[2H4]-Tauroursodeoxycholic Aci

Measuring Soluble Ion Concentrations (Na+, K+, Cl) in Salt-Treated Plants

. As these ions are not bound covalently to compounds in cells, they can be readily extracted with dilute acid. Na+ and K+ can be measured in a dilute nitric acid extract using a flame photometer, by atomic absorption spectrometry or by inductively coupled plasma

生理酸性盐（physiologically acid salt）

　　 指植物根系在某种盐溶液中，对其阳离子吸收的量大于阴离子时，造成溶液 pH值下降，则称该盐为生理酸性盐。例如，将植物培养在硫酸钾（ K2 SO4 ）溶液中，由于植物对钾的需要量大于对硫的需要量，因此，根系吸收 K 量较 SO2- 4 为多。为保持体内电性平衡，根细胞向外界分泌质子（ H ），使溶液中 H 增加， pH值下降。这是由于根系生理活动的结果，由此而得名。  

Quantification of Abscisic Acid, Cytokinin, and Auxin Content in Salt-Stressed Plant Tissues

Plant hormones cytokinins, auxin (indole-3-acetic acid), and abscisic acid are central to regulation of plant growth and defence to abiotic stresses such as salinity. Quantification of the hormone levels and determination of their ratios