Comparison of growth properties, alkaloid production and water uptake of two selected Datura hairy root lines

Two selected hairy root lines of Datura, D. innoxia and D. candida × D. aurea were compared for their performance in growth and tropane alkaloid productivity in shake flasks. Specific consumption rate and biomass yield on sucrose and nitrates during the phase of maximum growth were calculated versus changes in liquid medium volume during culture. Growth parameters were found to be better in D. innoxia hairy root cultures than in D. candida × D. aurea. Overall productivity of hyoscyamine in D. innoxia (2.1 mg l d) was double that in D. candida × D. aurea (1 mg l d). However, hybrid transgenic roots produced 0.5 mg l d of scopolamine. The relationship between water uptake and root growth was studied. During the first days of culture, water was released into the culture medium and then reabsorbed in the root tissue. After that, water uptake on a biomass basis in D. innoxia and D. candida × D. aurea transformed root cultures reached 0.74 and 0.53 ml g FW, respectively. The correlation between biomass accumulation and liquid medium volume could be used as a simple and inexpensive method for indirect estimation of root growth.

[1]  M. Roberts Production of Alkaloids in Plant Cell Culture , 1998 .

[2]  A. Giulietti,et al.  Tropane alkaloid production in transformed root cultures of brugmansia Candida. , 1993, Planta medica.

[3]  Liukang Xu,et al.  Sensitivity of growth of roots versus leaves to water stress: biophysical analysis and relation to water transport. , 2000, Journal of experimental botany.

[4]  R. Robins,et al.  Biosynthesis of hyoscyamine involves an intramolecular rearrangement of littorine , 1994 .

[5]  J. Shanks,et al.  Plant 'hairy root' culture. , 1999, Current opinion in biotechnology.

[6]  Yamamoto,et al.  Viability of plant hairy roots is sustained without propagation in low sugar medium kept at ambient temperature. , 2000, Biochemical engineering journal.

[7]  R. Zárate Tropane alkaloid production by Agrobacterium rhizogenes transformed hairy root cultures of Atropa baetica Willk. (Solanaceae) , 1999, Plant Cell Reports.

[8]  K. Oksman-Caldentey,et al.  Regulation of Tropane Alkaloid Metabolism in Plants and Plant Cell Cultures , 2000 .

[9]  B. Sangwan-Norreel,et al.  Influence of feeding precursors on tropane alkaloid production during an abiotic stress in Datura innoxia transformed roots , 2000, Plant Cell, Tissue and Organ Culture.

[10]  P. Christen,et al.  Tropane Alkaloids in Transformed Roots of Datura quercifolia , 1994, Planta medica.

[11]  V. Luca,et al.  The cell and developmental biology of alkaloid biosynthesis , 2000 .

[12]  P. Doran,et al.  Characteristics of growth and tropane alkaloid synthesis in Atropa belladonna roots transformed by Agrobacterium rhizogenes , 1990 .

[13]  J. Memelink,et al.  Engineering the plant cell factory for secondary metabolite production , 2004, Transgenic Research.

[14]  Kirsi-Marja Oksman-Caldentey,et al.  Agrobacterium rhizogenes-Mediated Transformation: Root Cultures as a Source of Alkaloids , 2002, Planta medica.

[15]  Ramakrishnan,et al.  Monitoring biomass in root culture systems. , 1999, Biotechnology and bioengineering.

[16]  R. Miller,et al.  Nutrient requirements of suspension cultures of soybean root cells. , 1968, Experimental cell research.

[17]  K. Tamura,et al.  Metabolic engineering of plant alkaloid biosynthesis. , 2001, Proceedings of the National Academy of Sciences of the United States of America.

[18]  P. Christen,et al.  Hairy roots of Datura candida×D. aurea: effect of culture medium composition on growth and alkaloid biosynthesis , 1998, Plant Cell Reports.