Journal articles: 'Allocasuarina verticillata'

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Duponnois, R., S. Diédhiou, J. L. Chotte, and M. Ourey Sy. "Relative importance of the endomycorrhizal and (or) ectomycorrhizal associations in Allocasuarina and Casuarina genera." Canadian Journal of Microbiology 49, no. 4 (March 1, 2003): 281–87. http://dx.doi.org/10.1139/w03-038.

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This work was carried out to determine the relative importance of the endomycorrhizal and (or) ectomycorrhizal association in species of Casuarina and Allocasuarina. Under axenic conditions, Pisolithus and Scleroderma isolates formed ectomycorrhizas with a mantle and a Hartig net on Allocasuarina verticillata but failed to form a Hartig net on Casuarina glauca. In a controlled soil system, C. glauca was inoculated with the endomycorrhizal fungus Glomus intraradices Schenck & Smith, and A. verticillata was inoculated with Pisolithus albus IR100 Bougher & Smith and (or) G. intraradices. Both symbionts significantly stimulated growth in both plant species. For A. verticillata, its growth response to ectomycorrhizal inoculation was higher than to endomycorrhizal inoculation. When both symbionts were inoculated, antagonism among the fungal isolates was observed with a higher ectomycorrhizal colonization. These results showed that A. verticillata was ectomycorrhizal dependent, whereas C. glauca was endomycorrhizal dependent. From a practical point of view, this study shows the importance of selecting compatible mycorrhizal fungi for developing successful inoculation programmes. In addition, it would help to further research and determine the effect of ecto- and endo-mycorrhizal symbiosis on the formation and function of N2-fixing actinorhizal nodules.Key words: Casuarinaceae, ectomycorrhizas, arbuscular mycorrhizas, plant growth.

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Chapman, Tamra F., and David C. Paton. "Casuarina ecology: factors limiting cone production in the drooping sheoak, Allocasuarina verticillata." Australian Journal of Botany 55, no. 2 (2007): 171. http://dx.doi.org/10.1071/bt06089.

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Allocasuarina verticillata is an important species for biodiversity conservation on Kangaroo Island (South Australia) because it is the primary food source for the endangered glossy black-cockatoo, Calyptorhynchus lathami halmaturinus. Two potentially limiting factors, pollen and soil nutrients, were studied in the context of A. verticillata as foraging habitat for glossy black-cockatoos. Cone production was not limited by the amount of pollen available to female plants. The soils on which A. verticillata occurs on Kangaroo Island were low in nutrients. Available N, P and K were significantly increased via the application of slow-release fertiliser and the added nutrients resulted in a corresponding increase in the productivity of A. verticillata. The additional nutrients increased the number of cones produced on female branches, branch growth and potentially therefore, tree size. Since cone profitability appears to increase with tree size, the additional growth may also result in greater cone profitability in the long term. Adding slow-release fertiliser to small female A. verticillata trees and revegetation on sites with higher concentrations of soil nutrients would benefit the cockatoos. This is because other studies have shown that the cockatoos increase their foraging efficiency by cropping cones from large trees with greater cone profitability and branches with high densities of cones.

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Blackman, Christopher J., Gregory J. Jordan, and Robert J. E. Wiltshire. "Leaf gigantism in coastal areas: morphological and physiological variation in four species on the Tasman Peninsula, Tasmania." Australian Journal of Botany 53, no. 2 (2005): 91. http://dx.doi.org/10.1071/bt04040.

