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首页> 外文期刊>African Journal of Biotechnology >Lead-induced changes in plant morphology, cell ultrastructure, growth and yields of tomato
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Lead-induced changes in plant morphology, cell ultrastructure, growth and yields of tomato

机译：铅诱导的番茄植物形态，细胞超微结构，生长和产量的变化

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A pot experiment in plastic greenhouse was conducted to investigate the effect of Pb toxicity on development and ultrastructure of tomato?(Lycopersicon?esculentumMill.?cv. ZZ203) by four levels of Pb addition [0, 150, 450, and 900 mg/kg Pb in soil as Pb(NO3)]. The results showed that excess lead resulted in dwarf plants, wilting and misshapened leaves accompanied by less number, less numbers of the calyx, and longer-smaller fruits. At the same time, the condensed cytoplasm accompanied by the department of plasma from cell wall, swollen mitochondrial and chloroplast including thylakoid, fewer cristae in mitochondrial, loosely combined thylakoid to form askew grana, disruption plasma membrane and also followed with dilation organelles were all the typical toxic symptoms of Pb stress. Otherwise, plant biomass and fruit yields decreased as Pb increased: treatment or addition of Pb (150 mg/kg) decreased the aforestated parameters, but these differences did not approach significance at 5% level of probability; however, Pb (450 or 900 mg/kg) treatment, significantly decreased the aforementioned parameters. Excess lead (900 mg/kg) inhibited biomass and fruit yields by 71 and 51% as compared to the zero Pb control treatment respectively. Concentration of Pb in plant tissues decreased in the following order: fruits, leaves, stems and roots.
机译：通过在塑料温室中进行盆栽试验，研究了铅的四种添加水平（0、150、450和900 mg / kg），研究了铅对番茄（Lycopersicon？esculentumMill。？cv.ZZ203）发育和超微结构的影响。土壤中的铅为铅（NO3）]。结果表明，过量的铅导致矮化的植物，枯萎的叶片和畸形的叶片，伴随着更少的数量，更少的花萼数量和更长的较小果实。同时，细胞壁凝结的细胞质伴有血浆部，线粒体和叶绿体（包括类囊体）肿胀，线粒体中的ista少，类囊体松散结合形成歪斜的颗粒，破坏质膜以及随后的扩张细胞器。铅胁迫的典型毒性症状。否则，随着Pb的增加，植物的生物量和果实的产量会下降：处理或添加Pb（150 mg / kg）会降低上述参数，但是这些差异在5％的概率水平上没有达到显着性;然而，Pb（450或900 mg / kg）处理显着降低了上述参数。与零铅对照相比，过量铅（900 mg / kg）分别抑制了生物量和水果产量71％和51％。植物组织中的Pb浓度按以下顺序降低：果实，叶，茎和根。

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