scholarly journals Divalent nutrient cations: friend and foe during zinc stress in rice

2021 ◽  
Author(s):  
Boon Huat Cheah ◽  
Yu‐Ling Chen ◽  
Jing‐Chi Lo ◽  
I‐Chien Tang ◽  
Kuo‐Chen Yeh ◽  
...  
Keyword(s):  
Zinc Stress

24-Epibrassinolide Improves Root Anatomy and Antioxidant Enzymes in Soybean Plants Subjected to Zinc Stress

2019 ◽  
Vol 20 (1) ◽  
pp. 105-124 ◽  
Author(s):  
Lucilene Rodrigues dos Santos ◽  
Breno Ricardo Serrão da Silva ◽  
Tatiana Pedron ◽  
Bruno Lemos Batista ◽  
Allan Klynger da Silva Lobato
Keyword(s):  
Antioxidant Enzymes ◽  
Root Anatomy ◽  
Zinc Stress ◽  
Soybean Plants

Growth and photosynthetic responses to zinc stress of an invasive cordgrass,Spartina densiflora

Plant Biology ◽  
2008 ◽  
Vol 10 (6) ◽  
pp. 754-762 ◽  
Author(s):  
E. Mateos-Naranjo ◽  
S. Redondo-Gómez ◽  
J. Cambrollé ◽  
T. Luque ◽  
M. E. Figueroa
Keyword(s):  
Spartina Densiflora ◽  
Zinc Stress ◽  
Photosynthetic Responses ◽  
Invasive Cordgrass

The Effect of Silicon on the Activity and Isozymes Pattern of Antioxidative Enzymes of Young Maize Roots under Zinc Stress

Silicon ◽  
2016 ◽  
Vol 10 (6) ◽  
pp. 2907-2910 ◽  
Author(s):  
Lenka Šimková ◽  
Ivana Fialová ◽  
Miroslava Vaculíková ◽  
Miroslava Luxová
Keyword(s):  
Antioxidative Enzymes ◽  
Zinc Stress ◽  
Maize Roots

scholarly journals Divalent nutrient cations: friend and foe during zinc stress in rice

2020 ◽  
Author(s):  
Boon Huat Cheah ◽  
Yu Ling Chen ◽  
Jing Chi Lo ◽  
I Chien Tang ◽  
Kuo Chen Yeh ◽  
...  
Keyword(s):  
Zinc Stress

scholarly journals Effect of Zinc on Microcystis aeruginosa UTEX LB 2385 and Its Toxin Production

Toxins ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 92 ◽  
Author(s):  
Jose L. Perez ◽  
Tinchun Chu
Keyword(s):  
Flow Cytometry ◽  
Stress Response ◽  
Microcystis Aeruginosa ◽  
Stress Responses ◽  
Algal Blooms ◽  
Phase Contrast ◽  
Phase Contrast Microscopy ◽  
Zinc Stress ◽  
Cell Quota ◽  
Contrast Microscopy

Cyanobacteria harmful algal blooms (CHABs) are primarily caused by man-made eutrophication and increasing climate-change conditions. The presence of heavy metal runoff in affected water systems may result in CHABs alteration to their ecological interactions. Certain CHABs produce by-products, such as microcystin (MC) cyanotoxins, that have detrimentally affected humans through contact via recreation activities within implicated water bodies, directly drinking contaminated water, ingesting biomagnified cyanotoxins in seafood, and/or contact through miscellaneous water treatment. Metallothionein (MT) is a small, metal-sequestration cysteine rich protein often upregulated within the stress response mechanism. This study focused on zinc metal resistance and stress response in a toxigenic cyanobacterium, Microcystis aeruginosa UTEX LB 2385, by monitoring cells with (0, 0.1, 0.25, and 0.5 mg/L) ZnCl2 treatment. Flow cytometry and phase contrast microscopy were used to evaluate physiological responses in cultures. Molecular assays and an immunosorbent assay were used to characterize the expression of MT and MC under zinc stress. The results showed that the half maximal inhibitory concentration (IC50) was 0.25 mg/L ZnCl2. Flow cytometry and phase contrast microscopy showed morphological changes occurred in cultures exposed to 0.25 and 0.5 mg/L ZnCl2. Quantitative PCR (qPCR) analysis of selected cDNA samples showed significant upregulation of Mmt through all time points, significant upregulation of mcyC at a later time point. ELISA MC-LR analysis showed extracellular MC-LR (µg/L) and intracellular MC-LR (µg/cell) quota measurements persisted through 15 days, although 0.25 mg/L ZnCl2 treatment produced half the normal cell biomass and 0.5 mg/L treatment largely inhibited growth. The 0.25 and 0.5 mg/L ZnCl2 treated cells demonstrated a ~40% and 33% increase of extracellular MC-LR(µg/L) equivalents, respectively, as early as Day 5 compared to control cells. The 0.5 mg/L ZnCl2 treated cells showed higher total MC-LR (µg/cell) quota yield by Day 8 than both 0 mg/L ZnCl2 control cells and 0.1 mg/L ZnCl2 treated cells, indicating release of MCs upon cell lysis. This study showed this Microcystis aeruginosa strain is able to survive in 0.25 mg/L ZnCl2 concentration. Certain morphological zinc stress responses and the upregulation of mt and mcy genes, as well as periodical increased extracellular MC-LR concentration with ZnCl2 treatment were observed.