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Leaf gigantism is an example of marked morphological variation associated with abrupt environmental gradients of increasing coastal exposure. This study characterises the morphology and anatomy of leaf gigantism in four species across two habitats on the coastal headlands of the Tasman Peninsula, Tasmania, Australia. In addition, the genetic basis and adaptive significance of leaf gigantism are examined. Leaf gigantism was characterised in Leptospermum scoparium, Acacia verticillata and Allocasuarina monilifera by greater thickness and succulence, and by greater thickness and increased support tissue in Allocasuarina crassa. Glasshouse-grown seedlings of each species derived from exposed and inland field sites showed that leaf gigantism has both genetic and environmental components. Leaf succulence and a slower growth rate were shown to be heritable in seedlings from the exposed site of L. scoparium and A. verticillata, indicating genetic differentiation. In the reciprocal translocation trial, the higher degree of stress tolerance (as measured by chlorophyll florescence) exhibited by seedlings of L. scoparium and A. verticillata from the exposed site demonstrated the adaptive significance of leaf gigantism in these species. The ecological and evolutionary implications of leaf gigantism on the Tasman Peninsula are discussed.

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Svistoonoff, Sergio. "Cell of the month: Allocasuarina verticillata shoots expressing GFP." Nature Cell Biology 5, no. 4 (April 2003): 284. http://dx.doi.org/10.1038/ncb0403-284.

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Moncur, M. W., D. J. Boland, and J. L. Harbard. "Aspects of the Floral Biology of Allocasuarina verticillata (Casuarinaceae)." Australian Journal of Botany 45, no. 5 (1997): 857. http://dx.doi.org/10.1071/bt96009.

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Aspects of the floral biology of Allocasuarina verticillata were recorded in a natural stand in Canberra, Australia. The trees are dioecious, and flowering took place during the autumn to spring months (May–October). The female inflorescence consists of over 100 individual flowers, which remained receptive for up to 12 weeks. The proportion of individual flowers pollinated increased gradually over this time. The advantage of a long female receptive phase is that each inflorescence can potentially receive pollen from a number of male sources. Duration from pollination to fertilisation was 53–83 days. Male inflorescences dehisced over a 3–9 week period depending upon air temperatures. Pollen germination was highest at 10˚C and 15˚C and poor at 5˚C, 20˚C and 25˚C. Pollen grains remained turgid at the lower temperatures for at least 3 days. Seed germinated well at temperatures between 10˚C and 25˚C but there was a marked decline at 30˚C. Stratification of seed is suggested as a standard practice in germination tests. Results are discussed in relation to developing tree improvement strategies for domestication of the family Casuarinaceae.

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Zhang, Yong, Nigel England, Linda Broadhurst, Lan Li, Chonglu Zhong, and David Bush. "Gene Flow and Recruitment Patterns among Disjunct Populations of Allocasuarina verticillata (Lam.) L.A.S. Johnson." Forests 13, no. 7 (July 21, 2022): 1152. http://dx.doi.org/10.3390/f13071152.

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Allocasuarina verticillata (Lam.) L.A.S. Johnson is a widespread species in south-eastern Australia providing vegetation cover, protecting fragile soils and providing food for birds. Understanding the effects of gene flow on the recruitment patterns, genetic differentiation and structure of fragmented populations provides fundamental guidelines to underpin plant conservation strategies and activities. In this study, four spatially disjunct populations of A. verticillata were sampled to explore the effects of population size, reproductive patterns and pollen and seed dispersal on among-population genetic diversity, genetic differentiation and structure, using field survey and microsatellite marker techniques. It was found that stands of A. verticillata were predominantly sexually reproductive, but asexual reproduction through root suckering was an additional mode of reproduction. The reproductive success of A. verticillata is positively correlated with the effective population size rather than actual population size. The reduction in effective population size and increment of spatial isolation resulted in lower genetic diversity and higher inbreeding coefficient of progenies. Moderate pairwise genetic differentiation and weak genetic structure were identified. The results suggest that exogenous, wind-mediated pollen flow provides some maintenance of genetic diversity in the isolated stands. Seed dispersal appears mainly to be over short distances (i.e., within populations), but the infrequent transport of seeds between disjunct locations cannot be ruled out as another factor that may help maintain genetic diversity.

