Osmolyte accumulation in leaves of Tamarix ramosissima growing under various soil conditions in the Colorado River basin

摘要: Tamarix ramosissima is a dominant species in desert riparian ecosystems the western USA. It phreatophytic halophyte, with salt glands on leaves. While osmoregulation essential for turgor maintenance under high salinity, dose–response relationship to salinity of various osmolytes plants still unknown. We profiled crude leaf extracts T. identify metabolic compounds that contribute its tolerance. compared cation, soluble sugar, amino acid, and betaine content among samples from five points along Colorado River. The sodium trees increased increasing soil salinity. Under conditions, sugar did not increase, but acids did. increase proline accumulation was highly positively correlated content. Thus, appears be osmolyte accumulates response severe stress areas