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Effect of Oxygen and Carbon Dioxide Concentration on the Germination of Range Grasses 1
Author(s) -
Dasberg S.,
Enoch H.,
Hillel D.
Publication year - 1966
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1966.00021962005800020027x
Subject(s) - germination , oxygen , carbon dioxide , respiration , agronomy , chemistry , biology , botany , ecology , organic chemistry
Four range grass species— Oryzopsis holciformis , Phalaris tuberosa , Agropyrum desertorum (Nordan and Fairway), and Agropyrum elongatum —as compared to wheat were germinated in atmospheres containing different concentrations of oxygen and carbon dioxide. The grasses, in the absence of CO 2 , showed significant decreases in the time rate of germination and in the final germination percentage over the whole range of oxygen concentrations tested; whereas wheat showed only a slight delay in germination with decreasing oxygen concentrations. The initial (imbibitional) water uptake of all plants was not affected by oxygen concentrations, while the CO 2 production (respiration) decreased at low O 2 concentrations at this stage. Subsequently, the seed water uptake was parallel to the germination response. The effect of CO 2 (O — 15%) on germination was slight as compared to the oxygen effect.