Abstract
Under artificial drought environment, membrane permeability, malondialdehyde (MDA) content and free proline (Pro) content of three cultivars of gazania were studied as well as the relation between the three physiological indexes and drought resistance. The results showed that: there existed significant positive correlation between relative conductivity and drought resistance in ‘Hongwen’; while ‘Xingbai’ and ‘XH’ showed the reverse result. The correlation between Pro content and drought stress treatment days in the three cultivars were significant positive. However, the correlation between MDA content and drought stress treatment days in the three cultivars were not the same. Therefore, Pro content can be chose as a physiological indicator to evaluate drought resistance in gazania.
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