20°C above ambient, but not those lesser...
Responses of Alocasia macrorrhiza (L.) G. Don, Castanospora alphandii (F. Muell.) F. Muell. and Alpinia hylandii R. Smith, growing in a tropical rainforest understorey, to excess light during sunflecks were investigated using chlorophyll fluorescence techniques by analysing xanthophyll cycle activity. A fourth species, the pioneerOmalanthus novo-guineensis (Warb.) Schum., small gap, was also studied. In all three understorey species there large rapid decreases proportion open Photosystem II...
The relationships between heat production, alternative oxidase (AOX) pathway flux, AOX protein, and carbohydrates during floral development in Nelumbo nucifera (Gaertn.) were investigated. Three distinct physiological phases identified: pre-thermogenic, thermogenic, post-thermogenic. shift to thermogenic activity was associated with a rapid, 10-fold increase protein. Similarly, rapid decrease protein occurred post-thermogenesis. This synchronicity contrasts other plants where increases some...
Abstract Sacred lotus (Nelumbo nucifera) regulates temperature in its floral chamber to 32°C 35°C across ambient temperatures of 8°C 40°C with heating achieved through high alternative pathway fluxes. In most oxidase (AOX) isoforms, two cysteine residues, Cys1 and Cys2, are highly conserved play a role posttranslational regulation AOX. Further control occurs via interaction reduced α-keto acids, such as pyruvate. Here, we report on the vitro AOX isolated from thermogenic receptacle tissues...
Abstract Knowledge regarding the use of groundwater by plants has implications for successful mine rehabilitation and revegetation programs in water‐limited environments. In this study, we combined several approaches to investigate water sources used Acacia papyrocarpa (Western myall) far west South Australia, including stable isotopes, potential, soil chemistry, root mapping techniques. Plant δ 18 O signatures potentials were compared against a range possible sources: rainwater, surface (≤1...
Abstract Plant invasions cause biodiversity loss and degradation in ecosystems worldwide. The invasive species involved may be introduced, or native invaders, controlling them is a major global challenge. Here, we highlight an emerging role for parasitic plants suppressing species, thus aiding restoration of affected habitats. Compelling empirical evidence provided by three study systems located Central Europe, southern Australia eastern China. Further cases parasitism have been recorded...
Associations between plants and nitrogen (N)-fixing rhizobia intensify with decreasing N supply come at a carbon cost to the host. However, what additional impact parasitic have on their leguminous hosts' budget in terms of effects host physiology growth is unknown. Under glasshouse conditions, Ulex europaeus Acacia paradoxa either uninfected or infected hemiparasite Cassytha pubescens were supplied (high (HN)) not (low (LN)) extra N. The photosynthetic performance association measured....
1. The ability of rain‐forest plants to utilize sunflecks for growth was investigated using the following species: Alocasia macrorrhiza, Diploglottis diphyllostegia, Micromelum minutum and Omalanthus novo‐guinensis. 2. Growth analysis gas‐exchange measurements were used assess performance four species when exposed either constant or fluctuating light. 3. Final biomass (g dry wt) in D. diphyllostegia M. grown under lightfleck regime (total daily PFD = 7·02 mol m –2 day –1 ) significantly...
Infection with Cassytha pubescens R.Br, an Australian native hemiparasitic plant, can lead to death of the invasive shrub, Cytisus scoparius L. Link (Scotch broom). We examined influence C. on photosynthetic physiology determine whether this might contribute infected plants. Infected had significantly lower rates, stomatal conductance and transpiration, higher Ci (internal [CO2]), than uninfected Rapid light response curves, determined using chlorophyll fluorescence, indicated...
• Philodendron bipinnatifidum inflorescences heat up to 42°C and thermoregulate. We investigated whether they generate via the cytochrome oxidase pathway uncoupled by uncoupling proteins (pUCPs), or alternative (AOX). Contribution of AOX pUCPs heating in fertile (FM) sterile (SM) male florets was determined using a combination oxygen isotope discrimination, protein substrate analyses. Both FM SM thermoregulated independently for 30 h ex planta. In both floret types, contributed > 90%...
Endothermic heating of floral tissues and even thermoregulation is known to occur in a number plant species across wide taxonomic range. The mechanisms by which flowers heat, however, are only just beginning be understood, less about how regulated response changes ambient temperature. We have recently demonstrated that the alternative pathway respiration, oxidase (AOX) rather than cytochrome C (COX) acts as terminal electron acceptor, responsible for heat generation one thermoregulating...
Environmental factors alter the impacts of parasitic plants on their hosts. However, there have been no controlled studies how water availability modulates stem hemiparasites' effects A glasshouse experiment was conducted to investigate association between Australian native hemiparasite Cassytha pubescens and introduced host Ulex europaeus under high (HW) low (LW) supply. had a significant, negative effect total biomass U. europaeus, which more severe in HW than LW. Regardless watering...
Abstract Many studies have investigated the effect of parasitic plants on their hosts; however, few examined how parasite impact is affected by host size. In a glasshouse experiment, we Australian native hemiparasitic vine, Cassytha pubescens, major invasive shrub, Ulex europaeus, different sizes. Infected had significantly lower total, shoot, and root biomass, but parasite’s was more severe small than large hosts. When infected, not hosts nodule biomass. Irrespective size, infection...
ABSTRACT The C 4 cereal Sorghum bicolor was grown under either ambient (350 μmol mol −1 ) or elevated (700 [CO 2 ] in the presence absence of 3 obligate root hemi‐parasites Striga hermonthica S. asiatica. Both uninfected and infected sorghum plants were taller had greater biomass, photosynthetic rates, water‐use efficiencies leaf areas compared with ]. There no evidence any downregula‐tion photosynthesis at Biomass lower both ], although larger relative impact infection on host biomass same...
Rising atmospheric CO2 is increasing the availability of dissolved in ocean relative to HCO3−. Currently, many marine primary producers use HCO3− for photosynthesis, but this energetically costly. Increasing passive uptake pathways could provide energy savings, leading increased productivity and growth plants. Inorganic carbon-uptake mechanisms seagrass Amphibolis antarctica were determined using carbonic anhydrase inhibitor acetazolamide (AZ) buffer tris(hydroxymethyl)aminomethane (TRIS)....
Background and Aims There have been very few studies investigating the influence of light on effects hemiparasitic plants their hosts, despite fact that hemiparasites are capable photosynthesis but also access carbon (C) from host. In this study we manipulated availability to limit in an established hemiparasite its determined whether affected parasite's impact growth performance two different hosts. We expected limiting reducing autotrophic C gain parasite (and possibly increasing...