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Liu S, Xiao Y, Bai C, Liu H, Su X, Jin P, Xu H, Cao L, Yao L. The physiological and biochemical responses to dark pericarp disease induced by excess manganese in litchi. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 206:108269. [PMID: 38096732 DOI: 10.1016/j.plaphy.2023.108269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 02/15/2024]
Abstract
Dark pericarp disease (DPD), a physiological disorder induced by excess Manganese (Mn) in litchi, severely impacts the appearance and its economic value. To elucidate the underlying mechanisms of DPD, this study investigated the variations of phenolic compound, antioxidant defense system, subcellular structure, and transcriptome profiles in both normal fruit and dark pericarp fruit (DPF) at three developmental stages (green, turning, and maturity) of 'Guiwei' litchi. The results reveal that excess Mn in DPF pericarp resulted in a significant increase in reactive oxygen species, especially H2O2, and subsequent alterations in antioxidant enzyme activities. Notably, SOD (EC 1.15.1.1) activity at the green stage, along with POD (EC 1.11.1.7) and APX (EC 1.11.1.11) activities at the turning and the maturity stages, and GST (EC 2.5.1.18) activity during fruit development, were markedly higher in DPF. Cell injury was observed in pericarp, facilitating the formation of dark materials in DPF. Transcriptome profiling further reveals that genes involved in flavonoid and anthocyanin synthesis were up-regulated during the green stage but down-regulated during the turning and maturity stages. In contrast, PAL (EC 4.3.1.24), C4H (EC 1.14.14.91), 4CL (EC 6.2.1.12), CAD (EC 1.1.1.195), and particularly POD, were up-regulated, leading to reduced flavonoid and anthocyanin accumulation and increased lignin content in DPF pericarp. The above suggests that the antioxidant system and phenolic metabolism jointly resisted the oxidative stress induced by Mn stress. We speculate that phenols, terpenes, or their complexes might be the substrates of the dark substances in DPF pericarp, but more investigations are needed to identify them.
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Affiliation(s)
- Silin Liu
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Youping Xiao
- College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Cuihua Bai
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agricultural and Rural Pollution Abatement and Environmental Safety, Guangzhou, 510642, China
| | - Huilin Liu
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Xuexia Su
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Peng Jin
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Huiting Xu
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Laixin Cao
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Lixian Yao
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Key Laboratory of Agricultural and Rural Pollution Abatement and Environmental Safety, Guangzhou, 510642, China.
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Saeed T, Khan TA, Ahmad A, Yusuf M, Kappachery S, Fariduddin Q, Mudgal G, Gururani MA. Exploring the Effects of Selenium and Brassinosteroids on Photosynthesis and Protein Expression Patterns in Tomato Plants under Low Temperatures. PLANTS (BASEL, SWITZERLAND) 2023; 12:3351. [PMID: 37836091 PMCID: PMC10574566 DOI: 10.3390/plants12193351] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/15/2023] [Accepted: 09/19/2023] [Indexed: 10/15/2023]
Abstract
This study aimed to assess the effects of low-temperature stress on two tomato cultivars (S-22 and PKM-1) treated with 24-epibrassinolide (EBL) and selenium (Se) by determining the changes in the proteomics profiles, growth biomarkers, biochemical parameters, and physiological functions. The growth parameters, photosynthetic traits, and activity of nitrate reductase in the S-22 and PKM-1 plants were markedly reduced by exposure to low temperatures. However, the combined application of EBL and Se under different modes significantly enhanced the aforementioned parameters under stress and non-stress conditions. Exposure to low temperatures increased the activities of the antioxidant enzymes (catalase, peroxidase, and superoxide dismutase) and the proline content of leaves, which were further enhanced by treatment with Se and EBL in both varieties. This research sheds light on the potential for employing exogenous EBL and Se as crucial biochemical tactics to assist tomato plants in surviving low-temperature stress. Moreover, the differentially expressed proteins that were involved in plant metabolism following the combined application of EBL and Se under low-temperature stress were additionally identified. Functional analysis revealed that the Q54YH4 protein plays an active role against plant stressors. The conserved regions in the protein sequences were analyzed for assessing the reliability of plant responses against the external application of EBL and Se under low temperatures.
