Rooting responses of three oak species to low oxygen stress
| Title | Rooting responses of three oak species to low oxygen stress |
| Publication Type | Audiovisual |
| Year of Publication | 1997 |
| Authors | Jacobs, K. A., Berry A. M., MacDonald J. D., & Costello L. R. |
| Series Editor | Pillsbury, N. H. |
| Series Title | PROCEEDINGS OF A SYMPOSIUM ON OAK WOODLANDS: ECOLOGY, MANAGEMENT, AND URBAN INTERFACE ISSUES |
| Publisher | US DEPT AGR, FOREST SERV PACIFIC SW FOREST & RANGE EXPTL STN |
| City | PO BOX 245, BERKELEY, CA 94701 USA |
| Abstract | Rooting characteristics were compared in blue (Q. douglasii), valley (Q. lobata), and cork oak (Q. suber) seedlings under hypoxic (low oxygen) conditions. A 50 percent reduction in root growth occurred in all species at an oxygen level of 4 percent, or an oxygen diffusion rate of 0.3 mu g cm(-2)min(-1). Blue oak formed few lateral roots regardless of oxygen level, but valley and cork oak root production decreased under hypoxic conditions. Four percent soil oxygen might be viewed as a minimum requirement for sustaining root growth of oaks in the field, and differences in root branching morphology may be correlated with tolerance of root hypoxia. |
