Acta Botanica Croatica, Vol. 35 No. 1, 1976.
Izvorni znanstveni članak
Study of the Influence of Soil Drought and High Air Temperature on Some Physiological Processes in Maize Plant
Branislav Kerečki
; Srbija
Ljiljana Zarić
; Srbija
Danica Jelenić
; Srbija
Milutin Penčić
; Srbija
Sažetak
Crop injuries, which occur very often in our climatic conditions during the growing period, are due to high temperatures accompanied with relatively low air humidity.
The heat stress effects the greatest damage on the plant during the fertilization period. The aim of the research was to find out the effects of the heat stress on some physiological parameters.
An experiment was carried out with the maize hybrid, ZP 755, in the 8th phase of tassel development. The plants were grown in an open greenhouse in Mitcherlich pots, on the soil whose moisture contents was 30°/o—70°/o of the maximum water capacity. The heat stress was provoked in the heat stress chamber with the temperature of 44—46 °C, relative air humidity of 26% and wind velocity of 9 m/min.
Water fractions, intensity of transpiration, and concentration of cell liquid were determined only in the leaf of plants exposed to the heat stress, while nitrogen fractions were determined in leaf, stalk and root.
On the basis of results obtained it can be stated that the drought and heat stress cause considerable changes in all water and nitrogen fractions. The amount of bound water in treated plants increases while the amount of free water decreases. At the same time soluble and nonprotein nitrogen is increased and total nitrogen decreased in relation to the control plant.
Ključne riječi
Hrčak ID:
158070
URI
Datum izdavanja:
31.12.1976.
Posjeta: 784 *