Abstract
The radiotracer 13N was used to undertake compartmental analyses for NO −3 in intact non-mycorrhizal roots of Picea glauca (Moench) Voss. seedlings. Three compartments were defined, with half-lives of exchange of 2.5 s, 20 s, and 7 min. These were identified as representing surface adsorption, apparent free space, and cytoplasm, respectively. Influx, efflux, and net flux as well as cytoplasmic and apparent-free-space nitrate concentrations were estimated for three different concentration regimes of external nitrate. After exposure to external NO −3 for 3 d, influx was calculated to be 0.09 μmol·g−1·h−1 (at 10 μM [NO −3 ]o), 0.5μmol·g−1·h−1 (at 100 μM [NO sup−inf3 ]o), and 1.2 μmol · g−1· h−1 (at 1.5 mM [NO −3 ]o). Efflux increased with increasing [NO −3 ]o, constituting 4% of influx at 10 μM, 6% at 100 μM, and 21% at 1.5 mM. Cytoplasmic [NO −3 ] was estimated to be 0.3 mM at 10 uM [NO −3 ]o, 2mM at 100 μM [NO −3 ]o, and 4mM at 1.5 mM [NO −3 ]o, while free-space [NO −3 ] was 16 μM, 173 μM, and 2.2 mM, respectively. A series of experiments was carried out to confirm the identity of the compartments resolved by efflux analysis. Pretreatment at high temperature or application of 2-chloro-ethanol, sodium dodecyl sulphate or hydrogen peroxide made it possible to distinguish the metabolic (cytoplasmic) phase from the remaining two (physical) phases. Likewise, varying [Pi] of the medium altered efflux and thereby [NO −3 ]cyt, but did not affect [NO −3 ]free space.
Similar content being viewed by others
Abbreviations
- [NO −3 ]cyt :
-
cytoplasmic NO −3 concentration
- [NO −3 ]free space :
-
apparent-free-space NO −3 concentration
- [NO −3 ]o :
-
concentration of NO −3 in the external solution
- φ:
-
NO −3 flux
- φco :
-
efflux from the cytoplasm
- φoc :
-
influx to the cytoplasm
- φnet :
-
net flux
- φxylem :
-
flux to the xylem
- φred/vac :
-
combined flux to reduction and the vacuole
References
Aguera, E., de la Haba, P., Fontes, A.G., Maldonado, J.M. (1990) Nitrate and nitrite uptake and reduction by intact sunflower plants. Planta 182, 149–154
Belton, P.S., Lee, R.B., Ratcliffe, R.G. (1985) A 14N nuclear magnetic resonance study of inorganic nitrogen metabolism in barley, maize and pea roots. J. Exp. Bot. 36, 190–210
Cawse, P.A. (1967) The determination of nitrate in soil solutions by ultraviolet spectrophotometry. Analyst 92, 311–315
Chapin, F.S. III, van Cleve, K., Tyron, P.R. (1986) Relationship of ion absorption to growth rate in taiga trees. Oecologia 69, 238–242
Clarkson, D.T. (1986) Regulation of the absorption and release of nitrate by plant cells. In: Fundamental, ecological and agricultural aspects of nitrogen metabolism in higher plants, pp. 3–27, Lambers, H., Neeteson, J.J., Stulen, I., eds. Martinus Nijhoff, Boston
Cram, W.J. (1973) Chloride fluxes in cells of the isolated root cortex of Zea mays. Aust. J. Biol. Sci. 26, 757–779
Devienne, F., Mary, B., Lamaze, T. (1994) Nitrate transport in intact wheat roots. I. Estimation of cellular fluxes and NO −3 distribution using compartmental analysis from data of 15NO −3 efflux. J. Exp. Bot. 45, 667–676
