Short-term exposition to acute cadmium toxicity induces the loss of root gravitropic stimuli perception through PIN2-mediated auxin redistribution in Arabidopsis thaliana (L.) Heynh

Araniti, Fabrizio; Talarico, Emanuela; Madeo, Maria Letizia; Greco, Eleonora; Minervino, Marco; Álvarez-Rodríguez, Sara; Muto, Antonella; Ferrari, Michele; Chiappetta, Adriana; Bruno, Leonardo

doi:10.1016/j.plantsci.2023.111726

Cited by 2 publications

(1 citation statement)

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“…The inhibition of root growth is one of the early symptoms of Cd stress; the effects on cell division and elongation alter root morphology, perhaps by disrupting auxin and cytokinin signaling [ 16 , 17 , 18 ]. Cd stress triggers oxidative stress, damaging membranes and altering organelle development [ 19 , 20 , 21 ]. The Cd-induced accumulation of reactive oxygen species such as superoxide anion (O 2 − ) and hydrogen peroxide (H 2 O 2 ) has been measured in Arabidopsis , Brassica juncea , rice, and apple [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Cadmium Stress on Tartary Buckwheat Seedlings

Du,

Tan,

et al. 2024

Plants

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Cadmium (Cd) is a naturally occurring toxic heavy metal that adversely affects plant germination, growth, and development. While the effects of Cd have been described on many crop species including rice, maize, wheat and barley, few studies are available on cadmium’s effect on Tartary buckwheat which is a traditional grain in China. We examined nine genotypes and found that 30 µM of Cd reduced the root length in seedlings by between 4 and 44% and decreased the total biomass by 7 to 31%, compared with Cd-free controls. We identified a significant genotypic variation in sensitivity to Cd stress. Cd treatment decreased the total root length and the emergence and growth of lateral roots, and these changes were significantly greater in the Cd-sensitive genotypes than in tolerant genotypes. Cd resulted in greater wilting and discoloration in sensitive genotypes than in tolerant genotypes and caused more damage to the structure of root and leaf cells. Cd accumulated in the roots and shoots, but the concentrations in the sensitive genotypes were significantly greater than in the more tolerant genotypes. Cd treatment affected nutrient uptake, and the changes in the sensitive genotypes were greater than those in the tolerant genotypes, which could maintain their concentrations closer to the control levels. The induction of SOD, POD, and CAT activities in the roots and shoots was significantly greater in the tolerant genotypes than in the sensitive genotypes. We demonstrated that Cd stress reduced root and shoot growth, decreased plant biomass, disrupted nutrient uptake, altered cell structure, and managed Cd-induced oxidative stress differently in the sensitive and tolerant genotypes of Tartary buckwheat.

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