Interaction of Salt Stress and Photoinhibition on Photosynthesis in Barley and Sorghum

摘要: Summary The effect of salinity (short term), high light and interaction the two was investigated in leaves isolated chloroplasts from these barley (C3) sorghum (C4) plants. saturated rate CO 2 uptake maximum quantum yield decreased with increasing salt concentrations. Stomatal conductance more sensitive to stress than photoinhibition. Photoinhibition treatment stressed plants resulted a further decrease assimilation efficiency photosynthesis. recovery considerably lower compared which were given photoinhibition only (no salt). It is concluded that itself does not exert adverse effects on primary photosynthesis process since F v /F m ratio electron transport activity did higher However, enhanced substantially susceptibility photoinhibition; this may be due predisposing photosynthetic apparatus damage under stress, resulting rates ability recover photodamage.