| 马尾松苗期体内铝离子存在方式、形态和分布 |
| 摘要点击 668 全文点击 838 投稿时间：1991-12-15 |
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| 中文关键词 马尾松 铝离子 形态 分布 |
| 英文关键词 masson pine aluminum existing pattern ionic forms distribution |
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| 中文摘要 |
| 本文用溶液培养方法研究铝在马尾松幼苗体内的存在方式、形态及其分布。结果表明,①松苗吸收的铝主要积累于根部,只有较少量的铝转移至地上部分;②针叶内铝离子主要以束缚态的方式存在,根内束缚态与自由态的存在比例大致相当;③铝离子在表面自由空间大部分以三价铝离子的形态存在,其中针叶内约占63～85%,根内占41—67%;④铝离子在根组织内的含量以外皮层为最高,中柱最低,呈现为从内向外增多的分布状态. |
| 英文摘要 |
| Using a hydroponic system, existing pattern, ionic forms and distribution of aluminum in masson pine seedlings were studied. Results show that: (1) Most of the aluminun absorbed by the pine seedlings accumulated in the roots and only a little of the aluminun was translocated to the shoots; (2) Majority of the aluminun in the shoots were bound, but there was only little difference in the amount of free and bound aluminum in the roots; (3) The dominant ionic form of aluminum in surface free space was AL3+ which accounted for about 63-85% of the total in the shoots and 41-67% in the roots; (4) In the roots, most of the aluminum existed in the epidermis of plant tissue and a little was found in the stele, showing an increasing tendency from the inside to the outside of plant tissues. |
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