Department of Botany, Government College Women University, Sialkot, Pakistan.
Sustainable Development Study Center, Government College University, Lahore, Pakistan.
Sci Rep. 2020 Jul 9;10(1):11361. doi: 10.1038/s41598-020-68208-7.
Due to fresh water scarcity, farmers are using polluted water for irrigation. This research was conducted to study the bioaccumulation of Pb in wheat (Cv. Shafaq-2006). The experiment was comprised of seven treatments of lead i.e. 0-1,000 mg Pb/kg. The results revealed that lead severely reduces germination (- 30%), seedling fresh weight (- 74%), seedling dry weight (- 77%), vigor index (- 89%), tolerance index (- 84%), plant height (- 33%), number of leaves (- 41%), root fresh weight (- 50%), shoot fresh weight (- 62%), root dry weight (- 63%), shoot dry weight (- 71%), and root length (- 45%). The physiological parameters also respond negatively like stomatal conductance (- 82%), transpiration rate (- 72%) and photosynthetic rate (- 74%). Similarly, biochemical parameters also showed negative impacts, like carotenoids (- 41), total chlorophyll (- 43), chlorophyll a (- 42) and chlorophyll b (- 53). Yield parameters like the number of seed/plant, seed weight/plant, 1,000 seed weight and harvest index were reduced by 90%, 88%, 44% and 61%, respectively in T. In addition, protein contents (- 81%), phosphorous (- 60%) and potassium (- 55%) were highly effected in the highest lead concentration (T). Lead accumulation was extremely higher in seeds (119%) as compared to control plants. Lead bio-accumulation above threshold concentrations in crop parts is a serious human health concern.
由于淡水资源短缺，农民开始使用受污染的水进行灌溉。本研究旨在研究 Pb 在小麦（品种 Shafaq-2006）中的生物累积。该实验共设置了 7 个 Pb 处理水平，分别为 0-1000mg Pb/kg。结果表明，Pb 严重抑制了小麦的发芽（-30%）、幼苗鲜重（-74%）、幼苗干重（-77%）、活力指数（-89%）、耐性指数（-84%）、株高（-33%）、叶片数（-41%）、根鲜重（-50%）、茎鲜重（-62%）、根干重（-63%）、茎干重（-71%）和根长（-45%）。同时，生理参数也受到负面影响，如气孔导度（-82%）、蒸腾速率（-72%）和光合速率（-74%）。此外，生化参数也表现出负面影响，如类胡萝卜素（-41%）、总叶绿素（-43%）、叶绿素 a（-42%）和叶绿素 b（-53%）。产量参数方面，单株种子数、单株种子重、千粒重和收获指数分别减少了 90%、88%、44%和 61%。此外，在最高 Pb 浓度处理（T）下，蛋白质含量（-81%）、磷含量（-60%）和钾含量（-55%）也受到了极大影响。与对照植株相比，种子中 Pb 的积累量（119%）极高。作物部分中 Pb 的生物累积超过阈值浓度会对人类健康造成严重威胁。
