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Static magnetic field treatment enhanced photosynthetic performance in soybean under supplemental ultraviolet-B radiation
Photosynthesis Research ( IF 2.9 ) Pub Date : 2021-06-01 , DOI: 10.1007/s11120-021-00850-2
Sunita Kataria 1 , Meeta Jain 1 , Anshu Rastogi 2, 3 , Marian Brestic 4, 5
Affiliation  

The study was performed to analyze the impact of seed pretreatment by static magnetic field (SMF) of 200 mT for 1 h on photosynthetic performance of soybean (Glycine max) seedlings under ambient (aUV-B) and supplemental ultraviolet-B (a+sUV-B) stress. Ambient and supplemental UV-B were found to decrease the plant growth, chlorophyll concentration, PSII efficiency, selected JIP-test parameters such as Fv/Fm, φEo, ΔV(IP), PIABS, PItotal, and rate of photosynthesis in the leaves of soybean seedlings emerged from untreated (UT) seeds. aUV-B and a+sUV-B were observed to increase the synthesis of UV-B-absorbing substances (UAS), reactive oxygen species (ROS) like superoxide radical (O2·−) and hydrogen peroxide (H2O2), antioxidants like ascorbic acid and α-tocopherol and decrease the nitrate reductase (NR) activity; subsequently, it results in a decreased rate of photosynthesis, biomass accumulation, and yield. However, our results provided evidence that SMF pretreatment increased the tolerance of soybean seedlings to UV-B radiation by increased NO content and NR activity; higher efficiency of PSII, higher values of φEo, ΔV(IP), PIABS, and PItotal, decreased intercellular CO2 concentration, lower amount of UAS, ROS, and antioxidants that consequently improve the yield of soybean plants under aUV-B as well as a+sUV-B stress. Thus, our results suggested that SMF pretreatment mitigates the adverse effects of UV-B stress by the enhancement in photosynthetic performance along with higher NO content which may be able to protect the plants from the deleterious effects of oxidative stress caused by UV-B irradiation.



中文翻译:


静态磁场处理增强了补充 UV-B 辐射下大豆的光合性能



本研究旨在分析 200 mT 静磁场 (SMF) 预处理种子 1 h 对大豆 ( Glycine max ) 幼苗在环境 ( a UV-B) 和补充紫外线 -B ( a+)下光合性能的影响。 UV -B)压力。发现环境和补充 UV-B 会降低植物生长、叶绿素浓度、PSII 效率,选定的 JIP 测试参数,如F v / F mφ Eo、Δ V ( IP )、PI ABS 、 PI总量、未经处理(UT)种子的大豆幼苗叶子的光合作用速率。 a UV-B 和a+s UV-B 被观察到增加了 UV-B 吸收物质 (UAS)、活性氧 (ROS) 如超氧自由基 (O 2 ·− ) 和过氧化氢 (H 2 O) 的合成2 )、抗坏血酸和α-生育酚等抗氧化剂,降低硝酸还原酶(NR)活性;随后,它会导致光合作用、生物量积累和产量下降。然而,我们的结果证明,SMF 预处理通过增加 NO 含量和 NR 活性来提高大豆幼苗对 UV-B 辐射的耐受性; PSII 效率更高, φ Eo、Δ V ( IP )、PI ABS和 PI总值更高,细胞间 CO 2浓度降低,UAS、ROS 和抗氧化剂含量降低,从而提高了大豆植株的产量a UV-B 以及a+s UV-B 压力。 因此,我们的结果表明,SMF 预处理通过增强光合作用性能和更高的 NO 含量来减轻 UV-B 胁迫的不利影响,这可能能够保护植物免受 UV-B 照射引起的氧化胁迫的有害影响。

更新日期:2021-06-02
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