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大豆科学  2009 

不同盐分胁迫对野生大豆种子发芽的影响

DOI: 10.11861/j.issn.1000-9841.2009.03.0461, PP. 461-466

Keywords: 野生大豆,盐胁迫,发芽率,发芽势

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Abstract:

一年生野生大豆是栽培大豆的野生近缘种和基因资源,具有耐盐碱、抗寒、抗病等优良性状。研究其种子萌发的耐盐性,为利用盐碱地资源和野大豆的引种驯化供依据。以山东德州一年生野大豆为材料,研究NaCl、Na2SO4、Na2CO3及三者的混合盐的胁迫对野大豆种子的发芽率、发芽势、发芽指数及胚生长的影响。随盐溶液浓度的增加,野大豆种子的发芽率、发芽速度、发芽指数均呈下降趋势,而低浓度的Na2SO4(10~50mmolL-1),Na2CO3(0~10mmolL-1)促进种子萌发,高浓度的NaCl(>200mmolL-1)、Na2SO4(≥200mmolL-1)、Na2CO3(≥75mmolL-1)抑制种子萌发;10mmolL-1Na2SO4处理下,其胚根胚轴长度都大于未经盐处理的,低浓度的盐分促进了胚根和胚轴的生长。结果表明低浓度的盐分促进一年生野生大豆胚的生长,野生大豆的胚根比胚轴对盐分更敏感。

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