PDF(Pubmed)
Abstract：
Due to the high solubility of Cd in water, it is considered a potential toxin which can cause cancer in humans. In plants, it is associated with the development of oxidative stress due to the generation of reactive oxygen species. To overcome this issue, the roles of different plant hormones are vital. Strigolactones, one of such natural plant hormones, show promise in alleviating cadmium toxicity by mitigating its harmful effects. Acidified biochar (AB) can also effectively mitigate cadmium toxicity via ion adsorption and pH buffering. However, the combined effects of strigolactone and AB still need in-depth investigations in the context of existing literature. This study aimed to assess the individual and combined impacts of SLs (0 and 25 µM) and AB (0 and 0.75% w/w) on radish growth under Cd toxicity, i.e., 0 and 20 mg Cd/kg soil. Using a fully randomized design (CRD), each treatment was administered in four replicates. In comparison to the control under 20 mg Cd/kg soil contamination, the results showed that 25 µM strigolactone + 0.75% AB significantly improved the following: radish shoot length (~ 17%), root length (~ 47%), plant fresh weight (~ 28%), plant dry weight (~ 96%), chlorophyll a (~ 43%), chlorophyll b (~ 31%), and total chlorophyll (~ 37%). It was also noted that 0.75% AB was more pronounced in decreasing antioxidant activities than 25 µM strigolactone under 20 mg Cd/ kg soil toxicity. However, performing 25 µM strigolactone + 0.75% AB was far better than the sole application of 25 µM strigolactone and 0.75% AB in decreasing antioxidant activities in radish plants. In conclusion, by regulating antioxidant activities, 25 µM strigolactone + 0.75% AB can increase radish growth in cadmium-contaminated soils.
摘要：
由于Cd在水中的高溶解度，它被认为是一种潜在的毒素，可以导致人类癌症。在植物中,由于活性氧的产生，它与氧化应激的发展有关。为了克服这个问题，不同植物激素的作用至关重要。条纹色调，一种这样的天然植物激素，通过减轻镉的有害影响来减轻镉的毒性。酸化生物炭（AB）还可以通过离子吸附和pH缓冲有效减轻镉的毒性。然而,stragolactone和AB的联合作用仍需要在现有文献的背景下进行深入研究。本研究旨在评估SL（0和25µM）和AB（0和0.75％w/w）对Cd毒性下萝卜生长的个体和综合影响。即，0和20mgCd/kg泥土。使用完全随机设计(CRD)，每种治疗均重复四次.与20mgCd/kg土壤污染下的对照相比，结果表明，25µMstrigolactone+0.75％AB显着提高了以下方面：萝卜芽长度（〜17％），根长(~47%)，植物鲜重（~28%），植物干重(~96%)，叶绿素a(~43%)，叶绿素b(~31%)，和总叶绿素(~37%)。还注意到，在20mgCd/kg土壤毒性下，0.75％AB在降低抗氧化活性方面比25µMstrogolactone更为明显。然而,在降低萝卜植物的抗氧化活性方面，执行25µMstrigolactone+0.75％AB远远优于仅使用25µMstrigolactone和0.75％AB。总之,通过调节抗氧化活性，25µMstingolactone+0.75％AB可以增加镉污染土壤中萝卜的生长。
