Premium
Growth and accumulation of N, K + , Ca 2+ and Mg 2+ in barley exposed to various nutrient regimes and root/shoot temperatures
Author(s) -
Jensén Paul,
Perby Harald
Publication year - 1986
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1986.tb02438.x
Subject(s) - shoot , hordeum vulgare , nutrient , cultivar , chemistry , mineral , horticulture , botany , poaceae , agronomy , biology , organic chemistry
Six cultivars of spring barley ( Hordeum vulgare L. cvs Salve, Nümberg II, Bomi, Risø 1508, Mona and Sv 73 608) were grown in water culture for three weeks with various combinations of mineral supply and differential roots/shoot temperatures during the growth period. Most important for growth and accumulation of N, K + , Ca 2+ and Mg 2+ was the mineral supply, followed by the root temperature and the choice of cultivar. Treatments with low mineral supply or low root temperature induced a uniform reduction in growth and accumulation of the ions studied. The effects of low mineral supply and low root temperature on growth and N accumulation was additive, which indicates that these factors exert their influence independently of each other. Roots grown at 10°C were smaller and Rb + ( 86 Rb) influx was higher than in roots grown at 20°C. It is suggested that the control of Rb + ( 86 Rb) influx is affected by the root temperature and the age of the plants. The higher 86 Rb + ( 86 Rb) influx into the low temperature roots could not compensate for the smaller root size. However, the lower total mineral accumulation made up for the needs of the smaller plants and cannot explain the reduction in growth.