Cellular Mechanisms in Higher Plants Governing Tolerance to Cadmium Toxicity

2014 ◽  
Vol 33 (5) ◽  
pp. 374-391 ◽  
Author(s):  
Girish Choppala ◽  
Saifullah ◽  
Nanthi Bolan ◽  
Sadia Bibi ◽  
Muhammad Iqbal ◽  
...  
Keyword(s):  
Higher Plants ◽  
Cadmium Toxicity ◽  
Cellular Mechanisms ◽  
Tolerance To Cadmium

scholarly journals Root excretion and plant tolerance to cadmium toxicity - a review

2008 ◽  
Vol 53 (No. 5) ◽  
pp. 193-200 ◽  
Author(s):  
J. Dong ◽  
W.H. Mao ◽  
G.P. Zhang ◽  
F.B. Wu ◽  
Y. Cai
Keyword(s):  
Root Exudates ◽  
Anthropogenic Activities ◽  
Cadmium Toxicity ◽  
Research Work ◽  
Future Research ◽  
Rhizosphere Ph ◽  
Plant Tolerance ◽  
Rhizosphere Environment ◽  
Safe Food ◽  
Tolerance To Cadmium

Significant quantities of Cd have been added to soils globally due to various anthropogenic activities, posing a serious threat to safe food production and human health. Rhizosphere, as an important interface of soil and plant, plays a significant role in the agro-environmental system. This article presents a review of relationship between root excretion and microorganisms and plant resistance to Cd toxicity and possible mechanisms. Root exudates markedly altered in species and quantity under Cd stress. Root exudates can affect Cd absorption by plants through changing the physical and chemical characteristics of rhizospheres. The influence of root exudates on Cd bioavailability and toxicity may include modifying the rhizosphere pH and Eh, chelating/complexing and depositing with Cd ions, and altering the community construction, the numbers and activities of rhizospheric microbes. In this paper, the methods to reduce the transfer of Cd in soil-plant system by adjusting rhizosphere environment are discussed, and some aspects are also proposed that should be emphasized in the future research work.

scholarly journals Cadmium toxicity in plants

2005 ◽  
Vol 17 (1) ◽  
pp. 21-34 ◽  
Author(s):  
María P. Benavides ◽  
Susana M. Gallego ◽  
María L. Tomaro
Keyword(s):  
Metal Ions ◽  
Cadmium Toxicity ◽  
Environmental Pollutants ◽  
Environmental Pollutant ◽  
Present Knowledge ◽  
Plant Responses ◽  
Cellular Mechanisms ◽  
Higher Plant ◽  
Potential Damage

Heavy metals are important environmental pollutants and their toxicity is a problem of increasing significance for ecological, evolutionary, nutritional, and environmental reasons. Plants posses homeostatic cellular mechanisms to regulate the concentration of metal ions inside the cell to minimize the potential damage that could result from the exposure to nonessential metal ions. This paper summarizes present knowledge in the field of higher plant responses to cadmium, an important environmental pollutant. Knowledge concerning metal toxicity, including mechanisms of cadmium homeostasis, uptake, transport and accumulation are evaluated. The role of the cell wall, the plasma membrane and the mycorrhizas, as the main barriers against cadmium entrance to the cell, as well as some aspects related to phytochelatin-based sequestration and compartmentalization processes are also reviewed. Cadmium-induced oxidative stress was also considered as one of the most studied topics of cadmium toxicity.

Absence of Changes in Metallothionein RNA in the Rat Testes Made Refractory to Cadmium Toxicity by Zinc Pretreatment

1994 ◽  
Vol 13 (1) ◽  
pp. 65-67 ◽  
Author(s):  
Zakaria Z. Wahba ◽  
Mark Steven Miller ◽  
Michael P. Waalkes
Keyword(s):  
Low Dose ◽  
Interstitial Cell ◽  
Cadmium Toxicity ◽  
Cdna Probe ◽  
Testicular Toxicity ◽  
Slot Blot ◽  
Tissue Resistance ◽  
Blot Technique ◽  
Induced Tolerance ◽  
Tolerance To Cadmium

