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Artículos de revistas sobre el tema "Rare plants – Western Australia"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 14 de febrero de 2022

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1

Miller, Ben P., David R. Symons, and Matthew D. Barrett. "Persistence of rare species depends on rare events: demography, fire response and phenology of two plant species endemic to a semiarid Banded Iron Formation range." Australian Journal of Botany 67, no. 3 (2019): 268. http://dx.doi.org/10.1071/bt18214.

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The association of rare plant species and Banded Iron Formation (BIF) ranges in semiarid Western Australia is a noted phenomenon. These ranges are also a focus of iron ore exploration and mining. Decisions and planning required for development, conservation and management resulting from this interest, often consider translocation of these threatened species. Nonetheless, little is known about the ecology of BIF-endemic species to support any such decisions. We assessed population structure, patterns of growth, mortality, recruitment, reproduction and in situ seedbank persistence for two declar

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2

Kennedy, J., and G. Weste. "Vegetation Changes Associated With Invasion by Phytophthora cinnamomi on Monitored Sites in the Grampians, Western Australia." Australian Journal of Botany 34, no. 3 (1986): 251. http://dx.doi.org/10.1071/bt9860251.

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The effects of invasion by Phytophthora cinnamomi were measured on sites representing the larger forest regions of the Grampians. Changes were obvious at first, with the death of more than 50% of the species including large plants such as Xanthorrhoea australis, but soon became dificult to detect as susceptible species were replaced by field-resistant graminoids. Reductions were assessed in species heterogeneity and plant density during 1976, at the onset of disease and from 1977 to 1984. Susceptible species disappeared from infested forest and no re-emergence was observed. Less-susceptible pl

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3

Cox, Brad. "Granite Outcrops Symposium." Pacific Conservation Biology 4, no. 3 (1998): 271. http://dx.doi.org/10.1071/pc98271a.

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Western Australia is a flat landscape. Granite outcrops are one of the few features that rise above the terrain. This makes them unique landmarks for people, and islands for plants and animals. They are highly significant in terms of their geological, biological and cultural values. They contain some of the world's oldest rocks, are an important source of water, often contain aboriginal heritage sites and are refuges for many rare and endangered flora and fauna.

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4

Touchell, DH, KW Dixon, and B. Tan. "Cryopreservation of Shoot-Tips of Grevillea scapigera (Proteaceae): a Rare and Endangered Plant From Western Australia." Australian Journal of Botany 40, no. 3 (1992): 305. http://dx.doi.org/10.1071/bt9920305.

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Cryopreservation of leaf, petiole, stem pieces and shoot-tips was investigated as a means for long-term maintenance of germplasm of the rare and endangered species, Grevillea scapigera A.S. George. Crypreservation was only achieved using shoot-tips or axillary buds and a slow-cooling regime with the aid of an improvised freezing device. The highest survival of thawed explants (20%) was obtained with 4-week-old in vitro shoot-tips cultured for 48 h in a prefreezing liquid culture medium supplemented with 5% dimethylsulfoxide. The pretreated shoot-tips were frozen in a liquid medium containing 1

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5

Briggs, BG, LAS Johnson, and SL Krauss. "The species of Alexgeorgea, a Western Australian genus of the restionaceae." Australian Systematic Botany 3, no. 4 (1990): 751. http://dx.doi.org/10.1071/sb9900751.

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The three species of Alexgeorgea Carlquist are revised, including A. ganopoda L. Johnson & B. Briggs, a newly described rare species of the Mt Frankland–Bow River region of the south-west of Western Australia.

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6

Olde, Peter. "Grevillea pieroniae Olde (Proteaceae: Grevilleoideae: Hakeinae), a rare new species in the Triloba Group from the Stirling Range, Western Australia, and a short history of the group." Telopea 23 (2020): 227–35. http://dx.doi.org/10.7751/telopea14783.

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Twenty-one Grevillea species currently comprise the Triloba Group sensu Flora of Australia, or Group 1 sensu The Grevillea Book. All species except the transcontinental species G. anethifolia R.Br. are distributed in southwest Western Australia. Grevillea pieroniae Olde, herein described, is currently treated as Grevillea sp. Stirling Range (D.J. McGillivray 3488 & A.S. George) by the Western Australian Herbarium. It has some affinity with Grevillea anethifolia through shared possession of similar truncate-conical to cylindrical pollen-presenters. Grevillea pieroniae is a rare species that

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7

Pierce, Nuri B., and Michael G. Simpson. "Polyaperturate pollen types and ratios of heteromorphism in the monocot genus Conostylis (Haemodoraceae)." Australian Systematic Botany 22, no. 1 (2009): 16. http://dx.doi.org/10.1071/sb08040.

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Pollen aperture heteromorphism (variation of aperture number in pollen grains within each flower and in all plants of a taxon) is described in the diverse monocot genus Conostylis R.Br. (Haemodoraceae) and that of related genera, all endemic to Western Australia. We report results of pollen observations from 153 specimens. In Conostylis, aperture number varies greatly, with biporate, triporate, tetraporate and polyporate pollen present, features considered rare and possibly developmentally significant for monocots. Pollen aperture types and their ratios in this genus are stable and consistent

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8

Walker, E., M. Byrne, B. Macdonald, D. Nicolle, and J. McComb. "Clonality and hybrid origin of the rare Eucalyptus bennettiae (Myrtaceae) in Western Australia." Australian Journal of Botany 57, no. 3 (2009): 180. http://dx.doi.org/10.1071/bt08148.

