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汪秀芳, 邢伟, 萧蒇, 王海宾, 周雯, 刘贵华. 湿地植物普通野生稻和慈姑之间的化感作用[J]. 植物科学学报, 2011, 29(3): 307-311.
引用本文: 汪秀芳, 邢伟, 萧蒇, 王海宾, 周雯, 刘贵华. 湿地植物普通野生稻和慈姑之间的化感作用[J]. 植物科学学报, 2011, 29(3): 307-311.
WANG Xiu-Fang, XING Wei, XIAO Chan, WANG Hai-Bing, ZHOU Wen, LIU Gui-Hua. Allelopathic Interactions between Two Wetland Species:Sagittaria trifolia and Oryza rufipogon[J]. Plant Science Journal, 2011, 29(3): 307-311.
Citation: WANG Xiu-Fang, XING Wei, XIAO Chan, WANG Hai-Bing, ZHOU Wen, LIU Gui-Hua. Allelopathic Interactions between Two Wetland Species:Sagittaria trifolia and Oryza rufipogon[J]. Plant Science Journal, 2011, 29(3): 307-311.

湿地植物普通野生稻和慈姑之间的化感作用

Allelopathic Interactions between Two Wetland Species:Sagittaria trifolia and Oryza rufipogon

  • 摘要: 普通野生稻(Oryza rufipogon)是现代水稻遗传育种的基础,已被列为濒危植物。本研究在实验室检测了普通野生稻与其常见伴生种慈姑(Sagittaria trifolia)之间的化感效应。研究发现普通野生稻和慈姑的根、茎、叶水浸出液对两物种的种子萌发和幼苗生长具有促进作用。普通野生稻种子经慈姑叶和普通野生稻根、茎和叶的水浸出液处理后,萌发率由对照的25%显著提高至39%~54%;慈姑种子经普通野生稻和慈姑各部分水浸出液处理后,萌发率由对照的不萌发提高至9%~81%。慈姑和普通野生稻各部分的水浸出液显著促进两者的幼苗伸长,但对根的生长表现出两种不同的效应:慈姑叶、叶柄和根的水浸出液以及普通野生稻叶的水浸出液对普通野生稻和慈姑根的生长具有抑制作用,而普通野生稻茎和根的浸出液促进慈姑根的生长。总体上,慈姑比普通野生稻对水浸出液更敏感。

     

    Abstract: Wild rice,Oryza rufipogon,is the presumed ancestor of Asian cultivated rice,O.sativa,and is the most important genetic resource for rice improvement.Aqueous leachates of leaf,stem,and root parts of Sagittaria trifolia and O.rufipogon were made to determine the effects on their seed germination and seedling growth.All aqueous leachates significantly promoted seed germination of S.trifolia and O.rufipogon when compared with distilled water control.The seed germination of O.rufipogon significantly increased from 25% under control to 39%-54% with the application of aqueous leachates of leaf of S.trifolia,and leaf,stem and root plant part of O.rufipogon,respectively.The seed germination of S.trifolia significantly increased from 0 under control to 9%-81% with the application of aqueous leaf,stem and root leachates of S.trifolia and O.rufipogon,respectively.Aqueous leachates of all plant parts had a strong promotion effect on shoot elongation of both species seedlings.The leaf leachates of O.rufipogon,and leaf,stem and root of S.trifolia had a strong inhibitory effect on root elongation of both species seedlings,while the stem and root leachates of O.rufipogon had a strong promotion effect on root elongation of S.trifolia.It was apparent that S.trifolia was more susceptive to allelopathic effects than O.rufipogon.Seedling root length may be the strongest morphological trait for allelopathic assessment of wetland plants.The results from this study suggest that allelopathy may play an important role in protection of endangered species.

     

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