Low-molecular-weight organic acid-mediated tolerance and Pb accumulation in centipedegrass under Pb stress

Lead accumulation and biochemical responses in Rhus chinensis Mill to the addition of organic acids in lead contaminated soils

“…In addition, based on the chlorophyll concentration, it is speculated that one of the reasons for the increased biomass accumulation may be that exogenous LWMOAs promote photosynthesis. 19,56 Simultaneously, the chlorophyll concentration of organic acid treatments was in the order of T9 > T8 > T6 > T7 (Table S3†). These results also further demonstrated that the application of oxalic acid could better promote plant shoot development.…”

“…11,41 Therefore, the rational application of LMWOAs can improve the efficiency of phytoremediation effectively. 19…”

“…17,18 Among these species, a few hyperaccumulators are available for Pb-contaminated soil remediation. 19,20 Due to the low bioavailability of Pb in soil, many species cannot uptake large quantities of Pb from the soil and translocate it from the roots to the aerial parts. Furthermore, low biomass and remediation efficiency are bottlenecks for the practical application of phytoremediation.…”

“…35,36 Therefore, LMWOAs may enhance phytoremediation efficiency by promoting heavy metals uptake and accumulation by plants and improving their tolerance to heavy metals. 19,20 Cai et al reported that citric acid, malic acid, and tartaric acid application can signicantly increase the Pb phytoremediation efficiency of centipedegrass. 19 Similar results were also found in Solanum nigrum 31 and Typha latifolia.…”

“…19,20 Cai et al reported that citric acid, malic acid, and tartaric acid application can signicantly increase the Pb phytoremediation efficiency of centipedegrass. 19 Similar results were also found in Solanum nigrum 31 and Typha latifolia. 37 However, some studies pointed out that LMWOAs could not signicantly promote the uptake of Pb by plants.…”