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模拟酸雨对龙眼叶绿体的伤害效应 总被引:10,自引:1,他引:10
龙眼叶绿体超氧化的歧化酶(SOD)和抗坏血酸过氧化物酶(AsA-POD)活性,谷胱甘肽(GSH)和抗坏血酸含量(AsA)含量随酸雨的pH值下降而降低,膜脂质过氧化产物丙二醛(MDA)的含量则随酸雨的pH下降而增加。pH3.0的酸雨胁迫2h,SOD和AsA-POD活性,GSH和AsA含量有所增加,并随胁迫时间的延长而下降。pH3.5的酸雨处理使类整体膜崩解,叶绿体基粒片层结构混乱;pH3.0的酸雨处理的叶绿体片层结构伤害更为严重。图5图版2参21 相似文献
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紫羊茅根中铜结合肽的分离和纯化 总被引:8,自引:0,他引:8
利用1次SephadexG50凝胶过滤和2次QAESephadexA25离子交换层析的方法,从最后6d用CuCl2处理(ρ=20mg/L)、20d龄的紫羊茅(Festucarubracv.Merlin)根中分离纯化了1个铜结合肽(CuBP2a),该肽在SuperdexPeptideHR10/30预装柱的FPLC凝胶过滤中在λ254nm处只出现一个峰,经分子量标准曲线估计,其Mr约为1400,在DeltaPakC18的反相HPLC中,在λ254nm处也只有1个紫外吸收峰值,这都说明该肽已经达到了较高的的纯度.通过光谱分析,发现该肽的最大紫外吸收值在248.1nm处.对Cu结合物在植物体内的存在状态进行了讨论. 相似文献
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Wittig R Ballach HJ Kuhn A 《Environmental science and pollution research international》2003,10(4):235-244
Poplar cuttings were cultivated for 4 weeks in a substrate, which consisted of a combination of sand and nutrient solution. The plants were treated for 24 days with BaP, Chr, Ant, Phen, P and Flt, single or in combination. The concentration of the PAHs ranged from 0.1-200 mg/kg substrate. The results of the pollution experiments can be summarized as follows: 1. The most significant deviations between the test groups and the control can be observed for transpiration, nutrient solution uptake, and root mass. 2. Although transpiration and nutrient solution uptake are significantly lower for all the treated groups than for the control group, the water content of the leaves was not affected by PAHs. 3. The biomass of the shoots and the growth in shoot length do not react as strongly to exposure to PAHs as transpiration, nutrient solution uptake and the volume of the roots. 4. The differences in leaf weight and leaf surface area are significantly less pronounced compared to the control groups. Growth inhibition is most evident with Flt. Growth and absorption of the nutrient solution dropped with just Flt 0.1 mg/kg substrate. When the substrate concentration was increased, growth and nutrient solution uptake dropped considerably and at a concentration of Flt 200, 5 of the 11 test plants died before the end of the period of exposure. Nutrient solution uptake and shoot development of the test plants decreased in the following order: BaP H approximately = Chr > Ant > Phen > Pyr > Flt. 相似文献
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从山西引进了梨枣优良品种进行实验,并以本省的鸡蛋枣作对照,通过两年的生长规律观察,得知梨枣在衡阳地区定植后前两年生长情况,本文报道第一年枣头一次枝(后简称枣头)生长规律,定植后的第一年梨枣年生长量小于鸡蛋枣,部分植株的枣头有二次生长现象,但其二次生长现象不如鸡蛋枣普遍,枣头生长关键时期在第一次生长时期. 相似文献
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采用4年生中秋酥脆枣在紫色土和第四纪红壤上进行了系统观测,两种土壤条件下均表现出品种固有的优良品质,生长和丰产性能在第四纪红壤上优于紫色页岩土壤,果品品质相差不大,但紫色页岩土壤上表现稍好.图2,表2,参5. 相似文献
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山东乐陵金丝小枣种植区土壤地球化学特征 总被引:1,自引:0,他引:1
以全国土地现状调查与污染防治项目取得的地球化学资料为依据,通过分析研究乐陵金丝小枣种植区土壤化学元素特征,以及土壤化学元素与乐陵金丝小枣相应元素含量之间的关系,综合得出金丝小枣种植区土壤中K、P、Cu、Fe、Mg、Mn、Se等元素含量较高,且对金丝小枣的品质影响较大。根据相关分析,金丝小枣果实与土壤元素中的P、Zn、B呈显著相关关系,其相关关系分别为0.5971、0.6957和0.5289;与N、Ca呈低度相关性,其相关系数均大于0.3。结合基础调查成果,提出了金丝小枣合理规划建议。 相似文献
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