Timeline of Plant Tissue Culture and Selected Molecular Biology Events
Tens of
People wandered the earth, collecting and eating only what they found
thousands growing in nature. By about 8,000 BC, however, the first farmers decided
of years
to stay in one place and grow certain plants as crops — creating
ago...
agriculture and civilization, in that order
Thousands People first learn to use bacteria to make new and different foods, and to
of years
employ yeast and fermentation processes to make wine, beer and
ago
leavened bread
Prior to
Plants used for food; Plants domesticated, selectively bred for desired
1750
characteristics
1750-1850 Increased cultivation of leguminous crops and crop rotations to increase
yield and land use
1838
Cell theory, suggesting totipotentiality of cells. Schleiden M. J., Arch.
Anat., Physiol. U. wiss. Med. (J. Muller), 1838: 137-176; Schwann T.,
1850's
1859
1861
1865
1869
1882
1900
1902
1904
1909
W. Engelman, No. 176 (1910).
Horse drawn harrows, seed drills, corn planters, horse hoes, 2-row
cultivators, hay mowers, and rakes Industrially processed animal feed and
inorganic fertilizer
Charles Darwin hypothesizes that animal and plant populations adapt over
time to best fit the environment
Louis Pasteur defines the role of micro-organisms and establishes the
science of microbiology
Gregor Mendel investigates how traits are passed from generation to
generation - called them factors
Johann Meischer isolates DNA from the nuclei of white blood cells
Plants synthesize organ-forming substances that are polarly
distributed. Sachs J., Arch. Bot. Inst. Wurzburg, 2: 453 & 689. A
European botanists use Mendel's Law to improve plant species. This
is the beginning of classic selection.
 First but unsuccessful attempt of tissue culture using monocots.
Haberlandt G., Sitzungsber Akad. Wiss. Wien, Math.-Naturwiss. Kl.,
111: 69-92.
 Walter Suton coined the term "gene" and proposed that chromosomes
carry genes (factors that Mendel said that could be passed from
generation to generation)
First attempt in embryo culture of selected Crucifers. Hannig B., Bot.
Zeitung, 62: 45-80.
Fusion of plant protoplasts though the products failed to survive. Kuster E.,
Ber. Dtsch. Bot. Ges., 27: 589-598.
1910
1921
1922
 Thomas H. Morgan proved that genes are carried on chromosomes
 The term “biotechnology" coined
Cultivation of fragments of plant embryos. Molliard M., C. R. Soc. Biol.
(Paris), 84: 770-772
 Asymbiotic germination of orchid seeds. Knudson L., Bot. Gaz.,
73: 1-25.
 In vitro culture of root tips. Robbins W. J., Bot. Gaz.,
73: 376-390
1924
1925
In vitro culture of root tips. Robbins W. J., Bot. Gaz., 73: 376-390
 Embryo culture for interspecific crosses in Linum spp. Laibach F., Z.
Bot., 17: 417-459
 Symbiotic germination of orchid seeds. Knudson L., Bot.
Gaz., 29: 345-379.
1926
FW Went demonstrated that there were growth substances in
coleoptiles from Avena
Embryo culture to avoid cross incompatibility in Linum spp. Laibach F., J
Hered., 20: 201-208.
Plant hybridization used widely in plant breeding
Hybrid corn, developed by Henry Wallace in the 1920s, is commercialized.
Growing hybrid corn eliminates the option of saving seeds. The
remarkable yields outweigh the increased costs of annual seed purchases,
and by 1945, hybrid corn accounts for 78 percent of U.S.-grown corn
 In vitro culture of cambial tissues of different trees and shrubs failed.
Guatheret R. J., C. R. Acad. Sci. (Paris), 198: 2195-2196.
 Successful long-term culture of tomato roots. White P. R., Plant
Physiol., 9: 585-600.
 Identification of the first plant hormone, IAA, leading to cell
enlargement. Kogl F. et al., Z. Physiol. Chem., 228: 90-103
Embryo culture of different gymnosperms. LaRue C. R., Bull. Torrey Bot.