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Clonality and hybrid origin influence the conservation status of rare and restricted species. Eucalyptus bennettiae Carr & Carr is a rare species known only from a few individuals that may be clonal and may have arisen through hybridisation between other co-occurring species. The hybrid status and clonality of E. bennettiae was investigated with analysis of microsatellite variation in E. bennettiae compared with its putative parents, E. lehmannii subsp. parallela, E. sporadica and E. astringens subsp. redacta, identified through morphological characteristics. Analysis of microsatellite var

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9

Butcher, Ryonen. "New taxa of 'leafless' Tetratheca (Elaeocarpaceae, formerly Tremandraceae) from Western Australia." Australian Systematic Botany 20, no. 2 (2007): 139. http://dx.doi.org/10.1071/sb06015.

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The relationships among rare ‘leafless’ species of Tetratheca Sm. occurring on banded ironstone ranges near Koolyanobbing, Western Australia, and allied, unclassified, populations from Eneabba, Newdegate and the Die Hardy Range have been assessed by molecular characters. These findings, in conjunction with morphological investigations, have identified a new species and two new subspecies from within the ‘T. aphylla group’ and these are formally described here. Tetratheca nephelioides R.Butcher, is geographically restricted to the Eneabba area and has close morphological affinity to T. aphylla

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10

Li, C. X., Hua Li, K. Sivasithamparam, T. D. Fu, Y. C. Li, S. Y. Liu, and M. J. Barbetti. "Expression of field resistance under Western Australian conditions to Sclerotinia sclerotiorum in Chinese and Australian Brassica napus and Brassica juncea germplasm and its relation with stem diameter." Australian Journal of Agricultural Research 57, no. 10 (2006): 1131. http://dx.doi.org/10.1071/ar06066.

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Sclerotinia stem rot, caused by Sclerotinia sclerotiorum, has become one of the most serious disease problems in oilseed rape-growing areas in Australia. Sources of resistance to this disease have been sought worldwide. In this study, germplasm comprising 42 Brassica napus and 12 Brassica juncea accessions from China and Australia, was screened for resistance to Sclerotinia stem rot under Western Australian field conditions. Resistance was confirmed in some germplasm from China and new sources of resistance were identified in germplasm from Australia. Furthermore, our study found that the seve

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11

Hopper, Stephen D., and Nathan K. McQuoid. "Two new rare species and a new hybrid in Eucalyptus series Tetrapterae (Myrtaceae) from southern coastal Western Australia." Australian Systematic Botany 22, no. 3 (2009): 180. http://dx.doi.org/10.1071/sb06034.

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Three new rare taxa allied to the conspicuous, common four-winged mallee (Eucalyptus tetraptera Turcz.) are described. E. sweedmaniana is a large-leaved and prostrate coastal mallee known only from Mount Arid, Western Australia. E. brandiana, a non-lignotuberous mallet, occupies spongolite hilltops and escarpments near the Fitzgerald River Inlet in Fitzgerald River National Park, Western Australia. A single hybrid mallet, E. arborella × brandiana, is described from the type locality of E. brandiana. Both new species and the new hybrid show potential for horticultural use, given their compact h

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12

Ladd, P. G., C. J. Yates, R. Dillon, and R. Palmer. "Pollination ecology of Tetratheca species from isolated, arid habitats (Banded Iron Formations) in Western Australia." Australian Journal of Botany 67, no. 3 (2019): 248. http://dx.doi.org/10.1071/bt18249.

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Pollination and reproductive ecology of arid zone species in Australia are neglected topics. This is particularly true of rare species, some of which are threatened by mining operations. The bee community at Windarling Range in southern Western Australia and the pollination ecology of four rare Tetratheca taxa with distributions restricted to Banded Iron Formation inselbergs in the arid south-west were examined in winter and spring to understand if pollination rate was affecting the reproductive ecology of the plants. The bee fauna on the Windarling Range was sampled using coloured pan traps a

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13

Orchard, A. E. "A revision of Cassinia (Asteraceae: Gnaphalieae) in Australia. 7. Cassinia subgenus Achromolaena." Australian Systematic Botany 30, no. 4 (2017): 337. http://dx.doi.org/10.1071/sb17033.

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The present paper completes a revision of the endemic Australian genus Cassinia R.Br. Cassinia subgenus Achromolaena comprises two sections, namely, section Achromolaena of seven species (C. laevis, C. arcuata, C. uncata, C. tenuifolia, C. collina, C. subtropica, and C. quinquefaria), and Cassinia section Siftonia, which contains two species (C. sifton and C. theodorii). Cassinia laevis is divided into western (C. laevis subsp. laevis) and eastern (C. laevis subsp. rosmarinifolia (A.Cunn.) Orchard, comb. et stat. nov.) taxa. Examination of the type of C. arcuata showed that this name is synony

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14

Crisp, Michael D., and Gregory T. Chandler. "Contributions Towards a Revision of Daviesia (Fabaceae: Mirbelieae). V. D. cardiophylla sens. lat." Australian Systematic Botany 10, no. 3 (1997): 321. http://dx.doi.org/10.1071/sb96015.

