Phytohormones-induced senescence efficiently promotes the transport of cadmium from roots into shoots of plants: A novel strategy for strengthening of phytoremediation

Zhu, Huihui; Chen, Liang; Xing, Wei; Ran, Shangmin; Wei, Zhihui; Amee, Maurice; Wassie, Misganaw; Niu, Hong; Tang, Diyong; Du, Dongyun; Yao, Jun; Hou, Haobo; Chen, Ke; Sun, Jutang

doi:10.1016/j.jhazmat.2020.122080

Cited by 60 publications

(21 citation statements)

References 79 publications

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“…Previous studies demonstrated that endogenous ABA accumulation in the leaves contributed to promoting tolerance to heavy metal stress in NM plants [ 13 , 39 ]. Zhu et al [ 7 ] suggested that the combined use of ABA and salicylic acid could promote Cd accumulation in senescent leaves to prevent young leaves from injury caused by Cd stress. These results suggested that NM plants may have coped with Zn toxicity by increasing ABA accumulation in the leaves, which was unfavorable to the growth of aerial plant parts.…”

Section: Discussionmentioning

confidence: 99%

“…Consequently, plants have evolved various mechanisms to circumvent the adverse effects caused by excessive concentrations of metals: restricting metal transport to the aboveground parts [ 4 ] and decreasing heavy metal accumulation [ 5 ]. In addition, phytohormones such as cytokinins, abscisic acid, and salicylic acid (SA) are indicated to promote plant tolerance to heavy metal stress by increasing plant biomass and regulating the transport of HMs [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

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The Synergy of Arbuscular Mycorrhizal Fungi and Exogenous Abscisic Acid Benefits Robinia pseudoacacia L. Growth through Altering the Distribution of Zn and Endogenous Abscisic Acid

Lou

Zhang

et al. 2021

JoF

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The simultaneous effects of arbuscular mycorrhizal (AM) fungi and abscisic acid (ABA) on the tolerance of plants to heavy metal (HM) remain unclear. A pot experiment was carried out to clarify the effects of simultaneous applications of AM fungi and ABA on plant growth, Zn accumulation, endogenous ABA contents, proline metabolism, and the oxidative injury of black locust (Robinia pseudoacacia L.) exposed to excess Zn stress. The results suggested that exogenously applied ABA positively enhanced AM colonization, and that the growth of plants only with AM fungi was improved by ABA application. Under Zn stress, AM inoculation and ABA application increased the ABA content in the root/leaf (increased by 48–172% and 92%, respectively) and Zn content in the root/shoot (increased by 63–152% and 61%, respectively) in AM plants, but no similar trends were observed in NM plants. Additionally, exogenous ABA addition increased the proline contents of NM roots concomitantly with the activities of the related synthases, whereas it reduced the proline contents and the activity of Δ1-pyrroline-5-carboxylate synthetase in AM roots. Under Zn stress, AM inoculation and ABA application decreased H2O2 contents and the production rate of O2, to varying degrees. Furthermore, in the roots exposed to Zn stress, AM inoculation augmented the activities of SOD, CAT, POD and APX, and exogenously applied ABA increased the activities of SOD and POD. Overall, AM inoculation combined with ABA application might be beneficial to the survival of black locust under Zn stress by improving AM symbiosis, inhibiting the transport of Zn from the roots to the shoots, increasing the distribution of ABA in roots, and stimulating antioxidant defense systems.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Synergy of Arbuscular Mycorrhizal Fungi and Exogenous Abscisic Acid Benefits Robinia pseudoacacia L. Growth through Altering the Distribution of Zn and Endogenous Abscisic Acid

Lou

Zhang

et al. 2021

JoF

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“…The Cd and arsenic (As) concentration of senescent leaves in rice increased significantly compared young leaves ( Shi G. L. et al, 2019 ). Plant senescence induced by abscisic acid (ABA) and SA contributes to the transportation of heavy metals, and Cd content in shoots of Festuca arundinacea S. increases significantly ( Hza et al, 2020 ). We speculate that this is the adaptive strategy of ZCR for resisting Cd toxicity.…”

Section: Discussionmentioning

confidence: 99%

“…Studies on the response of plants such as Arabidopsis , Solanum tuberosum , Sedum alfredii , Malus hupehensis to heavy metal Cd have shown that ABA plays a positive role in alleviating the accumulation and toxicity of heavy metals and metalloid compounds ( Stroiński et al, 2013 ; Sheng et al, 2018 ; Han et al, 2019 ; Tao et al, 2019 ; Zhang W. et al, 2019 ). Three major pathways involved in the detoxification of toxic metals can be triggered by ABA, inhibiting the uptake ( Zhang L. et al, 2019 ; Pan et al, 2020 ), altering the translocation from root to shoot ( Pompeu et al, 2017 ; Shi W. G. et al, 2019 ; Hza et al, 2020 ), and promoting the conjugation with chelators ( Lu et al, 2020 ). Hsu and Kao (2008) found that regulation of endogenous ABA biosynthesis can reduce Cd uptake by rice seedlings ( Hsu and Kao, 2008 ).…”

