Scientia Agricultura Sinica ›› 2005, Vol. 38 ›› Issue (02): 376-382 .

• HORTICULTURE • Previous Articles     Next Articles

Physiological Mechanism of Metabolism of Carbohydrate, Phenols, Free Amino Acid and Endogenous Hormones in Middle Scales of Lilium davidii var. unicolor Bulbs Stored at Low Temperature for Dormancy Release

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  1. 沈阳农业大学园艺学院， 沈
  • Received:2004-05-28 Revised:2004-09-27 Online:2005-02-10 Published:2005-02-10

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Abstract: Changes in carbohydrate, phenols, free amino acids and endogenous hormones in middle scales of Lilium davidii var. unicolor bulbs stored in moist sawdust for 101 days at 2℃, 6℃ and 10℃, respectively, were studied. Results indicated that starch content and ABA level decreased markedly along with decline of storage temperature and prolonging of duration, and total soluble sugar content，phenols content, GA3 and IAA concentration increased sharply. Notable changes of above substances occurred at earlier phase (34 d). Correlation analysis revealed that increase of amylase activity and PAL activity conduced to increase of total soluble sugar content and phenols content, respectively. As a general tendency, free amino acid content decreased, and arginine content was the highest and its changes were dramatic among all kinds of free amino acids. According to results of stepwise regression analysis and path analysis, it is concluded preliminarily that the metabolism in middle scales may be regulated mainly by endogenous GA3.

Key words: Lily (Lilium davidii var. unicolor), Dormancy, Carbohydrate, Phenols, Free amino acid, Endogenous hormones

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