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作物体内における重金属元素の挙動に関する研究 <特別寄稿＞
http://hdl.handle.net/10076/5519
http://hdl.handle.net/10076/55192a25113c-c28c-43db-8dc8-cd8b1a0f85b2
| 名前 / ファイル | ライセンス | アクション |
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AN002343370006701.pdf (1.2 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||
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| 公開日 | 2007-07-05 | |||||||||
| タイトル | ||||||||||
| タイトル | 作物体内における重金属元素の挙動に関する研究 <特別寄稿＞ | |||||||||
| 言語 | ja | |||||||||
| 言語 | ||||||||||
| 言語 | jpn | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | departmental bulletin paper | |||||||||
| 著者 |
北岸, 確三
× 北岸, 確三
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | l．ln1959,comparative studies on the response of rice plants to toxic levels of manganese,cobalt,nickel,zinc,copper and cadmium were started using an emission spectrophotograph.Toxic order of these heavy metal elementswas：copper,cadmium＞nickel＞cobalt＞zinc＞manganese.Mechanisms of grain yield reduction resulting from theapplication of toxic levels of tbese heavy metal elements were elucidated. 2．Next,a series of methods were proposed for the characterization of trace amounts of heavy metal elements inplant tissues by using atomic absorption spectrometry and radioisotope technique for metal detection. 3．Microdistribution and chemical form of cadmium in polluted rice grains were examined by the above mentioned techniques．More than 80% of cadmium in a grain were found in endosperm,edible part of rice grain. Cadmiumin endosperm was found to occur chiefly in the form of cadmium－glutelin complex. 4．Then,Studies were conducted concerning the behabior of zinc at normal levels within rice plants. Characteristicfeatures of the behavior of root-fed zinc were as follows . 1)Zinc absorbed by roots and then transported in the xylem, was retrieved from the transpiration stream before reaching at the leaves , high in the transpiration activity,and then actively transported to the sink reｇions aｔ that time；i.e,active meristems of the developing leaves,panicleprimordia,developing rice grains and so on. 2）The main site of the retrieval exists and actively operates in thenodes to which photosynthetically active leaves are attachcd.The short－cut pathway of zinc in the node was elucidated by means of semimicroautoradicgraphy on the base of the recent information obtained by Kawahara et al.concerning the microstructure of the node of rice plants. 5．Comparative studies were conducted concerning the behavior of root-fed cadmium at relatively low levels andthat of zinc at normal leveles within rice plants. Althogh most of the root-fed cadmium were firmly held by theroots, the behavior of the trace amounts of cadmium, transported in the xylem, was similar totbat of zinc.Thecapacity of the retrieval mechanism in the node was fairly high for cadmium, too. Based on the results obtaimedfoom the tracer experiments conducted at the early ripening stage, we deduced that mecbanisms, operating in thenodes in collecting trace amount of essential zinc from the transpiration stream and in transporting them activelyto the sink regions, cannot discriminate cadmium from zinc, thus contributing to the accumulation of nonessentialcadmium in rice grains． 6．Physiological role of zinc, remarkably accumulated in meristems, was examined. When the concentration ofzinc in apical meristems was reduced to the levels less than 100ppm, the amount of 80S ribosomes in cytoplasmdecreased remarkably, followed by rapid decrease in the amount of soluble proteins, suggesting that zinc contributesto the integrity of 80S ribosomes, the site for protein synthesis in cytoplasm. Further investigations are now beingcarried out concerning the effect of zinc deficiency on the transcription process of genetic information. |
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| 書誌情報 |
三重大學農學部學術報告 = The bulletin of the Faculty of Agriculture, Mie University 巻 67, p. 1-15, 発行日 1983-12-01 |
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| ISSN | ||||||||||
| 収録物識別子タイプ | PISSN | |||||||||
| 収録物識別子 | 0462-4408 | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AN00234337 | |||||||||
| フォーマット | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | application/pdf | |||||||||
| 著者版フラグ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| その他のタイトル | ||||||||||
| 言語 | en | |||||||||
| 値 | Studies on the Behavior of Heavy Metal Elemens in Crops | |||||||||
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| 出版者 | 三重大学農学部 | |||||||||
| ノート | ||||||||||
| 値 | Agropedia提供データ | |||||||||
| 資源タイプ（三重大） | ||||||||||
| 値 | Departmental Bulletin Paper / 紀要論文 | |||||||||