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Kirkpatrick, Jamie B., and Ian Jenkinson. "Effects of Increasing Fire Frequency on Conservation Values in Eucalyptus Grassy Woodland in the Process of Invasion by Allocasuarina verticillata." Fire 5, no. 2 (February 25, 2022): 31. http://dx.doi.org/10.3390/fire5020031.

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Woody thickening is a widespread phenomenon in the grassy woodlands of the world, often with deleterious effects on nature conservation values. We aimed to determine whether increasing the frequency of planned fire prevented woody thickening and improved conservation values in a Eucalyptus viminalis grassy woodland in the process of invasion by Allocasuarina verticillata (henceforth Allocasuarina) in Hobart, Tasmania, Australia. We used a before–after control intervention design. Ten plots from which detailed vegetation data were collected in 2018 (before the burns), 2019 (between burns), 2020 (between burns) and 2021 (after the burns) were randomly located in each of four blocks. Two of the blocks were burned in both 2018 and 2021. One block was burned only in 2021, and another was not burned at all. Mechanical thinning of Allocasuarina took place in 2021 in six plots in one unburned block and in three twice-burned plots. The fires were low intensity and patchy, reflecting the reality of planned burns in this environment. Thus, there were unburned plots mixed with burned plots in each of the three burned blocks. We compared changes in vegetation and cover attributes between a preburn survey in 2018 and a postburn survey in 2021, between five fire history/thinning classes (unburned, no thinning; unburned, thinning; twice burned; burned in 2018 only; burned in 2021 only). Fires in both 2018 and 2021 resulted in lower litter cover and higher exotic species richness than one fire in 2021. Exotic species richness increase between 2018 and 2021 was greater after fires in 2018 and 2021 than after a fire in 2021 alone. Exotic species richness was lowest six years after fire and highest one to three years after fire. The basal area of Allocasuarina was, counter-intuitively, less reduced by two fires in four years than by one. Mechanical thinning reduced shrub layer cover, which largely consisted of small trees, but did not affect basal area. Our data suggested that grass cover increased until five years after a fire, declining back to a low level by eight years. The implications of the results for conservation management are that the mechanical removal of young Allocasuarina may be successful in preventing its thickening and that burning at a five-year interval is likely to best maintain understorey conservation values. The counter-intuitive results related to Allocasuarina basal area emphasise the importance of understanding cumulative effects of fire regimes on fuel cycles and the consequent effects on tree mortality.

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Franche, C., D. Diouf, Q. V. Le, D. Bogusz, A. N'Diaye, H. Gherbi, C. Gobe, and E. Duhoux. "Genetic transformation of the actinorhizal tree Allocasuarina verticillata by Agrobacterium tumefaciens." Plant Journal 11, no. 4 (April 1997): 897–904. http://dx.doi.org/10.1046/j.1365-313x.1997.11040897.x.

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9

Phelep, Michèle, Annik Petit, Lori Martin, Emile Duhoux, and Jacques Tempé. "Transformation and Regeneration of a Nitrogen-Fixing Tree, Allocasuarina Verticillata Lam." Nature Biotechnology 9, no. 5 (May 1991): 461–66. http://dx.doi.org/10.1038/nbt0591-461.

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Santi, Carole, Uritza von Groll, Ana Ribeiro, Maurizio Chiurazzi, Florence Auguy, Didier Bogusz, Claudine Franche, and Katharina Pawlowski. "Comparison of Nodule Induction in Legume and Actinorhizal Symbioses: The Induction of Actinorhizal Nodules Does Not Involve ENOD40." Molecular Plant-Microbe Interactions® 16, no. 9 (September 2003): 808–16. http://dx.doi.org/10.1094/mpmi.2003.16.9.808.