Ferrari, T.E., Yoder, O.C., Filner, P. (1973) Anaerobic nitrite production by plants cells and tissues: evidence for two nitrate pools. Plant Physiol. 51, 423–431
Flaig, H., Mohr, H. (1992) Assimilation of nitrate and ammonium by the Scots pine (Pinus sylvestris) seedling under conditions of high nitrogen supply. Physiol. Plant. 84, 568–576
Glass, A.D.M. (1988) Nitrogen uptake by plant roots. Atlas Sci. Anim. Plant Sci. 1, 151–156
Kamminga-van Wijk, C., Prins, H.B.A. (1993) The kinetics of NH +4 and NO −3 uptake by Douglas fir from single N-solutions and from solutions containing both NH +4 and NO −3 . Plant Soil 151, 91–96
King, B.J., Siddiqi, M.Y., Glass, A.D.M. (1992) Studies of the uptake of nitrate in barley. V. Estimation of root cytoplasmic nitrate concentration using nitrate reductase activity — implications for nitrate flux. Plant Physiol. 99, 1582–1589
Knoepp, J.D., Turner, D.F., Tingey, D.T. (1993) Effects of ammonium and nitrate on nutrient uptake and activity of nitrogen assimilating enzymes in western hemlock. For. Ecol. Manage. 59, 179–191
Kronzucker, H.J., Glass, A.D.M., Siddiqi, M.Y. (1995a) Nitrate induction in spruce: an approach using compartmental analysis. Planta 196, 683–690
Kronzucker, H.J., Siddiqi, M.Y., Glass, A.D.M. (1995b) Compartmentation and flux characteristics of ammonium in spruce. Planta 196, 691–698
Lavoie, N., Vézina, L.-P., Margolis, H.A. (1992) Absorption and assimilation of nitrate and ammonium ions by Jack pine seedlings. Tree Physiol. 11, 171–183
Lee, R.B., Clarkson, D.T. (1986) Nitrogen-13 studies of nitrate fluxes in barley roots. I. Compartmental analysis from measurements of 13N efflux. J. Exp. Bot. 37, 1753–1756
Likens, G.E., Borman, F.H., Johnson, N.M. (1969) Nitrification: importance to nutrient losses for a cutover forest ecosystem. Science 163, 1205–1206
Littke, W.R., Bledsoe, C.S., Edmonds, R.L. (1984) Nitrogen uptake and growth in vitro by Hebeloma crustuliniforme and other Pacific Northwest mycorrhizal fungi. Can. J. Bot. 62, 647–652
Lodhi, M.A.K. (1978) Inhibition of nitrifying bacteria, nitrification and mineralization of spoil soils as related to their successional stages. Bull. Torrey Bot. Club 106, 284–289
Mackion, A.E.S., Ron, M.M., Sim, A. (1990) Cortical cell fluxes of ammonium and nitrate in excised root segments of Allium cepa L.; studies using 15N. J. Exp. Bot. 41, 359–3
Marschner, H., Häussling, M., George, E. (1991) Ammonium and nitrate uptake rates and rhizosphere pH in non-mycorrhizal roots of Norway spruce (Picea abies L. Karst.). Trees 5, 14–21
McNaughton, G.S., Presland, M.R. (1983) Whole plant studies using radioactive 13-nitrogen. I. Techniques for measuring the uptake and transport of nitrate and ammonium ions in hydroponically grown Zea mays. J. Exp. Bot. 34, 880–892
Meeks, J.C. (1993) 13N techniques. In: Nitrogen isotope techniques, pp. 273–303, Knowles, R., Blackburn, T.H., eds. Academic Press, Inc., San Diego, Calif.