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Three new species, Daviesia cunderdin, D. euryloba and D. umbonata, are described from south-western Western Australia. The first is a recently discovered rare and endangered species from near the town after which it is named. The latter two are segregated from the widespread and variable species D. cardiophylla F.Muell. Full descriptions, illustrations, a distribution map and a key to all four species are presented.

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15

Pegg, KG, RG Shivas, NY Moore, and S. Bentley. "Characterization of a unique population of Fusarium oxysporum f.sp. cubense causing Fusarium wilt in Cavendish bananas at Carnarvon, Western Australia." Australian Journal of Agricultural Research 46, no. 1 (1995): 167. http://dx.doi.org/10.1071/ar9950167.

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A unique population of Fusarium oxysporum f. sp. cubense affecting Cavendish cv. Williams banana plants was characterized using vegetative compatibility, volatile production, RAPD-PCR analysis, pectic enzyme production and pathogenicity. The isolates were more like race 1 isolates than race 4 isolates, although they were capable of attacking Cavendish clones. The Carnarvon isolates did not belong to any of the vegetative compatibility groups (VCGs) known to occur in Australia or overseas; they belonged in the 'inodoraturn' volatile group; they had 29% genetic similarity to race 4 isolates and

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16

Keighery, Greg J., Neil Gibson, Stephen van Leeuwen, Michael N. Lyons, and Sue Patrick. "Biological survey and setting priorities for flora conservation in Western Australia." Australian Journal of Botany 55, no. 3 (2007): 308. http://dx.doi.org/10.1071/bt06102.

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Biological survey has been an integral component of conservation planning in Western Australia for >30 years, providing baseline data for reserve selection and the management of biodiversity at the genetic, species and community levels. Flora surveys are particularly important, given the diverse and poorly documented nature of the state’s vascular flora. Surveys have been conducted at the following four scales: regional, subregional, local and individual species. At all scales, flora surveys have provided detail on individual taxon distribution, have identified previously unknown or unrecog

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17

Bunn, Eric, and Kingsley W. Dixon. "In Vitro Propagation of the Rare and Endangered Grevillea scapigera (Proteaceae)." HortScience 27, no. 3 (March 1992): 261–62. http://dx.doi.org/10.21273/hortsci.27.3.261.

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Micropropagation, including adventitious shoot growth from leaf sections, was achieved for Grevillea scapigera (Proteaceae), a rare and endangered species from Western Australia. Shoot tips were initiated on filter paper supports with liquid WPM (Woody Plant Medium) and supplemented with 20 μm zeatin riboside and 2 μm GA3. Shoots were then incubated on WPM solidified with agar and supplemented with 5 μm kinetin and 0.5 μm BA, which produced an approximate 6-fold multiplication rate per month. Up to three adventitious shoots were induced from 0.7-cm2 leaf sections after 6 to 7 weeks on solid 1/

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18

Kaur, P., C. X. Li, M. J. Barbetti, M. P. You, H. Li, and K. Sivasithamparam. "First Report of Powdery Mildew Caused by Erysiphe cruciferarum on Brassica juncea in Australia." Plant Disease 92, no. 4 (April 2008): 650. http://dx.doi.org/10.1094/pdis-92-4-0650c.

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In Australia, Brassica juncea (L.) Czern & Coss (Indian mustard) has the potential as a more drought-tolerant oilseed crop than the B. napus L., with the first canola-quality B. juncea varieties released in Australia in 2006 and first sown for commercial production in 2007. Increased production of B. juncea is expected to result in the appearance of diseases previously unreported in Australia. In the spring of 2007 at the University of Western Australia field plots at Crawley (31.99°S, 115.82°E), Western Australia, plants of B. juncea genotypes from Australia and China had extensive stem c

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19

Macphail, Michael K., and Robert S. Hill. "What was the vegetation in northwest Australia during the Paleogene, 66–23million years ago?" Australian Journal of Botany 66, no. 7 (2018): 556. http://dx.doi.org/10.1071/bt18143.

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Fossil pollen and spores preserved in drillcore from both the upper South Alligator River (SARV) in the Kakadu National Park, Northern Territory and the North-West Shelf, Western Australia provide the first record of plants and plant communities occupying the coast and adjacent hinterland in north-west Australia during the Paleogene 66 to 23million years ago. The palynologically-dominant woody taxon is Casuarinaceae, a family now comprising four genera of evergreen scleromorphic shrubs and trees native to Australia, New Guinea, South-east Asia and Pacific Islands. Rare taxa include genera now

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20

Butcher, Ryonen, Margaret Byrne, and Darren M. Crayn. "Evidence for convergent evolution among phylogenetically distant rare species of Tetratheca (Elaeocarpaceae, formerly Tremandraceae) from Western Australia." Australian Systematic Botany 20, no. 2 (2007): 126. http://dx.doi.org/10.1071/sb06017.

