Abstract:

The changes of physiological indexes of Primula forrestii were investigated, which were treated with 10%, 15% and 20% PEG-6000 solution for 24 hours, and of which the one treated under 15% PEG stress were re-watered at different time. In the experiments, chlorophyll, soluble protein, malondianldehyde (MDA), proline contents in leaves and relative conductance rate of leaves were determined. With the prolonging of drought stress, in all the three PEG treatments, the content of chlorophyll in leaves decreased continuously, and soluble protein contents first increased steadily then decreased, while MDA and proline contents increased. In 20%PEG treatment, the plants could recover rapidly within 8 h, whereas after 12 h treatment, all the physiological indexes recovered slowly, so that 12 h was the turning point of Primula forrestiis recovery．

Key words: Primula forrestii, physiological indexes, drought stress