Australian Journal of Botany
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Biological Nitrogen Fixation and Root-Nodule Bacteria (Rhizobium Sp. and Bradyrhizobium Sp.) In Two Rehabilitating Sand Dune Areas Planted With Acacia SppThis 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 w... ...
Australian Journal of Botany - Tập 33 Số 5 - Trang 595 - 1985
Demographic history and niche conservatism of tropical rainforest trees separated along an altitudinal gradient of a biogeographic barrierThe genetic disjunctions and distributions of long-lived species provide valuable signatures of past demographic response to environmental change. Here we use genetic markers to study two Elaeocarpus species from the Australian Wet Tropics to understand changes in palaeodistribution and demography associated with environmental change on either side of the Black Mountain Corridor (BMC). Con... ...
Australian Journal of Botany - Tập 62 Số 5 - Trang 438 - 2014
Remote Sensing of Water Content in Eucalyptus Leaves
The spectral reflectance of leaves from several
Eucalyptus species was measured over the 400–2500
nm wavelengths with a laboratory spectroradiometer. The relationship of
reflectance with the gravimetric water content and equivalent water thickness
(EWT) of the leaves was analysed. The results showed that EWT was strongly
correlated with reflectance in several wavelength regions. No signif... ...
Australian Journal of Botany - Tập 47 Số 6 - Trang 909 - 1999
Silica in Woody Stems Scanning electron microscopy has been used to examine silica isolated by chemical means from the
wood of 32 species of woody perennial. The silica consists of aggregate grains lying free in the
lumina or in ray and xylem parenchyma cells in 24 of the species. It occurs as dense silica in the other
species, filling the lumina or lining the internal surfaces of vessels (and fibres) in all c... ...
Australian Journal of Botany - Tập 22 Số 2 - Trang 211 - 1974
Assessing the role of light availability in the regeneration of Araucaria angustifolia (Araucariaceae)The role of Brazilian pine (Araucaria angustifolia) in the process of forest succession is a topic of increasing controversy. While some authors consider the species to be pioneer, others consider it to be a climax species in relict temperate forests. We designed a field experiment to assess the role of light availability on the regeneration of A. angustifolia. The following three forests,... ...
Australian Journal of Botany - Tập 50 Số 6 - Trang 741 - 2002
Internal secretory spaces in thickened underground systems of Asteraceae species
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... ...
Australian Journal of Botany - Tập 57 Số 3 - Trang 229 - 2009
The origin and anatomy of rhizophores in Vernonia herbacea and V. platensis (Asteraceae) from the Brazilian Cerrado
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 constitu... ...
Australian Journal of Botany - Tập 53 Số 3 - Trang 273 - 2005
Nickel accumulation by species of Alyssum and Noccaea (Brassicaceae) from ultramafic soils in the Urals, Russia
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 activ... ...
Australian Journal of Botany - Tập 63 Số 2 - Trang 78 - 2015
Cyclones as an ecological factor in tropical lowland rain-forest, North QueenslandThe 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 so... ...
Australian Journal of Botany - Tập 6 Số 3 - Trang 220 - 1958
Effects of the diploidisation process upon the 5S and 35S rDNA sequences in the allopolyploid species of the Dilatata group of Paspalum (Poaceae, Paniceae)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... ...
Australian Journal of Botany - Tập 67 Số 7 - Trang 521 - 2019
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