Thomas Andrew Knight |
 |
Thomas Andrew Knight -
Horticulturalist
The establishment of the Royal
Society of London in 1660, devoted to "improving natural knowledge," received
and published a number of papers on botany and in 1795 published a contribution
by Knight on the grafting of trees in 1795. In 1804, Knight wrote to Sir Joseph
Banks, the great naturalist who sailed with Captain Cook, as
follows:
SoHo Square, March 29,
1894
My
Dear Sir:
It having occurred to some of us here, that a
Horticultural Society might be formed, upon a principle not very dissimilar from
that of the numerous Agricultural Societies, which, if they have done no other
service, have certainly wakened a taste for agriculture, and guided the
judgements of those who wished to encourage it; two meetings have been held in
order to commence the establishment, the proceedings of which I enclose to you.
You will see that I have taken the liberty of naming you as an original
member.
The Horticultural Society was formed in 1804 with Lord
Dartmouth as president and John Wedgewood as secretary, with the first
Transactions published in 1807. A Royal Charter was granted in 1809 and Knight
assumed the presidency in 1811.
Thomas Andrew Knight, president of the
London Horticulture Society (later Royal Horticultural Society) from 1811-1838,
can be considered the father of horticultural science. He was the first of the
18th century naturalists to devote himself to the emerging science of
horticulture, having an interest both in basic issues in botany as well as
applications in practical horticulture. He was both an observer/naturalist and
an experimentalist. His interests were wide ranging and embraced the disciplines
that we now call plant physiology, structural biology, and genetics. Knight
investigated physiological problems such as the ascent and descent of sap,
gravitational biology, tropisms, and the nature of the cambium. He was
interested in relating morphology and anatomy to development and function. His
studies on the effects of pollen in the garden pea on seed characters presaged
the work Gregor Mendel carried out 40 years later. He describes dominance and
segregation, although he fails to make the brilliant leap of Mendel in relating
phenotypic characters to the factors we now know as genes. He reports
observations on the genetics of animal behavior, a field not truly explored
until the end of the 20th century.
Knight's true love, however, was
horticulture. In this field he investigated controlled environmental culture
(greenhouse construction and vegetable forcing), plant nutrition and
fertilization, culture of fruits and vegetables, pest control, and plant
breeding. He was an early proponent of the development of plant improvement
through cross breeding and selection, and he literally initiated the field of
fruit breeding. He released a number of improved cultivars of both fruits
(apple, cherry, strawberry, red currant, plum, nectarine, and pear) and
vegetables (pea, cabbage, and potato). He was interested in developing improved
cultural methods to enhance earliness and yield, the effect of rootstocks, the
influence of girdling, plant hardiness, and the causes and control of disease.
Clearly ahead of his time, he was the first to investigate the influence of
electricity on plants. He contributed nearly a hundred scientific papers on a
wide range of topics, with the bulk on horticultural science. Unfortunately, his
notes are lost, so we know little of his methods of collecting data other than
what is detailed in his papers. It is clear he appreciated the value of having
appropriate controls, the value of replication, and the verification of data. He
investigated such horticultural species as vegetables (bean, broadbean, cabbage,
carrot, celery, melons, mint, mushrooms, onion, parsnip, pea, potato), fruits
(avocado, apple, cherry, grape, lemon, mamey, mango, orange, nectarine, peach,
pear, pineapple, plum, quince, strawberry, walnut) and ornamentals (amaryllis,
camellia, fern, ivy, lily, palm, rose). His early experimental study of the
effect of gravity on seedling growth in bean has become the cornerstone of
modern gravitational biology. His 1806 paper entitled "On the direction of the
radicle and germen during the vegetation of seeds," was selected for inclusion
in the volume Classic Papers in Horticultural Science (1989). His study on the
phototropism of tendrils has been incorporated in textbooks of plant physiology
without attribution. A renaissance investigator, he is honored here for the
breadth of his interests and his devotion to the science and the practical arts
of horticulture.
Devotees of the 19th century British author Anthony
Trollope will recognize Knight as the quintessential 19th century country
gentleman, landowner, hunter, and scientific dilettante, someone with the
character of Plantagenet Palliser - moral, personally kind and gentle, but
clearly a conservative of the old school. Second son of a clergyman, he
inherited wealth, a castle, and a 10,000 acre estate at the age of 29 after the
death of his renowned brother Payne Knight, author, art collector and member of
parliament. This enabled him to intensively pursued his passion in plant
physiology and experimental horticulture.
He was happily married for 46
years to Frances Felton. The life of his only son was cut short by a hunting
accident; Frances, his eldest daughter, became a collaborator in his fruit
breeding research. Knight was a vital part of the scientific establishment of
his time and had extensive correspondence with Sir Joseph Banks and Humphries
Davy, as well as a number of foreign naturalists.
Thomas Andrew Knight, a
forerunner of the great American Horticulturist Liberty Hyde Bailey (1860-1954),
is remembered today chiefly through the Knightian medal, still presented by the
Royal Society, and by a genus of the Proteaceae that bears the name Knightia in
his honor.
|
|