Cadmium stress inhibits the growth of primary roots by interfering auxin homeostasis in Sorghum bicolor seedlings

Zhan, Yihua; Zhang, Chenghao; Zheng, Qiu-xun; Huang, Zong-an; Yu, Chenliang

doi:10.1007/s12374-017-0024-0

Cited by 30 publications

(16 citation statements)

References 53 publications

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“…This finding is in agreement with the data presented by Schopfer et al [32], who documented that the presence of oxygen reactive species (ROS) (e.g., H 2 O 2 ) in the cell wall is necessary to promote the auxin-induced growth of coleoptile sections. Most investigations have shown that treating plants with heavy metals decreases the content of IAA in plants, see [33] and literature therein [34][35][36][37][38][39]. In the current study, we found that Pb and Cd increased the content of IAA in the corn coleoptile sections, but only at the concentrations at which stimulation of elongation growth was observed ( Figure 1).…”

Section: Discussionsupporting

confidence: 63%

Hormesis in Plants: The Role of Oxidative Stress, Auxins and Photosynthesis in Corn Treated with Cd or Pb

Małkowski

Sitko

Szopiński

et al. 2020

IJMS

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Hormesis, which describes the stimulatory effect of low doses of toxic substances on growth, is a well-known phenomenon in the plant and animal kingdoms. However, the mechanisms that are involved in this phenomenon are still poorly understood. We performed preliminary studies on corn coleoptile sections, which showed a positive correlation between the stimulation of growth by Cd or Pb and an increase in the auxin and H 2 O 2 content in the coleoptile sections. Subsequently, we grew corn seedlings in hydroponic culture and tested a wide range of Cd or Pb concentrations in order to determine hormetic growth stimulation. In these seedlings the gas exchange and the chlorophyll a fluorescence, as well as the content of chlorophyll, flavonol, auxin and hydrogen peroxide, were measured. We found that during the hormetic stimulation of growth, the response of the photosynthetic apparatus to Cd and Pb differed significantly. While the application of Cd mostly caused a decrease in various photosynthetic parameters, the application of Pb stimulated some of them. Nevertheless, we discovered that the common features of the hormetic stimulation of shoot growth by heavy metals are an increase in the auxin and flavonol content and the maintenance of hydrogen peroxide at the same level as the control plants.

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Section: Discussionsupporting

confidence: 63%

Hormesis in Plants: The Role of Oxidative Stress, Auxins and Photosynthesis in Corn Treated with Cd or Pb

Małkowski

Sitko

Szopiński

et al. 2020

IJMS

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“…Moreover, we found that prolonged treatment with both Cd concentrations resulted in an increase in biomass, especially in root length and root weight. Previous studies have shown that Cd addition leads to the dramatic inhibition of root growth, probably due to the in uence of the homeostasis of auxin and ROS [36]. On the other hand, Schützendübel et al [37] showed that 5 µM Cd stimulated root growth in hydroponically grown grey poplar, which correlates with our ndings.…”

Section: Discussionsupporting

confidence: 90%

Physiological and Transcriptomic Response of Grey Poplar (Populus ×Canescens Aiton Sm.) to Cadmium Stress