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Two types of root nodule symbioses are known for higher plants, legume and actinorhizal symbioses. In legume symbioses, bacterial signal factors induce the expression of ENOD40 genes. We isolated an ENOD40 promoter from an actinorhizal plant, Casuarina glauca, and compared its expression pattern in a legume (Lotus japonicus) and an actinorhizal plant (Allocasuarina verticillata) with that of an ENOD40 promoter from the legume soybean (GmENOD402). In the actinorhizal Allocasuarina sp., CgENOD40-GUS and GmENOD40-2-GUS showed similar expression patterns in both vegetative and symbiotic development, and neither promoter was active during nodule induction. The nonsymbiotic expression pattern of CgENOD40-GUS in the legume genus Lotus resembled the nonsymbiotic expression patterns of legume ENOD40 genes however, in contrast to GmENOD40-2-GUS, CgENOD40-GUS was not active during nodule induction. The fact that only legume, not actinorhizal, ENOD40 genes are induced during legume nodule induction can be linked to the phloem unloading mechanisms established in the zones of nodule induction in the roots of both types of host plants.

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Gherbi, Hassen, Mathish Nambiar-Veetil, Chonglu Zhong, Jessy Félix, Daphné Autran, Raphaël Girardin, Virginie Vaissayre, Florence Auguy, Didier Bogusz, and Claudine Franche. "Post-Transcriptional Gene Silencing in the Root System of the Actinorhizal Tree Allocasuarina verticillata." Molecular Plant-Microbe Interactions® 21, no. 5 (May 2008): 518–24. http://dx.doi.org/10.1094/mpmi-21-5-0518.

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In recent years, RNA interference has been exploited as a tool for investigating gene function in plants. We tested the potential of double-stranded RNA interference technology for silencing a transgene in the actinorhizal tree Allocasuarina verticillata. The approach was undertaken using stably transformed shoots expressing the β-glucuronidase (GUS) gene under the control of the constitutive promoter 35S; the shoots were further transformed with the Agrobacterium rhizogenes A4RS containing hairpin RNA (hpRNA) directed toward the GUS gene, and driven by the 35S promoter. The silencing and control vectors contained the reporter gene of the green fluorescent protein (GFP), thus allowing a screening of GUS-silenced composite plantlets for autofluorescence. With this rapid procedure, histochemical data established that the reporter gene was strongly silenced in both fluorescent roots and actinorhizal nodules. Fluorometric data further established that the level of GUS silencing was usually greater than 90% in the hairy roots containing the hairpin GUS sequences. We found that the silencing process of the reporter gene did not spread to the aerial part of the composite A. verticillata plants. Real-time quantitative polymerase chain reaction showed that GUS mRNAs were substantially reduced in roots and, thereby, confirmed the knock-down of the GUS transgene in the GFP+ hairy roots. The approach described here will provide a versatile tool for the rapid assessment of symbiotically related host genes in actinorhizal plants of the Casuarinaceae family.

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Broadhurst, Linda M. "Genetic diversity and population genetic structure in fragmented Allocasuarina verticillata (Allocasuarinaceae) – implications for restoration." Australian Journal of Botany 59, no. 8 (2011): 770. http://dx.doi.org/10.1071/bt11253.

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Vegetation restoration in fragmented regions is constrained by limited supplies of high quality seed and an understanding of the scale over which seed can be moved without causing negative outcomes. ‘Local’ seed is often prescribed for restoration but in fragmented landscapes this restricts collecting to small, inbred populations. Six polymorphic microsatellites were used to examine genetic diversity and population genetic structure in seed collected from 18 fragmented natural populations and three restored populations of the wind-pollinated and dispersed tree Allocasuarina verticillata, a key restoration species. Smaller populations produced seed crops with significantly fewer alleles, lower allelic richness and less gene diversity. Most of the populations assessed, including the restored sites, produce genetically diverse seed crops suitable for restoration but smaller populations (<30 plants) should be augmented with seed from larger populations. Principal coordinate analysis, graph-theory and Bayesian analyses found little evidence of spatially predictable genetic structure across the study region, which probably reflects long distance gene dispersal preventing the development of strong spatial structure. The absence of strong spatial patterns suggests that seed can be moved beyond current 5–50-km limits while being mindful of strong selection gradients or conditions that might indicate locally adapted populations.

