Abstract: Stomatal conductance is a key indicator in evaluating the balance and cycle of heat, H₂O and CO₂ fluxes between vegetation-atmosphere interface, and its simulation is a basis for discussing the heat and H₂O transfer in soil-vegetation-atmosphere continuum system. The study on the scaling and cumulative effect of stomatal conductance between leaf, canopy and regional scales is helpful to better understand the heat and H₂O transfer processes between vegetation-atmosphere interface, and to properly evaluate the status and functions of vegetation in land surface processes. In this paper, the recent studies on stomatal conductance modeling at leaf level, cumulative effect of stomatal conductace at canopy level, scaling from canopy to regional scale, and functions of cumulative effect of stomatal conductance in land surface processes modeling were summed. The problems exsisting in related studies, such as heterogeneities, were pointed out, and the multi-scale synchronous observations that should be emphasized in the future studies were discussed.

Key words: Glycine soja, Glycine max, Salt stress, Polyamines(PAs), Polyamine oxidase(PAO) activity, Salt tolerance