Different Proteomic Processes Related to the Cultivar-Dependent Cadmium Accumulation of Amaranthus gangeticus

Abstract

To deal with the Cd contaminant of agricultural soil, pollution-safe cultivar (PSC) is developed to minimize the Cd accumulation risk in crops. The present study aimed to investigate the different proteomic responses related to Cd accumulation in different tissues between two Amaranthus gangeticus cultivars, Pen and Nan. A significantly higher Cd accumulation in Pen than in Nan was unraveled, especially in shoot. The proportions of soluble Cd in root and stem of Nan were significantly lower than those of Pen, implying lower Cd transportation from root to shoot in Nan. Higher contents of NaCl-extracted Cd in Pen than in Nan were probably attributed to the enhancement of GSH related metabolism in Pen, which activated the transportation of Cd from root to shoot. Alteration of other proteins involved in Cd detoxification and energy production also demonstrated that Pen had exhibited a stronger tolerance than Nan in dealing with Cd stress. Thus, differences in the proteomic processes associated with biochemical differences between the two typical cultivars suggested a cultivar-dependent capacity of Cd tolerance and accumulation in amaranth for the first time.

Morphological Responses and Gene Expression of Grain Amaranth (Amaranthus spp.) Growing under Cd

“…Although the highest Cd concentration of 15 mg/L did not cause toxic effects, the plants showed a variety-dependent capacity for Cd tolerance. Similar cultivar-dependent Cd tolerance and accumulation has been reported in A. gangeticus [31] and in A. mangostanus [26].…”

“…Recently, Wang et al [30] showed an effective increase in Cd uptake and an enhanced ability of Amaranthus hypochondriacus plants to absorb and transport Cd from soils using degradable chelators. He et al [31] suggested a cultivar-dependent capacity for Cd tolerance and accumulation in Amaranthus gangeticus.…”

Comparative proteomics analysis of peanut roots reveals differential mechanisms of cadmium detoxification and translocation between two cultivars differing in cadmium accumulation

“…Proteomic analysis offers accurate information about molecular changes within a range of biological processes, and is a powerful tool for identifying the main regulators in the considered pathways [20]. Up to date, cultivar differences of proteomics in response to Cd stress have been investigated in several plant species such as amaranth [20], Sedum alfredii [21], rice [22] and soybean [23]. Some differential expressed proteins (DEPs) associated with vacuolar Cd sequestration, cell wall metabolism, Cd-stress defense and other processes were identified [20, 21].…”

“…Up to date, cultivar differences of proteomics in response to Cd stress have been investigated in several plant species such as amaranth [20], Sedum alfredii [21], rice [22] and soybean [23]. Some differential expressed proteins (DEPs) associated with vacuolar Cd sequestration, cell wall metabolism, Cd-stress defense and other processes were identified [20, 21]. In peanut, proteomics approach has been applied to address biochemical and physiological effects in response to drought stress [24].…”

Peer Review #1 of "Evaluation of three wheat (Triticum aestivum L.) cultivars as sensitive Cd biomarkers during the seedling stage (v0.1)"

“…Cultivar-dependent differential Cd tolerance has been reported in various plants such as maize (Akhtar et al 2017), Amaranthus gangeticus (He et al 2018), Italian ryegrass (Fang et al 2017), and rice (Hou et al 2018). In current study, different Cd tolerance and tissues vulnerable to Cd toxicity in three tested cultivars were unraveled.…”