Haraldiophyllum erosum comb. nov. (Delesseriaceae, Rhodophyta) from Southern and Western Australia

1996 ◽  
Vol 9 (1) ◽  
pp. 61 ◽  
Author(s):  
AJK Millar ◽  
JM Huisman
Keyword(s):  
Western Australia ◽  
Supporting Cell ◽  
Red Alga ◽  
The Other ◽  
Sterile Cell ◽  
Cell Groups ◽  
Carpogonial Branch ◽  
Fusion Cell ◽  
Cover Cell

Nitophyllum erosum Harvey (Delesseriaceae, Rhodophyta) is a branched, monostromatic red alga that is readily recognised by its distinctive fringe of branched, multicellular processes. It has been considered to be a member of the genus Myriograrnrne Kylin, since it was thought to have carposporangia borne in short chains, a feature partially diagnostic for that genus. Recent collections of female and cystocarpic material have allowed us to ascertain the structure of the procarp, a feature important in generic placement. The procarp includes two periaxial cells, of which one acts as a cover cell while the other functions as the supporting cell, ultimately bearing two sterile cell groups and a four-celled carpogonial branch. In addition, the carposporophyte includes a distinctive fusion cell that incorporates gametophytic cells from the floor of the cystocarpic cavity, and the carposporangia are single and terminal on gonimoblast filaments. This combination of characters is diagnostic of the genus Haraldiophyllurn, a genus to which we transfer this species as Haraldiophyllum erosurn (Harvey) Millar & Huisman. comb. nov.

Étude comparée de la reproduction de Phymatolithon calcareum (Pallas) Adey & McKibbin et Lithothamnion corallioides (P. & H. Crouan) P. & H. Crouan (Corallinales, Rhodophyta), et reconsidérations sur la définition des genres

1998 ◽  
Vol 76 (8) ◽  
pp. 1433-1445 ◽  
Author(s):  
M L Mendoza ◽  
J Cabioch
Keyword(s):  
Sexual Reproduction ◽  
Type Species ◽  
Supporting Cell ◽  
Simple Type ◽  
Auxiliary Cell ◽  
Carpogonial Branch ◽  
Juvenile Stages ◽  
Fusion Cell ◽  
Main Components ◽  
First Time

The two CorallinalesPhymatolithon calcareum and Lithothamnion corallioides are the main components of European maerl communities. A large majority of the thalli are free-living branches borne on juvenile crusts that are rarely found. A detailed investigation of these juvenile stages has allowed the discovery of their reproductive features. Sexual reproduction of P. calcareum, the type-species of the genus, is described here for the first time and thus gives fundamental data for the generic definition. On the floor of the female conceptacle, a set of carpogonial branches is formed. Each fertilized carpogonium then fuses with the supporting cell of the carpogonial branch, which is also its auxiliary cell. A small fusion cell is thus formed, which produces upwards a small gonimoblast reduced to a short chain of carposporangia. In a mature conceptacle, the surface of the fertile floor thus appears entirely covered with small gonimoblasts. In the male conceptacle, mature spermatangia produced on the floor are typically dendroid; those produced on the walls are of a more simple type. The organization of the asexual conceptacle is briefly reviewed. The reproduction of L. corallioides is also newly described and compared with that previously reported for L. muelleri, the type-species of the genus.Key words: Corallinales, Phymatolithon, Lithothamnion, sexual reproduction, generic definition.

Studies of Marine algae in the lesser-known families of the Gigartinales (Rhodophyta). II. The Dicranemaceae

1977 ◽  
Vol 25 (2) ◽  
pp. 219 ◽  
Author(s):  
GT Kraft
Keyword(s):  
Marine Algae ◽  
Supporting Cell ◽  
Branch System ◽  
Auxiliary Cell ◽  
Cell Position ◽  
The Family ◽  
Red Algal ◽  
Carpogonial Branch ◽  
Advanced Stages ◽  
Fusion Cell

