多环芳烃(PAHs)是由2个或者2个以上苯环组成的一类复杂烃类,它广泛存在于环境中,是由包含C和H的化合物不完全燃烧形成的(Ribes et al.,2003)。城市环境中多环芳烃的最重要来源是化石燃料的燃烧,包括钢铁和石油工业生产中的排放和城...
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多环芳烃(PAHs)是由2个或者2个以上苯环组成的一类复杂烃类,它广泛存在于环境中,是由包含C和H的化合物不完全燃烧形成的(Ribes et al.,2003)。城市环境中多环芳烃的最重要来源是化石燃料的燃烧,包括钢铁和石油工业生产中的排放和城市非工业区室外环境供暖燃煤和机动车燃油中的释放(Ribes et al.,2003;王雅琴等,2004)。近几十年来,多环芳烃由于其“三致”效应引起了人们的广泛关注,而植物体能够富集大气中的多环芳烃,所以人们常利用植物体来研究大气中的多环芳烃状况,
In this study,tetraploid of oil camellia (Camellia oleifera) was identified from the superior clones which were treated with colchicine,and the tetraploid variation was investigated with the experimental material. Ana...
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In this study,tetraploid of oil camellia (Camellia oleifera) was identified from the superior clones which were treated with colchicine,and the tetraploid variation was investigated with the experimental material. Analysis of the number of chromosome showed the chromosome number of the tetraploid oil camellia was 2n=4x=60,compared with the diploid (2n=2x=30). The morphological observation showed that the leaf area,leaf length,leaf width,leaf thickness and the space of leaf in the tetraploid were respectively increased by 9.8%,38.5%,25%,48.25%,67%,compared with the diploid. The chlorophyll content and the length and width of guard cells were respectively increased by 47.87%,48.15% and 37.26%,while the leaf-shape index reduced 38.1% than that in the control group. In addition,the leaf of tetraploid plant became more round,the total DNA content was twice as the control group was,and the net photosynthetic rate was also greater than that of the control group. The genetic polymorphism analysis with the mtDNA and cpDNA primers showed that no polymorphic locus was found in the tetraploid,which meant that the tetraploid was autotetraploid,however the genetic polymorphism analysis in the nDNA exhibited that the polymorphic ratio was 51%.
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