Moulick Debojyoti, Santra S C, Ghosh Dibakar
Department of Environmental Science, University of Kalyani, Nadia, West Bengal, India.
Department of Environmental Science, University of Kalyani, Nadia, West Bengal, India.
Ecotoxicol Environ Saf. 2017 Nov;145:449-456. doi: 10.1016/j.ecoenv.2017.07.060. Epub 2017 Aug 2.
Interactive aspect of among selenium (Se) and As (As) to mitigate As induced phytotoxicity in rice during germination and seedling growth has been based on mostly to petriplates and hydroponic mode of experiments. In this investigation we explore the consequences of sowing Se primed rice seeds in As spiked soil. Unprimed, hydroprimed and Se primed rice (IET-4094) seeds sown in As spiked soil, with five replications, arranged in complete randomized design for evaluating the impacts of seed priming on germination and seedling growth as well as As uptake and translocation pattern. Se promotes germination, seedling growth by modulating proline content, lipid peroxidation in root and shoot beside enhancing total chlorophyll content significantly in both As free and As spiked soil as compared to their respective unprimed and hydroprimed counterparts grown alike. Findings also indicates that seed priming with Se was able to execute dual roles i.e. a promotive and antagonistic aspect against As by restricting maximum soil As load to the root (with greater bioconcentration factor) and reducing translocation of As from root to shoot in a more practical and farmer friendly way to mitigate As induced toxicity and enhance germination and growth in rice seedlings.
在发芽和幼苗生长期间，硒（Se）与砷（As）之间的相互作用减轻水稻中砷诱导的植物毒性，大多基于培养皿和水培实验模式。在本研究中，我们探究了在添加砷的土壤中播种用硒引发处理的水稻种子的结果。将未引发处理、水引发处理和硒引发处理的水稻（IET - 4094）种子播种在添加砷的土壤中，设置五个重复，采用完全随机设计，以评估种子引发处理对发芽、幼苗生长以及砷吸收和转运模式的影响。与在无砷和添加砷土壤中生长的各自未引发处理和水引发处理的对应植株相比，硒通过调节脯氨酸含量、根和地上部的脂质过氧化，显著提高总叶绿素含量，从而促进发芽和幼苗生长。研究结果还表明，用硒进行种子引发处理能够发挥双重作用，即通过以更实际且对农民友好的方式限制根系对土壤中最大砷负荷的吸收（具有更高的生物富集系数）以及减少砷从根向地上部的转运，对砷起到促进和拮抗作用，以减轻砷诱导的毒性并促进水稻幼苗的发芽和生长。