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Franche, Claudine, Diaga Diouf, Laurent Laplaze, Florence Auguy, Thierry Frutz, Maryannick Rio, Emile Duhoux, and Didier Bogusz. "Soybean (lbc3), Parasponia, and Trema Hemoglobin Gene Promoters Retain Symbiotic and Nonsymbiotic Specificity in Transgenic Casuarinaceae: Implications for Hemoglobin Gene Evolution and Root Nodule Symbioses." Molecular Plant-Microbe Interactions® 11, no. 9 (September 1998): 887–94. http://dx.doi.org/10.1094/mpmi.1998.11.9.887.

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The purpose of this study was to compare the control of expression of legume and nonlegume hemoglobin genes. We used the Casuarina glauca and Allocasuarina verticillata transformation system to examine the properties of the soybean (lbc3), Parasponia andersonii, and Trema tomentosa hemoglobin gene promoters in actinorhizal plants. Expression of the hemoglobin promoters gus genes was examined by fluorometric and histochemical assays. The fluorometric assays in various organs showed that the soybean and P. andersonii promoters were most active in nodules whereas the T. tomentosa promoter gave a very high activity in roots. The histochemical study showed that GUS activity directed by the soybean and the P. andersonii gus chimeric genes appeared mainly confined to the infected cells of the C. glauca and A. verticillata nodules. The T. tomentosa hemoglobin promoter was primarily expressed in the root's cortex and vascular tissue. The results indicate that the soybean, P. andersonii, and T. tomentosa hemoglobin promoters retain their cell-specific expression in transgenic members of the Casuarinaceae, suggesting a close relationship between legume, Ulmaceae member, and actinorhizal hemoglobin genes. The conservation of the mechanism for nodule-specific expression of soybean, P. andersonii, and C. glauca and A. verticillata hemoglobin genes is discussed in view of recent molecular phylogenetic data that suggest a single origin for the predisposition to form root nodule symbioses.

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Svistoonoff, Sergio, Mame-Ourèye Sy, Nathalie Diagne, David G. Barker, Didier Bogusz, and Claudine Franche. "Infection-Specific Activation of the Medicago truncatula Enod11 Early Nodulin Gene Promoter During Actinorhizal Root Nodulation." Molecular Plant-Microbe Interactions® 23, no. 6 (June 2010): 740–47. http://dx.doi.org/10.1094/mpmi-23-6-0740.

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The MtEnod11 gene from Medicago truncatula is widely used as an early infection-related molecular marker for endosymbiotic associations involving both rhizobia and arbuscular mycorrhizal fungi. In this article, heterologous expression of the MtEnod11 promoter has been studied in two actinorhizal trees, Casuarina glauca and Allocasuarina verticillata. Transgenic C. glauca and A. verticillata expressing a ProMtEnod11::β-glucuronidase (gus) fusion were generated and the activation of the transgene investigated in the context of the symbiotic associations with the N-fixing actinomycete Frankia and both endo- and ectomycorrhizal fungi (Glomus intraradices and Pisolithus albus, respectively). ProMtEnod11::gus expression was observed in root hairs, prenodules, and nodules and could be correlated with the infection of plant cells by Frankia spp. However, no activation of the gus reporter gene was detected prior to infection or in response to either rhizobial Nod factors or the wasp venom peptide MAS-7. Equally, ProMtEnod11::gus expression was not elicited during the symbiotic associations with either ecto- or endomycorrhizal fungi. These observations suggest that, although there is a conservation of gene regulatory pathways between legumes and actinorhizal plants in cells accommodating endosymbiotic N-fixing bacteria, the events preceding bacterial infection or related to mycorrhization appear to be less conserved.

