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Technological problems in cultivation of plant cells at high density
Author(s) -
Tanaka Hideo
Publication year - 2000
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/(sici)1097-0290(20000320)67:6<775::aid-bit14>3.0.co;2-n
Subject(s) - laboratory flask , erlenmeyer flask , bioreactor , shaker , plant cell , volume (thermodynamics) , industrial fermentation , mass transfer coefficient , mass transfer , chromatography , chemistry , mixing (physics) , fermentation , botany , biology , food science , biochemistry , physics , quantum mechanics , gene , vibration
Using Cudrania tricuspidata cells as model plant cells which have high sensitivity to hydrodynamic stress, technological problems in the cultivation of the plant cells at high density were investigated. Using “shake” flasks on a reciprocal shaker and Erlenmeyer flasks on a rotary shaker and with a high supply of oxygen in order to obtain high cell densities in shaken cultures, particle breakdown and damage to the largest cell aggregate group (above 1981 μm in diameter) occurred and normal cell growth became impeded. The mass‐transfer coefficient ( K ( for a model solid–liquid system (β‐naphthol particles and water) in place of a system of plant cells and a liquid medium was proposed as an intensity index of hydrodynamic stress effects on plant cells in suspension cultures under various conditions in the bioreactor systems. Normal cell growth was obtained under culture conditions for K values less than about 4.4 × 10 −3 cm/sec. The characteristics of various bioreactors used until now were investigated by considering the three main technological factors (capacity of oxygen supply, intensity of hydrodynamic stress effects on plant cells, and intensity of culture broth mixing and air‐bubble dispersion). The most suitable bioreactor for culturing plant cells at high density was a jar fermentor with a modified paddle‐type impeller (J‐M). The yield of cell mass in the 10‐liter J‐M (working volume 5 liter) was about 30 g dry weight per liter of medium.