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Morphological and molecular investigations of taxon relationships among rare species of Tetratheca Sm. occurring near Koolyanobbing, Western Australia, have confirmed the distinctness of T. aphylla F.Muell., T. harperi F.Muell. and T. paynterae Alford and identified three new rare taxa from collections affiliated with T. aphylla and T. paynterae. The recognition of these taxa at specific and sub-specific ranks is based on their different degrees of morphological and molecular divergence, combined with geographic disjunction. Cladistic analysis of nrDNA internal transcribed spacer and cpDNA trn

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21

McDougall, K. L., R. J. Hobbs, and G. E. St Hardy. "Vegetation of Phytophthora cinnamomi-infested and adjoining uninfested sites in the northern jarrah (Eucalyptus marginata) forest of Western Australia." Australian Journal of Botany 50, no. 3 (2002): 277. http://dx.doi.org/10.1071/bt01096.

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The vegetation of seven sites in the northern jarrah forest of Western Australia infested with Phytophthora cinnamomi was recorded and compared with adjoining vegetation. The number of species per quadrat was found to be the same in vegetation affected by P. cinnamomi as in healthy vegetation, although there were more species overall in affected vegetation. Vegetation of uninfested sites had a higher cover and more species per quadrat of trees and shrubs and lower cover and fewer species per quadrat of annual plants than vegetation of infested sites. Although many species that are known to be

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22

Bougoure, Jeremy, Mark Brundrett, Andrew Brown, and Pauline F. Grierson. "Habitat characteristics of the rare underground orchid Rhizanthella gardneri." Australian Journal of Botany 56, no. 6 (2008): 501. http://dx.doi.org/10.1071/bt08031.

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Rhizanthella gardneri R.S.Rogers is an entirely subterranean mycoheterotrophic orchid known only from two isolated populations within south-western Western Australia (WA). This rare species appears restricted to habitats dominated by species of the Melaleuca uncinata complex. R. gardneri purportedly forms a tripartite relationship with Melaleuca1, via a connecting mycorrhizal fungus, for the purpose of carbohydrate and nutrient acquisition. Here, we quantify key climate, soil and vegetation characteristics of known R. gardneri habitats to provide baseline data for monitoring of known R. gardne

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23

Meney, K. A., K. W. Dixon, and J. S. Pate. "Reproductive Potential of Obligate Seeder and Resprouter Herbaceous Perennial Monocots (Restionaceae, Anarthriaceae, Ecdeiocoleaceae) from South-western Western Australia." Australian Journal of Botany 45, no. 5 (1997): 771. http://dx.doi.org/10.1071/bt96028.

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Pre- and post-dispersal reproductive success was studied in 22 species from three related Southern Hemisphere families, Restionaceae, Ecdeiocoleaceae and Anarthriaceae. Pre-dispersal success was compared for resprouter and obligate seeder species using seed: ovule ratios and carpel: flower ratios. The data indicated a high level of variability between taxa but pre-dispersal reproductive success of obligate seeders was significantly higher (67% conversion of ovules to seeds) than that of resprouters (35%). Two seeders, an extremely rare species (‘Chordifex’ abortivus) and a strongly clonal spec

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24

Barbetti, MJ. "Breakdown in resistance of subterranean clovers to clover scorch disease (Kabatiella caulivora)." Australian Journal of Agricultural Research 46, no. 3 (1995): 645. http://dx.doi.org/10.1071/ar9950645.

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In spring 1990, in the Australasian Subterranean Clover and Alternative Legume Improvement Program field plots at Denmark, Western Australia, subterranean clover cultivars and crossbred lines normally highly resistant to clover scorch disease caused by Kabatiella caulivora, were severely affected by this disease. Testing the response of subterranean clover varieties to Kabatiella isolates taken from plants from these plots indicates the arrival of a new race of the fungus. The new race differs from all other isolates in overcoming the previously outstanding resistance of cultivars Green Range,

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25

Jones, R. A. C., B. A. Coutts, and J. Hawkes. "Yield-limiting potential of Beet western yellows virus in Brassica napus." Australian Journal of Agricultural Research 58, no. 8 (2007): 788. http://dx.doi.org/10.1071/ar06391.

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Losses in seed yield and quality caused by infection with Beet western yellows virus (BWYV) alone or in combination with direct feeding damage by Myzus persicae (green peach aphid) were quantified in field experiments with Brassica napus (canola, oilseed rape) in the ‘grainbelt’ region of south-western Australia. Plants infected with BWYV and infested with M. persicae were introduced into plots early to provide infection sources and spread BWYV to B. napus plants. Insecticides were applied as seed dressings and/or foliar applications to generate a wide range of BWYV incidences in plots. Coloni

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26

Shepherd, Kelly A., Andrew Perkins, Joel Collins, Margaret Byrne, and Kevin R. Thiele. "Morphological and molecular evidence supports the recognition of a new subspecies of the critically endangered Pityrodia scabra (Lamiaceae)." Australian Systematic Botany 26, no. 1 (2013): 1. http://dx.doi.org/10.1071/sb12009.