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Kirkpatrick, J. B. "Vegetation change in an urban grassy woodland 1974 - 2000." Australian Journal of Botany 52, no. 5 (2004): 597. http://dx.doi.org/10.1071/bt03100.

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Few temporal studies document vegetation change in Australian temperate grassy woodlands. Floristic and structural data were collected from 68 randomly located sites in the Queens Domain, an urban grassy woodland remnant, in 1974, 1984, 1994 and 2000 and a search made for rare species. Species of conservation significance were concentrated at highly disturbed sites, whereas vegetation types of conservation significance decreased in area as a result of increases in the numbers of Allocasuarina verticillata, which caused a change in many unmown areas from Eucalyptus viminalis grassy woodland to E. viminalis–A. verticillata woodland/forest or A. verticillata open/closed forest. Structural changes were associated with changes in species composition and an increase in native-species richness. Increases in tree cover occurred where fires were most frequent, possibly as a result of the lack of mammalian herbivores. The frequencies of herbs and annual grasses were strongly affected by precipitation in the month of sampling. Half of the species that showed a consistent rise or fall through time were woody plants, approximately twice the number expected. In the dataset as a whole, species-richness variables were largely explained by varying combinations of variables related to moisture availability, altitude and the incidence of mowing. The strongest influences on species composition were the same, although slope and time since the last fire also contributed to multiple regression and generalised linear models. Compositional stability was positively related to native-species richness, whereas high levels of exotic-species richness occurred at both low and high levels of native-species richness. The maintenance of native-plant biodiversity on the Domain requires such counterintuitive measures as the maintenance of exotic trees and the control of native trees, demonstrating the contingencies of conservation management in fragmented vegetation that consists of a mixture of native and exotic species.

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Chapman, Tamra F., and David C. Paton. "Aspects of Drooping Sheoaks (Allocasuarina verticillata) that influence Glossy Black-Cockatoo (Calyptorhynchus lathami halmaturinus) foraging on Kangaroo Island." Emu - Austral Ornithology 106, no. 2 (June 2006): 163–68. http://dx.doi.org/10.1071/mu05021.

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Obertello, Mariana, Carole Santi, Mame-Oureye Sy, Laurent Laplaze, Florence Auguy, Didier Bogusz, and Claudine Franche. "Comparison of four constitutive promoters for the expression of transgenes in the tropical nitrogen-fixing tree Allocasuarina verticillata." Plant Cell Reports 24, no. 9 (June 7, 2005): 540–48. http://dx.doi.org/10.1007/s00299-005-0963-7.

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Broadhurst, Linda. "Pollen Dispersal in Fragmented Populations of the Dioecious Wind-Pollinated Tree, Allocasuarina verticillata (Drooping Sheoak, Drooping She-Oak; Allocasuarinaceae)." PLOS ONE 10, no. 3 (March 5, 2015): e0119498. http://dx.doi.org/10.1371/journal.pone.0119498.

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Oureye Sy, Mame, Maurice Sagna, Sire Diedhiou, Claudine Franche, Florence Auguy, and Emile Duhoux. "Devising an in vitro nodulation system for two actinorhizal plants: Allocasuarina verticillata (Lam.) L. Johnson and Casuarina glauca sieb. ex spreng (Casuarinaceae)." In Vitro Cellular & Developmental Biology - Plant 39, no. 5 (September 2003): 545–50. http://dx.doi.org/10.1079/ivp2003443.

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Svistoonoff, Sergio, Laurent Laplaze, Florence Auguy, John Runions, Robin Duponnois, Jim Haseloff, Claudine Franche, and Didier Bogusz. "cg12 Expression Is Specifically Linked to Infection of Root Hairs and Cortical Cells during Casuarina glauca and Allocasuarina verticillata Actinorhizal Nodule Development." Molecular Plant-Microbe Interactions® 16, no. 7 (July 2003): 600–607. http://dx.doi.org/10.1094/mpmi.2003.16.7.600.

