21 February, 1993 Message to Forestry Net regarding Salinity tolerance of Pinus. I am working with a hydroponic culture system to investigate mechanisms of metal stress tolerance in Pinus taeda and Pinus elliottii. One of the concerns we have is that of inadvertent chloride toxicity associated with the salts with which we are adding the metals. However, I have had little luck finding much literature on chloride toxicity or even salinity that is appropriate for Pinus. I have found some research on simulated saltwater inundations and some work on hydroponic testing of horticultural and crop plants (e.g., Citrus) for sodium chloride toxicity. Is anyone aware of research that would address the levels of chloride (Cl-) required for toxicity to Pinus, or conifers, in solution culture? Thanks in advance for your consideration of this question. Alexander L. Friend Assistant Professor of Forestry Mississippi State University Internet: alf2@Ra.MsState.Edu
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