Simulated drought with Polyethylene-Glycol (PEG) decreases above-ground performance and increases nodulation in the legume Medicago lupulina

用聚乙二醇（PEG）模拟干旱会降低豆科植物苜蓿（Medicago lupulina）地上部分的生长性能，并增加其根瘤形成。