Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/3/2004
Publication Date: 11/1/2004
Citation: Loffredo, E., Palazzo, A.J., Senesi, N., Clapp, C.E. 2004. Seed germination and seedling early growth of three native american species as affected by soil, peat and leonardite humic acids under controlled conditions in climatic chamber. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 3491. Interpretive Summary:
Technical Abstract: The effects of soil, peat and leonardite humic acids (SHA, PHA, and LHA,respectively) from the IHSS collection at a concentration of 10, 50 and 200 mg/L were studied on seed germination (for 10 days) and seedling early growth (on Nitch nutrient solution for 30 days in a Phytotron chamber under controlled temperature, humidity and illumination) of western wheatgrass, bluebunch wheatgrass and basin wildrye. The effects measured varied as a function of HA type and concentration and plant species. The germination percentage of bluebunch wheatgrass was increased by any HA at any concentration, whereas that of western wheatgrass only by PHA and LHA. The primary root length of basin wildrye was increased by any HA at any concentration, whereas that of western wheatgrass only by SHA and PHA at a concentration of 50 mg/L. The root length and dry weight of western wheatgrass and only root length of bluebunch wheatgrass were increased by any HA at any concentration. The shoot weight of basin wildrye was increased by PHA and LHA at any concentration. The LHA at any concentration increased the shoot and root weights of any species. The LHA appeared the most effective in promoting seed germination and seedling early growth of the three species examined, wheres among these, western and bluebunch wheatgrasses were the most affected by the presence of HA in the germination and growth media.