| 聚乙二醇造成的水分胁迫对水稻根系生长的影响 |
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| 引用本文： | 高志红,陈晓远.聚乙二醇造成的水分胁迫对水稻根系生长的影响[J].华北农学报,2009,24(2). |
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| 作者姓名： | 高志红 陈晓远 |
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| 作者单位： | 韶关学院,英东生物工程学院农业科学系,广东,韶关,512005 |
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| 摘 要： | 为分析根系特征与水稻适应水分胁迫的关系,以水稻(Oryza sativa L.)品种金优402为研究材料,用营养液培养方法,研究聚乙二醇(PEG)造成的水分胁迫对植物根系生长的影响.结果表明,经PEG-6000 50 g.L处理5 d的植株,其根干质量和活跃吸收面积增加,直径变粗,鲜质量、相对含水量和根长下降.+PEG处理的根活跃吸收面积比对照平均高6%,最多高47%.水分胁迫对根表面积和分形维数的影响比较复杂.水分胁迫前期根表面积下降,后期根表面积上升并超过对照.水分胁迫1 d后,根分形维数迅速上升并超过对照,水分胁迫5 d后又下降到对照以下,水分胁迫解除后,再次上升.根表面积与根干质量之间呈极显著正相关;根活跃吸收面积与根系相对含水量呈极显著正相关.
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| 关 键 词： | 水稻 根系 聚乙二醇 水分胁迫 |
Effects of Polyethylene Glycol Induced Water Stress on Root Growth of Rice |
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| GAO Zhi-hong,CHEN Xiao-yuan.Effects of Polyethylene Glycol Induced Water Stress on Root Growth of Rice[J].Acta Agriculturae Boreali-Sinica,2009,24(2). |
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| Authors: | GAO Zhi-hong CHEN Xiao-yuan |
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| Institution: | Yingdong College of Bioengineering;Shaoguan University;Shaoguan 512005;China |
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| Abstract: | A solution cultivation experiment was conducted to study the effects of water stress on root growth of rice(Oryza sativa L.)variety Jingyou 402 cultivated in water stress condition simulated with PEG 50 g/L.The results obtained were as follows:Root dry weight,root diameter and active absorption surface area increased,root fresh weight,relative water content,and length decreased in 5-days water stress.Root active absorption surface area of+PEG treatment was on average 6%,and the highest 47% higher than contr... |
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