The red algal family Dicranemaceae (Gigartinales) has been studied with regard to its vegetative and reproductive morphology, The group is composed of two Dicranema species (D. revolutum (C. Ag.) J. Ag. and D. cincinnalis sp, nov.), Peltasta australis J. Ag., Reptataxis rhizophora (Lucas) gen. et comb. nov., and Tylotus obtusatus (Sond.) J . Ag. All except Reptataxis, from Lord Howe I., are endemic to southern Australia. The last three genera are newly added to the family, which is redefined to embrace their early gonimoblast similarities to Dicranema. The species are all multiaxial, zonately tetrasporangiate and monoecious. Dicranema, Peltasta and Reptataxis have broad, cellular cortexes and filamentous medullas, while Tylotus is pseudoparenchymatous throughout. Tetrasporangia are nemathecial in Dieranem, Reptataxis and Tylotus, but scattered in Peltasta. Spermatangia in Dicranema are formed in deeply buried catenate clusters, and are similarly derived but non-catenate in the other genera. The species are all monocarpogonial, and only Tylotus is procarpic. In none of the genera are sterile cells associated with carpogonial branches. In Tylotus the supporting cell of the carpogonial branch fuses with the presumably fertilized carpogonium and becomes the diploidized auxiliary cell. In Dicranema, Peltasta and Reptataxis, 2- or 3-celled carpogonial branches are directed to the thallus surface and presumably fertilized carpogonia fuse with an auxiliary cell not necessarily on the same cortical branch system as the supporting cell. Diploidized auxiliary cells in all four genera form small, irregular fusion cells and emit multiple, filamentous gonimoblasts. Gonimoblast growth is mostly thallus-inward in Dicranema, initially radial in Peltasta and Reptataxis, and lateral and outward in Tylotus and advanced stages of Peltasta and Reptataxis. In Dicranema, Peltasta and Reptataxis an extensive placenta of mixed and connected gonimoblast and vegetative cells forms between the fusion cell and the peripheral carpospore-producing layers. In Tylotus vegetative/gonimoblast cell connections occur mainly at the floor of the cystocarp. Carposporangia develop singly on elongate penultimate gonimoblasts in Dicranema and Tylotus, but form chains in Peltasta and Reptataxis. Cystocarps in all the genera are surrounded by thick ostiolate pericarps. The genera of the Dicranemaceae are distinct from one another on frond and holdfast habits, vegetative structure, carpogonial branch shape, auxiliary cell position, gonimoblast orientation, carposporangial size, and mature cystocarp location and cross section. None of the four genera seem obviously derived from or particularly closely related to any others outside the family, although both Peltasta and Reptataxis show some features susesting possible links to the Sarcodiaceae.

John Norman Collie 1859-1942

1943 ◽  
Vol 4 (12) ◽  
pp. 329-356 ◽  
Keyword(s):  
High School ◽  
Western Australia ◽  
The Other ◽  
Napoleonic Wars ◽  
Royal Navy ◽  
The Third ◽  
University College ◽  
University College London ◽  
The One ◽  
The Town

Born on 10 September 1859, John Norman Collie was the second son of John Collie and the grandson of George Collie, an Aberdeen merchant, whose ancestors came from Ireland in the days of Cromwell. George Collie married Margaret Roy, the daughter of Captain Roy McGregor. George Collie’s brother was a surgeon in the Royal Navy during the Napoleonic wars. He served on the warships which annexed Western Australia. He discovered the Collie river, and the town of Collie, also named after him, celebrated its centenary in 1935 when the Premier of Western Australia unveiled a statue to him. Dr Collie wrote to his brother George a number of letters in which he described his experiences in Western Australia, and these letters, as the result of negotiations by Professor N. T. M. Wilsmore, himself a native of Perth, W. A.,and a student and later a lecturer at University College, London, are now in the archives of the cities of Perth and Canberra. John Collie married Selina Mary, the third daughter of Henry Winkworth, the son of the Rev. Henry Winkworth who was the vicar of St Saviour’s, Southwark. Henry Winkwrorth married Miss Dickenson of Kentish origin and had by her four daughters, Catherine, Susanna, Selina Mary and Alice, and two sons. Catherine was the author of Lyra Germanica , and Susanna wrote a life of Catherine. Susanna worked for many years in Clifton and Bristol on the provision of model dwellings for workpeople and was in fact one of the pioneers in this field. John Collie and his wife had four sons, the two eldest being Henry and John Norman, and one daughter, Susan Margaret, who was their third child and for many years Head of the Bedford High School for Girls. The foregoing epitome of John Norman’s ancestry is of considerable interest. On the one side he had Highland blood in him and from the other he inherited the Winkworth personality which revealed itself in so many members of that family. To this may be attributed the outstanding personality with which he was unquestionably endowed.