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Taxonomic delineation of closely related taxa can be difficult, particularly in regions such as southern Western Australia where a highly diverse flora exhibits complex patterns of subtle morphological variation and genetic structuring and where some taxa have highly disjunct populations. A combined approach utilising highly variable, non-coding chloroplast gene regions and morphological data is used here to help delimit cryptic taxa in the rare Western Australian species Pityrodia scabra A.S.George. The species comprises disjunct populations over 400 km of the Western Australian wheatbelt fro

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27

Brennan, R. F., and M. D. A. Bolland. "Soil and tissue tests to predict the potassium requirements of canola in south-western Australia." Australian Journal of Experimental Agriculture 46, no. 5 (2006): 675. http://dx.doi.org/10.1071/ea04218.

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The predominantly sandy soils of south-western Australia have become potassium (K) deficient for spring wheat (Triticum aestivum L.) production due to the removal of K from soil in grain and hay. The K requirements of canola (rape, Brassica napus L.) grown in rotation with wheat on these soils are not known and were determined in the study reported here. Seed (grain) yield increases (responses) of canola to applications of fertiliser K occurred at sites where Colwell soil test K values (top 10 cm of soil) were <60 mg/kg soil. Grain yield responses to applied K occurred when concentrations o

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28

Rossiter, RC, and WJ Collins. "Genetic diversity in Old Subterranean Clover (Trifolium subterraneum L.) Populations in Western Australia. I. Pastures sown initially to the Dwalganup strain." Australian Journal of Agricultural Research 39, no. 6 (1988): 1051. http://dx.doi.org/10.1071/ar9881051.

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Subterranean clover burrs were collected during summer from 28 sites, 10 of which were in the <500 mm annual rainfall zone. All sites had been sown to the Dwalganup strain, 30-50 years ago. Spaced plants were grown from seed from burr subsamples of each population. Several morphological characters, flowering dates, and oestrogenic isoflavones in late spring leaf samples were determined. At maturity, burr samples were collected from each plant, and the isozyme patterns in seeds were determined for eight enzyme systems using starch gel electrophoresis. Populations from the lower rainfall (&lt

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29

Robinson, T. P., G. Di Virgilio, D. Temple-Smith, J. Hesford, and G. W. Wardell-Johnson. "Characterisation of range restriction amongst the rare flora of Banded Ironstone Formation ranges in semiarid south-western Australia." Australian Journal of Botany 67, no. 3 (2019): 234. http://dx.doi.org/10.1071/bt18111.

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Banded Ironstone Formation (BIF) ranges feature numerous rare and endemic plant species. We tested whether non-occurrence in neighbouring ranges is due to habitat dissimilarity across five groups of proximal ranges for three sets of species (18 taxa). Set 1 comprised 15 BIF-specialist species centred on the Helena and Aurora Range (HAR); Set 2, of one BIF species endemic to Mt Jackson and Set 3, of two non-BIF species. All species were used as input into ecological niche models to determine the importance and behaviour of five environmental variables derived from 2m resolution LiDAR imagery ov

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30

Perold, S. M. "Studies in the Sphaerocarpales (Hepaticae) from southern Africa. 1. The genus Monocarpus and its only member, M. sphaerocarpus." Bothalia 29, no. 2 (October 1, 1999): 225–30. http://dx.doi.org/10.4102/abc.v29i2.592.

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A taxonomic account of the genus Monocarpus and its only species, M. sphaerocarpus, is presented. The species was initially discovered on salt pans in Western Australia, and only later, in southern Africa. It is extremely rare and the structure of the minute thalli is difficult to determine, also to describe and to illustrate. As far as could be determined, no SEM micrographs o f the thalli and spores have been published before, nor has the capsule wall been illustrated.

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31

Krauss, Siegfried L., and Janet Anthony. "Genetic impacts of habitat loss on the rare Banded Ironstone Formation endemic Ricinocarpos brevis (Euphorbiaceae)." Australian Journal of Botany 67, no. 3 (2019): 183. http://dx.doi.org/10.1071/bt18131.

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Ricinocarpos brevis (Euphorbiaceae) is a declared rare species currently known from only three Banded Ironstone Formation (BIF) ranges (Perrinvale, Johnston and Windarling Ranges) in the Yilgarn region of Western Australia. The present study assessed the potential impact of proposed mining on genetic diversity within R. brevis. Approximately 30 plants were sampled from each of 14 sites across the known distribution of R. brevis. Genetic variation and its spatial structure was assessed with 144 polymorphic AFLP markers that were generated by two independent primer pairs: M-CTG/P-AC (81 markers)

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32

Vincent, Brian J., Sarah Barrett, Anne Cochrane, and Michael Renton. "Germination characteristics and the relationship between population structure, soil seed bank density and fire response in the rare endemic Stachystemon vinosus (Halford & R.J.F.Hend.) (Euphorbiaceae) from southern Western Australia." Seed Science Research 29, no. 2 (June 2019): 124–34. http://dx.doi.org/10.1017/s0960258519000126.

