Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan.
Institute of Botany, University of the Punjab New Campus, Lahore, Pakistan.
BMC Plant Biol. 2024 Aug 7;24(1):754. doi: 10.1186/s12870-024-05469-8.
This study aimed to evaluate the suitability of using drain water as a source of irrigation and its effects along with salicylic acid on morphological, anatomical, physico-chemical as well as yield attributes of potato. For this study, potato tubers were grown in pots and irrigated with different concentrations of drain water. Salicylic acid treatments vis. 0, 0.5 and 1.0 mM were applied foliarly. Pre- and post-harvest analysis was carried out to determine different attributes of soil, water and plants after 60 days.
The growth of potato plant was increased as the concentration of SA increased through increasing shoot length, fresh/dry weight and tuber number/plant. In this research work, plant respond to overcome metal stresses by up regulating antioxidant defense system such as, peroxidase, catalase and superoxide dismutase) by application of highest treatment of SA when irrigated with 6% drain water. Plants accumulated the highest concentrations of Cd, Cr, and Pb in the leaves when treated with 1 mM of SA, compared to other plant parts. It was observed that photosynthetic pigment enhanced in 6% drain water treated plants when applied with 1mM SA as compared to control. An increase in epidermis and cortical cell thickness, as well as stomatal closure, was observed, helping to maintain water loss under stress conditions.
According to these results, it can be suggested that SA is potent signaling molecule can play an essential role in maintaining potato growth when irrigated with drain water containing heavy metals through stimulating metal up take and up regulation of antioxidant enzymes.
本研究旨在评估利用排水作为灌溉水源的适宜性及其与水杨酸一起对马铃薯形态、解剖、理化和产量特性的影响。为此，在盆中种植马铃薯块茎，并使用不同浓度的排水进行灌溉。叶面喷施水杨酸处理，浓度分别为 0、0.5 和 1.0 mM。在 60 天后进行收获前和收获后的分析，以确定土壤、水和植物的不同属性。
随着 SA 浓度的增加，马铃薯植株的生长增加，表现为茎长、鲜重/干重和每株块茎数的增加。在这项研究工作中，植物通过应用最高浓度的 SA（6%的排水）来上调抗氧化防御系统（如过氧化物酶、过氧化氢酶和超氧化物歧化酶），以应对金属胁迫。与其他植物部位相比，当用 1mM 的 SA 处理时，植物在叶片中积累了最高浓度的 Cd、Cr 和 Pb。与对照相比，用 1mM 的 SA 处理的 6%排水处理植物中的光合色素增强。观察到表皮和皮层细胞厚度增加，以及气孔关闭，有助于在胁迫条件下保持水分流失。
根据这些结果，可以认为 SA 是一种有效的信号分子，可以通过刺激金属吸收和上调抗氧化酶来在灌溉含有重金属的排水时发挥重要作用，维持马铃薯的生长。
