Australian Journal of Botany Australian Journal of Botany Society
Southern hemisphere botanical ecosystems

Australian Journal of Botany

Australian Journal of Botany

Australian Journal of Botany is an international journal for the publication of original research and reviews in plant science with relevance to Southern Hemisphere ecosystems including ecology and ecophysiology, conservation biology and biodiversity, forest biology and management, cell and molecular biology, palaeobotany, reproductive biology and genetics, mycology and pathology and structure and development. Read more about the journalMore

Editor-in-Chief: Dick Williams

Current Issue

Australian Journal of Botany

Volume 65 Number 1 2017

BT16154Leaf and culm silicification of Pampas grass (Cortaderia selloana) developed on different soils from Pampean region, Argentina

Mariana Fernández Honaine, Natalia L. Borrelli, Margarita Osterrieth and Luis del Rio
pp. 1-10

Here we analysed the relation between the accumulation of silica-made particles and environmental and biological factors, a relation scarcely known in pampean grasses. Grasses, along with other plants, produce glass-like particles in their tissues which have multiple functions during plant growth and development. Understanding the factors affecting silica accumulation in plants has implications for managing agroecosystems and Si-requiring crops such as rice.

Arillastrum gummiferum (Myrtaceae) and Nothofagus aequilateralis (Nothofagaceae) are two tree species known to dominate the upper canopy of some rainforests on ultramafic substrates in New Caledonia. Structure, diversity and composition of these forests were investigated to better understand the ecological mechanisms leading to their monodominance.

Six Eucalyptus species with diverse seed sizes were sown in vertosol soils in a glasshouse to investigate the influence of sowing depth and three soil-moisture scenarios on seedling emergence. All species had greater emergence when sown superficially but responded differently to the watering treatments. Seed size had little effect.

As parasitic plants, mistletoes are functionally adapted to use host resources for their own growth and reproduction. As a response to mistletoe infection, infected branches produce leaves with morpho-physiological traits that allow higher resource conservation.

BT16148A genetic, demographic and habitat evaluation of an endangered ephemeral species Xerothamnella herbacea from Australia’s Brigalow belt

Alison Shapcott, Robert W. Lamont, Gabriel Conroy, Heather E. James and Yoko Shimizu-Kimura
pp. 38-57

Xerothamnella herbacea is an endangered herbaceous species from the Brigalow Belt impacted by gas pipeline developments. Most populations consisted of less than 100 plants with moderate to low genetic diversity and inbred. Geographic proximity does not predict genetic similarity of populations and diversity is not correlated with population size.

BT16184Structural and phytochemical investigation of the leaves of Ricinus communis

S. Mamoucha, N. Tsafantakis, N. Fokialakis and N. S. Christodoulakis
pp. 58-66

The highly toxic species of Ricinus communis L., was investigated for leaf anatomy, histochemistry and composition of secondary metabolites. Leaves of simple structure with numerous idioblasts and strong positive reaction to histochemical reagents for terpenes, flavonoids, phenolics and alkaloids. Among the secondary metabolites detected is the highly toxic alkaloid ricinine.

BT16157Comparative anatomy of the assimilatory organs of Nepenthes species

Olusegun O. Osunkoya and Nurul Amal Muntassir
pp. 67-79

The relationships between anatomy and physico-chemical properties of plant assimilatory organs (e.g. leaves) have been rarely considered, particularly so in carnivorous plants. The study was on five Nepenthes species, focussing on comparative anatomy of their leaves and conjoint pitchers, as well as on linkages of their tissue dimensions with organ life span and chemistry. The leaf stomata (for photosynthesis) and pitcher-wall glands (for digestive product transfer), despite differences in structure and function, are similar in epidermal origin and in their density–size relationships.

An in vitro protocol for Callerya speciosa regeneration through embryogenesis was developed using the anthers containing late uninucleate stage microspore as the explants. The embryonic callus induced from the anthers developed into embryos and plants. So, a highly efficient system for regenerating C. speciosa using anther culture was established.

BT16188Temporal vegetation changes in a seasonally dry tropical forest enclave in an ecotonal region between savanna and semiarid zones of Brazil

Geovany Heitor Reis, Marcela de Castro Nunes Santos Terra, David Yue Phin Tng, Deborah Mattos Guimaraes Apgaua, Polyanne Aparecida Coelho, Rubens Manoel dos Santos and Yule Roberta Ferreira Nunes
pp. 85-93

Seasonally dry tropical forests (SDTFs) make up a globally important biome for biodiversity conservation, and many such forests occur in poorly studied isolated ecological islands or enclaves. Understanding temporal change in these forests is important for their conservation, and in a SDTF enclave in Minas Gerais, Brazil, we found evidence of shifting vegetation dynamics within these forests. Our results highlight the need for longer term monitoring of enclave SDTF patches.

Online Early

The peer-reviewed and edited version of record published online before inclusion in an issue

Published online 30 January 2017

BT16170Subtropical native grasslands may not require fire, mowing or grazing to maintain native-plant diversity

Roderick J. Fensham, Donald W. Butler, Boris Laffineur, Harry J. MacDermott, John W. Morgan and Jennifer L. Silcock

The grasslands of temperate Australia seem to require disturbance to maintain species diversity. Grasslands in semiarid environments do not seem to have the same requirement. This short-term study suggests that subtropical grasslands on the Darling Downs do not have a requirement for disturbance to maintain species diversity. Drought in the subtropical environment may maintain grasslands in a sufficiently open structure to overcome the requirement for disturbance to maintain diversity of the intertussock flora.

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  1. New handbook for standardised measurement of plant functional traits worldwide

    Australian Journal of Botany 61 (3)
    N. Pérez-Harguindeguy, S. Díaz, E. Garnier, S. Lavorel, H. Poorter, P. Jaureguiberry, M. S. Bret-Harte, W. K. Cornwell, J. M. Craine, D. E. Gurvich, C. Urcelay, E. J. Veneklaas, P. B. Reich, L. Poorter, I. J. Wright, P. Ray, L. Enrico, J. G. Pausas, A. C. de Vos, N. Buchmann, G. Funes, F. Quétier, J. G. Hodgson, K. Thompson, H. D. Morgan, H. ter Steege, L. Sack, B. Blonder, P. Poschlod, M. V. Vaieretti, G. Conti, A. C. Staver, S. Aquino, J. H. C. Cornelissen

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