Growth of Tomato Roots as Influenced by Oxygen in the Nutrient Solution

Ethylene and Carbon Dioxide in the Growth and Development of Cultured Radish Roots

“…This was true for all ethylene concentrations tested. Stolwijk and Thimann (18) and others (6,8,14,19) (8,19). Just as in the case of root elongation, our results suggest that the antagonism of applied CO2 and endogenous ethlylene could be responsible for these observations.…”

“…Many re'ports have indicated that the presence of CO2 at such levels is stimulatory to root growth (6,8,14,18,19) but the mechanism of this response is not known. Such an alteration of root growth patterns by CO2 might result from an interaction with ethylene; and one can thus propose that, in such a sys,tem, CO2 acts to prevent inhibition of growth by ethylene.…”

Dark CO2 Fixation and its Role in the Growth of Plant Tissue

“…concenitrationls have stimulated the growth of Avciia mesocotyl and etiolated coleoptile (13. 14) and the root growth of cotton (11), tomatoes (5), and peas (6,24). This CO., stimulation may a be related to the biosynthetic role of the citric acid cycle (20 (12).…”

Effects of Oxygen and Carbon Dioxide Levels upon Absorption of Potassium by Plants.

“…Earlier work on the problem has been reviewed by Cannon and Free (6), Clements (8), Leather (18), and Parker (21), and the more recent literature by several writers (9,10,15,20,23,27,30). Most of the research on aeration suggests that plant roots are surprisingly tolerant of reduced 02 and high CO2 pressures.…”

“…Hoagland and Broyer (13) and others (3,25,26) have shown the importance of respiration and oxygen supply in certain types of mineral accumulation by plants. Chang and Loomis (7) and Vlamis and Davis (28,29) have shown that high concentrations of CO2 are injurious also, although the question of the relative importance of 02 deficiency and CO2 excess in field soils is not yet fully established (10,12,14,19,24,30).…”