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Affiliation(s)
- Taiba Saeed
- Department of Biosciences, Integral University, Kursi Rd., Lucknow 226026, India
- Plant Biotechnology Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Tanveer Alam Khan
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates
| | - Aqeel Ahmad
- University of Chinese Academy of Sciences (UCAS), Beijing 100049, China
| | - Mohammad Yusuf
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates
| | - Sajeesh Kappachery
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates
| | - Qazi Fariduddin
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Gaurav Mudgal
- University Institute of Biotechnology, Chandigarh University, Mohali 140413, India
| | - Mayank Anand Gururani
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates
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Otunola BO, Aghoghovwia MP, Thwala M, Gómez-Arias A, Jordaan R, Hernandez JC, Ololade OO. Improving capacity for phytoremediation of Vetiver grass and Indian mustard in heavy metal (Al and Mn) contaminated water through the application of clay minerals. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:53577-53588. [PMID: 36859642 PMCID: PMC10119195 DOI: 10.1007/s11356-023-26083-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 02/19/2023] [Indexed: 06/18/2023]
Abstract
One of the consequences of mining is the release of heavy metals into the environment, especially water bodies. Phytoremediation of areas contaminated by heavy metals using Vetiver grass and Indian mustard is cost-effective and environmentally friendly. This study aimed at enhancing remediation of heavy metal contaminated water through the simultaneous hybrid application of clay minerals (attapulgite and bentonite) and Vetiver grass or Indian mustard. A 21-day greenhouse experiment was carried out to investigate the effectiveness of the clay minerals to improve heavy metal phytoremediation. The highest accumulation of aluminium (Al) by Vetiver grass was 371.8 mg/kg in the BT2.5VT treatment, while for Mn, the highest accumulation of 34.71 mg/kg was observed in the AT1VT treatment. However, Indian mustard showed no significant uptake of heavy metals, but suffered heavy metal toxicity despite the addition of clay minerals. From this study, it was evident that bentonite added at 2.5% (w/v) could improve the phytoremediation capacity of Vetiver grass for Al and Mn polluted water. The current laboratory-scale findings provided a basis for field trials earmarked for remediation in a post-mining coal environment in South Africa. This remediation approach can also be adopted in other places.
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Affiliation(s)
- Beatrice Omonike Otunola
- Centre for Environmental Management, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa.
| | - Makhosazana P Aghoghovwia
- Department of Soil, Crop and Climate Sciences, University of the Free State, Bloemfontein, South Africa
| | - Melusi Thwala
- Centre for Environmental Management, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa
- Science Advisory and Strategic Partnerships, Academy of Science of South Africa, Pretoria, South Africa
| | - Alba Gómez-Arias
- Centre for Mineral Biogeochemistry, University of the Free State, Bloemfontein, South Africa
| | - Rian Jordaan
- Department of Chemistry, University of the Free State, Bloemfontein, South Africa
| | - Julio Castillo Hernandez
- Department of Microbiology and Biochemistry, University of the Free State, Bloemfontein, South Africa
| | - Olusola Oluwayemisi Ololade
- Centre for Environmental Management, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa
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Foliarly Applied 24-Epibrassinolide Modulates the Electrical Conductivity of the Saturated Rhizospheric Soil Extracts of Soybean under Salinity Stress. PLANTS 2022; 11:plants11182330. [PMID: 36145731 PMCID: PMC9500870 DOI: 10.3390/plants11182330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/29/2022] [Accepted: 09/01/2022] [Indexed: 11/27/2022]
Abstract
The accumulation of salts within the rhizosphere is a common phenomenon in arid and semi-arid regions where irrigation water is high in salts. A previous study established the ameliorative effect of foliarly applied 24-epibrassinolide (BR) on soybean under salinity stress. As a follow-up to that study, this work evaluated the effects of BR on the electrical conductivity of saturated soil extracts (ECses) under soybean exposed to salt stress. Three salinity levels (3.24, 6.06 and 8.63 dS/m) in a factorial combination with six frequencies of BR application—control, seedling, flowering, podding, seedling + flowering and seedling + flowering + podding—were the treatments, and the rhizospheric ECse was monitored from 3 to 10 weeks after the commencement of irrigation with saline water (WAST). The principal component analysis revealed that samples in saline BR treatments clustered together based on the BR application frequencies. There was a significant increase in ECse with increases in salinity and WAST. The frequent application of BR significantly reduced ECse to 5.07 and 4.83 dS/m relative to the control with 6.91 dS/m, respectively, at week 10. At 8.63 dS/m, the application of BR (seedling + flowering + podding) reduced ECse by 31.96% compared with the control. The underlining mechanism is a subject for further investigation.
