Abstract:

Different hypocotyls of Bruguiera gymnorhiza from Qiongshan, Sanya, Wenchang, Fangcheng, Haikang, Gaoqiao and Futian were collected and cultivated in the same ecological environment at Futian, Shenzhen. And a year later, the morphology growth and the physiological indexes such as water content, chlorophyll, free proline, catalase, electrical conductivity, photosynthesis, transpiration, etc. were analyzed. The results showed that there were significant differences in survival rate, basal diameter growth and physiological indexes among the seedings from different provenances. Of all provenances tested, Gaoqiao, Qiongshan and Sanya provenances were better; the photosynthetic rate and transpiration rate for Qiongshan and Sanya provenances were higher, and lowest for Gaoqiao provenance; the relative electrical conductivity for Sanya, Wenchang and Futian provenances was higher, and lower for Haikang and Fangcheng provenances; the catalase activity for Futian provenance was highest, and the content of free proline for Gaoqiao provenance was highest. The provenance of Bruguiera gymnorhiza from Gaoqiao was best to be introduced to Shenzhen Bay by a coordinate-synthetic-evaluation way according to Shenzhen Bay's ecological environment.

Key words: Bruguiera gymnorhiza, Provenance, Seedling, Physiological-ecology, Shenzhen