Club, 63: 365-382
 Proteins and DNA studied by x-ray crystallography
 Term “molecular biology" coined
Successful continuously growing cambial cultures of carrot and
tobacco. Gautheret R. J., C. R. Acad. Sci. (Paris), 208: 118-120;
Nobecourt P., C. R. Soc. Biol. (Paris), 130: 1270-1271; White P. R.,
1929
1930-1940
1933
1934
1936
1938
1939
1940
1941
Am. J. Bot., 26: 59-64.
Culture of cambial tissue of Ulmus to study adventitious shoot formation.
Gautheret R. J., C. R. Acad. Sci., 210: 632-634
 Coconut Milk used for growth and development of very young Datura
1942
1943-1950
1944
Mid-1940’s
1946
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
embryos. Overbeek J. van et al., Science, 94: 350-351
 Braun cultured crown gall tissues in vitro
 George Beadle and Edward Tatum proposed the “one gene, one
enzyme” hypothesis
Observation of secondary metabolites in plant callus cultures. Gautheret
R. J. Bull. Soc. Chim. Biol. 41: 13
Tumor-inducing principle of crown gall tumors identified. Braun A. C.
Phytopathol. 33: 85-100 & P. N. A. S. USA 45: 932-938
First In vitro culture of tobacco used to study adventitious shoot
formation. Skoog F., Am. J. Bot., 31: 19-24.
Transition from animal power to mechanical power on farms
First whole plants of Lupinus and Tropaeolum from shoot tips. Ball E., Am.
J. Bot., 33: 301-318.
Formation of adventitious shoots and roots in tobacco. Skoog F. and
Tsui C., Am. J. Bot., 355: 782-787.
Culture of fruits In vitro. Nitsch J. P., Science, 110: 499.
 Organs regenerated from callus of Sequoia. Ball E., Growth, 14: 295325.
 First successful cultures of Monocots using coconut milk. Morel G. C.
R. Acad. Sci., 230: 2318-2320
 Edwin Chargaff determined there is always a ratio of 1:1 adenine to
thymine in DNA of many different organisms
 Culture of excised ovaries In vitro. Nitsch J. P., Am. J. Bot., 38: 566577
 Chemical control of growth and organ formation in culture
demonstrated. Skoog F., Annee Biol., 26: 545-562.
 Virus-free Dahlia through meristem culture. Morel G. and Martin
C., C. R. Hebd. Seances Acad. Sci. (Paris), 235: 1324-1325.
 First successful micro-grafts. Morel G. and Martin C., C. R. Acad.
Sci. (Paris), 235: 1324-1325
 Hershey and Chase used radioactive labeling to determine that DNA
and not protein that carries the instructions for assembly of phages
 Haploid callus from pollen grain of Ginkgo biloba. Tulecke W. R..,
Science, 117: 599-600
 James Watson and Frances Crick identify the helix structure of DNA
First calli produced from a single cell by use of nurse cultures. Muir W. H.
et al., Science, 119: 877-878.
Discovery, structure and synthesis of Kinetin. Miller C. et al., J. Am.
Chem. Soc., 77: 1392 & 2662-2663.
 In vitro cultivation of normal and tumor tissues of Picea glauca. Reinert
J. and White P. R., Physiol. Plant., 9: 177-189.
 US patent NO. 2747334 for: Production of substances from plant tissue
culture of Phaseolus by Routien J. B. and Nickell L. G
 Discovery that root or shoot formation in culture depends on
auxin : cytokinin ratio. Skoog F. and Miller C. O., In vitro Symp.
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1958
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1960
1962
1964
1965
1966
1967
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Soc. Exp. Biol., No. 11: 118-131.
Culture of excised anthers of Allium cepa. Vasil I. K., Phytomorph., 7:
138-149.
Francis Crick and George Gamov explain how DNA functions to make
protein
In vitro culture of excised ovules of Papaver somniferum. Maheshwari
N., Science, 127: 342
Regeneration of somatic embryos from nucellus of Citrus ovules.