Miller, A.J., Smith, S.J. (1992) The mechanism of nitrate transport across the tonoplast of barley root cells. Planta 187, 554–557
Plassard, C., Barry, D., Eltrop, L., Mousin, D. (1993) Nitrate uptake in maritime pine (Pinus pinaster) and the ectomycorrhizal fungus Hebeloma cylindrosporum: effect of ectomycorrhizal symbiosis. Can. J. Bot. 72, 189–197
Presland, M.R., McNaughton, G.S. (1984) Whole plant studies using radioactive 13-nitrogen. II. A compartmental model for the uptake and transport of nitrate ions by Zea mays. J. Exp. Bot. 35, 1277–1288
Redinbaugh, M.G., Campbell, W.H. (1993) Glutamine synthetase and ferredoxin-dependent glutamate synthase in the maize (Zea mays) root primary response to nitrate. Plant Physiol. 101, 1249–1255
Rice, E.L., Pancholy, S.K. (1972) Inhibition of nitrification by climax ecosystems. Am. J. Bot. 59, 1033–1040
Robin, P., Conejero, G., Passama, L., Salsac, L. (1983) Evaluation de la fraction metabolisable du nitrate par la mesure in situ de sa réduction. Physiol. Vég. 21, 115–122
Rygiewicz, P.T., Bledsoe, C., Zasoski, R.J. (1984a) Effect of ectomycorrhizae and solution pH on 15N-ammonium uptake by coniferous seedlings. Can J. Bot. 14, 885–892
Rygiewicz, P.T., Bledsoe, C., Zasoski, R.J. (1984b) Effect of ectomycorrhizae and solution pH on 15N-nitrate uptake by coniferous seedlings. Can. J. For. Res. 14, 893–899
Siddiqi, M.Y., Glass, A.D.M., Ruth, T.J., Rufty, T.W. (1990) Studies of the uptake of nitrate in barley. I. Kinetics of 13NO −3 influx. Plant Physiol. 93, 1426–1432
Siddiqi, M.Y., Glass, A.D.M., Ruth, T.J. (1991) Studies of the uptake of nitrate in barley. III. Compartmentation of NO −3 . J. Exp. Bot. 42, 1455–1463
Siddiqi, M.Y., King, B.J., Glass, A.D.M. (1992) Effects of nitrite, chlorate, and chlorite on nitrate uptake and nitrate reductase activity. Plant Physiol. 100, 644–650
Smirnoff, N., Stewart, G.R. (1985) Nitrate assimilation and translocation by higher plants: comparative physiology and ecological consequences. Physiol. Plant. 64, 133–140
Solomonson, L.P., Barber, M.J. (1990) Assimilatory nitrate reductase: functional properties and regulation. Annu. Rev. Plant Physiol. Plant Mol. Biol. 41, 225–253
Vogt, M., Edmonds, R.L. (1982) NO −3 and NH +4 levels in relation to site quality in Douglas-fir soil and litter. Northwest Sci. 56, 83–89
Walker, N.A., Pitman, M.G. (1976) Measurement of fluxes across membranes. In: Encyclopedia of plant physiology, vol. 2, part A, pp. 93–126, Lüttge, U., Pitman, M.G., eds., Springer Verlag, Berlin
Wang, M.Y., Siddiqi, M.Y., Ruth, T.J., Glass, A.D.M. (1993) Ammonium uptake by rice roots. I. Fluxes and subcellular distribution of 13NH +4 . Plant Physiol. 103, 1249–1258
Author information
Authors and Affiliations
Corresponding author
Additional information
The research was supported by a Natural Sciences and Engineering Research Council, Canada, grant to Dr. A.D.M. Glass and by a University of British Columbia Graduate Fellowship to Herbert J. Kronzucker. Our thanks go to Dr. M. Adam and Mr. P. Culbert at the particle accelerator facility TRIUMF on the University of British Columbia Campus for providing 13NO −3 , Drs. R.D. Guy and S. Silim for providing plant material, and Dr. M.Y. Wang, Mr. J. Mehroke and Mr. P. Poon for assistance in experiments and for helpful discussions.
Rights and permissions
About this article
Cite this article
Kronzucker, H.J., Siddiqi, M.Y. & Glass, A.D.M. Compartmentation and flux characteristics of nitrate in spruce. Planta 196, 674–682 (1995). https://doi.org/10.1007/BF00197331
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00197331