Physiological changes induced by chromium stress in plants: an overview

Hayat, Shamsul; Khalique, Gulshan; Irfan, Mohammad; Wani, Arif Shafi; Tripathi, Bhumi Nath; Ahmad, Aqil

doi:10.1007/s00709-011-0331-0

Cited by 227 publications

(100 citation statements)

References 97 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Salix caprea, a marked decrease in total root area was observed after exposure to Zn, Cd or a combination of both metals (Vaculík et al 2012). Abnormalities in metal-stressed plants frequently described in the literature include decreased elongation of the primary root, impaired secondary growth, increased root dieback and reduced root hair surface: Ag (Anjum et al 2013), As (Garg and Singla 2011;Panda et al 2010;Sharma 2012), Cd (Gallego et al 2012;Lux et al 2011), Co (Collins and Kinsela 2011), Cr (Chandra and Kulshreshtha 2004;Hayat et al 2012b;Shanker et al 2005), Cu (Burkhead et al 2009), Hg (Chen and Yang 2012), Ni (Sreekanth et al 2013), Pb (Fahr et al 2013;Feleafel and Mirdad 2013;Sharma and Dubey 2005), Zn (Broadley et al 2007;Ivanov et al 2003). Metal-induced structural changes lead to inadequate root-soil contact and lower the capacity of plants to exploit the water from the soil.…”

Section: Effects Of Heavy Metals On Water Uptakementioning

confidence: 99%

Water relations in plants subjected to heavy metal stresses

2016

View full text Add to dashboard Cite

Concentrations of heavy metals in soil seldom reach a level sufficient to cause osmotic disturbances in plants. It is likely that water entry to the roots is indirectly governed by other factors which are themselves affected by metals. Decreased elongation of the primary root, impaired secondary growth, increased root dieback, or reduced root hair caused by toxic ions all exert a deleterious effect on the root-absorbing area and water uptake. Moreover, metals are able to decelerate short-distance water transfer both in symplast and apoplast, which in turn reduce the movement of water into the vascular system and affect water supply to the shoot. Long-distance transport is limited also due to decreased hydraulic conductivity in the root, stem and leaf midrib caused by a reduction in the size of vessels and tracheids, and partial blockage of xylem elements by cellular debris or gums. Heavy metals influence water delivery to the shoot due to inhibition of transpiration as they decrease the size of the leaves and the thickness of the lamina, reduce intercellular spaces, affect the density of stomata and decrease their aperture. Stomata closure is induced by direct interaction of toxic metals with guard cells and/or as a consequence of the early effects of metal toxicity on roots and stems. In metal-stressed plants, rootderived ABA or ABA-induced signals might play a role in stomatal movement. Disturbances in water relations trigger differential regulation of aquaporin gene expression, which may contribute to further reductions in water loss.

show abstract

Section: Effects Of Heavy Metals On Water Uptakementioning

confidence: 99%

Water relations in plants subjected to heavy metal stresses

2016

View full text Add to dashboard Cite

show abstract

“…In agreement with our results, Contreras et al [49], Jouili et al [50], and Arunakumara et al [51] demonstrated that, when the concentration of HM is changed, the plants produce a different content of lipid peroxidation, which leads to the damage of the biological molecules. In conclusion, the excess of metals involves the induction of lipid peroxidation in plants, which causes the degradation of lipoprotein membrane by lipid peroxidation, which could also include the degradation of photosynthetic pigments, causing deterioration in growth [52]. The presence of stress-tolerant mycorrhyzal fungi could reduce MDA content according to González-Guerrero et al [53] and Abdel Latef [48].…”

Section: Resultsmentioning

confidence: 99%

Heavy Metal-Induced Differential Responses to Oxidative Stress and Protection by Mycorrhization in Sunflowers Grown in Lab and Field Scales