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AbstractThe regeneration niche defines the specific environmental requirements of the early phases of a plant's life cycle. It is critical for the long-term persistence of plant populations, particularly for obligate seeders that are highly vulnerable to stochastic events in fire-prone ecosystems. Here, we assessed germination characteristics and the relationship between population structure, soil seed bank density and fire response in Stachystemon vinosus (Euphorbiaceae), a rare endemic shrub from Western Australia, from burnt and long unburnt habitats. Many plants in long unburnt habitat wer

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33

Start, A. N. "Mistletoe flora (Loranthaceae and Santalaceae) of the Kimberley, a tropical region in Western Australia, with particular reference to fire." Australian Journal of Botany 61, no. 4 (2013): 309. http://dx.doi.org/10.1071/bt13021.

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The mistletoe flora of the tropical Kimberley region of Western Australia was studied over a 30-year period, with a particular emphasis on distributions, use of hosts and effects of fire. The results were compared with those of a similar study undertaken in the Pilbara, a more arid tropical region in the same State. The flora consisted of one genus with three species in the Santalaceae and five genera with 22 species (one with two varieties) in the Loranthaceae. Amyema was the largest genus in both regions. Four species are regarded as Kimberley endemics but two of them may also occur in the N

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Sinclair, Elizabeth, Belinda Cheetham, Siegfried Krauss, and Richard Hobbs. "Morphological and molecular variation in Conospermum triplinervium (Proteaceae), the tree smokebush: implications for bushland restoration." Australian Journal of Botany 56, no. 5 (2008): 451. http://dx.doi.org/10.1071/bt07137.

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Ecological restoration benefits from information on population genetic structure and variation within a species to make informed decisions on where to source material of the local genetic provenance. Conospermum triplinervium is extremely rare in Bold Park, a large bushland remnant currently undergoing restoration in Perth, Western Australia. We sampled plants from Bold Park and six other native populations across the northern half of the species’ range to assess patterns of morphological and genetic variation. There was considerable variation across six leaf measures with significant differen

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35

Eshraghi, L., M. P. You, and M. J. Barbetti. "First Report of White Leaf Spot Caused by Pseudocercosporella capsellae on Brassica juncea in Australia." Plant Disease 89, no. 10 (October 2005): 1131. http://dx.doi.org/10.1094/pd-89-1131b.

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Brassica juncea (L.) Czern & Coss (mustard) has potential as a more drought-tolerant oilseed crop than the Brassica napus, and the first two canola-quality B. juncea cultivars will be sown as large strip trials across Australia in 2005. This will allow commercial evaluation of oil and meal quality and for seed multiplication for the commercial release Australia-wide in 2006. Inspection of experimental B. juncea field plantings at Beverley (32°6′30″S, 116°55′22″E), and Wongan Hills (30°50′32″S, 116°43′33″E), Western Australia in September 2004 indicated the occurrence of extensive leaf spot

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Yates, Colin J., Philip G. Ladd, David J. Coates, and Shelley McArthur. "Hierarchies of cause: understanding rarity in an endemic shrub Verticordia staminosa (Myrtaceae) with a highly restricted distribution." Australian Journal of Botany 55, no. 3 (2007): 194. http://dx.doi.org/10.1071/bt06032.

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Verticordia staminosa C.Gardner & A.C.George subsp. staminosa is an extremely rare shrub occurring as an isolated population of ~1200 plants on a granite outcrop in the semi-arid agricultural region of Western Australia, separated from its closest relative V. staminosa subsp. cylindracea by 400 km. We aimed to determine a hierarchy of causes for explaining the extremely restricted distribution of subsp. staminosa, and to determine the genetic relationships among populations within both subspecies. We measured allozyme variation in all known populations of the two subspecies. There were exc

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37

Brundrett, Mark C. "A Comprehensive Study of Orchid Seed Production Relative to Pollination Traits, Plant Density and Climate in an Urban Reserve in Western Australia." Diversity 11, no. 8 (July 26, 2019): 123. http://dx.doi.org/10.3390/d11080123.

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The pollination of 20 common terrestrial orchids was studied in a 60-ha urban banksia and eucalypt dominated woodland in Western Australia. Five years of data (24,000 flowers, 6800 plants) measured fruit set relative to floral areas, capsule volumes, climate, phenology, pollination mechanisms, disturbance tolerance and demography. Pollination varied from 0–95% of flowers, floral displays from 90–3300 mm2 and capsules from 15–1300 mm3 per spike. Pollination traits strongly influenced outcomes, with self-pollination highest (59—95%), followed by sexually deceptive autumn or winter-flowering (18–

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38

Tremblay, Raymond L., Maria-Eglée Perez, Matthew Larcombe, Andrew Brown, Joe Quarmby, Doug Bickerton, Garry French, and Andrew Bould. "Dormancy in Caladenia: a Bayesian approach to evaluating latency." Australian Journal of Botany 57, no. 4 (2009): 340. http://dx.doi.org/10.1071/bt08163.

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Dormancy is common in many terrestrial orchids in southern Australia and other temperate environments. The difficulty for conservation and management when considering dormancy is ascertaining whether non-emergent plants are dormant or dead. Here we use a multi-state capture–recapture method, undertaken over several seasons, to determine the likelihood of a plant becoming dormant or dying following its annual emergent period and evaluate the frequency of the length of dormancy. We assess the transition probabilities from time series of varying lengths for the following nine terrestrial orchids

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39

Li, H., K. Sivasithamparam, and M. J. Barbetti. "Breakdown of a Brassica rapa subsp. sylvestris Single Dominant Blackleg Resistance Gene in B. napus Rapeseed by Leptosphaeria maculans Field Isolates in Australia." Plant Disease 87, no. 6 (June 2003): 752. http://dx.doi.org/10.1094/pdis.2003.87.6.752a.