Residual value of molybdenum trioxide for clover production on an acidic sandy podzol

2002 ◽  
Vol 42 (5) ◽  
pp. 565 ◽  
Author(s):  
R. F. Brennan
Keyword(s):  
Western Australia ◽  
Molybdenum Trioxide ◽  
Maximum Yield ◽  
Soil Surface ◽  
Trifolium Subterraneum ◽  
The Other ◽  
Residual Value ◽  
Yield Plateau ◽  
Mo Content

The residual value (RV) of molybdenum (Mo) for clover (Trifolium subterraneum L.) production was measured for an acidic sand when the fertiliser was spread over the soil surface (topdressed). The RV of Mo, as molybdenum trioxide, the most widely used Mo fertiliser in Western Australia, was measured using yield of dry herbage (DM), Mo concentration of DM, and Mo content of DM (yield of DM multiplied by the Mo concentration of DM). The RV of Mo fertiliser was measured in 1993 for fertiliser Mo applied once only to plots not treated with Mo before, either in 1993 (current Mo) or 1-10 years previously (previous Mo). Relative to the nil-Mo treatment, additions of Mo fertiliser increased DM yield by about 1.20 t/ha (20% DM increase) in October. When 80 or 320 g Mo/ha was applied, all yields were on the maximum yield plateau except for Mo applied 10 years previously. The yield for the 80 g Mo/ha treatment applied 10 years earlier decreased by about 15% relative to the other current and previous Mo treatments. However, as measured using Mo concentration and Mo content in DM, there was a continuous decline in the effectiveness of previous Mo relative to current Mo the longer the previous Mo was in contact with the soil. The decrease in RV was about the same as measured using Mo concentration or content in tissue. Molybdenum applied 5 years previously was about one-third as effective as current Mo for Mo content or Mo concentration of DM.

Seed production and persistence of Carnamah and other early strains of Trifolium subterraneum in the wheatbelt of Western Australia

1967 ◽  
Vol 7 (24) ◽  
pp. 25 ◽  
Author(s):  
GB Taylor ◽  
RC Rossiter
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Western Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Growing Season ◽  
Early Flowering ◽  
The Other ◽  
Factors Affecting ◽  
Seed Yields

Seed production and persistence of the Carnamah, Northam A, Dwalganup, and Geraldton strains of subterranean clover (Trifolium subterraneum L.) were examined in undefoliated swards in the wheatbelt of Western Australia. The early flowering characteristic of Carnamah was not always associated with higher seed yields. Only when there was a well-defined, early finish to the growing season, or when flowering was very much earlier in Carnamah (viz., following an early 'break' to the season), did this strain clearly outyield both Northam A and Geraldton. The seed yield of Dwalganup was generally inferior to that of the other strains. Factors affecting regeneration are discussed. Under low rainfall conditions, poorer germination-regulation of Carnamah, compared with Geraldton and Northam A, would be expected to result in poorer persistence unless offset by higher seed yields in the Carnamah strain.

Yield, plant characteristics, and relative tolerance to bunch loss of four banana varieties (Musa AAA Group, Cavendish subgroup) in the semi-arid subtropics of Western Australia

1992 ◽  
Vol 32 (2) ◽  
pp. 237
Author(s):  
TR Hill ◽  
ARJ Bissell ◽  
JR Burt
Keyword(s):  
Western Australia ◽  
New Guinea ◽  
The Other ◽  
Marketable Yield ◽  
Relative Tolerance ◽  
Plant Characteristics ◽  
The Mean ◽  
Semi Arid

The yield, plant characteristics (pseudostem height and girth), and relative tolerance to bunch loss of 4 banana varieties (Musa AAA Group, Cavendish subgroup) were studied over 2 crops in the semi-arid subtropics at Carnarvon, Western Australia. The varieties were New Guinea Cavendish, Chinese Cavendish, Hsien.Jen Chiao, and the most widely grown Australian variety, Williams. The marketable yield of Williams was higher (P<0.05) than the mean of the other varieties in the parent crop (70.2 v. 50.7 t/ha) and ratoon 1 crop (65.8 v. 34.4 t/ha). This was the result of lower (P<0.05) bunch loss, about 41% less over the 2 crops, than for the other varieties. Resistance to bunch loss-pseudostem breakage and bunch peduncle snap was not associated with the shorter varieties (New Guinea Cavendish and Chinese Cavendish), but resistance to choke throat was associated with the taller varieties (Williams and Hsien Jen Chiao).

