Methodological and Physiological Study during Seed Dormancy Release of Symplocos paniculata

Area of Science:

• Plant Science
• Horticulture
• Seed Biology

Background:

• Seed dormancy in Symplocos paniculata hinders its cultivation and widespread use.
• Effective dormancy breaking methods are crucial for improving S. paniculata propagation.

Purpose of the Study:

• To establish a comprehensive method to overcome seed dormancy in Symplocos paniculata.
• To investigate the physiological and biochemical changes during dormancy breaking.

Main Methods:

• Seeds were treated with 98% H2SO4 scarification, 1000 mg·L-1 GA3 soaking, and 4 °C stratification for 100 days.
• Analyzed changes in stored substances (proteins, sugars, starches, fats), enzyme activities (amylases, peroxidase, catalase), and endogenous hormones (ABA, GA3, IAA).

Main Results:

• The optimized method achieved a peak seed germination of 42.67%.
• Starch and fat degradation occurred, while protein and soluble sugar levels fluctuated, supporting energy metabolism.
• Decreased ABA content and increased GA3 and IAA levels correlated with successful germination.

Conclusions:

• The study elucidated the dormancy mechanism of S. paniculata seeds.
• An effective dormancy release protocol was developed, paving the way for improved cultivation.