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Ahmad A, Wang R, Mubeen S, Akram W, Hu D, Yasin NA, Khan M, Wu T. Comparative transcriptomics reveals defense acquisition in Brassica rapa by synchronizing brassinosteroids metabolism with PR1 expression. EUROPEAN JOURNAL OF PLANT PATHOLOGY 2022; 162:869-884. [DOI: 10.1007/s10658-021-02443-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/09/2021] [Indexed: 06/16/2023]
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Song YJ, Li Y, Leng Y, Li SW. 24-epibrassinolide improves differential cadmium tolerance of mung bean roots, stems, and leaves via amending antioxidative systems similar to that of abscisic acid. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:52032-52045. [PMID: 33999324 DOI: 10.1007/s11356-021-14404-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 05/10/2021] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) pollution has attracted global concern. In the present study, the biochemical mechanisms underlying the amelioration of 24-epibrassinolide (eBL) and abscisic acid (ABA) on Cd tolerance of roots, stems, and leaves in mung bean seedlings were comparatively analyzed. Foliar application of eBL markedly ameliorated the growth of mung bean seedling exposed to 100 μM Cd. eBL alone had no significant effects on the activities of antioxidative enzymes and the contents of glutathione (GSH) and polyphenols in the three organs whereas significantly increased the root, stem, and leaf proline contents on average by 54.9%, 39.9%, and 94.4%, respectively, and leaf malondialdehyde (MDA) content on average by 69.0% compared with the controls. When the plants were exposed to Cd, eBL significantly reversed the Cd-increased root ascorbate peroxidase (APX) and superoxide dismutase (SOD) activities, root polyphenol, proline, and GSH levels, leaf chlorophyll contents, and MDA levels in the three organs. eBL significantly restored the Cd-decreased leaf catalase (CAT) activity and leaf polyphenol levels. These results indicated that eBL played roles in maintaining cellular redox homeostasis and evidently alleviated Cd-caused membrane lipid peroxidation via controlling the activity of antioxidative systems. eBL mediated the differential responses of cellular biochemical processes in the three organs to Cd exposure. Furthermore, a comparative analysis revealed that, under Cd stress, the effects of eBL on the biochemical processes were very similar to those of ABA, suggesting that ABA and eBL improve plant Cd tolerance via some common downstream pathways.
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Affiliation(s)
- Ya-Juan Song
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, P. R. China
| | - Yi Li
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, P. R. China
| | - Yan Leng
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, P. R. China
| | - Shi-Weng Li
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, P. R. China.
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Basit F, Liu J, An J, Chen M, He C, Zhu X, Li Z, Hu J, Guan Y. Brassinosteroids as a multidimensional regulator of plant physiological and molecular responses under various environmental stresses. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:44768-44779. [PMID: 34235688 DOI: 10.1007/s11356-021-15087-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/19/2021] [Indexed: 05/07/2023]
Abstract
Biotic and abiotic stresses, especially heavy metal toxicity, are becoming a big problem in agriculture, which pose serious threats to crop production. Plant hormones have recently been used to develop stress tolerance in a variety of plants. Brassinosteroids (BRs) are the sixth class of plant steroid hormones, with pleiotropic effects on plants. Exogenous application of BRs to boost plant tolerance mechanisms to various stresses has been a major research focus. Numerous studies have revealed the role of these steroidal hormones in the up-regulation of stress-related resistance genes, as well as their interactions with other metabolic pathways. BRs interact with other phytohormones such as auxin, cytokinin, ethylene, gibberellin, jasmonic acid, abscisic acid, salicylic acid, and polyamines to regulate a variety of physiological and developmental processes in plants. BRs regulate expressions of many BR-inducible genes by activating the brassinazole-resistant 1 (BZR1)/BRI1-EMS suppressor 1 (BES1) complex. Moreover, to improve plant development under a variety of stresses, BRs regulate antioxidant enzyme activity, chlorophyll concentration, photosynthetic capability, and glucose metabolism. This review will provide insights into the mechanistic role and actions of brassinosteroids in plants in response to various stresses.
