Accumulation and Vacuolar Remobelization of Nitrate in Catharanthus Roseus Cells
Most of the higher plants growing in soils obtain their nitrogen in the form of nitrate. Control of the availability of intracellular nitrate has generally been considered to function via regulation of enzymes involved in nitrate assimilation. However, nitrate which can be accumulated in large quantities in certain crop plants, was shown to be mainly located in the vacuoles, and this vacuolar pool is probably a nitrogen reserve. The transfer processes for nitrate into the different compartments of the cells can thus be considered as limiting steps in nitrate assimilation.
KeywordsPermeability Corn Nitrite Assimilation Pyruvate
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- Beevers L, Hageman RH (1980) Nitrate and nitrite reduction. In: Stumpf PR, Conn EE (eds) The Biochemistry of Plants, vol 5. Acad Press, New York London, pp 115–168Google Scholar
- Boudet AM, Alibert G, Marigo G, Ranjeva R (1987) The vacuole: Possible role in signal transduction versus cytoplasmic homeostasis. In: Marin B (ed) Plant Vacuoles. Life Sciences, Plenum, New York, pp 427–437Google Scholar
- Guern J, Kurkjian A, Mathieu Y (1982) Hormonal regulation of intracellular pH: Hypotheses versus facts. In: Wareing PF (ed) Plant Growth Substances. Aberystwyth, pp 427–437Google Scholar
- Marigo G, Delorme YM, Liittge U, Boudet AM (1983) Role de l’acide malique dans la regulation du pH vacuolaire dans les cellules de Catharanthus roseus cultivees in vitro. Physiol Veg 21: 1135–1144Google Scholar
- Marigo G, Bouyssou H, Laborie D (1988) Evidence for malate transport into vacuoles isolated from Catharanthus roseus cells. Botanica Acta 101: 187–191Google Scholar