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Liquid Culture Systems for in vitro Plant Propagation

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Development and validation of low cost bioreactor 523<br />

production that could be reached with such bioreactors. We showed that very<br />

high densities of Ruta shoots can be obta<strong>in</strong>ed and that a scale up step at 20 l<br />

can be per<strong>for</strong>med successfully. This plant material conta<strong>in</strong>s large amounts of<br />

FCs that can be released when permeabiliz<strong>in</strong>g the biomass with detergent<br />

(Tween20). This process can be per<strong>for</strong>med without kill<strong>in</strong>g the tissues,<br />

allow<strong>in</strong>g further culture and permeabilization cycles.<br />

In conclusion, based on the experience we ga<strong>in</strong>ed <strong>in</strong> the past on hairy<br />

root cultures (Boitel-Conti et al., 1995 a, b, 1996, 1997), we developed a<br />

home-made, simple and low costs bioreactor system that allowed a good<br />

biomass and FCs production. These results are of <strong>in</strong>terest <strong>for</strong> potential<br />

applications of plant organ cultures <strong>for</strong> secondary metabolite production.<br />

They are also very promis<strong>in</strong>g <strong>for</strong> develop<strong>in</strong>g useful bioreactor systems <strong>for</strong><br />

plant micropropagation (Gontier et al., 1993; Lorenzo et al., 1998, Hsiao et<br />

al., 1999).<br />

References<br />

Boitel-Conti M, Laberche JC, Gontier E & Sangwan-Norreel BS (1995a) <strong>Culture</strong> de rac<strong>in</strong>es<br />

trans<strong>for</strong>mées de Datura <strong>in</strong>noxia Mill. en bioréacteur: comparaison de 3 types de procédés.<br />

C.R. Acad. Sci. Paris 318: 593-598<br />

Boitel-Conti M, Gontier E, Laberche JC, Ducrocq C and Sangwan-Norreel BS (1995b)<br />

Permeabilization of Datura <strong>in</strong>noxia hairy roots <strong>for</strong> release of stored tropane alkaloids.<br />

<strong>Plant</strong>a Medica 61: 287-290<br />

Boitel-Conti M, Gontier E, Laberche JC, Ducrocq C & Sangwan-Norreel BS (1996) Inducer<br />

effect of Tween 20 permeabilization treatment used <strong>for</strong> release of stored tropane alkaloids<br />

<strong>in</strong> Datura <strong>in</strong>noxia Mill. hairy root cultures. <strong>Plant</strong> Cell Reports 16: 241-244<br />

Boitel M, Gontier E, Assaf C, Laberche JC, Ducrocq C & Sangwan-Norreel BS (1997)<br />

Procédés de production de métabolites primaires et secondaires à partir d'organes végétaux<br />

cultivés <strong>in</strong> <strong>vitro</strong>, Patent: France n°FR 97 00641<br />

Bourgaud F, Gravot A, Milesi S & Guckert A (2001) Production of plant secondary<br />

metabolites: a historical perspective. <strong>Plant</strong> Science 161: 839-851<br />

Dornenburg H & Knorr D (1995) Strategies <strong>for</strong> the improvement of secondary metabolite<br />

production <strong>in</strong> plant cell cultures. Enzyme and Microbial Technology 17: 674-684<br />

Gamborg OL, Miller RA & Ojima V (1968) Nutrient requirements of suspension cultures of<br />

soybean root cells. Exp. Cell. Res. 50: 151-158<br />

Gontier E, Clement A, Tran TLM, Lievre K, Gravot A, Guckert A & Bourgaud F (2002)<br />

Hydroponic comb<strong>in</strong>ed with natural or <strong>for</strong>ced root permeabilization: a promis<strong>in</strong>g technique<br />

<strong>for</strong> plant secondary metabolites production. <strong>Plant</strong> Science (<strong>in</strong> press)<br />

Gontier E, Fl<strong>in</strong>iaux MA, Barbot<strong>in</strong> JN & Sangwan-Norreel BS (1993) Tropane alkaloid levels<br />

<strong>in</strong> the leaves of micropropagated Datura <strong>in</strong>noxia Mill. plants. <strong>Plant</strong>a Medica 59: 432-435<br />

Hsiao TY, Bacani FT, Carvalho EB & Curtis WR (1999) Development of a low capital<br />

<strong>in</strong>vestment reactor system: application <strong>for</strong> plant cell suspension culture. Biotechnol. Prog.<br />

15: 114-122<br />

Koppenhofer E (1995) Kaliumkanalblocker <strong>in</strong> der Neurologie: 5-MOP zur Behandlung MSbed<strong>in</strong>gter<br />

Funktionsdefizite. TW Neurologie Psychiatrie: 585-591

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