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Blackleg, caused by Leptosphaeria maculans, is a major disease of oilseed rape (Brassica napus) grown in Canada, Europe, and Australia. Cv. Surpass 400 was released in Australia in 2000 as the most resistant cultivar to L. maculans. It carries a single dominant resistance gene from B. rapa subsp. sylvestris. This cultivar usually shows a hypersensitive response to L. maculans characterized by small, dark brown lesions that are necrotic, localized, and without pycnidia on cotyledons, leaves, and stems. However, in 2001 on a Western Australian experimental farm, a small proportion of the lesions

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40

Abdullah, Araz S., Mark R. Gibberd, and John Hamblin. "Co-infection of wheat by Pyrenophora tritici-repentis and Parastagonospora nodorum in the wheatbelt of Western Australia." Crop and Pasture Science 71, no. 2 (2020): 119. http://dx.doi.org/10.1071/cp19412.

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The pathogenic fungal species Pyrenophora tritici-repentis (Ptr) and Parastagonospora nodorum (Pan) are common in many wheat-producing parts of the world. These two fungi cause tan spot and septoria nodorum blotch, respectively, frequently co-infecting wheat leaves. Empirical studies of this and other co-infections are rare because of the visual similarity of symptoms and the lack of robust methods for quantifying the abundance of pathogens associated with the co-infection. Here, we use a recently developed molecular method that simultaneously distinguishes and quantifies, in DNA equivalent, t

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41

Ohlsen, Daniel J., Leon R. Perrie, Lara D. Shepherd, and Michael J. Bayly. "Taxonomic status and distribution of the critically endangered Christmas Island spleenwort (Asplenium listeri, Aspleniaceae): it is not as rare as we thought." Australian Systematic Botany 27, no. 6 (2014): 372. http://dx.doi.org/10.1071/sb14047.

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Asplenium listeri C.Chr. has been considered endemic to Christmas Island and is one of only two fern species listed as Critically Endangered under Australia’s Environment Protection and Biodiversity Conservation Act. Its status as a distinct species has been questioned because of morphological similarity to the widespread A. polyodon G.Forst., which also occurs on Christmas Island. Molecular analyses revealed that A. listeri and plants attributed to A. polyodon from coastal limestone in New Caledonia and Vanuatu share the same rbcL, trnL–trnF and rps4–trnS haplotype and that other samples of A

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42

Shearer, B. L., C. E. Crane, R. G. Fairman, and M. J. Grant. "Occurrence of Armillaria luteobubalina and Pathogen-mediated Changes in Coastal Dune Vegetation of South-western Australia." Australian Journal of Botany 45, no. 5 (1997): 905. http://dx.doi.org/10.1071/bt96084.

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Sixty-two Armillaria luteobubalina Watling & Kiledisease centres were assessed along the coast from near Cervantes, 160 kmnorth-west of Perth, to Cape Arid, 120 km east of Esperance. Disease centresranged from 0.02 to 6.5 ha in size (mean ± s.e., 1.7 ± 0.2 ha).Most disease centres were active, with mainly old deaths occurring in only7% of centres. Impact was low in only 3% of centres. Diseasecentres mainly occurred on calcareous sands of Holocene dune systems.Susceptible hosts from the Proteaceae, Mimosaceae and Myrtaceae tended to bedominant small trees or shrubs and their death resulted

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Wright, Wendy, Xuan Zhu, and Mateusz Okurowski. "Identification of key environmental variables associated with the presence of Toothed Leionema (Leionema bilobum serrulatum) in the Strzelecki Ranges, Victoria, Australia." Australian Journal of Botany 59, no. 3 (2011): 207. http://dx.doi.org/10.1071/bt10197.

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Toothed Leionema is one of four subspecies of Leionema bilobum from the Rutaceae family. A dense shrub or small tree, growing to ~4 m high, it is a poorly investigated species which is considered rare in Victoria, Australia. This paper presents the results of a study using Geographical Information Systems and Weights-of-Evidence predictive modelling to assess the importance of seven environmental factors in determining habitat suitability for this species in the Strzelecki Ranges, Victoria. This method is particularly useful in understanding the distribution of rare species, especially where t

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44

Brundrett, Mark C. "Scientific approaches to Australian temperate terrestrial orchid conservation." Australian Journal of Botany 55, no. 3 (2007): 293. http://dx.doi.org/10.1071/bt06131.

