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Diurnal variations in growth rate and growth substrate levels of spinach ( Spinacia oleracea L.) under nitrogen‐limiting conditions
Author(s) -
BUYSSE J.,
MERCKX R.
Publication year - 1995
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1995.tb00203.x
Subject(s) - spinacia , spinach , shoot , sugar , limiting , chenopodiaceae , amino acid , nitrogen , biology , horticulture , substrate (aquarium) , botany , chemistry , food science , biochemistry , mechanical engineering , ecology , chloroplast , organic chemistry , gene , engineering
Spinach plants were grown in hydroponic culture provided with variable limiting amounts of N. During a complete diurnal cycle, growth of the root and shoot parts, as well as levels of soluble and insoluble sugars and of free amino acids, were monitored. No clear relationship could be detected between the level of N feeding and the levels of free sugars and amino acids. Analysis of variance revealed that the variances in the relative growth rates of plant root and shoot could be correlated with the levels of sugars and amino acids. Root amino acid concentration could be correlated with shoot amino acid concentration and root sugar concentration. No relationship was found between the variances in root and shoot free sugar concentrations.