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标题：Pre-germination hydration affects seed performance in bambara groundnut
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作者：Albert T. Modi
期刊名称：Scientific Research and Essays
印刷版ISSN：1992-2248
出版年度：2013
卷号：8
期号：21
页码：940-945
DOI：10.5897/SRE2013.5391
语种：English
出版社：Academic Journals
摘要：In a study to determine the response of local bambara groundnut (Vigna subterranea (L.) Verdc.) germplasm to seed enhancement, seeds were subjected to hydration (12, 75 and 93% RH) to influence pre-germination water activity (aw) and subsequent germination and seedling establishment. This study also reports on seedling characteristics 28 days after sowing under a controlled environment at 75% field capacity. There were highly significant (P < 0.01) differences between hydration treatments. The low RH resulted in aw ranging from 0.06, 1 h after suspension to 0.39, 72 h after suspension, whereas the 93% RH resulted in awranging from 0.2, 1 h after suspension to 0.68, 72 h later. Subjecting seeds to pre-germination hydration caused a significantly improved seed imbibition (P < 0.05) (up to 40%), germination (35%) (P < 0.05) and seedling establishment (P < 0.05) (as indicated by seedling size and utilization of seed storage tissue). It is concluded that the delay in seedling establishment due to lack of pre-germination hydration or low RH (12%) is linked to the observed collapse of seedling leaf stomata. Hence, the findings of this study have a bearing on drought tolerance.
关键词：Hydration; germination; seed; water activity