Clonal variation

Barber, I., Baird, D.J. and Calow, P. (1990) Clonal variation in general responses of Daphnia magna Straus to toxic stress. II. Physiological effects, Functional Ecology 4, 409-414. 

Yokoyama I, Waxman F. Isotypic and clonal variations in the interactions between model monoclonal immune complexes and the human erythrocyte CR1 receptor. Mol Immunol 1992 29(7-8) 935-47. 

Many chemotaxonomic studies have been published that consists of lists of phytochemical data, but a significant number of studies are now appearing that probe such questions as the genetics of terpenoid formation, hybridization and clonal variation, and biochemical evolution. Reviews have appeared on the chemotaxonomy of flowering plants,435 and of terpenoid formation in particular,436 on chemistry in botanical classification,437 on leaf oils of conifers,438 and on biochemical evolution in plants 439 the last named is comprehensive and quite outstanding. 

Independent clones isolated by transfection of a given host strain by the same vector can differ in their expression capabilities. Such clonal variation has been observed in most expression systems currently in use, and therefore examination of several independent clones for the desired expression and fermentation characteristics is a routine part of protein yield optimization. However, clonal variation is an ongoing process in all cultures that are propagated and is therefore not eliminated once a pure strain has been isolated. Thus, the properties and genetic background of the production strains have to be monitored constantly. Master cell banks (MCBs) and master working cell banks (MWCBs) are prepared to ensure... 

This section reviews phytochemical studies concerned with geographical and clonal variation of terpenoid content, variation during the growing season, taxonomic and evolutionary implications, hybridization, and genetics of terpenoid development. 

Figure 5.12. Clonal variation in air-dry density of sugi, Cryptomeria japonica, with ring position (Fujisawa et al, 1993).

Owuor, P. O. and Obanda, M. 1995. Clonal variation in the individual theaflavin levels and their impact on astringency and sensory evaluations. Food Chem. 54 273-77. 

Even if the alkaloid content is quite high, an important step in the establishment of root cultures is the selection of the best clones which combine good growth and high alkaloid production. The occurrence of clonal variations allows the selection of high-producing lines. Mano et al. [78] were able to select a clone of hairy roots of Duboisia leichhardtii, producing 2.1 % DW scopolamine, more than twice the amount found in the leaves of the non-transformed plants. 

HWANG, S.Y., LINDROTH, R.L., Clonal variation in foliar chemistry of aspen Effects on gypsy moths and forest tent caterpillars, Oecologia, 1997, 111, 99-108. 

Subramaniam, A. Molecular Weight and Other Properties of Natural Rubber A Study of Clonal Variations, ProcIntRubbConf 1975 Rubber Research Institute of Malaysia, Kuala Lumpur, 3. 

CLONAL VARIATION IN OXYGEN EVOLUTION IN FICUS BENJAMINA L. 

Clonal variation in respiration and in net photosynthesis of whole plant and on single leaf level have been observed in Ficus benjamins, but clonal differences in response to environmental conditions have also been found (1,2,3). 

Is the observed intraspecific variation in peristome ornamentation patterns a result of cryptic speciation, clonal variation or phenotypic variation ... 

Adams, G.W., and H.A Kunze. 1996. Clonal variation in cone and seed production in black and white spruce seed orchards and management implications. For. Chron. 72 475-480. 

Colombo, S.J., M.L. Colclough, V.R. Timmer and E. Blumwald. 1992. Clonal variation in heat tolerance and heat shock protein expression in black spruce. Silvae Genet 41 234-239. 

Turgeon, J.J. 1990. Clonal variation in susceptibility to damage by insects infesting cones and seeds in black and white spruce seed orchards preliminary results. Pp. 89-99 in R.J. West (ed.), Proc. - Cone and Seed Pest Workshop, St. John s, Newfoundland. 1989. For. Can. Info Rep. N-X-274, 128 pp. 

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