Australian Journal of Botany
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Internal secretory spaces in thickened underground systems of Asteraceae species
Australian Journal of Botany - Tập 57 Số 3 - Trang 229 - 2009
Secretory structures are present in many vascular plants and have an important
ecological role as a plant defence mechanism against herbivors and pathogens.
Internal secretory spaces of lipid substances are widespread in the Asteraceae.
However, information about the occurrence of these structures in thickened
underground systems is sparse, compared with what we know about aerial systems.
The main...
The origin and anatomy of rhizophores in Vernonia herbacea and V. platensis (Asteraceae) from the Brazilian Cerrado
Australian Journal of Botany - Tập 53 Số 3 - Trang 273 - 2005
The aim of this work is to study the origin and anatomy of rhizophores in two
Asteraceae species from the Brazilian Cerrado: Vernonia herbacea (Vell.) Rusby
and V. platensis (Spreng.) Less. In both species, axillary buds from the
cotyledonary node give rise to the first rhizophores. As rhizophores develop,
these organs branch to form new rhizophores from their axillary buds that
constitute a sympo...
Nickel accumulation by species of Alyssum and Noccaea (Brassicaceae) from ultramafic soils in the Urals, Russia
Australian Journal of Botany - Tập 63 Số 2 - Trang 78 - 2015
Cool temperate regions have a limited number of species able to accumulate
nickel (Ni) and other heavy metals in above-ground tissues. Our study was
conducted in order to find accumulators of Ni on serpentine soils in the Middle
and Southern Urals. Above-ground tissues of plants as well as soil samples were
collected in 10 ultramafic massifs. Our results confirmed hyperaccumulation
activity of Aly...
Biological Nitrogen Fixation and Root-Nodule Bacteria (Rhizobium Sp. and Bradyrhizobium Sp.) In Two Rehabilitating Sand Dune Areas Planted With Acacia Spp
Australian Journal of Botany - Tập 33 Số 5 - Trang 595 - 1985
This paper reports a study of biological nitrogen fixation in two sand dune
regions of New South Wales where planted Acacia spp. had been used in
revegetation programmes. At one location (Bridge Hill Ridge), natural regrowth
had produced a complex plant community, and native legumes in addition to the
planted acacias were present. The other area (Wanda Beach) was a grossly
disturbed site which con...
Cyclones as an ecological factor in tropical lowland rain-forest, North Queensland
Australian Journal of Botany - Tập 6 Số 3 - Trang 220 - 1958
The influence of cyclones on the structural and floristm composition of tropical
lowland and foothill rain-forest in north Queensland is briefly described. Local
topographic effects, as well as the general frequency and intensity of cyclones,
are important. The local intensification of wind velocities, probably exceeding
100 m.p.h., which occur regularly in parts of the coastal corridor south of
C...
Effects of the diploidisation process upon the 5S and 35S rDNA sequences in the allopolyploid species of the Dilatata group of Paspalum (Poaceae, Paniceae)
Australian Journal of Botany - Tập 67 Số 7 - Trang 521 - 2019
The Dilatata group of Paspalum includes species and biotypes native to temperate
South America. Among them, five sexual allotetraploids (x = 10) share the same
IIJJ genome formula: P. urvillei Steud, P. dasypleurum Kunze ex Desv., P.
dilatatum subsp. flavescens Roseng., B.R. Arrill. & Izag., and two biotypes
P. dilatatum Vacaria and P. dilatatum Virasoro. Previous studies suggested P.
intermed...
The phytogeography of the Australian region
Australian Journal of Botany - Tập 8 Số 2 - Trang 75 - 1960
The Australian phytogeographic region is defined as including the Australian
mainland and Tasmania. This region may be subdivided into the Tropical Zone in
the north and east, the Temperate Zone in the south and east, and the Eremaean
Zone in the arid centre. Delineation of these zones is closely linked with
present day climates but their floristic constituents also reflect selection
resulting fro...
Corrigendum to: New handbook for standardised measurement of plant functional traits worldwide
Australian Journal of Botany - Tập 64 Số 8 - Trang 715 - 2016
Plant functional traits are the features (morphological, physiological,
phenological) that represent ecological strategies and determine how plants
respond to environmental factors, affect other trophic levels and influence
ecosystem properties. Variation in plant functional traits, and trait syndromes,
has proven useful for tackling many important ecological questions at a range of
scales, giving...
The utility of the eddy covariance techniques as a tool in carbon accounting: tropical savanna as a case study
Australian Journal of Botany - Tập 53 Số 7 - Trang 663 - 2005
Global concern over rising atmospheric CO2 concentrations has led to a
proliferation of studies of carbon cycling in terrestrial ecosystems. Associated
with this has been widespread adoption of the eddy covariance method to provide
direct estimates of mass and energy exchange between vegetation surfaces and the
atmosphere. With the eddy covariance method, fast-response instruments (10–20Hz)
are ty...
Phylogeography of the rare Gymnocarpos przewalskii (Caryophyllaceae): indications of multiple glacial refugia in north-western China
Australian Journal of Botany - Tập 60 Số 1 - Trang 20 - 2012
We investigated the phylogeography of Gymnocarpos przewalskii Maxim.
(Caryophyllaceae), a rare relictual shrub restricted to north-western China, in
the context of Quaternary climate oscillations. Three cpDNA regions (psbA–trnH,
ycf6–psbM and rpl32–trnL (UAG)) were sequenced for 160 individuals from 16
populations. High genetic diversity (hT = 0.930, hS = 0.425) and a significant
phylogeographic s...
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