Komarkova

Chromy

Pokorná

et al. 2020

Preprint

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Background: Populus ×canescens (Aiton) Sm. is a fast-growing woody plant belonging to the family Salicaceae. Thanks to its deep root system and fast growth rate, two poplar genotypes (TP11 and TP20) was chosen to be characterized and tested for a physiological and transcriptomic response to Cd stress.Results: Both sexual and clonal reproduction are common in grey poplar. Thus, to reveal its genetic structure, two selected poplar genotypes characterized by unique phenotypic traits were distinguished by microsatellite analysis. A comparative analysis of the effects of exposure to high cadmium (Cd) concentrations on the physiological response of TP11 and TP20 was performed. After 2 and 10 days, 10 µM and 100 µM Cd were added to the nutrient solution of poplar plants grown in perlite. Neither tested Cd concentration negatively affected plant growth; however, the chlorophyll content significantly decreased. According to mineral uptake analysis, the potassium (K) content was higher in the shoots than in the roots. The calcium (Ca) and magnesium (Mg) concentrations were only slightly affected by Cd treatment. The zinc (Zn) content in the shoots of TP20 was lower than that in the shoots of TP11. Moreover, the amount of Zn was slightly higher in the shoots of both genotypes after 10 days of Cd treatment compared to the control conditions. Cd accumulation was higher in the roots than in the shoots. After 2 days of 100 µM Cd treatment, TP11 accumulated significantly more Cd in the roots than TP20. After 10 days of exposure, 10 µM Cd resulted in comparable amounts of Cd in the roots and shoots of TP20, which was reflected in a translocation factor (TF) value greater than 1. Quantitative real-time RT-PCR analyses were used to examine the expression profiles of selected stress-response genes in the roots and shoots of plants exposed to Cd. The most significant change in transcript amount was observed in endochitinase 2, 12-oxophytodienoate reductase 1 and phi class glutathione S-transferase, which have been characterized as stress-response genes.Conclusions: Our study provided new insights for effective assessing the ability of different poplar genotypes to tolerate Cd stress and underlying Cd tolerance.

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“…Auxin was the most dominant hormone promoting lateral root formation, while cytokinin and abscisic acid suppressed lateral root formation (Tamás et al, 2012). The cell cycle of root tips was dramatically influenced by auxin homeostasis during Cd stress in various plants such as Sorghum bicolor seedlings (Zhan et al, 2017), Arabidopsis seedlings (Hu et al, 2013) and rice seedlings (Zhao et al, 2011(Zhao et al, , 2012.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have focused on growth, oxidative stress, photosynthesis and other physiological alterations when exploring Cd-stress responses in plants. The growth repressions of shoots and roots in plants have been considered as direct symptoms of Cd toxicity (Liu et al, 2016;Zhan et al, 2017). Also, the oxidative stress (Haluskova et al, 2010;Yan et al, 2016) and adjustments in photosynthesis and energy metabolism (Elloumi et al, 2014;Ozfidan-Konakci et al, 2018) are apparent deficiencies caused by Cd stress in plant.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of three wheat (Triticum aestivum L.) cultivars as sensitive Cd biomarkers during the seedling stage

Ding

Mubeen

et al. 2020

PeerJ

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Sensitive seedling crops have been developed to monitor Cadmium (Cd) contamination in agricultural soil. In the present study, 18 parameters involving growth conditions and physiological performances were assessed to evaluate Cd-responses of three wheat (Triticum aestivum L.) cultivars, Xihan1 (XH), Longzhong1 (LZ) and Dingfeng16 (DF). Principle component analysis illustrated that Factor 1, representing growth performance, soluble sugar content and catalase activity, responded to the Cd treatments in a dose dependent manner, while Factor 2 represented by chlorophyll content and germinating root growth was mainly dependent on cultivar differences. Higher inhibition rates were observed in growth performance than in physiological responses, with the highest inhibition rates of shoot biomasses (39.6%), root length (58.7%), root tip number (57.8%) and bifurcation number (83.2%), even under the lowest Cd treatment (2.5 mg·L−1). According to the Cd toxicity sensitivity evaluation, DF exerted highest tolerance to Cd stress in root growth while LZ was more sensitive to Cd stress, suggesting LZ as an ideal Cd contaminant biomarker. This study will provide novel insight into the cultivar-dependent response during using wheat seedlings as Cd biomarkers.

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Cadmium stress inhibits the growth of primary roots by interfering auxin homeostasis in Sorghum bicolor seedlings

Cited by 30 publications

References 53 publications

Hormesis in Plants: The Role of Oxidative Stress, Auxins and Photosynthesis in Corn Treated with Cd or Pb

Hormesis in Plants: The Role of Oxidative Stress, Auxins and Photosynthesis in Corn Treated with Cd or Pb

Physiological and Transcriptomic Response of Grey Poplar (Populus ×Canescens Aiton Sm.) to Cadmium Stress

Evaluation of three wheat (Triticum aestivum L.) cultivars as sensitive Cd biomarkers during the seedling stage

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