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Excluder Strategies in Response to Pb Toxicity in Matricaria Chamomilla

机译：母体Chamomilla对Pb毒性反应的排除策略

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Lead is among the most contaminant metals in ecosystem and has different effects on anatomical and morphological characters of different plant species. Matricaria chamomilla is an important medicinal plant which contains 120 chemical compositions. In this research, the effects of lead on production of apigenin as a significant medicinal substance were studied. Furthermore, structural changes of M. chamomilla were studied in different stages of development by electron and optic microscopes. So the plants in first stage of development, were transplanted to hydroponic culture with five-treatment design of 0, 60, 120, 180, 240 μM Pb. The plants under treatment were harvested in first stage of development, as well as in shooting and flowering stages for measurement of Pb absorption. According to this study, morphological changes were not visually observed during the treatment process in different stages; nevertheless, reduction in total biomass was detected in different stages compared to control plants. The results of SEM study of leaf indicated structural changes in stomata and epicuticular waxes in different stages. Also in anatomical studies we noticed several changes in cross section of leaf, stem and root. The obtained results indicated that in different stages, Pb accumulation in roots and shoots has increased under Pb stress during various stage of development. Moreover, Pb stress has no effect on apigenin content. Therefore, M. chamomilla is an excluder species which is tolerant to Pb stress.
机译：铅是生态系统中污染最严重的金属之一，对不同植物物种的解剖和形态特征有不同的影响。洋母菊是一种重要的药用植物，含有120种化学成分。在这项研究中，研究了铅对芹菜素作为重要药物的生产的影响。此外，通过电子显微镜和光学显微镜研究了沙门氏菌在不同发育阶段的结构变化。因此，将处于发育第一阶段的植物移植到水培培养中，采用0、60、120、180、240μMPb的五处理设计。在发育的第一阶段以及在射击和开花阶段收获被治疗的植物，以测量其对Pb的吸收。根据这项研究，在治疗过程中的不同阶段没有肉眼观察到形态变化。然而，与对照植物相比，在不同阶段检测到总生物量减少。叶片的SEM研究结果表明气孔和表皮蜡在不同阶段的结构变化。同样在解剖学研究中，我们注意到叶片，茎和根的横截面发生了一些变化。所得结果表明，在铅的不同发育阶段，根和芽中铅的积累在铅的胁迫下都有所增加。此外，铅胁迫对芹菜素含量没有影响。因此，沙门氏菌是可耐受铅胁迫的排斥物种。

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