Redcliffe N. Salaman

Redcliffe Nathan Salaman (12 September 1874 – 12 June 1955) was a British botanist and potato breeder.^[1] His landmark work was the 1949 book on the History and Social influence of the Potato.

Personal life

Bust of Salaman's mother Sarah

Salaman was born in Kensington, London on 12 September 1874 and was the ninth of fifteen children born to his parents Sarah Soloman and Myer Salaman who was a wealthy merchant who traded in ostrich feathers at the height of the plume trade.^[2]

Salaman was married twice, first to Nina Ruth Davis^[3] in 1901 with whom he had six children including a cancer researcher, a doctor, the engineer Raphael Salaman, the artist Ruth Collet^[4] and the singer Esther Salaman.^[5] Nina died in 1925 and in 1926 Salaman met and married Gertrude who survived him.^[1]

Education

Salaman was educated at St Paul's School, London initially studying classics but due to the dull teaching methods he switched to studying science and later became head boy of the Science Side of the school. He obtained a scholarship at Trinity Hall, Cambridge in 1893 and graduated with a first class degree in Natural Sciences in 1896 having studied physiology, zoology and chemistry. He was tutored and advised by the physiologist W. H. Gaskell who later became a good friend of Salaman. He moved to the London Hospital in 1896 to study medicine and remained there until he qualified in 1900.^[1]

Research

In 1903 Salaman was appointed Director of the Pathological Institute at the London Hospital but in 1904 he developed tuberculosis and had to stop practising medicine and spend six months in a Swiss sanitorium.^[2][6] It took him over two years to fully recover from the illness, changing the course of his entire life. He purchased a house in Barley, Hertfordshire and because he could not return to practising medicine began experimenting in the emerging science of genetics under the guidance of his friend William Bateson.^[1][6] After several failed experiments with a range of animals, Salaman decided to experiment with potatoes after seeking advice from his gardener. Later in his career, commenting on his decision to study potatoes Salaman noted that he had "embarked on an enterprise which, after forty years, leaves more questions unsolved than were thought at that time to exist. Whether it was mere luck, or whether the potato and I were destined for life partnership, I do not know, but from that moment my course was set, and I became ever more involved in problems associated directly or indirectly with a plant with which I had no particular affinity, gustatory or romantic".^[6]

Working in his private garden, he initially set out to cross two potato varieties and establish which traits were dominant and recessive in a similar manner to Gregor Mendel's work on peas, but he soon broadened into other areas. In 1908 he decided to include wild potatoes in his experiments and requested that Kew Gardens provide him with Solanum maglia. Kew's stocks had been incorrectly labelled however and Salaman was sent Solanum edinense instead. In 1909 Salaman grew forty self-fertilised crosses of S. edinense and found that seven of them did not succumb to late blight (Phytophthora infestans). Convinced that resistance to late blight existed in wild species he began to study other species and found that Solanum demissum was also resistant to blight. Salaman started to cross S. demissum with domesticated varieties of potato in 1911 to produce high yielding lines that were also resistant to late blight. By 1914 he had successfully created hybrids and in 1926 he remarked that he had produced varieties with "reasonably good economic characteristics which, no matter what their maturity, appeared to be immune to late blight.^[6] Salaman was the first to identify genetic resistance to late blight and S. demissum was still used as a source of resistance in the 1950s.^[1] In The Propitious Esculent, John Reader called Salaman's discovery "an important breakthrough, offering real promise ... that it was possible to breed blight-resistant potato varieties".^[6] In 1987 it was thought that half of the potato varieties cultivated in Europe contained genes from S. demissum.^[7]

In 1910 he published a paper the inheritance of colour in potato in the first issue of the Journal of Genetics.^[8] Later papers in the Journal of Agricultural Science examined male sterility,^[9] methods for estimating yields^[10] and detecting viruses in seed potatoes^[11] and a study of how the size of seed tubers affected the yield and size of tubers of the crop.^[10][12]

His research on potatoes was disrupted by the outbreak of the First World War during which Salaman joined the Royal Army Medical Corps and served in Palestine. Afterwards he was appointed chairman of the potato synonym committee at the National Institute of Agricultural Botany where he was tasked with describing potato varieties and putting an end to the common practice of marketing old and unreliable varieties under new names. His work there culminated in the publication of Potato Varieties in 1926. The same year he persuaded the Ministry of Agriculture to establish the Potato Virus Research Institute in Cambridge of which he remained a director until 1939.^[2] Kenneth Manley Smith was an entomologist at the institute and Frederick Charles Bawden became Salaman's assistant in 1930. Smith and Bawden went on to become renowned plant virologists.^[13] In conjunction with Paul A. Murphy of Dublin a large stock of virus-free potatoes was built up and multiplied in greenhouses, a practice which continued after his death and was adopted in other countries.^[1] His research on viruses lead to him being elected to the Royal Society in 1935.^[2]

Salaman supervised the PhD thesis of Jack Hawkes, who went on to become an authority in the taxonomy of wild potato species and identified sources of resistance to potato cyst nematodes.^[14]

The History and Social Influence of the Potato

Salaman authored The History and Social Influence of the Potato first published in 1949, reprinted in 1970^[15] and revised under the guidance of Jack Hawkes in 1987.^[7] A review of the first edition in the British Journal of Sociology noted that it was an "unusual and vastly interesting book which took nine years to write, and a life-time to prepare" combining genetics, history and archaeology.^[16] The book covers every aspect of the history of the potato with a particular focus on Ireland about which he wrote "in no other country can [potato's] influence on the domestic and economic life of the people be studied to greater advantage".^[15][17]

The historian Eric Hobsbawm referred to the work as "that magnificent monument of scholarship and humanity".^[18] A 1999 paper in Potato Research noted that because of Salaman's "unprecedented" book, we "know more about the impact of the diffusion of potato on the welfare of people, particularly the poor, than about such consequences following the introduction of any other major food plant."^[19]

Further reading

• Daniel Dornhofer: Palestine reclaimed. Rassekunde und Zionismus unter dem Eindruck des Ersten Weltkriegs, in transversal. Zeitschrift für jüdische Studien. № 2, Year 14, University of Graz 2013, ISSN 1607-629X pp. 59 – 75 (in German)

References

External links

• Personal papers of Salaman