Venom Alkaloid Chemistry of Australian Species of theMonomorium rothsteiniComplex, with Particular Reference to Taxonomic Implications

2009 ◽  
Vol 6 (7) ◽  
pp. 1034-1041 ◽  
Author(s):  
Tappey H. Jones ◽  
Alan N. Andersen ◽  
Joshua C. Kenny
Keyword(s):  
Australian Species ◽  
Taxonomic Implications

Occurrence of the Unusual Amino Compound S-Methyl Cysteine in Australian Members of the Restionaceae - Biological and Taxonomic Significance

1995 ◽  
Vol 43 (1) ◽  
pp. 73 ◽  
Author(s):  
JS Pate ◽  
E Rasins ◽  
PP Thumfort ◽  
CJ Mcchesney ◽  
KA Meney
Keyword(s):  
New Genus ◽  
Xylem Sap ◽  
Amino Compound ◽  
Taxonomic Significance ◽  
Protein Amino Acid ◽  
Total N ◽  
Australian Species ◽  
Ethanolic Extracts ◽  
Taxonomic Implications

The non-protein amino acid S-methyl cysteine (CH3-S-CH2> CH (NH2) COOH) was identified and assayed by HPLC and GC/MS analyses of ethanolic extracts of freshly-collected culms and rhizomes of Australian species of Restionaceae. Of 140 species examined, only 20 proved positive and two probably positive for the compound. Amounts in culms and rhizomes of these positive species varied from a trace to 74% of the ninhydrin-positive soluble amino N or from a trace to 33 mu mol per g fwt of tissue. Certain species showed substantial Variations in amounts of S-methyl cysteine between sites and seasons. Xylem bleeding sap was collected and analysed from 32 species. The nine species whose xylem sap was positive for S-methyl cysteine (0.5-23.5% of xylem total amino N) also rated positive in culms and rhizomes. Investment of N in S-methyl cysteine ranged from 0.1 to 6.3% of culm total N or 0.2-6.7% of rhizome total N. A possible role of the compound in protection against herbivory was examined. Positive species came from only three of the 19 currently recognized genera, Lepyrodia (16 positive, two possibly positive), Restio (one positive species) Loxocarya, (one positive species) and a further three as yet unnamed species. Under a proposed revision (B. Briggs and L. Johnson, pers. comm.), the positive species of Restio and the three unnamed species would be ascribed to a redefined genus (Loxocarya sens. orig.), thus restricting all species containing S-methyl cysteine to this new genus and Lepyrodia. The latter genus is changed under the proposed classification by transfer of certain species to the genus Sporadanthus. All six species proposed for such transfer lack the compound. Taxonomic implications of the findings are discussed.

Oil glands and ducts in Eucalyptus L'Hérit. I. The phloem and the pith

1969 ◽  
Vol 17 (3) ◽  
pp. 471 ◽  
Author(s):  
SGM Carr ◽  
DJ Carr
Keyword(s):  
General Rule ◽  
Great Variability ◽  
Root Bark ◽  
Secondary Phloem ◽  
Oil Glands ◽  
Vegetative Tissues ◽  
Australian Species ◽  
Full Development ◽  
Taxonomic Implications ◽  
Western Australian

Most (94 %) of the known eucalypts have been examined for the presence of oil glands in vegetative tissues other than the mesophyll and the primary cortex of the stem. In certain species oil glands occur in the pith and, in a few cases, in the midrib as well. In others (series Corymbosae) oil ducts occur in the pith and in the midrib. In others again (Macrantherae Normales) glands are formed in the phloem of both root and shoot. As a general rule, species which have glands or ducts in the pith do not have glands in the phloem, and vice versa. The only exceptions are provided by nine species of the "eudesmioid complex" (defined below). Of eucalypt species, 58 % have no glands in either the pith or the phloem. It is believed that glands never develop in the primary cortex of the root but always in that of the shoot. The occurrence of glands in the pith or the phloem is constant in many species but others show great variability in the numbers of glands present. Possible explanations for the observed variability are suggested and further lines of investigation are indicated. The age of the tree at which glands first appear in the bark varies widely from one species to another and less widely within species; glands appear precociously in root bark. The age of the secondary phloem itself at which it produces glands also shows wide variations between species. In the Corymbosae the full development of the oil duct system is closely correlated with the ontogenetic juvenile-adult foliage change. The taxonomic implications of the presence or absence of glands in the pith and phloem are discussed. The characters have proved useful for field and herbarium identification. The presence or absence of pith glands is particularly valuable in dealing with Western Australian species.

