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Effect of Soil Gas Composition and Flooding on Growth of Nicotiana tabacum L 1
Author(s) -
Williamson R. E.
Publication year - 1970
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/agronj1970.00021962006200010026x
Subject(s) - nicotiana tabacum , shoot , flooding (psychology) , horticulture , solanaceae , chemistry , nutrient , agronomy , botany , biology , psychology , biochemistry , organic chemistry , gene , psychotherapist
The responses of Nicotiana tabacum L. to flooding and to soil treatments consisting of combinations of O 2 , CO 2 ) and N, gases were determined from leaf area and plant height changes and from final root weights. Leaf area and plant height were measured before treatment and after a 5‐day recovery period following treatment; root weights were obtained after the recovery period. The plants were grown in acrylic containers of soil located in an artificially lighted, controlled environment room. Flooding and pure N 2 treatments for 24 hours almost prevented further growth. After 48‐hour treatments with pure N 2 and flooding, roots and shoots were almost dead. Growth of plants treated with 1% O 2 or 1% O 2 + 20% CO 2 was significantly less than that of the control. The 1% O 2 + 20% CO 2 treatment reduced leaf growth significantly more than did 1% O 2 . Although 1% O 2 and 1% O 2 + 20% CO 2 caused injury, plants treated with these gaseous mixtures exhibited near normal growth at the end of a 5‐day recovery period. Permanent injury of tobacco by flooding is primarily due to lack of O 2 in the root zone and not to excess CO 2 . Results obtained in the soil system were similar to those previously obtained in spray nutrient solution culture.