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Affiliation(s)
- Farwa Basit
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jiaxin Liu
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jianyu An
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Min Chen
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Can He
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Xiaobo Zhu
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Zhan Li
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jin Hu
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Yajing Guan
- Institute of Crop Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China.
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Cheng L, Li M, Min W, Wang M, Chen R, Wang W. Optimal Brassinosteroid Levels Are Required for Soybean Growth and Mineral Nutrient Homeostasis. Int J Mol Sci 2021; 22:8400. [PMID: 34445112 PMCID: PMC8395106 DOI: 10.3390/ijms22168400] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 07/30/2021] [Accepted: 08/01/2021] [Indexed: 12/13/2022] Open
Abstract
Brassinosteroids (BRs) are steroid phytohormones that are known to regulate plant growth and nutrient uptake and distribution. However, how BRs regulate nutrient uptake and balance in legume species is not fully understood. Here, we show that optimal BR levels are required for soybean (Glycine max L.) seedling growth, as treatments with both 24-epicastasterone (24-epiCS) and the BR biosynthesis inhibitor propiconazole (PPZ) inhibit root growth, including primary root elongation and lateral root formation and elongation. Specifically, 24-epiCS and PPZ reduced the total phosphorus and potassium levels in the shoot and affected several minor nutrients, such as magnesium, iron, manganese, and molybdenum. A genome-wide transcriptome analysis identified 3774 and 4273 differentially expressed genes in the root tip after brassinolide and PPZ treatments, respectively. The gene ontology (GO) analysis suggested that genes related to "DNA-replication", "microtubule-based movement", and "plant-type cell wall organization" were highly responsive to the brassinolide and PPZ treatments. Furthermore, consistent with the effects on the nutrient concentrations, corresponding mineral transporters were found to be regulated by BR levels, including the GmPHT1s, GmKTs, GmVIT2, GmZIPs, and GmMOT1 genes. Our study demonstrates that optimal BR levels are important for growth and mineral nutrient homeostasis in soybean seedlings.
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Affiliation(s)
- Ling Cheng
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (L.C.); (M.W.); (R.C.)
| | - Man Li
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.L.); (W.M.)
| | - Wanling Min
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.L.); (W.M.)
| | - Mengke Wang
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (L.C.); (M.W.); (R.C.)
| | - Rongqing Chen
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (L.C.); (M.W.); (R.C.)
| | - Wenfei Wang
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (L.C.); (M.W.); (R.C.)
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Xie C, Pu S, Xiong X, Chen S, Peng L, Fu J, Sun L, Guo B, Jiang M, Li X. Melatonin-assisted phytoremediation of Pb-contaminated soil using bermudagrass. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:44374-44388. [PMID: 33846924 DOI: 10.1007/s11356-021-13790-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
Exogenous application of melatonin to plants is a promising approach for assisted phytoremediation of soil lead (Pb). In this study, we investigated the effects of foliar applications of melatonin to mature bermudagrass (Cynodon dactylon (L.) Pers.), a fast-growing perennial with potential as a non-hyperaccumulator plant for Pb phytoremediation. Following exposure to Pb (3000 mg kg-1) for 30 days, decreases in biomass and chlorophyll production, degradation of thylakoid membranes, reduced photosynthesis and PSII (reaction center of photosystem II) efficiency, and elevated oxidative stress were found. Foliar applications of melatonin to Pb-stressed bermudagrass mitigated these negative effects, restoring photosynthetic pigments and chloroplast ultrastructure, subsequently improving photosynthesis and photochemistry efficiency of PSII. Exogenous melatonin also eliminated the excessive accumulations of reactive oxygen species (ROS) and methylglyoxal (MG) which associated with cellular redox homeostasis by improving ascorbic acid (AsA) and reduced glutathione (GSH) contents, redox status of GSH/GSSG (oxidative glutathione), and key enzymes activities in both AsA-GSH and glyoxalase systems. Ultimately, treating bermudagrass plants with exogenous melatonin elevated biomass production and disproportionally greater Pb translocation to roots and senescent leaves. This collectively resulted in 21% greater recovery of Pb compared to Pb-stressed bermudagrass lacking melatonin application. Overall, results from this study demonstrated the beneficial roles of melatonin for improving the effectiveness of bermudagrass as a non-hyperaccumulator plant for soil Pb phytoremediation.
