Abstract Waterlogging is a serious environmental threat that limits crop growth and yield in low-lying, rainfed areas in many regions across the globe. Here we investigated the effects of waterlogging and subsequent re-oxygenation on the physiology and biochemistry of three soybean [Glycine max (L.) Merrill] genotypes (PELBR10-6000, PELBR11-6028, and PELBR11-6042) and two cultivars (TEC IRGA 6070 and BMX Potencia). Plants were grown under greenhouse conditions until the V4 stage when they were subjected to waterlogging for seven days. The water was then drained and plants were allowed to recover for another seven days. Overall, all genotypes suppressed waterlogging stress with distinct mechanisms. Waterlogged PELBR10-6000 surpassed control plant levels of CO2 assimilation rate and readily responded to the energy lack induced by hypoxia by activating the fermentative enzymes and alanine aminotransferase. Similar mechanisms were observed in BMX Potencia, which restored metabolism to control levels at the end of the recovery. PELBR11-6028 and PELBR11-6042 activated the antioxidant defenses, and TEC IRGA 6070 did not delay flowering.

中文翻译：

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5种大豆基因型不同生理生化机制的耐涝性

摘要 内涝是一种严重的环境威胁，限制了全球许多地区低洼、雨育地区的作物生长和产量。在这里，我们研究了涝渍和随后的再充氧对三种大豆 [Glycine max (L.) Merrill] 基因型（PELBR10-6000、PELBR11-6028 和 PELBR11-6042）和两个品种（TEC IRGA）的生理和生物化学的影响6070 和 BMX Potencia）。植物在温室条件下生长，直到它们遭受 7 天的淹水时的 V4 阶段。然后排干水，让植物再恢复 7 天。总体而言，所有基因型都以不同的机制抑制了涝渍胁迫。浸水 PELBR10-6000 超过了对照植物的 CO2 同化率水平，并通过激活发酵酶和丙氨酸氨基转移酶轻松应对缺氧引起的能量缺乏。在 BMX Potencia 中观察到类似的机制，在恢复结束时将新陈代谢恢复到控制水平。PELBR11-6028 和 PELBR11-6042 激活了抗氧化防御，TEC IRGA 6070 没有延迟开花。