【摘要】 以耐性水稻(Oryza sativa L.)品种Azucena为实验材料,研究高Fe2+胁迫下,0～10mm段幼苗根尖铁的分布,以及根尖细胞亚显微结构变化情况。结果表明,400μmol/LFe2+处理下,0～2mm段根尖铁含量最高;随着Fe2+浓度的升高,根尖边缘细胞(BC)铁含量呈递增趋势。电镜观察发现,400μmol/LFe2+处理下,BC内出现大量碎片,受损明显,而根冠细胞主要表现为细胞壁增厚、细胞内出现许多小液泡。更多还原

【Abstract】 With rice (Oryza sativa L) variety Azucena(Fe2+-tolerance) as materials to study the Iron-distribution of root tip and ultrastructural Changes under excessive Fe2+ Stress.The results showed that the iron content was the highest in the 0-2 mm root tip treated by 400 μmol/L Fe2+.With the addition of Fe2+ concentration,the iron content of border cells( BC) became higher.Electron microscopic investigating found that BC was destroyed and much fragment could be seen in it at 400 μmol/L Fe2+ treatment,but the root cap cell mainly behaved cell wall became thicker,and appeared many small vacuoles.更多还原