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Changes in Endogenous Abscisic acid Content and Germination Ability of Acer mono Seeds during Seed Development and Cold Stratification

发育和冷层积过程中色木槭种子发芽能力与ABA含量的变化


Immature seeds during developmental period and dormant seeds during cold stratification were used to investigate the changes in germination ability and endogenous abscisic acid (ABA) content of Acer mono seeds. The results showed that the seeds of A. mono finished the nutrient accumulation and entered into rapid dehydration stage from 100 d after flowering. Germination ability and endogenous ABA content of A. mono seeds increased with the decrease of the seed moisture content. The seed germination percentage was just 32.7% at 120 d after flowering (fructify stage) but increased to 75.0% after 80 days of cold stratification. The ABA content of A. mono seeds decreased significantly with the prolongation of cold stratification. The present study suggested that the dormancy of A. mono seeds is strongly dependent on the ABA levels. The synthesis of ABA in A. mono seeds decreased and seed germination ability enhanced after cold stratification.


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