Testicular toxicity and interstitial cell tumours induced by cadmium are prevented by zinc or by low dose cadmium pretreatments. The mechanism of this tolerance is unknown, though metallothionein (MT) is thought to play a role in tissue resistance to cadmium toxicity. Thus, the possible involvement of the testicular MT gene in metal-induced tolerance to cadmium toxicity was studied. Rats were pretreated with zinc (1.0 mmol kg-1, s.c.). Histological examination of the testes indicated such pretreatments prevented the necrotizing effects of subsequent doses of cadmium (20 ?mol kg-1, s.c.) administered 24 h later. RNA was extracted from testes or liver 24 h after zinc pretreatment, and analysed by the slot blot technique using the p2A10 cDNA probe to the MT gene. Zinc pretreatment had little effect on MT RNA in the testes, and such pretreatments did not alter testicular cadmium-binding protein capacity. In contrast, RNAs derived from livers of zinc pretreated rats showed marked increases in MT RNA and MT protein. Hence, the testicular MT gene does not appear to play a major role in the induced tolerance to cadmium toxicity and carcinogenesis generated by zinc.

scholarly journals A cadmium stress-responsive gene AtFC1 confers plant tolerance to cadmium toxicity

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Jun Song ◽  
Sheng Jun Feng ◽  
Jian Chen ◽  
Wen Ting Zhao ◽  
Zhi Min Yang
Keyword(s):  
Cadmium Toxicity ◽  
Cadmium Stress ◽  
Plant Tolerance ◽  
Responsive Gene ◽  
Tolerance To Cadmium

Lectin involvement in the development of wheat tolerance to cadmium toxicity

2011 ◽  
Vol 58 (6) ◽  
pp. 1048-1054 ◽  
Author(s):  
M. V. Bezrukova ◽  
R. A. Fatkhutdinova ◽  
A. R. Lubyanova ◽  
A. R. Murzabaev ◽  
V. V. Fedyaev ◽  
...  
Keyword(s):  
Cadmium Toxicity ◽  
Tolerance To Cadmium

scholarly journals The Mammalian Circadian Timing System and the Suprachiasmatic Nucleus as Its Pacemaker

Biology ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 13 ◽  
Author(s):  
Michael H. Hastings ◽  
Elizabeth S. Maywood ◽  
Marco Brancaccio
Keyword(s):  
Circadian Clock ◽  
Suprachiasmatic Nucleus ◽  
Higher Plants ◽  
Molecular Genetic ◽  
Model Organisms ◽  
Cellular Mechanisms ◽  
Molecular Genetic Basis ◽  
New Directions ◽  
Circadian Timing System ◽  
Definition Of

The past twenty years have witnessed the most remarkable breakthroughs in our understanding of the molecular and cellular mechanisms that underpin circadian (approximately one day) time-keeping. Across model organisms in diverse taxa: cyanobacteria (Synechococcus), fungi (Neurospora), higher plants (Arabidopsis), insects (Drosophila) and mammals (mouse and humans), a common mechanistic motif of delayed negative feedback has emerged as the Deus ex machina for the cellular definition of ca. 24 h cycles. This review will consider, briefly, comparative circadian clock biology and will then focus on the mammalian circadian system, considering its molecular genetic basis, the properties of the suprachiasmatic nucleus (SCN) as the principal circadian clock in mammals and its role in synchronising a distributed peripheral circadian clock network. Finally, it will consider new directions in analysing the cell-autonomous and circuit-level SCN clockwork and will highlight the surprising discovery of a central role for SCN astrocytes as well as SCN neurons in controlling circadian behaviour.

Symbiosis between Rhizobium leguminosarum bv. trifolii strain TA1 and a white clover cultivar benefits clover tolerance to cadmium toxicity

2019 ◽  
Vol 63 (3) ◽  
pp. 353-364
Author(s):  
Sandra D. Young ◽  
Chikako van Koten ◽  
Colin W. Gray ◽  
Jo Anne E. Cavanagh ◽  
Steve A. Wakelin
Keyword(s):  
White Clover ◽  
Rhizobium Leguminosarum ◽  
Cadmium Toxicity ◽  
Tolerance To Cadmium
Sign in / Sign up

Export Citation Format

Share Document