Abstract: Studies on the growth and metabolism of Aneurolepidium chinense seedlings show that under NaCl stress, their growth is inhibited, while the relative permeability of leaf cell membrane is increased, which induces the accumulation of inorganic Na⁺ in leaf. The leaf content of proline is increased, but that of chlorophyll is decreased. External ABA can promote the uptake of K⁺ by A.chinense,but inhibit the uptake of Na⁺, weaken the toxicity of Na⁺, enhance the stability of leaf cell membrane and the photosynthetic capacity and permeability regulation ability of leaf, and increase the activity of plant growth and metabolism and the content of chlorophyll.

Key words: NaCl stress, Physiological response, ABA treatment, Aneurolepidium chinense, symbiotic coral, heterotrophic nutrition, molecular nutrition markers