cje
Previous Articles Next Articles
YU Xiao-jun1**, XU Chang-lin1, WANG Fang2, JING Yuan-yuan1, DUAN Chun-hua1, WANG Gen1, SHENG Fang1
Online:
Published:
Abstract: In order to clarify the dormancy mechanisms of Anemone rivularis seed and find better methods for breaking seed dormancy to provide a basis for cultivation for medicinal plants of A. rivularis, the efficacy of a series of treatments on seed germination and dormancybreaking of A. rivularis were assessed when compared with the untreated achene (CK). Soaking for 3-5 h with 40-50 g·L-1 NaOH solution failed to break the dormancy of A. rivularis achenes. After 2 months of storage, the percentages of germination of the achenes with the head or the entire seedcase being removed were 3.3% and 6.2% (P>0.05), respectively, when cultivated without light but 38.7% and 76.0% (P<0.05), respectively, when cultivated with light. Cutting off the bottom of the achene made no difference, irrespective of cultivation with or without light. The germination of A. rivularis seed after partial seedcase removal (from 1/5 to 1/4) reached 62.7% and was significantly higher than that of CK (P<0.05). The germination of A. rivularis seed after seedcase puncture treatment was also significantly improved by 19.3% (P<0.05) but was less effective than that when the seedcase was totally or partially removed (P<0.05). There was no significant allelopathic effect of aqueous extract liquid of A. rivularis seedcase on the seed germination of A. rivularis. Soaking in GA3 solution with concentration of 10-30 g·L-1 for 10 h did not improve the germination of A. rivularis achene. The highest germination percentage of the A. rivularis seed was found at temperature alternating between 25 and 15 ℃ (with durations 8 and 16 h, respectively). There was no seed germination at temperature alternating between 15 and 5 ℃ or 10 and 5 ℃. Our results suggest that seedcase blocks the light, causing the dormancy of A. rivularis seed. Removing the seedcase could break the seed dormancy of A. rivularis effectively. However, some seeds still remain dormant after the seedcase is removed. Therefore, the dormancy type of A. rivularis seed (achene) is combinational (physical dormancy + physiological dormancy).
Key words: runoff., biological soil crust, surface roughness, revegetated grassland, infiltration
YU Xiao-jun1**, XU Chang-lin1, WANG Fang2, JING Yuan-yuan1, DUAN Chun-hua1, WANG Gen1, SHENG Fang1. The causes of Anemone rivularis seed dormancy and the methods for breaking dormancy.[J]. cje.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: https://www.cje.net.cn/EN/abstract/abstract21274.shtml
https://www.cje.net.cn/EN/Y2014/V33/I1/65