Maheshwari P. and Rangaswamy N. S., Ind. J. Hort., 15: 275-281
Pro-embryo formation in callus clumps and cell suspension of
carrot. Reinert J. and Steward F. C., Naturwiss., 45: 344-345.
Growth and development in suspension cultures. Steward F. C. et al.,
Am. J. Bot., 45: 693-708.
Coenberg discovers DNA polymerase
First test tube fertilization in Papaver rhoeas. Kanta K., Nature, 188:
683-684
 Use of the microculture method for growing single cells in hanging
drops in a conditioned medium (Jones et al.)
 Enzymatic degradation of cell wall for protoplast formation.
Cocking E. C., Nature, 187: 927-929.
 Vegetative propagation of orchids by meristem culture. Morel G.,
Am. Orchid Soc. Bull., 29: 495-497.
 Filtration of cell suspensions and isolation of single cells by plating
(Bergmann)
 Isolation of mRNA
 Development of MS medium. Murashige T. and Skoog F., Physiol.
Plant., 15: 473-497
 In vitro flower induction in tobacco Aghion D., C. R. Acad. Sci., 255:
993-995
 First haploid plants from Datura androgenesis. Guha S. and
Maheshwari S. C., Nature, 204: 497 and Nature, 212: 97-98 (1966)
 Regeneration of roots and shoots on callus of Populus tremuloides.
Mathes M. C., Phyton, 21: 137-141
 Differentiation of tobacco plants from a single isolated cell in
microculture. Vasil V. and Hildebrandt A. C., Science, 146: 76-77 &
150: 889-892.
 Protocorm formation in orchids In vitro. Morel G., Cymbidium Soc.
News, 20: 3
Marshall Nirenberg and Severo Ochoa determine that a sequence of 3
nucleotide bases determines each of the 20 amino acids
 Flower induction in Lunaria annua by vernalization In vitro. Pierik R. L.
M., See Pierik R. L. M., (1987
 )In vitro Culture of Higher Plants. Martinus Nijhoff Publishers,
Dordrecht.
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1970
Yields of secondary products in cell culture equal to those of intact
plants of Ammi visnaga. Kaul B. and Staba E. J., Planta Med., 15: 145156.
Enzymes involved in cleaving DNA termed restriction endonucleases
(Meselson and Yuan)
The Green Revolution introduces hybrid seeds into food-short Third World
countries
 Selection of biochemical mutants in tobacco. Carlson P. S.,
Science, 168: 487-489.
 Protoplast fusion. Power J. B. et al., Nature, 225: 1016-1018.
 Hybrid embryo culture and subsequent chromosome elimination
for haploid production in barley (Kao and Kao)
 Discovery of first restriction endonuclease from Haemophillus
influenzae Rd. It was later purified and named HindI (Smith)
1971
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1968
1970s
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1972
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1973
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1974
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Preparation of first restriction map using HindI to cut circular DNA of
SV 40 into 11 specific fragments (Nathans)
Plant regeneration from mesophyll protoplasts of tobacco. Takebe I. Et
al., Naturewiss., 58: 318-320.
Interspecific hybridization of Nicotiana spp. using protoplasts.
Carlson P. S. et al., P. N. A. S. (USA), 69: 2292-2294
Restriction fragments can be joined by DNA ligase regardless of their
origin if they are cut with the same restriction enzyme (Mertz and
Davis; Berg)
Isolation of reverse transcriptase
Use of the Lobban and Kaiser technique to develop hybrid plasmid insertion of EcoRl fragment of DNA molecule into circular plasmid DNA
of bacteria using DNA ligase.
Gene from African clawed toad inserted into plasmid DNA of bacteria
(Herbert Boyer and Stanley Cohen) First recombinant DNAorganism
- beginning of genetic engineering;
Cytokinins found to be capable of breaking dormancy in Gerberas.
Pierik R. L. M. et al., Sci. Hort., 1: 117-119.
