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Titre :
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Relationships between shoot to root ratio, growth and leaf soluble protein concentration of Pisum sativum, Phaseolus vulgaris and Triticum aestivum under different nutrient deficiencies
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Auteurs :
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M. Andrews ;
J. Sprent ;
J. Raven ;
P. Eady
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Type de document :
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article/chapitre/communication
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Année de publication :
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1999
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Format :
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949-958
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Langues:
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= Anglais
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Mots-clés:
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Phaseolus vulgaris
;
Pisum sativum
;
Triticum aestivum
;
dry matter partitioning
;
macronutrients
;
nitrogen
;
pea
;
pinto bean
;
protein
;
wheat
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Résumé :
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Relations between shoot to root dry weight ratio (S : R), total plant dry weight (DW), shoot and plant N concentration and leaf soluble protein concentration were examined for pea (Pisum sativum L.), common bean (Phaseolus vulgaris L.) and wheat (Triticum aestivum L.) under different nutrient deficiencies. A regression model incorporating leaf soluble protein concentration and plant DW could explain greater than 80% of the variation in S : R within and between treatments for pea supplied different concentrations of NO3- or NH4+ in solid substrate; pea and bean supplied different concentrations of N, P, K and Mg in liquid culture; and wheat supplied different concentrations of N, P, K, Mg, Ca and S in liquid culture. Addition of shoot or plant N concentration to the model explained little more of the variation in S : R, It is concluded that results are consistent with the proposal that macronutrient effects on S : R are primarily mediated through their effects on protein synthesis and growth.
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Source :
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Plant Cell and Environment - 0140-7791, vol. 22, n° 8
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