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Affiliation(s)
- Chengcheng Xie
- College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, 611130, Sichuan, People's Republic of China
| | - Siyi Pu
- College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, 611130, Sichuan, People's Republic of China
| | - Xi Xiong
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA
| | - Shuyu Chen
- College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, 611130, Sichuan, People's Republic of China
| | - Lingli Peng
- Department of Leisure and Tourism, Chengdu Agricultural College, Wenjiang, Sichuan, 611130, People's Republic of China
| | - Jingyi Fu
- College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, 611130, Sichuan, People's Republic of China
| | - Lingxia Sun
- College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, 611130, Sichuan, People's Republic of China
| | - Baimeng Guo
- College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, 611130, Sichuan, People's Republic of China
| | - Mingyan Jiang
- College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, 611130, Sichuan, People's Republic of China
| | - Xi Li
- College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, 611130, Sichuan, People's Republic of China.
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Kour J, Kohli SK, Khanna K, Bakshi P, Sharma P, Singh AD, Ibrahim M, Devi K, Sharma N, Ohri P, Skalicky M, Brestic M, Bhardwaj R, Landi M, Sharma A. Brassinosteroid Signaling, Crosstalk and, Physiological Functions in Plants Under Heavy Metal Stress. FRONTIERS IN PLANT SCIENCE 2021; 12:608061. [PMID: 33841453 PMCID: PMC8024700 DOI: 10.3389/fpls.2021.608061] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 01/27/2021] [Indexed: 05/05/2023]
Abstract
Brassinosteroids (BRs) are group of plant steroidal hormones that modulate developmental processes and also have pivotal role in stress management. Biosynthesis of BRs takes place through established early C-6 and late C-6 oxidation pathways and the C-22 hydroxylation pathway triggered by activation of the DWF4 gene that acts on multiple intermediates. BRs are recognized at the cell surface by the receptor kinases, BRI1 and BAK1, which relay signals to the nucleus through a phosphorylation cascade involving phosphorylation of BSU1 protein and proteasomal degradation of BIN2 proteins. Inactivation of BIN2 allows BES1/BZR1 to enter the nucleus and regulate the expression of target genes. In the whole cascade of signal recognition, transduction and regulation of target genes, BRs crosstalk with other phytohormones that play significant roles. In the current era, plants are continuously exposed to abiotic stresses and heavy metal stress is one of the major stresses. The present study reveals the mechanism of these events from biosynthesis, transport and crosstalk through receptor kinases and transcriptional networks under heavy metal stress.
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Affiliation(s)
- Jaspreet Kour
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Sukhmeen Kaur Kohli
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Kanika Khanna
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Palak Bakshi
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Pooja Sharma
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Arun Dev Singh
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Mohd Ibrahim
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Kamini Devi
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Neerja Sharma
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Puja Ohri
- Department of Zoology, Guru Nanak Dev University, Amritsar, India
| | - Milan Skalicky
- Department of Botany and Plant Physiology, Czech University of Life Sciences Prague, Prague, Czechia
| | - Marian Brestic
- Department of Botany and Plant Physiology, Czech University of Life Sciences Prague, Prague, Czechia
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovakia
| | - Renu Bhardwaj
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India
| | - Marco Landi
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Anket Sharma
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China
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11
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Salinity Effects on Morpho-Physiological and Yield Traits of Soybean ( Glycine max L.) as Mediated by Foliar Spray with Brassinolide. PLANTS 2021; 10:plants10030541. [PMID: 33805623 PMCID: PMC8000651 DOI: 10.3390/plants10030541] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 02/25/2021] [Accepted: 03/09/2021] [Indexed: 11/28/2022]
Abstract
Salinity episodes that are common in arid regions, characterized by dryland, are adversely affecting crop production worldwide. This study evaluated the effectiveness of brassinolide (BL) in ameliorating salinity stress imposed on soybean at four levels (control (1.10), 32.40, 60.60 and 86.30 mM/L NaCl) in factorial combination with six BL application frequency (control (BL0), application at seedling (BL1), flowering (BL2), podding (BL3), seedling + flowering (BL4) and seedling + flowering + podding (BL5)) stages. Plant growth attributes, seed yield, and N, P, K, Ca and Mg partitioning to leaves, stems and roots, as well as protein and seed-N concentrations, were significantly (p ≤ 0.05) reduced by salinity stress. These trends were ascribed to considerable impairments in the photosynthetic pigments, photosynthetically active radiation, leaf stomatal conductance and relative water content in the leaves of seedlings under stress. The activity of peroxidase and superoxidase significantly (p ≤ 0.05) increased with salinity. Foliar spray with BL significantly (p ≤ 0.05) improved the photosynthetic attributes, as well as nutrient partitioning, under stress, and alleviated ion toxicity by maintaining a favourable K+/Na+ ratio and decreasing oxidative damage. Foliar spray with brassinolide could sustain soybean growth and seed yield at salt concentrations up to 60.60 mM/L NaCl.