Somatic hybridization of tomato and potato, resulting in pomato
(Melchers et al.)
Induction of branching by cytokinins in Gerbera shoot tips Murashige F.
et al., Hortsci., 9: 175-180)
Regeneration of haploid Petunia plants from protoplasts Binding R. J.,
Z. Pflanzenphysiol., 101: 119-130;
Fusion of haploid protoplasts to form polyploids. Melchers G. and Lalib
G., Mol. Gen. Genet. 135: 277-294
Ti plasmid as the tumor inducing principle in crown gall. Zaenen I.
Et al., J. Molec. Biol., 86: 109-127; Larebeke N. van et al., Nature,
252: 169-170.
1975
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1976
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1977
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1978
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1979
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Positive selection of maize callus culture resistant to Helminthosporium
maydis. Gengenbach B. G. and Green C. E., Crop Sci., 15: 645-649
Development of the high resolution two dimensional gel
electrophoresis procedure, which led to the development of proteomics
(O'Farrel);
Moratorium on recombinant DNA techniques
Shoot induction from cryo-preserved shoot tips of carnation. Seibert
M., Science, 191: 1178-1179
Protoplast fusion of Petunia hybrida with P. parodii. Power J. B. et al.,
Nature, 263: 500-502
Octopine and Nopaline synthesis and break-down is regulated by Ti
plasmid. Bomhoff G. et al., Molec. Gen. Genet., 145: 177-178.
National Institute of Health guidelines developed for study of
recombinant DNA
Successful integration of T-DNA in plants. Chilton M. D. et al.,
Cell, 11: 263-271
Cultivation of tobacco cells in 20,000 L bioreactors. Noguchi M. et al.,
Plant Tissue Culture & its Biotechnological Application, Springer
Verlag, Berlin,: 85-94
Development of two-stage culture medium for suspension cell cultures.
Zenk M. H. et al., Plant Tissue Culture & its Biotechnological
Application. Springer Verlag, Berlin,: 27-43.
A method of DNA sequencing developed (Maxam, Gilbert)
Discovery of split genes (Sharp Roberts);
Genentech Inc., reports the production of the first human protein
manufactured in a bacteria: somatostatin, a human growth hormonereleasing inhibitory factor. For the first time, a synthetic, recombinant
gene was used to clone a protein. Many consider this to be the advent
of the Age of Biotechnology.
Genentech, Inc. uses genetic engineering techniques to produce
human insulin in E. coli, became first biotech company on NY stock
exchange
Industrial scale fermentation of plant cells for production of shikonin.
(Selection of cell lines with higher yield of secondary products). Tabata
M. et al., Frontiers of Plant Tissue Culture 1978, Univ. Calgary Press,
Calgary,: 213-222.
Somatic hybridization of tomato and potato. Melchers G. et al.,
Carlsburg Res. Comm., 43: 203-218.
Studies by David Botstein and others found that when a restrictive
enzyme is applied to DNA from different individuals, the resulting sets
of fragments sometimes differ markedly from one person to the next.
Such variations in DNA are called restriction fragment length
polymorphisms, or RFLPs, and they are extremely useful in genetic
studies
Alginate beads used for plant cell immobilization for biotransformation
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1980
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1981
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1982
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1983
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and secondary metabolite production. Brodelius P. et al., FEBS Lett.,
103: 93-97
Co-cultivation procedure developed for the Agrobacterium mediated
transformation of protoplasts. Marton L. et al., Nature, 277: 129-131
The use of immobilized cells for bio-transformation of digitoxin intro
digoxin. Alfermann A. W. et al., Planta Medica, 40: 218
Commercial production of human insulin through genetic engineering
in bacterial cells (Eli Lilly and Co.)
Studies on the structure of T-DNA cloning the complete EcoRl digest of
Ti, tobacco crown gall DNA into a phage vector, thus allowing the
isolation a detailed study of T-DNA border sequence (Zambryski et al);
US Supreme Court decides that manmade microbes can be patented
Introduction of the term somaclonal variaion. Larkin P. J. and
Scowcroft W. R., Theor. Appl. Gen., 60: 197-214
Isolation of auxotrophs by cell colony screening in haploid protolasts of
Nicotiana plumbaginifolia treated with mutagens. Sidorov V. et al.,
Nature, 294: 87-88.