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cg12 is an early actinorhizal nodulin gene from Casuarina glauca encoding a subtilisin-like serine protease. Using transgenic Casuarinaceae plants carrying cg12-gus and cg12-gfp fusions, we have studied the expression pattern conferred by the cg12 promoter region after inoculation with Frankia. cg12 was found to be expressed in root hairs and in root and nodule cortical cells containing Frankia infection threads. cg12 expression was also monitored after inoculation with ineffective Frankia strains, during my-corrhizae formation, and after diverse hormonal treatments. None of these treatments was able to induce its expression, therefore suggesting that cg12 expression is linked to plant cell infection by Frankia strains. Possible roles of cg12 in actinorhizal symbiosis are discussed.

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Pepper, John W. "A Survey of the South Australian Glossy Black-cockatoo (Calyptorhynchus lathami halmaturinus) and its Habitat." Wildlife Research 24, no. 2 (1997): 209. http://dx.doi.org/10.1071/wr94063.

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The endangered South Australian glossy black-cockatoo (Calyptorhynchus lathami halmaturinus) occurs only on Kangaroo Island, South Australia. A 1993 survey investigated the size, structure and distribution of the population, the quantity and quality of foraging habitat, and the effects of a 1991 fire that burned most habitat on the Island’s west coast. A total of 136 birds was counted, mostly on the island’s western north coast. Among birds identified by age and sex, 90% were adult and there were 1·4 adult males per female. Woodland of drooping sheoak (Allocasuarina verticillata) covered about 0·3% of the island, primarily on the western north coast. Grazing by sheep in much of the habitat reduced but did not prevent sheoak regeneration. Most habitat patches showed foraging signs, but most individual sheoak trees did not. The best predictor of foraging intensity across habitat patches was average seed mass per cone. The 1991 fire burned 14% of the island’s foraging habitat, and no cockatoos were found in the burned areas. The fire killed most sheoaks but not most eucalypts; burned sheoak woodland was regenerating from both seedlings and basal shoots. The results confirm that the population is critically small, and vulnerable to local events such as wildfires. They also suggest that both habitat quantity and quality are limiting factors for the subspecies.

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Delzoppo, Nicholas A., Karleah Berris, Daniella Teixeira, and Berndt van Rensburg. "The impact of fire on the quality of drooping sheoak (Allocasuarina verticillata) cones for the endangered Kangaroo Island glossy black-cockatoo (Calyptorhynchus lathami halmaturinus)." Global Ecology and Conservation 28 (August 2021): e01645. http://dx.doi.org/10.1016/j.gecco.2021.e01645.

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Chapman, Tamra F., and David C. Paton. "The glossy black-cockatoo (Calyptorhynchus lathami halmaturinus) spends little time and energy foraging on Kangaroo Island, South Australia." Australian Journal of Zoology 53, no. 3 (2005): 177. http://dx.doi.org/10.1071/zo04059.

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The endangered Kangaroo Island glossy black-cockatoo (Calyptorhynchus lathami halmaturinus) relies entirely on the seeds of the drooping sheoak (Allocasuarina verticillata) for food. The time budget of the glossy black-cockatoos and their foraging behaviour was recorded to provide an indication of whether their food supply was likely to be limiting. The foraging behaviour of non-breeding and breeding cockatoos was also compared to record the strategy they used to collect the additional energy needed to raise young. Glossy black-cockatoos spent a relatively small proportion of their time foraging, suggesting that the food supply was abundant in the habitats used for feeding. Non-breeding birds spent only 26% of their time feeding and breeding birds spent only 36% of their time feeding. The cockatoos spent 0.4% of their time flying, foraged in a mean of only five trees per day and harvested cones in no more than five bouts per tree. This shows that the cockatoos made few movements between drooping sheoaks and within the canopy of the sheoaks when foraging. When breeding, the cockatoos spent significantly more time per day foraging, cropped cones in significantly more bouts per tree and harvested significantly more cones per tree than non-breeding birds. This shows that breeding birds increased their energy intake without greatly increasing movement between trees. The small number of movements made by glossy black-cockatoos when foraging on Kangaroo Island reflects the abundance of food trees and may be a strategy to reduce the risk of predation.

