Ontogenetic changes of photosynthetic and dark respiration rates in relation to nitrogen content in individual leaves of field crops

• Published in: Photosynthetica Vol. 39; no. 2; pp. 205 - 213
• Main Authors: Osaki, M, Shinano, T, Kaneda, T, Yamada, S, Nakamura, T. (Hokkaido Univ., Sapporo (Japan). Graduate School of Agriculture)
• Format: Journal Article
• Language: English
• Published: 01.06.2001
• Subjects: BETA VULGARIS; CONTENIDO DE NITROGENO; CULTIVOS DE INVIERNO; CULTURE D'HIVER; DARKNESS; ETAPAS DE DESARROLLO DE LA PLANTA; FEED CROPS; FEUILLE; FOTOSINTESIS; GLYCINE MAX; HOJAS; LEAVES; LIGHT REGIMES; LYCOPERSICON ESCULENTUM; NITROGEN CONTENT; OBSCURIDAD; OBSCURITE; ORYZA SATIVA; PHASEOLUS VULGARIS; PHOTOSYNTHESE; PHOTOSYNTHESIS; PLANT DEVELOPMENTAL STAGES; PLANTAS FORRAJERAS; PLANTE FOURRAGERE; REGIME LUMINEUX; REGIMENES DE LUZ; RESPIRATION RATE; SOLANUM TUBEROSUM; STADE DE DEVELOPPEMENT VEGETAL; TASA DE RESPIRACION; TAUX DE RESPIRATION; TENEUR EN AZOTE; TRITICUM AESTIVUM; WINTER CROPS; ZEA MAYS
• ISSN: 0300-3604; 1573-9058
• DOI: 10.1023/a:1013774908492

Ontogenetic changes of rates of photon-saturated photosynthesis (Psat) and dark respiration (RD) of individual leaves were examined in relation to nitrogen content (Nc) in rice, winter wheat, maize, soybean, field bean, tomato, potato, and beet. PsB, was positively correlated with Nc as follows: Psat = Cf Nc + Psat, where Cf and Psat are coefficients. The value of Cf was high in maize, medíum in rice and soybean, and low in field bean, potato, tomato, and beet, of which difference was not explained by ribulose-1,5-bisphoshate carboxylase/oxygenase (RuBPCO) content. RD was explained by Psat and/or Nc, however, two models must be applied according to plant species. RD related linearly with PsBt and Nc in maize, field bean, and potato.