Paun¹,

Neagoe²,

Paun³

et al. 2015

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Heavy metals (HM) are some of the most frequent soil contaminants and a cause for long-term loss of soils, for destruction of natural habitats, loss of agricultural and inhabitable soils, and numerous health problems for wildlife and the human population. Reactive oxygen species (ROS) are generated during the normal metabolism of plants and activated by both biotic and abiotic stressors such as HM [1]. They are key messengers in plant responses to HM stress as part of their defense and adaptation mechanisms, either directly, by disturbing electron transport, or indirectly, by disturbing metabolic reactions, inactivation, and down-regulation of stress response enzymes and depletion of antioxidant substrates [2,3]. They also affect the photosynthetic system at many levels, leading to Pol. J. Environ. Stud. Vol. 24, No. 3 (2015), [1235][1236][1237][1238][1239][1240][1241][1242][1243][1244][1245][1246][1247] AbstractThe influence of arbuscular mycorrhizal (AM) fungi (Glomus intraradices) and of heavy metal stress on the characteristics of biomass production, as well as non-enzymatic and enzymatic variables in the roots, shoots, and leaves of sunflower (Helianthus annuus L.) plants were studied at pot and field scales. The intensity of the mycorrhizal colonization (M%) and the arbuscular abundance in the root system (A%) were found to be higher in the sunflower grown at lab scale (artificially inoculated) than that grown at field scale (natively inoculated). Thus, the AM symbiosis with the sunflower root system exposed to a different degree of pollution had a differential protective effect on plants at lab and field scales. A huge biomass of sunflower was harvested from the field compared to that obtained from the lab experiment. Furthermore, after measuring the biochemical variables of the plant parts, the results indicated a decrease in field for the superoxide dismutase and peroxidase activity, for the lipid peroxidation content, and for the assimilating pigments, while all quantified variables showed almost the same pattern of variation in all three plant parts. Consequently, it can be concluded that it is possible to use biochemical response variables, which in the case of our study are consistent with the protective effect of the fungus, as environmental biomarkers for soils with moderate pollution.

show abstract

“…Furthermore, it was reported that leaf surface area is also significantly correlated to yield of the plant (Pandey et al, 2016;Patel and Patra, 2015). Photosynthetic apparatus are a very sensitive parameters to heavy metal stress (Hayat et al, 2012). Therefore, decrease in chlorophyll content is an important determinant of metal toxicity (Hassan et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Effects of cadmium-induced stress on essential oil production, morphology and physiology of lemon balm (Melissa officinalis L., Lamiaceae)

Kılıç¹

2017

Appl Ecol Env Res

View full text Add to dashboard Cite

Abstract. Secondary metabolites, which have an important role in regulating plants' relationship with the environment, are affected by soil pollution. Thus, it is important to describe the mechanism in which lemon balm's (Melissa officinalis L. subsp. officinalis) secondary metabolite accumulation is affected by Cadmium (Cd) stress. For this purpose, lemon balms seedlings that were grown in a controlled environment were exposed to increasing Cd stress and the relationship of lemon balm's growth and development with EO (essential oil) accumulation were investigated. Morphological, anatomical and physiological parameters of plants' that were exposed to Cd significantly decreased in parallel with increasing Cd concentration. Impairments in growth and development of lemon balm due to increasing Cd concentrations also affected EO accumulation. However, this destructive effect was most evident on EO accumulation amongst all investigated parameters. Furthermore, amount of EO decreased by 97%, at the highest concentration. In conclusion, Cd might have damaged both the EO producing mechanism and the structures that produce EO by inhibiting plant growth. Therefore it is important to reveal the responses of all parameters which affect EO production of medicinal plants under various stress conditions.

show abstract

Physiological changes induced by chromium stress in plants: an overview

Cited by 227 publications

References 97 publications

Water relations in plants subjected to heavy metal stresses

Water relations in plants subjected to heavy metal stresses

Heavy Metal-Induced Differential Responses to Oxidative Stress and Protection by Mycorrhization in Sunflowers Grown in Lab and Field Scales

Effects of cadmium-induced stress on essential oil production, morphology and physiology of lemon balm (Melissa officinalis L., Lamiaceae)

Contact Info

Product

Resources

About