Historical Records of Australian Science最新文献

Rupert Jethro Best (1903–91), working alone at the Waite Agricultural Research Institute in Adelaide between 1934 and 1937, was among the first to purify tobacco mosaic virus (TMV) and to propose that it was a complex macromolecule containing protein and another reactive group that was responsible for infectivity of the virus. However, his research was completely overshadowed by that of Wendell Stanley and the duo of Frederick Bawden and Norman (aka Bill) Pirie, working in the United States of America and Great Britain, respectively, to the point where Best is not even mentioned in modern histories of TMV. Many factors have contributed to this lack of recognition for Best. Professor James Prescott, a soil scientist and Best’s supervisor at the Waite Institute, failed to appreciate the significance of his research, leading to critical delays in publication that prevented him from claiming precedence for purifying TMV. When Best’s research was eventually published, it was in Australian journals that were not broadly distributed, resulting in minimal international exposure for his research. The plant virology community within which he worked in Australia was very small and entirely focused on plant disease control, and not concerned with fundamental questions about the composition of viruses. Communication with similarly interested scientists in the Northern Hemisphere was hindered by the great distances involved. In this paper, pioneering research done by Best on TMV is reviewed, and placed in context with that undertaken by Stanley and by Bawden and Pirie, who are best remembered for purifying TMV and characterising its physicochemical properties.

A chance discovery early in 1980 led to a body of work on a virus and a rare species that lasted until the end of the decade. The discovery and characterisation of turnip yellow mosaic virus (TYMV-Cd) infecting one-fifth of the fragmented population of Cardamine robusta at Mt Kosciuszko, New South Wales, revealed a puzzle that remains unresolved. There is no clear explanation as to why there is a population of TYMV here in the Southern Hemisphere whose sequence has only diverged from Northern Hemisphere TYMV by a few percent. Adding to the mystery is the fact that TYMV-Cd only infects one of the rarest and geographically most restricted species in Australia, while it is surrounded by potential hosts known to be infected in the Northern Hemisphere. This article reviews research published on TYMV at Mt Kosciuszko during the 1980s and 1990s. While human agency cannot be ruled out, indications are that TYMV established without human intervention. The work is set in a historical context and highlights some of the changes around how plant virology is done.

In the early decades of British settlement at Sydney Cove in 1788, the struggling colonials tried their hand at growing edible bananas but invariably failed. However, they grew extremely well in the Moreton Bay colony (Brisbane) and over time banana growing became an important agricultural industry there, particularly after the introduction of the Cavendish variety. All was progressing well until a new disease appeared in plantations around Brisbane in the early 1870s. The medical practitioner and naturalist Joseph Bancroft investigated the problem and concluded that a fungus was implicated as the causal agent. In the early 1900s, following serious outbreaks of a disease with similar symptoms in Caribbean countries (where it was called Panama Disease), the American bacteriologist Erwin Frink Smith studied the same disease in Cuba, and named the pathogen Fusarium cubense. Another American scientist, Elmer Walker Brandes, conclusively proved that Fusarium cubense (now called Fusarium oxysporum f.sp. cubense) was the cause of the banana disease. Bancroft’s discovery of the disease now called Fusarium Wilt not only predates other reports of the disease in the Caribbean but also represents the first scientific investigation of a plant disease in Australia.

George Percy Darnell-Smith (1868–1942) was the second plant pathologist appointed to the New South Wales Department of Agriculture. Although he founded the Microbiology Branch (later Plant Pathology Branch) and wrote articles on many plant diseases, his noteworthy contribution was developing the ‘dry pickle’ treatment for common bunt of wheat during the 1910s. Darnell-Smith built on the knowledge gained over the previous 150 years on this disease. Common bunt was the first disease—plant, animal or human—whose cause and disease cycle were found. Mathieu Tillet pioneered scientific study of plant disease with his work on bunt in the 1750s. His microscopic examination showed that minute spores infected wheat seedlings leading to bunt developing in place of wheat seeds. His field experiments found that ‘pickling’ seed with copper solutions and other toxic chemicals prevented the disease. Farmers and researchers refined these wet treatments but they remained tedious to use and reduced seed germination and seedling emergence. Darnell-Smith developed an improved treatment with copper carbonate dust that gave effective control of both seed- and soil-borne inoculum. He patented a simple machine for on-farm use. His treatment had advantages over the wet pickles, being much simpler to apply and not affecting seed germination. After confirmation in the United States of America in the early 1920s, the treatment was rapidly adopted there and in other countries where by 1930 it had reduced bunt from a common disease to one rarely seen. Darnell-Smith said that he chose to work with copper carbonate based on studies by F. C. Clark in the United States of America. However, the German scientist Carl von Tubeuf had described its effectiveness as a dry powder against bunt in 1902. Darnell-Smith lectured in England before moving to Australia so it is possible that he knew of this work. Perhaps the considerable anti-German feeling in Australia during World War I dissuaded Darnell-Smith from acknowledging von Tubeuf.

Ray Martin (1926–2020) was a talented and successful academic and leader, who won numerous awards and made discoveries that changed fundamental knowledge of the sub-discipline of physical inorganic chemistry. His journey over more than 90 years is one that demonstrates that he was one of nature’s gentlemen, who enjoyed sports, arts and people. He was passionate about science and discovery, and through a series of chance events, had a peripatetic life moving from academic positions, to industry, management, a vice chancellorship at Monash University, and then scientific advisor to the Australian Federal Government. Throughout this journey, he always made strong friendships, was an exceptional teacher and outstanding mentor—he was a quiet achiever.

