Phenolic metabolism and related heavy metal tolerance mechanism in Kandelia Obovata under Cd and Zn stress

Chen, Shan; Wang, Qiang; Lu, Haoliang; Li, Junwei; Da-yuan, Yang; Liu, Jingchun; Yan, Chongling

doi:10.1016/j.ecoenv.2018.11.004

Cited by 125 publications

(62 citation statements)

References 59 publications

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“…Our studies also corroborate with the findings of Chen, et al [76] in Kandelia obovata under Cd and Zn toxicity who reported a higher accumulation of total phenols in the plant tissues during metal stressed conditions. According to their speculation, the phenols act as chelators and participate in defense action in plants under environmental adversities due to which their levels were raised during metal toxicity [76]. In addition, plants also accumulate higher levels of phenolics to effectively scavenge metal ions or ROS that signifies them as most appropriate detoxifying agent [77].…”

Section: Discussionsupporting

confidence: 93%

“…Moreover, the higher accumulation of phenolic compounds was observed in red cabbage seedlings when exposed to Cu toxicity and the accumulation was due to increased PAL activity [75]. Our studies also corroborate with the findings of Chen, et al [76] in Kandelia obovata under Cd and Zn toxicity who reported a higher accumulation of total phenols in the plant tissues during metal stressed conditions. According to their speculation, the phenols act as chelators and participate in defense action in plants under environmental adversities due to which their levels were raised during metal toxicity [76].…”

Section: Discussionsupporting

confidence: 91%

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Microbial Fortification Improved Photosynthetic Efficiency and Secondary Metabolism in Lycopersicon esculentum Plants Under Cd Stress

et al. 2019

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Environmental stress including heavy metal pollution is increasing at high speed and is polluting the cultivable land. Consequently, it results in affecting human population through entering into food chain. The current study aims that Cd stress (0.4 mM) led to toxicity and deleterious effects on 45-day-old Lycopersicon esculentum plants. The use of rhizobacterial strains underlines the main hypothesis of the present research that have been exploited in order to alleviate the Cd induced stress in plants and promoting their growth sidewise. The morphological parameters, plant pigments, and gaseous exchange parameters were estimated and found to be reduced in plants due to Cd toxicity. Along with this, the levels of phenolic compounds and osmoprotectants were stimulated in plants raised in Cd spiked soils. In addition, free amino acid content was reduced in plants under Cd treatment. It was revealed that these bacterial strains Pseudomonas aeruginosa (M1) and Burkholderia gladioli (M2) when inoculated to tomato plants improved the morphological characteristics and enhanced photosynthetic attributes. Moreover, the level of phenolic compounds and osmoprotectants were further enhanced by both the inoculating agents independently. However, in situ localization studies of phenol accumulation in root sections was found to be enhanced in Cd treated plants as revealed through higher intensity of yellowish-brown colour. The supplementation of bacterial strains further accumulated the phenols in Cd stressed root sections as evidenced through increased colour intensity. Therefore, the present study suggested that bacterial strains mitigates Cd stress from tomato plants through improving morphological, physiological and metabolite profiles. Consequently, the present research advocates the best utilization of rhizobacteria as stress alleviators for sustainable agriculture.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 91%

Microbial Fortification Improved Photosynthetic Efficiency and Secondary Metabolism in Lycopersicon esculentum Plants Under Cd Stress

et al. 2019

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“…Under metal toxicity, accumulation of specific flavonoids which are involved in aiding to the plant’s defense mechanism is also enhanced including anthocyanins and flavonols [72,94,95,96]. Accumulation of phenolic compounds is due to the up-regulation of the biosynthesis of phenylpropanoid enzymes including phenylalanine ammonia-lyase, chalcone synthase, shikimate dehydrogenase, cinnamyl alcohol dehydrogenase, and polyphenol oxidase [95,97], which in turn, is dependent on the modulation of transcript levels of genes encoding biosynthetic enzymes under metal stress [72,85]. Flavonoids are also known for their scavenging capability of H 2 O 2 and are considered to play a crucial role in the phenolic/ascorbate-peroxidase cycle [98,99].…”

Section: Response and Role Of Endogenous Phenolics In Plants Againmentioning

confidence: 99%

Response of Phenylpropanoid Pathway and the Role of Polyphenols in Plants under Abiotic Stress

et al. 2019

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Phenolic compounds are an important class of plant secondary metabolites which play crucial physiological roles throughout the plant life cycle. Phenolics are produced under optimal and suboptimal conditions in plants and play key roles in developmental processes like cell division, hormonal regulation, photosynthetic activity, nutrient mineralization, and reproduction. Plants exhibit increased synthesis of polyphenols such as phenolic acids and flavonoids under abiotic stress conditions, which help the plant to cope with environmental constraints. Phenylpropanoid biosynthetic pathway is activated under abiotic stress conditions (drought, heavy metal, salinity, high/low temperature, and ultraviolet radiations) resulting in accumulation of various phenolic compounds which, among other roles, have the potential to scavenge harmful reactive oxygen species. Deepening the research focuses on the phenolic responses to abiotic stress is of great interest for the scientific community. In the present article, we discuss the biochemical and molecular mechanisms related to the activation of phenylpropanoid metabolism and we describe phenolic-mediated stress tolerance in plants. An attempt has been made to provide updated and brand-new information about the response of phenolics under a challenging environment.

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“…Many reports have demonstrated that enhanced production of phenolic compounds under HM stress can protect from oxidative damage [163,164]. The accumulation of phenolics is principally driven by increased expression of enzymes responsible for phenylpropanoid biosynthesis such as phenylalanine ammonia-lyase, chalcone synthase, shikimate dehydrogenase, cinnamyl alcohol dehydrogenase, and polyphenol oxidase [165,166]. Many studies have documented the role of phytohormones in enhancing the level of some classes of polyphenols, such as anthocyanins [167,168].…”

Section: Polyphenolsmentioning

confidence: 99%

The Role of Salicylic Acid in Plants Exposed to Heavy Metals

Sidhu²,

et al. 2020

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Salicylic acid (SA) is a very simple phenolic compound (a C7H6O3 compound composed of an aromatic ring, one carboxylic and a hydroxyl group) and this simplicity contrasts with its high versatility and the involvement of SA in several plant processes either in optimal conditions or in plants facing environmental cues, including heavy metal (HM) stress. Nowadays, a huge body of evidence has unveiled that SA plays a pivotal role as plant growth regulator and influences intra- and inter-plant communication attributable to its methyl ester form, methyl salicylate, which is highly volatile. Under stress, including HM stress, SA interacts with other plant hormones (e.g., auxins, abscisic acid, gibberellin) and promotes the stimulation of antioxidant compounds and enzymes thereby alerting HM-treated plants and helping in counteracting HM stress. The present literature survey reviews recent literature concerning the roles of SA in plants suffering from HM stress with the aim of providing a comprehensive picture about SA and HM, in order to orientate the direction of future research on this topic.

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Phenolic metabolism and related heavy metal tolerance mechanism in Kandelia Obovata under Cd and Zn stress

Cited by 125 publications

References 59 publications

Microbial Fortification Improved Photosynthetic Efficiency and Secondary Metabolism in Lycopersicon esculentum Plants Under Cd Stress

Microbial Fortification Improved Photosynthetic Efficiency and Secondary Metabolism in Lycopersicon esculentum Plants Under Cd Stress

Response of Phenylpropanoid Pathway and the Role of Polyphenols in Plants under Abiotic Stress

The Role of Salicylic Acid in Plants Exposed to Heavy Metals

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