![]() ![]() In: Reuther W, Batchelor LD, Webber HJ (eds) The citrus industry, vol 2, Anatomy, physiology, genetics, and reproduction. Proc Natl Acad Sci U S A 87:3459–3463Įrickson LC (1968) The general physiology of citrus. In: Goren R, Mendal K (ed) Proceeding of sixth international citrus congress, Rehovot, pp 663–672Įdwards JW, Walker EL, Coruzzi GM (1990) Cell-specific expression in transgenic plants reveals nonoverlapping roles for chloroplast and cytosolic glutamine synthetase. Plant Cell Physiol 29:1193–1200ĭuplessis SF, Koen TJ (1988) The effect of N and K fertilization on yield and fruit size of Valencia. American Society of Plant Physiologists, Rockville, pp 786–849ĭay DA, Salom CL, Azcon-bieto J et al (1988) Glutamate oxidation by soybean cotyledon and leaf mitochondria. In: Buchanan BB, Gruissem W, Jones RL (eds) Biochemistry & molecular biology of plants. Annu Rev Genet 27:115–146Ĭrawford NM, Kahn ML, Leustek T (2000) Nitrogen and sulfur. American Society of Plant Physiologists, Rockville, pp 358–410Ĭrawford NM, Arst HNJ (1993) The molecular genetics of nitrate assimilation in fungi and plants. Physiol Plant 90:259–268Ĭorruzi G, Last R (2000) Amino acids. University of California, Division of Agricultural Sciences, Berkeley, pp 127–289Ĭhaillou S, Rideout JW, Raper CD, Morot-Gaudry JF (1994) Responses of soybean to ammonium and nitrate supplied in combination to the whole root system or separately in a split-root system. ![]() Proc Fla State Hortic Soc 103:42–44Ĭhapman HD (1968) The mineral nutrition of citrus. Planta 163:517–526Ĭastle WS, Rouse RE (1990) Total nutrient content of Florida citrus nursery plants. Plant J 2:893–898Ĭammaerts D, Jacobs M (1985) A study of the role of glutamate dehydrogenase in the nitrogen metabolism of Arabidopsis thaliana. Planta 177:359–366īowsher CG, Boulton EL, Rose J et al (1992) Reductant for glutamate synthase is generated by the oxidative pentose phosphate pathway in non-photosynthetic root plastids. J Hortic Sci 38:175–198īowsher CG, Hucklesby DP, Emes MJ (1989) Nitrite reduction and carbohydrate metabolism in plastids purified from roots of Pisum sativum L. Physiol Plant 20:500–506īouma D, Mcintyre GA (1963) A factorial field experiment with citrus. Keywordsīar-akiva A, Sagiv J (1967) Nitrate reductase in the citrus plants: properties, assay conditions and distribution within the plant. Irrespective of origin, conditions, and nucleotide similarities, citrus species in general conserve a precise set of enzymes for nitrogen metabolism. These species are part of the CitEST Brazilian program which is focusing on efforts to obtain a great number of EST (expressed sequence tags) related to different citrus species and genera at different developmental stages or under biotic or abiotic stresses. From a number of essential enzymes involved in this process, we depicted seven enzymes named nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), glutamate synthase (GOGAT), glutamate dehydrogenase (GDH), aspartate aminotransferase (AspAT), and asparagine synthetase (AS) for gene prospection based on EST sequencing of Citrus sinensis, C. This vital process integrates pathways from energetic, central intermediary, and biosynthetic metabolism routes, culminating in the translocation of compounds by all parts of the plant. Nitrogen is first assimilated in organic forms as glutamine, glutamate, aspartate, and asparagine from ammonium or nitrate. Nitrogen metabolism in citrus arouses special interest among other plant nutrients due to its important role in plant growth and fruit production. ![]()
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