Biota of coastal estuarine habitats of tropics and subtropics are extremely vulnerable. In the study, we have investigated the role of rhizosphere process in bio-accumulation of heavy metals in fine nutritive roots of riparian mangroves at eleven sampling locations of river Hooghly. The rhizospheric sediment of river Hooghly was accumulating HMs due to the presence of organic content and anthropogenic inputs. The mean EF (2.03–8.3), Igeo (−2.27–0.71), and CF (0.62–2.53) values signifies the enrichment of HMs in sediment fine fraction (<62.5 μm) whereas, the mean PLI (0.83 to 1.18) indicates gradual environmental degradation of river Hooghly. Low BCF observed in the river Hooghly might be due to barrier to hypodermal structures and/or any prevailing mechanism of saturation of HMs. However, BCF > 1 for Al, Cu, Cr, Mn, and Zn, signifies the phyto-remediation potential of riparian mangroves to mitigate amplified global anthropogenic environmental changes.

热带和亚热带沿海河口栖息地的生物群极其脆弱。在这项研究中，我们在胡格利河的 11 个采样点研究了根际过程在河岸红树林细营养根中重金属生物积累中的作用。由于有机成分和人为输入的存在，胡格利河的根际沉积物正在积累 HMs。平均EF (2.03–8.3)、Igeo (-2.27–0.71) 和 CF (0.62–2.53) 值表示 HM 在沉积物细粒部分 (<62.5 μm) 中的富集，而平均PLI (0.83 到 1.18) 表明Hooghly 河的环境逐渐恶化。低BCF在 Hooghly 河中观察到的可能是由于皮下结构的屏障和/或任何普遍的 HM 饱和机制。然而， 对于 Al、Cu、Cr、Mn 和 Zn，BCF > 1 表明河岸红树林的植物修复潜力可缓解全球人为环境变化的扩大。