Naked DNA transformation of protoplasts. Krens F. A. et al., Nature,
296: 72-74
Electrofusion of protoplasts Zimmermann U., Biochim. Biophys. Acta,
694: 227-277
Intergeneric cybrid in radish and rape. Pelletier G. et al., Molec. Gen.
Genet., 191:244-250.
First industrial production of secondary metabolites by suspension
cultures of Lithospermum spp. by Mitsui Petrochemicals.
Beneficial use of elicitors in cell suspension cultures. Wolters B. and
Eilert U. Dtsch. Apoth. Zeitg., 123: 659-667
Kary Mullis and others at Cetus Corporation in Berkeley,
California, invented a technique for multiplying DNA sequences in
vitro by, the polymerase chain reaction (PCR). Cetus patented the
process, and in the summer of 1991 sold the patent to Hoffman-La
Roche, Inc. for $300 million
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Co-integrate type of vectors designed for Agrobacterium
transformation. Zambryski P. et al., EMBO J., 2: 2143-2150
Transgenic plants were first created in the early 1980s by four
groups working independently at Washington University in St.
Louis, Missouri, the Rijksuniversiteit in Ghent, Belgium, Monsanto
Company in St. Louis, Missouri, and the University of Wisconsin.
On the same day in January 1983, the first three groups
announced at a conference in Miami, Florida, that they had
inserted bacterial genes into plants. The fourth group announced
at a conference in Los Angeles, California, in April 1983 that they
had inserted a plant gene from one species into another species.
o The Washington University group, headed by Mary-Dell Chilton,
had produced cells of Nicotiana plumbaginifolia, a close relative
of ordinary tobacco, that were resistant to the antibiotic
kanamycin (Framond, A.J., M.W. Bevan, K.A. Barton, F. Flavell,
and M.D. Chilton. 1983. Mini-Ti plasmid and a chimeric gene
construct: new approaches to plant gene vector construction.
Advances in Gene Technology: Molecular Genetics of Plants
and Animals. Miami Winter Symposia Vol. 20:159-170).
o Jeff Schell and Marc Van Montagu, working in Belgium, had
produced tobacco plants that were resistant to kanamycin and
to methotrexate, a drug used to treat cancer and rheumatoid
arthritis (Schell, J., M. van Montagu, M. Holsters, P. Zambryski,
H. Joos, D. Inze, L. Herrera-Estrella, A. Depicker, M. de Block,
A. Caplan, P. Dhaese, E. Van Haute, J-P. Hernalsteens, H. de
Greve, J. Leemans, R. Deblaere, L. Willmitzer, J. Schroder, and
L. Otten. 1983. Ti plasmids as experimental gene vectors for
plants. Advances in Gene Technology: Molecular Genetics of
Plants and Animals. Miami Winter Symposia Vol. 20:191-209).
o Robert Fraley, Stephen Rogers, and Robert Horsch at
Monsanto had produced petunia plants that were resistant to
1985
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kanamycin (Fraley, R.T., S.B. Rogers, and R.B. Horsch. 1983a.
Use of a chimeric gene to confer antibiotic resistance to plant
cells. Advances in Gene Technology: Molecular Genetics of
Plants and Animals. Miami Winter Symposia Vol. 20:211-221.).
o The Wisconsin group, headed by John Kemp and Timothy Hall,
had inserted a bean gene into a sunflower plant.
o These discoveries were soon published in scientific journals.
The Schell group's work appeared in Nature in May (HerreraEstrella, L., A. Depicker, M. van Montagu, and J. Schell. 1983.
