Heavy Metal Toxicity and Phytoremediation by the Plants of Brassicaceae Family: A Sustainable Management

Ball, Kakan; Tiru, Zerald; Chakraborty, Arka Pratim; Mandal, Parimal; Sadhukhan, Sanjoy

doi:10.1007/978-3-031-08446-1_8

Cited by 2 publications

(1 citation statement)

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“…AcnB is vital for citrate synthesis in the C metabolism pathway of the TCA cycle. Citrate enhances Cd absorption in wheat [ 47 ], stimulates root stability in Brassicaceae , and acts in phytoremediation as an organic acid [ 48 ]. The high expression observed in RM-H suggests that acnB plays a crucial role in the synthesis of citrate, thereby contributing to the enhanced Cd accumulation in willows.…”

Section: Discussionmentioning

confidence: 99%

Responses of soil and rhizosphere microbial communities to Cd-hyperaccumulating willows and Cd contamination

Zhou,

Zhang,

Wang

et al. 2024

BMC Plant Biol

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Background The pollution of soil by heavy metals, particularly Cd, is constitutes a critical international environmental concern. Willow species are renowned for their efficacy in the phytoremediation of heavy metals owing to their high Cd absorption rate and rapid growth. However, the mechanisms underlying microbial regulation for high- and low-accumulating willow species remain poorly understood. Therefore, we investigated the responses of soil and rhizosphere microbial communities to high- and low-Cd-accumulating willows and Cd contamination. We analyzed soil properties were analyzed in bulk soil (SM) and rhizosphere soil (RM) planted with high-accumulating (H) and low-accumulating (L) willow species. Results Rhizosphere soil for different willow species had more NH4+ than that of bulk soil, and RM-H soil had more than RM-L had. The available phosphorus content was greater in hyper-accumulated species than it was in lower-accumulated species, especially in RM-H. Genome sequencing of bacterial and fungal communities showed that RM-L exhibited the highest bacterial diversity, whereas RM-H displayed the greatest richness than the other groups. SM-L exhibited the highest diversity and richness of fungal communities. Ralstonia emerged as the predominant bacterium in RM-H, whereas Basidiomycota and Cercozoa were the most enriched fungi in SM-H. Annotation of the N and C metabolism pathways revealed differential patterns: expression levels of NRT2, NarB, nirA, nirD, nrfA, and nosZ were highest in RM-H, demonstrating the effects of NO3-and N on the high accumulation of Cd in RM-H. The annotated genes associated with C metabolism indicated a preference for the tricarboxylic pathway in RM-H, whereas the hydroxypropionate-hydroxybutyrate cycle was implicated in C sequestration in SM-L. Conclusions These contribute to elucidation of the mechanism underlying high Cd accumulation in willows, particularly in respect of the roles of microbes and N and C utilization. This will provide valuable insights for repairing polluted soil using N and employing organic acids to improve heavy metal remediation efficiency.

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Section: Discussionmentioning

confidence: 99%