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Ourèye Sy, Mame, Valérie Hocher, Hassen Gherbi, Laurent Laplaze, Florence Auguy, Didier Bogusz, and Claudine Franche. "The cell-cycle promoter cdc2aAt from Arabidopsis thaliana is induced in the lateral roots of the actinorhizal tree Allocasuarina verticillata during the early stages of the symbiotic interaction with Frankia." Physiologia Plantarum 130, no. 3 (July 2007): 409–17. http://dx.doi.org/10.1111/j.1399-3054.2007.00884.x.

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TAYLOR, GARY S., JOHN T. JENNINGS, MATTHEW F. PURCELL, and ANDY D. AUSTIN. "A new genus and ten new species of jumping plant lice (Hemiptera: Triozidae) from Allocasuarina (Casuarinaceae) in Australia." Zootaxa 3009, no. 1 (August 30, 2011): 1. http://dx.doi.org/10.11646/zootaxa.3009.1.1.

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Twelve species of jumping plant lice, Hemiptera: Psylloidea, in two genera are recognised from plants of the genus Allocasuarina (Casuarinaceae) in Australia. Aacanthocnema Tuthill & Taylor comprises two species that are here redescribed, Aa. casuarinae (Froggatt) and Aa. dobsoni (Froggatt), together with four new species, Aa. burckhardti Taylor, Aa. huegelianae Taylor, Aa. luehmannii Taylor, and Aa. torulosae Taylor. A new genus, Acanthocasuarina Taylor, comprises six new species: Ac. acutivalvis Taylor, Ac. campestris Taylor, Ac. diminutae Taylor, Ac. muellerianae Taylor, Ac. tasmanica Taylor, and Ac. verticillatae Taylor. Both genera are characterised by an elongate habitus, short Rs and short, triangular radial and cubital fore wing cells, ventrally produced genal processes beneath angular, overhanging apical margin of vertex, antennae short, and nymphs characteristically elongate, heavily sclerotised and scale-like. Species of Acanthocasuarina have rhinaria on antennal segments 4, 6, 8 and 9, the hind tibia has 1 outer and 2 inner spurs and the female proctiger has a posterior apical hook. In contrast, species of Aacanthocnema lack rhinaria on antennal segment 8 and sclerotised spurs on the hind tibia, and the female lacks a posterior apical hook on the proctiger. Trioza banksiae Froggatt stat. rev. is removed from Aacanthocnema. Keys to genera and species are provided, together with notes on their biology, host associations and biogeography.

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COOKE, B. D. "The effects of rabbit grazing on regeneration of sheoaks, Allocasuarina verticilliata and saltwater ti-trees, Melaleuca halmaturorum, in the Coorong National Park, South Australia." Austral Ecology 13, no. 1 (March 1988): 11–20. http://dx.doi.org/10.1111/j.1442-9993.1988.tb01414.x.

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"Allocasuarina verticillata." CABI Compendium CABI Compendium (January 7, 2022). http://dx.doi.org/10.1079/cabicompendium.4330.

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28

Berris, Karleah K., Ruby M. H. Jones, Xiangning Kok, Adrian K. J. McCafferty, Johannes K. Skirrow, and Trish Mooney. "The effect of inter-fire interval and fire severity on seedling germination and resprouting in Allocasuarina verticillata." Australian Journal of Botany, 2022. http://dx.doi.org/10.1071/bt22016.

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Journal articles on the topic 'Allocasuarina verticillata'

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