Expression of chimaeric genes transfered into plant cells using a
Ti-plasmid-derived vector. Nature 303:209-213) and the Chilton
group's work followed in July (Bevan, M.W., R.B. Flavell, and
M.D. Chilton. 1983. A chimaeric antibiotic resistance gene as a
selectable marker for plant cell transformation. Nature 304:184187). The Monsanto group's work appeared in August in
Proceedings of the National Academy of Sciences (Fraley, R.T.,
S.G. Rogers, R.B. Horsch, P.R. Sanders, J.S. Flick, S.P.
Adams, M.L. Bittner, L.A. Brand, C.L. Fink, J.S. Fry, G.R.
Galluppi, S.B. Goldberg, N.L. Hoffmann, and S.C. Woo. 1983b.
Expression of bacterial genes in plant cells. Proceedings of the
National Academy of Sciences 80:4803-4807). The Hall group's
work appeared in November in the journal Science (Murai, N.,
D.W. Sutton, M.G. Murray, J.L. Slightom, D.J. Merlo, N.A.
Reichert, C. Sengupta-Gopalan, C.A. Stock, R.F. Barker, J.D.
Kemp, and T.C. Hall. 1983. Phaseolin gene from bean is
expressed after transfer to sunflower via tumor-inducing plasmid
vectors. Science 222:476-482).
Transformation of Nicotiana protoplasts with plasmid DNA and
regeneration of transformed plants. Paszkowski J. et al., EMBO J., 3:
2717-2722
Infection and transformation of leaf discs with Agrobacterium
tumefaciens and regeneration of transformed plants. Horsch RB et al.,
Science, 227:1229-1231
Development of disarmed Ti plasmid vector system for plant
transformation. Fraley RT et al, Bio/Technol, 3:629-635
Development of binary vector system for plant transformation. An G. et
al., EMBO J., 4:277-284
Gene transfer in protoplasts of dicot and monocot plants by
electroporation. Fromm ME, PNAS (USA), 82:5824-5828
Genetic Sciences surreptitiously performed the first deliberate release
experiment, injecting genetically engineered microbes into trees
growing on the company's roof, while waiting for approval from the
EPA to conduct a different deliberate release experiment involving
strawberry plants
Pathogen-derived resistance – Sanford and Johnson
Plants can be patented
1986
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1987
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1988
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Transformation of tobacco protoplasts by direct DNA microinjection.
Crossway A. et al., Mol. Gen. Genet., 202: 179-185
TMV virus-resistant tobacco and tomato ( transgenic plants developed
using cDNA of coat protein gene of TMV (Powell-Abel et al)
May 30, USDA authorizes by means of an "Opinion Letter" the first
release of genetically engineered organisms in the environment:
Agracetus' crown-gall resistant tobacco.
Use of Microprojectile gun for particle bombardment for genetic
transformation and recovery of individuals showing transient
gene expression. Klein T. M. et al., Nature, 327: 70-73.
Isolation of Bt gene from bacterium (Bacillus thuringiensis) (Barton et
al);
First monocot (Asparagus) transformation by Agrobacterium
tumefaciens. Bytebier B. et al., P. N. A. S. (USA), 84: 5345-5349.
November 25, USDA under 7CFR 340.3 authorizes first field test -Calgene’s Bromoxynil-Resistant Tobacco
Recovery of stable transformants through particle bombardment.
Klein T. M. et al., P. N. A. S. (USA), 85: 4305-4309.
Automated mass propagation with organogenesis and embryogenesis.
Levi R. et al., Biotechnol., 6: 1035
First field test of a potential commercial product - Calgene plants
Tobacco Mosaic Virus-resistant tomatoes
1990
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1991
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1992
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Formal launch of the Human Genome Program;
Plant transformation by microinjection of intact plant cells. Neuhaus G.,
Physiol. Plant., 79: 213-217.
Electroporation of intact plant tissues for direct DNA delivery. Dekeyser
R. A. et al., Plant Cell, 2: 591-602.
Silicon carbide fiber-mediated DNA delivery in plant cells. Kaeppler H.
F. et al., Plant Cell Rep., 9: 415-418
The first successful field trial of genetically engineered cotton plants (bt
cotton) is conducted
DEKALB receives the first patent for transformed corn.
