BIOTIC STRESS TRIGGERS. “Genes of DHNs in fir-tree buds and stems were expressed in response to wounding, drought, and cold stress. Differential expression of DHN genes has been shown for maritime pine: a decrease in DHN gene transcript number was found in fir-tree buds and needles during bud burst. At the proteome level, DHN accumulation has been detected in response to drought in embryogenic cell lines of black spruce and seeds of Colorado pine.” (DHNs = Dehydrins).
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