Effects of the coastal brown ant Pheidole megacephala (Fabricius), on the ant fauna of the Perth metropolitan region, Western Australia

2000 ◽  
Vol 6 (1) ◽  
pp. 81 ◽  
Author(s):  
J. E. May ◽  
B. E. Heterick
Keyword(s):  
Western Australia ◽  
Abundant Species ◽  
Pitfall Trap ◽  
The Other ◽  
Metropolitan Region ◽  
Pheidole Megacephala ◽  
Apparent Displacement ◽  
Significant Difference ◽  
Almost All

This paper reports on the apparent displacement of native and exotic ants from gardens in the Perth Metropolitan region by the coastal brown ant (Pheidole megacephala (Fabricius)). Twelve gardens were sampled, four with P. megacephala present, and eight (the controls) where the ant was judged to be absent. Eight out of the 26 ant species recorded (including the coastal brown ant) were introduced. Ninety-two per cent of pitfall trap contents comprised the four most abundant species: P. megacephala, lridomyrmex chasei (Forel), Tetramorium simillimum (F. Smith) and Paratrechina ?obscura (Mayr). Three of the four P. megacephala-dominated gardens were depauperate of almost all other ant species. The fourth P. megacephala-infested garden had a relatively small number of coastal brown ants (104), and the highest number of ant species was found in that garden. The removal of this outlier garden left an average range of one to three species for the other three P. megacephala-infested gardens. Control gardens had between five and 12 ant species. Total ant abundance ranged from an average of 1 027 per P. megacephala-infested garden (increasing to 1 171 if the outlier garden is removed) to 146 at control gardens. There was a significant difference both in ant richness and ant abundance between the controls and P. megacephala-infested gardens (P < 0.05). This remained the case when figures for coastal brown ants were excluded from calculations.

scholarly journals The distribution of antibodies to HHV-6 compared with other herpesviruses in young children

1990 ◽  
Vol 105 (3) ◽  
pp. 603-607 ◽  
Author(s):  
T. J. Farr ◽  
G. B. Harnett ◽  
G. R. Pietroboni ◽  
M. R. Bucens
Keyword(s):  
Young Children ◽  
Cord Blood ◽  
Western Australia ◽  
Age Groups ◽  
The Other ◽  
Early Age ◽  
Rapid Rise ◽  
Igg Antibodies ◽  
Blood Samples ◽  
Igm Antibodies

SUMMARYSera from 141 infants aged 0–12 months were examined for IgG antibodies to HHV-6, HSV, CMV, VZV and EBV and for HHV-6 specific IgM. Following the decline in maternal antibody, antibody to HHV-6 was found to rise by 5–6 months and approached the level found in adults by 11–12 months. In contrast the antibody rates for the other herpesviruses were much slower to rise, especially in the case of CMV and EBV. HHV-6 IgM antibodies were detected mainly in age groups showing a rapid rise in antibody to HHV-6. HHV-6-IgM was not detected in 235 cord blood samples. The data suggest that HHV-6 infection is acquired horizontally, at a very early age in Western Australia.

I.—The Physiographic Significance of Laterite in Western Australia

1918 ◽  
Vol 5 (9) ◽  
pp. 385-393 ◽  
Author(s):  
W. G. Woolnough
Keyword(s):  
Western Australia ◽  
The Other ◽  
Rock Weathering ◽  
The Earth ◽  
The One ◽  
Soluble Material

During the last six or seven years a series of valuable papers bearing on the origin of laterite has appeared in the Geological Magazine. The conclusions arrived at have been somewhat diverse and contradictory. Dr. Fermor, on the one hand, regarded the laterites of India as residual in character, and believed that they represented the insoluble residues left in the process of rock weathering after the soluble constituents had been removed in solution. Mr. Simpson, at the other extreme, suggested that they represented the soluble material, leached out of the subjacent rocks during weathering under peculiar conditions, and deposited as a chemically-formed rock by precipitation at the surface of the earth.

An evaluation of barley accessions for adaptation to the cereal growing regions of Western Australia, based on time to ear emergence

1994 ◽  
Vol 45 (1) ◽  
pp. 75 ◽  
Author(s):  
KJ Young ◽  
GA Elliott
Keyword(s):  
Cluster Analysis ◽  
Western Australia ◽  
The Other ◽  
Optimum Time ◽  
High Rainfall ◽  
Sowing Dates ◽  
Wide Range ◽  
Mean Time ◽  
Rainfall Region ◽  
Western Australian

Ear emergence was measured on a wide range of barley accessions for a number of sowing dates in contrasting environments of the Western Australian cereal-growing regions to determine suitable types for (i) early sowing in the low (<400 mm per annum) regions and (ii) barley production in the high rainfall (>450 mm per annum) regions. Accessions were classified into nine groups via cluster analysis using the time to ear emergence at four sites and a range of sowing dates. Australian cultivars were members of the three groups with the shortest mean time to ear emergence, and, on the basis of an optimum time to ear emergence at each site, were shown to be well adapted to a wide range of sowing times and sites. Members of only one other group showed an acceptable level of adaptation across sites and sowing dates, members of the other five groups being suited to early or very early sowings in the high rainfall region only.

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