Cryopreservation of alkaloid-producing cell culture of Catahranthus.
The cells retain the property of alkaloid synthesis even after thawing.
Lynch P. T. and Benson E. E., Rice Genetics II, IRRI, Manila,
Phillipines,: 321
Production of first transgenic plants of a conifer (Larix decidua, by
Agrobacterium rhizogenes mediated transformation). Huang Y. et al.,
In vitro Cell Dev. Biol., 27: 201-207
Successful metabolic engineering of Atropa belladona for increased
alkaloid production. Yun D.-J. et al., P. N. A. S. (USA), 89: 1179911803
Herbicide resistant rice plants through PEG mediated transformation of
protoplasts. Dutta S. K. et al., Plant Mol. Biol., 20: 619-629
1993
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1995-6
1996
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1997
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In vitro fertilization with isolated single gametes resulting in zygotic
embryogenesis and recovery of fertile maize plants. Kranz E. and Lorz
H., The Plant Cell, 5: 739-746
Flavr Savr tomatoes sold to public
EPA registers first pest protected plant—Monsanto’s New Leaf potato
Monsanto's Roundup Ready soybeans, which are resistant to
herbicides, and YieldGard Corn, which is protected from the corn
borer, are approved for sale in the United States.
Bollgard cotton first commercialized in the US
Development of ‘agrolistic’ method of plant transformation. Hansen G.
and Chilton M. D., P. N. A. S. (USA), 93: 14978-14983
Development of a binary bacterial artificial chromosome (BIBAC)
vector for Agrobacterium-mediated transformation (Transfer capacity of
150 kb). Hamilton C. M. et al., P. N. A. S. (USA), 93: 9975-9979.
Posilac bovine somatotropin, designed to increase milk efficiency in
dairy cattle, is approved for use in the United States
Sequencing of E coli genome (Blattner et al)
Roundup Ready cotton first commercialized in the US
Researchers at Scotland's Roslin Institute report that they have cloned
a sheep--named Dolly--from the cell of an adult ewe. Polly the first
sheep cloned by nuclear transfer technology bearing a human gene
appears later
1998
2000
2001
2002
2003
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Sequencing of the genome of a multicellular organism (Caenorhabditis
elegans)
 DEKALB markets the first Roundup Ready corn
 YieldGard® Corn is approved for import into European Union
Arabidopsis draft sequence completed
 Sequencing of the human genome draft completed (Human Genome
Project Consortium and Venter et al)
 First complete map of the genome of a food plant completed: rice
 Toby Bradshaw’s lab is burned down; ELF claims responsibility
 Biotech crops grown on 145 million acres in 16 countries, a 12 percent
increase in acreage grown in 2001. More than one-quarter (27 percent)
of the global acreage was grown in nine developing countries
 Scientists are forced to rethink their view of RNA when they
discover how important small pieces of RNA are in controlling
many cell functions
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Of the soybeans grown in the US, 64% are transgenic; 34% of corn is.
EU Union has had a 5 year ban on GMOs.
Worldwide biotech crop acreage rises 15 percent to hit 167.2 million
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2004
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acres in 18 countries. Brazil and the Philippines grow biotech crops for
the first time in 2003. Also, Indonesia allows consumption of imported
biotech foods and China and Uganda accept biotech crop imports
The U.K. approves its first commercial biotech crop in eight years. The
crop is a biotech herbicide-resistant corn used for cattle feed
The sequencing of the human genome is completed, two years ahead
of schedule
The United Nations Food and Agriculture Organization (FAO) endorses
biotech crops and states that biotechnology is a complementary tool to
traditional farming methods that can help poor farmers and consumers
in developing nations.
The National Academy of Sciences’ Institute of Medicine (IOM) finds
biotech crops do not pose any more health risks than do crops created
by other techniques, and that food safety evaluations should be based
on the resulting food product, not the technique used to create it.
FDA finds biotech wheat safe, after a food safety review