Responses of ribulose-1,5-biphosphate carboxylase, protein content, and stomatal conductance to water deficit in maize, tomato and bean

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: Psa...

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Bibliographic Details
Published in:Photosynthetica 2001-06, Vol.39 (2)
Main Authors: Castrillo, M, Guenni, L. (Universidad Simon Bolivar, Caracas (Venezuela)), Fernandez, D, Calcagno, A.M, Trujillo, I
Format: Article
Language:English
Subjects:
BESOIN EN EAU
CONTENIDO PROTEICO
DEFICIT DE HUMEDAD EN EL SUELO
DEFICIT HYDRIQUE DU SOL
DROUGHT STRESS
ESTOMA
ESTRES DE SEQUIA
LYCOPERSICON ESCULENTUM
NECESIDADES DE AGUA
PHASEOLUS VULGARIS
PLANT PROTEIN
PLANT WATER RELATIONS
PROTEIN CONTENT
PROTEINAS VEGETALES
PROTEINE VEGETALE
RELACIONES PLANTA AGUA
RELATION PLANTE EAU
RUBISCO
SOIL WATER DEFICIT
STOMATA
STOMATE
STRESS DU A LA SECHERESSE
TENEUR EN PROTEINES
TRANSPIRACION
TRANSPIRATION
WATER REQUIREMENTS
ZEA MAYS
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Summary: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.
ISSN:0300-3604
1573-9058