Acacia (the wattles) is the largest genus of plants in Australia and its species occupy almost every habitat in the country. Hard galls on the branches, phyllodes and flower parts of wattle trees were noticed from the very early days of British colonisation, but their causes were unknown. Some insects were believed to be involved, but they were not the only cause of wattle galls. In 1889, the Italian mycologist Pier Andrea Saccardo described the rust fungus Uromyces tepperianus from the galls on Acacia salicina, and later, the Victorian government vegetable pathologist, Daniel McAlpine transferred the species tepperianus to his new genus Uromycladium which also included six new species. A total of 28 valid species of Uromycladium, most endemic to Australia, are currently described. Several species of Uromycladium were somehow introduced into South Africa and countries in southeast Asia where they cause significant losses in Acacia plantations, while others are used as biocontrol agents for invasive Acacia species. Short biographies of two of the early collectors of rust galls, the South Australian naturalist and later entomologist Johann Gottlieb Otto Tepper and the Victorian plant pathologist Charles Clifton Brittlebank are also presented.

Within a few years of the establishment of the convict settlement at Sydney Cove, the potato became one of the staple crops of the population due to its relatively high yield and the prior experience of the convicts and free settlers with growing the crop. In 1894, Henry Tryon described a new disease in southern Queensland that caused rapid wilting of plants, a ring of slightly translucent tissue just below the surface of affected tubers, oozing of a thick, white fluid from the ‘eyes’, and ultimately rotting of the tubers. It soon became known as ‘Tryon’s disease’. He found that a microbe (bacterium) was always associated with affected tubers and stems, provided a very brief description of the bacterial cells and named the microbe Bacillus vascularum solani. A few years later the American scientist Erwin Frink Smith wrote a paper on a new disease (brown rot) of solanaceous plants including the potato and tomato, in which he called the causal agent Pseudomonas solanacearum, now known as Ralstonia solanacearum. Smith dismissed Tryon’s prior claim to the discovery of the disease with some of his comments being personal and scathing. Tryon had the last word, however, cloaking his response in restrained and somewhat convoluted tones.

As the number of livestock increased in the years following English colonisation of Australia in 1788, the need for nutritious fodder, including lucerne (Medicago sativa), grew. One of the first diseases found on lucerne was a leaf spot which was collected in 1879 by George Bancroft, a physician and naturalist, in a suburb of Brisbane. The Queensland Government Botanist Frederick Manson Bailey sent a specimen to the prominent English mycologists Miles Joseph Berkeley and Christopher Edmund Broome who in 1883 formally described and named the fungus Sphaerella destructiva. That fungus is now known as Pseudopeziza medicaginis, the causal agent of common leaf spot of lucerne. It was one of over 300 fungi that were included in a 1880 paper co-written by the Reverend Julian Tenison-Woods and Frederick Bailey. At that time almost all of these fungi which had been collected in Australia were identified by overseas mycologists, particularly Berkeley and Broome. It can be argued that their 1880 paper was the first significant one published in Australia which focussed on fungi. Just a decade or so later Australian scientists, in particular Daniel McAlpine, were describing new fungal taxa on their own.

The earliest record of pineapple plants being grown around Sydney in the British colony of New South Wales was that of Governor King in 1803. However, the climate of a new northern settlement at Moreton Bay (later Brisbane) soon proved to be far more conducive to growing the fruit. Pineapples prospered for over 50 years around Brisbane until a mysterious disease appeared in the late 1890s. In April 1891, Professor Edward Shelton, an American who had been appointed as the Queensland government’s first Instructor in Agriculture, was the first scientist to inspect the affected crops and concluded that the disease was caused by a fungus. In the following year, Shelton, Henry Tryon (then assistant curator at the Queensland Museum) and others again inspected the diseased pineapple crops. Tryon described the symptoms in detail as well as spores which were composed of two rounded elements, each having a double contour (chlamydospores). There is no doubt that the disease was caused by the oomycete Phytophthora cinnamomi that was described decades later. In 1897, Shelton was passionate about agricultural education and was appointed as the first principal of the Gatton Agricultural College, but his disciplining of some students of the college led to his forced resignation just 18 months later.

Professor William (Bill) Budd was a founding figure in Australian glaciology, and the first glaciology program leader of the Australian Antarctic Division (Fig. 1). Bill worked on an enormous range of glaciological and meteorological problems covering numerical modelling of ice sheets and glaciers, including surging glaciers; ice mechanics; ice crystallography; ice core paleoclimatic studies; relationships between sea ice and climate; and katabatic wind and snow drift studies. Bill introduced and led studies of ice sheet mass budget, ice rheology, ice sheet thermodynamics, iceberg distribution and movement, drifting snow, sea ice and climate interactions and much more. He initiated Australian ice core drilling (initially for study of ice dynamics and later for palaeoclimate research), radio echo sounding of ice thickness and satellite remote sensing of ice. Much of what Bill Budd initiated more than fifty years ago remains core to the present-day Australian Antarctic glaciological research program.