Section: Discussionmentioning

confidence: 99%

“…ZCR showed some similarities with LT and ZLT in growth characteristics, Cd accumulation and distribution characteristics ( Figure 3 ), but the internal regulatory mechanisms were still different. We speculated that ABA played vital role in Cd transportation of hybrids and Cd distribution in senescent and normal leaves ( Pereira et al, 2017 ; Shi W. G. et al, 2019 ; Hza et al, 2020 ). The relationship among the ABA synthesis and signal transduction, Cd absorption, and transportation, and plant senescence requires further investigation to reveal detailed mechanisms involved in Cd distribution and accumulation in plants.…”

Section: Discussionmentioning

confidence: 99%

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Hybridization With an Invasive Plant of Xanthium strumarium Improves the Tolerance of Its Native Congener X. sibiricum to Cadmium

et al. 2021

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Hybridization is one of the important factors influencing the adaptive evolution of invasive plants. According to previous studies, hybridization with an invasive plant reduces the adaptability of its native congener to environment. However, in this study, the hybridization with an invasive plant of Xanthium strumarium (LT) improves the tolerance and accumulation of its native congener Xanthium sibiricum (CR) to cadmium (Cd). Under Cd stress, X. sibiricum♀ × X. strumarium♂ (ZCR) showed higher biomass and Cd accumulation. Compared with CR, ZCR has longer vegetative and reproductive growth time. Moreover, ZCR adopted more reasonable biomass allocation strategy. ZCR increased the proportion of reproductive allocation and ensured its own survival with the increase of Cd stress. Furthermore, ZCR increased the translocation of Cd to aboveground parts and changed the distribution of Cd. A large amount of Cd is stored in senescent leaves and eliminated from the plant when the leaves fall off, which not only reduces the Cd content in the plant, but also reduces the toxicity of Cd in the normal leaves. Transcriptome analysis shows a total of 2055 (1060 up and 995 down) differentially expressed genes (DEGs) were detected in the leaves of Cd-stressed ZCR compared with CR, while only 792 (521 up and 271 down) were detected in X. strumarium♀ × X. sibiricum♂ (ZLT) compared with LT. A large number of DGEs in ZCR and ZLT are involved in abscisic acid (ABA) synthesis and signal transduction. The genes induced by ABA in ZCR, including CNGC5/20, CPK1/28, CML, PTI1-like tyrosine-protein kinase 3, respiratory burst oxidase homolog protein C, and WRKY transcription factor 33 were found differentially expressed compared CR. carotenoid cleavage dioxygenase 4, NCED1/2, phytoene synthase 2, and CYP707A involved in ABA synthesis and decomposition in ZLT were found differentially expressed compared LT. We speculated that ABA played an important role in Cd transportation of hybrids and Cd distribution in senescent and normal leaves. The results demonstrate that hybridization with an invasive plant improves the adaptability of the hybrid to Cd stress and may enhance the extinction risk of native congener in pollution environment.

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Geochemical Interaction and Bioavailability of Zinc in Soil Under Long‐Term Integrated Nutrient Management in Pearl Millet–Wheat System

Saroha,

Yadav,

Mukhopadhyay

et al. 2024

CLEAN Soil Air Water

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The degree and severity of zinc (Zn) deficiency in soil reduced the agricultural yield and quality, thus encouraging malnutrition in humans worldwide. The study was hypothesized to increase the bioavailability and release of Zn in soil and Zn biofortification in wheat grains under integrated nutrient management (INM). The long‐term (54 years) experiment laid out in a split‐plot design comprising single (W) and dual (PW) applications of farmyard manure (FYM) (0, 5, 10, and 15 Mg ha−1) and nitrogen (0, 60, and 120 kg ha−1) was studied to understand the distribution of different Zn fractions in soil and their relationship to wheat grain yield and Zn uptake. A laboratory incubation study was performed on surface soils to evaluate the release kinetics of native Zn at field capacity. The different fractions of Zn in soil increased with increasing frequency and levels of FYM application. Residual Zn constituted the maximum proportion (89.03%) of total soil Zn. A high positive correlation (p < 0.01) of diethylenetriaminepentaacetic acid (DTPA)‐extractable Zn and total grain Zn content were observed with different Zn fractions. The release kinetics of native soil Zn increased up to 10 days and became almost constant, indicating the establishment of chemical equilibria between the soil solid and solution phase. Thus, long‐term INM ensured higher wheat production (6.08 Mg ha−1) and Zn biofortification (38.95 mg kg−1) to combat Zn malnutrition and achieve the United Nations’ sustainable development goals on “zero hunger” and “good health and well‐being.”

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Phytohormones-induced senescence efficiently promotes the transport of cadmium from roots into shoots of plants: A novel strategy for strengthening of phytoremediation

Cited by 60 publications

References 79 publications

The Synergy of Arbuscular Mycorrhizal Fungi and Exogenous Abscisic Acid Benefits Robinia pseudoacacia L. Growth through Altering the Distribution of Zn and Endogenous Abscisic Acid

The Synergy of Arbuscular Mycorrhizal Fungi and Exogenous Abscisic Acid Benefits Robinia pseudoacacia L. Growth through Altering the Distribution of Zn and Endogenous Abscisic Acid

Hybridization With an Invasive Plant of Xanthium strumarium Improves the Tolerance of Its Native Congener X. sibiricum to Cadmium

Geochemical Interaction and Bioavailability of Zinc in Soil Under Long‐Term Integrated Nutrient Management in Pearl Millet–Wheat System

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