To investigate the effects of waterlogging stress on grain nutritional quality and pod yield, peanut plants were waterlogged for 3 and 6 days at 7, 14, 21, 28, 35, 42, 49, 56 and 63 days after gynophores touched the ground in 2019 and 2020. Results revealed that compared with the control treatment, the oil and starch content in grain increased, while crude protein and soluble sugar content decreased under waterlogging. Waterlogging stress increased the unsaturated fatty acids content but decreased the saturated fatty acids, essential amino acids, non-essential amino acids and total amino acids content. In addition, waterlogging stress decreased the total pod number per plant by 6.78%–49.33%, 100-pod weight by 1.11%–14.08% and 100-grain weight by 1.85%–16.41%, which caused a 34.33%–55.90% reduction in pod yield per plant. After the gynophore touched the ground for 7 days, waterlogging had a greater negative effect on grain nutritional quality, and longer waterlogging duration led to greater yield reduction. In summary, waterlogging stress caused peanut yield reduction and grain quality deterioration.

中文翻译：

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涝害胁迫对花生（Arachis hypogaea L.）籽粒营养品质和荚果产量的影响

为研究涝渍胁迫对籽粒营养品质和豆荚产量的影响，在 2019 年雌蕊触地后的第 7、14、21、28、35、42、49、56 和 63 天，花生植株分别浸水 3 天和 6 天。和 2020. 结果表明，与对照相比，涝渍处理后籽粒油脂和淀粉含量增加，粗蛋白和可溶性糖含量降低。涝渍胁迫增加了不饱和脂肪酸含量，降低了饱和脂肪酸、必需氨基酸、非必需氨基酸和总氨基酸含量。此外，涝渍胁迫使单株总荚数减少6.78%~49.33%，百荚重减少1.11%~14.08%，百粒重减少1.85%~16.41%，减产34.33%~55.90%每株植物的豆荚产量。雌蕊着地7 d后，涝渍对籽粒营养品质的负面影响更大，而且涝渍时间越长，减产幅度越大。综上所述，涝害胁迫导致花生减产和籽粒品质恶化。