Anatomy and ultrastructure of haustoria in selected West Australian parasitic angiosperms

1990 ◽  
Vol 48 (3) ◽  
pp. 690-691
Author(s):  
John Kuo ◽  
John S. Pate
Keyword(s):  
Parasitic Plants ◽  
The Other ◽  
Nutrient Transfer ◽  
Direct Solution ◽  
Tracheary Elements ◽  
Solute Transfer ◽  
Glycol Methacrylate ◽  
Australian Species ◽  
Anatomy And Ultrastructure ◽  
Solution Transfer

Our understanding of nutrient transfer between host and flowering parasitic plants is usually based mainly on physiological concepts, with little information on haustorial structure related to function. The aim of this paper is to study the haustorial interface and possible pathways of water and solute transfer between a number of host and parasites.Haustorial tissues were fixed in glutaraldehyde and embedded in glycol methacrylate (LM), or fixed in glutaraldehyde then OsO4 and embedded in Spurr’s resin (TEM).Our study shows that lumen to lumen continuity occurs between tracheary elements of a host and four S.W. Australian species of aerial mistletoes (Fig. 1), and some root hemiparasites (Exocarpos spp. and Anthobolus foveolatus) (Fig. 2). On the other hand, haustorial interfaces of the root hemiparasites Olax phyllanthi and Santalum (2 species) are comprised mainly of parenchyma, as opposed to terminating tracheads or vessels, implying that direct solution transfer between partners via vessels or tracheary elements may be limited (Fig. 3).

Rediagnoses of the Asian genera Xylaplothrips and Mesandrothrips (Thysanoptera, Phlaeothripinae, Haplothripini), with keys to Australian species

Zootaxa ◽  
2019 ◽  
Vol 4613 (2) ◽  
pp. 327
Author(s):  
LAURENCE A. MOUND ◽  
DESLEY J. TREE
Keyword(s):  
Southeast Asia ◽  
Type Species ◽  
New Combination ◽  
New Combinations ◽  
Single Female ◽  
Australian Species ◽  
Incertae Sedis

The genus Xylaplothrips is re-diagnosed, 11 species are listed as appropriately included in this genus of which three are new combinations from Haplothrips (X. acaciae; X. collyerae; X. gahniae). A further six species are listed as incertae sedis within Xylaplothrips and a key is provided to the four species of this genus known from Australia including X. anarsius sp.n. The genus Mesandrothrips is recalled from synonymy with Xylaplothrips, and a list is provided of 20 appropriately included species of which 14 are new combinations from Xylaplothrips (M. caliginosus; M. clavipes; M. darci; M. dubius; M. emineus; M. flavitibia; M. flavus; M. inquilinus; M. montanus; M. pictipes; M. pusillus; M. reedi; M. subterraneus; M. tener), and one is a new combination from Haplothrips (M. inquinatus). A key is provided to 10 species of this genus known from Australia, including three species transferred from Haplothrips, together with M. austrosteensia sp.n., M. googongi sp.n., M. kurandae sp.n., M. lamingtoni sp.n. and M. oleariae sp.n. The type species, M. inquilinus, is widespread across Southeast Asia as an invader of thrips galls, and Haplothrips darci Girault based on a single female from Queensland is considered closely related. 

Nomenclatural corrections to Australian species of Cricotopus (Wulp) (Diptera; Chironomidae)

Zootaxa ◽  
2015 ◽  
Vol 3980 (2) ◽  
pp. 298 ◽  
Author(s):  
PETER S. CRANSTON ◽  
MATT N. KROSCH
Keyword(s):  
Australian Species

Lecanactis (Roccellaceae) in Tasmania, with the description of a new saxicolous species and a revised key for the genus in Australia

2021 ◽  
Vol 53 (1) ◽  
pp. 95-101
Author(s):  
Gintaras Kantvilas
Keyword(s):  
New Zealand ◽  
New South ◽  
First Record ◽  
New Taxon ◽  
European Species ◽  
Australian Species ◽  
South Wales ◽  
Distribution And Ecology ◽  
Tasmanian Endemic ◽  
First Time

AbstractThe lichen genus Lecanactis Körb. in Tasmania comprises six species: L. abietina (Ach.) Körb., which is widespread and pan-temperate; L. latispora Egea & Torrente and L. neozelandica Egea & Torrente, both shared with New Zealand and with the former recorded here from the Auckland Islands for the first time; L. mollis (Stirt.) Frisch & Ertz, shared with Victoria and New Zealand; L. aff. dilleniana (Ach.) Körb., a European species recorded provisionally for Tasmania on the basis of several sterile collections; L. scopulicola Kantvilas, which is described here as new to science and apparently a Tasmanian endemic. This new taxon occurs in rocky underhangs and is characterized by a thick, leprose thallus containing schizopeltic acid, and 3-septate ascospores, 19–30 × 4.5–6 μm. Short descriptions and a discussion of distribution and ecology are given for all species. A key for all 11 Australian species of the genus is provided, including L. subfarinosa (C. Knight) Hellb. and L. tibelliana Egea & Torrente, which are recorded for Australia for the first time, and L. platygraphoides (Müll.Arg.) Zahlbr., a first record for New South Wales. Lecanactis spermatospora Egea & Torrente and L. sulphurea Egea & Torrente are also included.

Fruit morphoanatomy of Astronium Jacq. and Myracrodruon Allemão (Anacardiaceae): taxonomic implications and development of the calycinal wings

2021 ◽  
Author(s):  
Elimar Alves de Lima ◽  
Elisabeth Dantas Tölke ◽  
Cíntia Luíza da Silva-luz ◽  
Diego Demarco ◽  
Sandra Maria Carmello-Guerreiro
Keyword(s):  
Taxonomic Implications
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