Abstract
Growth, photosynthesis, cation distribution and betaine accumulation in current year-old cuttings of Salix psammophila C.Wang et Ch.Y.Yang and S. matsudana Koidz. cultured hydroponically in 2/5 Hoagland solution containing 0，50，or 100 mM NaCl were investigated. The treatment of 100mM NaCl greatly suppressed growth and photosynthesis of both species. In both 50 and 100mM NaCl treatments, Na+ accumulation occurred in roots of both species. The accumulation of Na+ in leaves of 100mM NaCl treated S. matsudana cuttings was greater than that of S. psammophila cuttings. In leaves of both species, 100mM NaCl slightly increased glycine betaine content and 50mM NaCl enhanced β-alanine betaine increment. Effects of methyl jasmonate (MeJA) solution (0, 1, 5 or 10mM) sprayed to leaves on growth and physiology of the cultured cuttings also were studied. The application of MeJA solutions did not affect growth, physiology or bataine accumulation in both species.
