Evaluation of Cold Resistance and Physiological Mechanism of Seven Manglietia Species
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    Abstract:

    In order to establish a comprehensive evaluation system for cold resistance of Manglietia species, the key physiological indexes of cold tolerance in seven cutting seeding were determined under low temperature. The fitting logistic equation was used to calculate the semi-lethal temperature of low temperature (LT50), and the key indexes of cold resistance were screened and evaluated by membership function method. The results showed that the LT50 of seven Manglietia species were in the order of M. fordiana < M. insignis < M. nucifera < M. patun-gensis < M. conifer < M. paruicula < M. crassipes, which had positively significant correlation with relative conductivity. With the temperature decrease, the contents of free proline and soluble protein, activities of superoxide dismutase and superoxide dismutase in seven Manglietia species fall after rising, while contents of soluble sugar and malondialdehyde increasing and gradually leveling off. The cluster analysis showed that 7 Manglietia species could be divided into 3 groups, cold resistance of Manglietia fordiana and M. insignis were stronger, M. nucifera, M. patungensis and M. conifera were medium, M. paruicula and M. crassipes were weak.

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黄一波,汪结明,李瑞雪,向言词,宋禹,颜玲玉.7种木莲属植物抗寒性评价及其生理机制[J].热带亚热带植物学报,2021,29(5):519~529

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History
  • Received:December 03,2020
  • Revised:March 01,2021
  • Adopted:
  • Online: September 23,2021
  • Published: