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Seedling Development of Maize Genotypes at Constant and at Fluctuating Temperatures
Author(s) -
Stamp P.
Publication year - 1987
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1987.tb00276.x
Subject(s) - seedling , biology , tropics , agronomy , subtropics , horticulture , botany , ecology
Four maize genotypes from North West Europe, tropical highlands and tropical lowlands were grown at constant temperatures (14°C; 24°C), diurnal temperature variations (18°/10°C; 28°/20°C) and at temperatures alternating every three days (18°+ 10°C; 28°+ 20°C) until the three leaves stage. Fluctuating temperatures were generally favourable for growth with most marked effects at an average of 14°C when 18°/10°C were applied. Temperature situation had pronounced effects on morphological and biochemical traits like area of second leaves and activity of phosphofructokinase but between these traits and growth rates no close relationship existed. For all traits genotype specific reaction patterns to temperature situation existed. One tropical highland variety excelled by fast growth, especially at low fluctuating temperatures. A specific chilling susceptibility of the tropical lowland variety was only marked for growth at constant 14°C.