MAPKs as a cross point in H2O2 and auxin signaling under combined cadmium and zinc stress in rice roots

2014 ◽  
Vol 61 (5) ◽  
pp. 608-618 ◽  
Author(s):  
F. Y. Zhao ◽  
M. M. Han ◽  
S. Y. Zhang ◽  
J. Ren ◽  
F. Hu ◽  
...  
Keyword(s):  
Auxin Signaling ◽  
Cross Point ◽  
Zinc Stress ◽  
Rice Roots

scholarly journals UropathogenicEscherichia coliemploys both evasion and resistance to subvert innate immune-mediated zinc toxicity for dissemination

2019 ◽  
Vol 116 (13) ◽  
pp. 6341-6350 ◽  
Author(s):  
Claudia J. Stocks ◽  
Minh-Duy Phan ◽  
Maud E. S. Achard ◽  
Nguyen Thi Khanh Nhu ◽  
Nicholas D. Condon ◽  
...  
Keyword(s):  
Insertion Site ◽  
Multidrug Resistant ◽  
Innate Immune ◽  
Zinc Toxicity ◽  
Human Macrophages ◽  
Zinc Stress ◽  
Immune Mediated ◽  
Systemic Spread ◽  
Tract Infections ◽  
K 12

Toll-like receptor (TLR)-inducible zinc toxicity is a recently described macrophage antimicrobial response used against bacterial pathogens. Here we investigated deployment of this pathway against uropathogenicEscherichia coli(UPEC), the major cause of urinary tract infections. Primary human macrophages subjected EC958, a representative strain of the globally disseminated multidrug-resistant UPEC ST131 clone, to zinc stress. We therefore used transposon-directed insertion site sequencing to identify the complete set of UPEC genes conferring protection against zinc toxicity. Surprisingly, zinc-susceptible EC958 mutants were not compromised for intramacrophage survival, whereas corresponding mutants in the nonpathogenicE. coliK-12 strain MG1655 displayed significantly reduced intracellular bacterial loads within human macrophages. To investigate whether the intramacrophage zinc stress response of EC958 reflected the response of only a subpopulation of bacteria, we generated and validated reporter systems as highly specific sensors of zinc stress. Using these tools we show that, in contrast to MG1655, the majority of intramacrophage EC958 evades the zinc toxicity response, enabling survival within these cells. In addition, EC958 has a higher tolerance to zinc than MG1655, with this likely being important for survival of the minor subset of UPEC cells exposed to innate immune-mediated zinc stress. Indeed, analysis of zinc stress reporter strains and zinc-sensitive mutants in an intraperitoneal challenge model in mice revealed that EC958 employs both evasion and resistance against zinc toxicity, enabling its dissemination to the liver and spleen. We thus demonstrate that a pathogen of global significance uses multiple mechanisms to effectively subvert innate immune-mediated zinc poisoning for systemic spread.

scholarly journals Natural and laboratory mutations in kuzbanian are associated with zinc stress phenotypes in Drosophila melanogaster

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Hung Le Manh ◽  
Lain Guio ◽  
Miriam Merenciano ◽  
Quirze Rovira ◽  
Maite G. Barrón ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Zinc Stress

MiR1444a Is Involved in the Response of Populus trichocarpa to Zinc Stress

2012 ◽  
Vol 42 (10) ◽  
pp. 850-860 ◽  
Author(s):  
ShanFa LU ◽  
HaiYing WANG ◽  
LiChai YUAN ◽  
XiuNa CUI ◽  
XiangYun WU ◽  
...  
Keyword(s):  
Populus Trichocarpa ◽  
Zinc Stress
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