Effect of cold stratification on dormancy and germination of four Carex species seeds

Abstract

Abstract: The effect of cold stratification on dormancy and germination of four Carex species seeds were studied. The germination percentage (GP), germination index (GI), endogenous hormone content, and soluble sugar and starch were measured to explore the causes of dormancy. Stratification treatment elevated GP and GI of the seeds. The GP of C. humilis var. nana and of C. lanceolata seeds increased from 34% to 84% and from 40% to 81%, respectively and the GI of C. breviculmi and C. giraldiana seeds increased from 7.88 to 18.15 and from 2.86 to 5.20, respectively. High levels of endogenous ABA content may be an important factor for Carex seed dormancy. Soluble sugar content positively correlated with GI.

CLC Number:

Q945.35

LUO Xian, PAN Yuan-zhi, YANG Xue-jun, WU Ju-ying, TENG Weng-jun, FAN Jun-gang. Effect of cold stratification on dormancy and germination of four Carex species seeds[J]. Acta Prataculturae Sinica, 2010, 19(3): 117-123.

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