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This review summarises scientific knowledge concerning the mycorrhizal associations, pollination, demographics, genetics and evolution of Australian terrestrial orchids relevant to conservation. The orchid family is highly diverse in Western Australia (WA), with over 400 recognised taxa of which 76 are Declared Rare or Priority Flora. Major threats to rare orchids in WA include habitat loss, salinity, feral animals and drought. These threats require science-based recovery actions resulting from collaborations between universities, government agencies and community groups. Fungal identification

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45

Joyce, E. M., R. Butcher, M. Byrne, P. F. Grierson, M. Hankinson, and K. R. Thiele. "Taxonomic resolution of the Tetratheca hirsuta (Elaeocarpaceae) species complex using an integrative approach." Australian Systematic Botany 30, no. 1 (2017): 1. http://dx.doi.org/10.1071/sb16040.

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The Tetratheca hirsuta Lindl. species complex from south-west Western Australia is one of the last unresolved complexes in this Australian endemic genus, and comprises the highly variable T. hirsuta, two rare, phrase-named taxa, and the closely allied T. hispidissima Steetz. An integrative approach, incorporating multivariate morphometric analysis and molecular phylogenetic and phenetic analyses of nrDNA (ETS) and cpDNA (ndhF–trnL, rpl16, trnS–trnG5ʹ2S), was used to investigate taxonomic boundaries within the complex. Morphological data showed clear divergence within the complex, and allowed s

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46

McDonald, M. W. "Revision of Acacia tumida (Leguminoseae: Mimosoideae) and close allies, including the description of three rare taxa." Australian Systematic Botany 16, no. 2 (2003): 139. http://dx.doi.org/10.1071/sb02012.

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Acacia tumida F.Muell ex. Benth. is a wide-ranging species in north-western Australia, with high morphological variability. Overseas it is cultivated for firewood, windbreaks and sand stabilisation. To assist in its domestication, the taxonomy of A. tumida is revised and its close allies, A. difficilis Maiden and A. retinervis Benth., circumscribed. The following six new taxa in the A. tumida group are described: A. areolata M.W.McDonald, A.�dissimilis M.W.McDonald, A. seclusa M.W.McDonald (syn. A. tumida var. pubescens Maiden), A. tumida var. extenta M.W.McDonald, A. tumida var. kulparn M.W.M

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47

Thurling, N., and R. Kaveeta. "Yield improvement of oilseed rape (Brassica napus L.) in a low rainfall environment. I. Utilization of genes for early flowering in primary and secondary gene pools." Australian Journal of Agricultural Research 43, no. 3 (1992): 609. http://dx.doi.org/10.1071/ar9920609.

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The extent to which time to flowering of a Brassica napus commercial cultivar could be reduced through utilization of genes in its primary and secondary pools was examined with particular reference to yield improvement in lower rainfall environments. The B. napus breeding line RU2 and the B. campestris population Chinoli C42, which were used as sources of early flowering genes to be incorporated into the commercial B. napus cultivar Wesbrook, flowered significantly earlier than Wesbrook with or without vernalization and/or long days. In the cross of Wesbrook with RU2, the substantial variation

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48

Batty, A. L., K. W. Dixon, M. Brundrett, and K. Sivasithamparam. "Long-term storage of mycorrhizal fungi and seed as a tool for the conservation of endangered Western Australian terrestrial orchids." Australian Journal of Botany 49, no. 5 (2001): 619. http://dx.doi.org/10.1071/bt01029.

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The impact of seed drying, seed storage and development of testing procedures for seed viability assessment was undertaken for a selection of common taxa with congeners that are rare and endangered (Caladenia, Diuris, Pterostylisand Thelymitra). Freshly collected seed showed significantly lower levels of germination compared with seed that had been subjected to drying over silica gel for 24 h. Seed dried over silica gel for 24 h and plunged into liquid nitrogen exhibited a further increase in germination levels. Germination of seed stored at 4, 18 or 22˚C for 1 year was substantially higher th

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49

Jones, BA, RA How, and DJ Kitchener. "A field study of Pseudocheirus occidentalis (Marsupialia : Petauridae) I. Distribution and Habitat." Wildlife Research 21, no. 2 (1994): 175. http://dx.doi.org/10.1071/wr9940175.

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Surveys aimed at determining the distribution and habitat of the rare and endangered western ringtail possum (Pseudocheirus occidentalis) were undertaken in south-western Australia during 1990-92. Surveys relied on sightings of animals, or their characteristic faecal pellets or dreys. Habitat descriptions were collected in areas occupied by P. occidentalis to describe the vegetation and topography. Additional information about habitat was collected at subsets of sites to reflect leaf nutrient levels (nitrogen, phosphorus and potassium) of the major food plants, and to reflect the relative sene

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50

Krauss, Siegfried L., and Janet M. Anthony. "The potential impact of mining on population genetic variation in the Banded Ironstone Formation endemic Tetratheca erubescens (Elaeocarpaceae)." Australian Journal of Botany 67, no. 3 (2019): 172. http://dx.doi.org/10.1071/bt18054.

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Tetratheca erubescens is a narrowly endemic species including ~6300 plants restricted to a 2-km2 distribution on the south Koolyanobbing Range Banded Ironstone Formation (BIF) in Western Australia. A key objective of the present study was to characterise population genetic variation, and its spatial structuring across the entire distribution of T. erubescens, to enable a quantification of genetic variation that may be affected by proposed mining of the BIF. In total, 436 plants (~30 at each of 14 sites) from across the entire distribution were sampled, genotyped and scored for allelic variatio

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