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珙桐种子层积过程中抑制物活性的变化(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2016年03期
Page:
188-192
Column:
研究简报
publishdate:
2016-05-18

Article Info:/Info

Title:
Changes of inhibitory activity during stratification in Davidia involucrata seeds
Article ID:
1000-2006(2016)03-0188-05
Author(s):
QIAN Cunmeng JIANG Zhou ZHOU Jian DAI Song SU Youyi LI Shuxian*
Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China
Keywords:
Davidia involucrata seed bioactivity of inhibitors stratification dormancy
Classification number :
S722
DOI:
10.3969/j.issn.1000-2006.2016.03.031
Document Code:
A
Abstract:
In order to know location of inhibitory substances in Davidia involucrata seeds and changes of inhibitory activity during stratification, activities of extracting solutions of D. involucrata seeds were studied after stratification for 12 and 16 months. Extracting solutions of endocarps, seed endosperms and embryos(kernel)in D. involucrata were prepared by using methanol and acetone as extracting solvents. The results indicated that germination inhibitors existed in both kernel and endocarp of D. involucrata and with the increase of concentration of extracting solutions, activities of inhibitors increased too. But the inhibitory activities of kernel extracting solution were significantly higher than that of endocarp extracting solution. Besides, methanol extracting solution of seed kernel was at a higher level of inhibitory activities than that of acetone extracting solution, while no significant difference was presented in endocarps by the two extracting solutions. The inhibitory activities in seeds were decreased markedly after cold stratification for 12 months and then variable temperature stratification for 4 months. However, at this moment, germination index of cabbage seeds treated with 0.09 g/mL methanol extracting solution of seed kernel was still significantly inhibited, which indicated that some inhibitors in D. involucrate seed kernel remained strong inhibitory activity after stratification for 16 months.

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Last Update: 2016-06-30