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首页> 外文会议>The 2nd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2008)(第二届生物信息与生物医学工程国际会议）论文集 >Difference of growth, copper accumulation and mineral element uptake in two Elsholtzia haichowensis populations under copper and mineral nutrition stress
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Difference of growth, copper accumulation and mineral element uptake in two Elsholtzia haichowensis populations under copper and mineral nutrition stress

机译：铜和矿质营养胁迫下两个海桐的生长，铜积累和矿质元素吸收的差异

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Two Elsholtzia haichowensis populations, one from a copper mine (CS) and the other from an uncontaminated site (UCS), were studied in hydroponic experiments for the plant growth, copper accumulation and mineral nutrients content under excess copper and nutrient deficiency conditions. The results indicated that the CS population had evolved not only Cu tolerance but also tolerance to low nutrient supply. Under Cu treatments, the CS population had less Cu accumulation in roots than the UCS one, suggesting the root exclusion mechanism existing in the former. It was also found that general nutrient deficiency markedly promoted Cu uptake and transport in the two populations. But CS population had less Cu accumulation than UCS population did. Under Cu stress, the CS population had less change in nutrient composition than the UCS one. The similar result was observed in general nutrient deficiency experiment. The results indicated that the mineral composition homeostasis under the stresses was important in metal tolerance and colonizing normally in the Cu-enriched soils for the Cu-tolerant population.
机译：在水培试验中研究了两个Elsholtzia haichowensis种群，一个来自铜矿（CS），另一个来自未受污染的土地（UCS），以研究过量铜和养分缺乏条件下的植物生长，铜积累和矿质养分含量。结果表明，CS种群不仅对铜的耐受性有所提高，而且对低养分供应的耐受性也有所提高。在铜处理下，CS群体的根中Cu积累量少于UCS群体，这表明前者中存在根排斥机制。还发现，一般营养素缺乏明显促进了这两个种群中的铜吸收和运输。但是CS种群的铜积累少于UCS种群。在铜胁迫下，CS种群的营养成分变化少于UCS种群。在一般的营养缺乏实验中也观察到了类似的结果。结果表明，胁迫条件下矿物质组成的稳态对金属耐受性和耐铜种群在富铜土壤中的正常定殖具有重要作用。

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