HEAVY-METAL (ZN, CD) TOLERANCE IN SELECTED CLONES OF DUCK WEED (LEMNA-MINOR)

被引：32

作者：

VANSTEVENINCK, RFM ^{[1
]}

VANSTEVENINCK, ME ^{[1
]}

FERNANDO, DR ^{[1
]}

机构：

[1] LA TROBE UNIV, DEPT BOT, BUNDOORA, VIC 3083, AUSTRALIA

来源：

PLANT AND SOIL | 1992年 / 146卷 / 1-2期

关键词：

CADMIUM; CLONES; HEAVY METAL TOLERANCE; LEMNA-MINOR; OXALATE; PHOSPHATE; PHYTIC ACID; PHYTOCHELATIN; SULFUR; X-RAY MICROANALYSIS; ZINC;

D O I：

10.1007/BF00012021

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Cryo-microprobe analysis of quench-frozen fronds of a Zn-tolerant clone of Lemna minor exposed to a high level of Zn (300 muM) showed the presence of cellular deposits consisting of Zn, Mg, K and P or Zn, K and P (Zn phytate). The same Zn-tolerant clone of Lemna minor, when exposed to a high level of Cd (30 muM), showed the presence of globular deposits consisting of Cd, K and P in mature fronds, but the immature cells of the enclosed daughter fronds contained relatively large deposits with Cd and S as the main components (Cd-phytochelatin?). Selection for Zn tolerance in a population of Lemna minor was easily achieved but selection for Cd tolerance has so far not been successful. The Zn-tolerant clone also tolerates high levels of phosphate.

引用

页码：271 / 280

页数：10

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