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Tadaiesky LBA, da Silva BRS, Batista BL, Lobato AKDS. Brassinosteroids trigger tolerance to iron toxicity in rice. PHYSIOLOGIA PLANTARUM 2021; 171:371-387. [PMID: 33090462 DOI: 10.1111/ppl.13230] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/05/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
Iron (Fe) toxicity is one of the most frequent abiotic stresses in rice, as it affects from 15% to 30% of the total production. Brassinosteroids (BRs), including 24-epibrassinolide (EBR), regulate ion homeostasis and improve the antioxidant system. The aim of this research was to determine whether EBR can contribute to the tolerance of rice plants exposed to Fe toxicity and to evaluate the possible effect on anatomical characteristics, nutrient concentrations, the antioxidant system, and gas exchange. The experiment was randomized with four treatments, two with different concentrations of Fe (250 and 6250 μM, control and toxicity, respectively) and these were either supplied with EBR or not (0 and 10 nM EBR, described as -EBR and +EBR, respectively). Treating plants grown under Fe toxic conditions with EBR caused an 70% increase in root aerenchyma area, compared to plants without steroid treatment. Our results revealed that EBR treatment could mitigate the deleterious effects of Fe toxicity in rice plants, by modulating the aerenchyma area, which contributes to the formation of an oxidative barrier and reduce the Fe mobilization at the root surface. Plants that were exposed to Fe toxic concentrations and treated with EBR showed (1) an increase in the enzyme activities of superoxide dismutase, catalase, ascorbate peroxidase and peroxidase, (2) mitigation of oxidative damage and (3) increased scavenging of reactive oxygen species. Finally, EBR alleviated the negative impacts induced by excess Fe on the net photosynthetic rate and the instantaneous carboxylation efficiency. These benefits were directly related to higher electron transport and stomatal density and indirectly linked to the protection mechanism exercised by the antioxidant enzymes on photosynthetic machinery. We conclude that EBR is able to confer tolerance to Fe toxicity in rice plants.
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Affiliation(s)
- Lorene B A Tadaiesky
- Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Paragominas, Brazil
| | - Breno R S da Silva
- Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Paragominas, Brazil
| | - Bruno Lemos Batista
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Paulo, Brazil
| | - Allan K da S Lobato
- Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Paragominas, Brazil
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Shah AA, Ahmed S, Abbas M, Ahmad Yasin N. Seed priming with 3-epibrassinolide alleviates cadmium stress in Cucumis sativus through modulation of antioxidative system and gene expression. SCIENTIA HORTICULTURAE 2020; 265:109203. [DOI: 10.1016/j.scienta.2020.109203] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
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14
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Majumder B, Das S, Pal B, Biswas AK. Evaluation of arsenic induced toxicity based on arsenic accumulation, translocation and its implications on physio-chemical changes and genomic instability in indica rice (Oryza sativa L.) cultivars. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:13-34. [PMID: 31735977 DOI: 10.1007/s10646-019-02135-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/02/2019] [Indexed: 06/10/2023]
Abstract
Arsenic (As) accumulation in rice is a principal route of As exposure for rice based population. We have tested physiochemical and molecular parameters together to identify low As accumulating rice cultivars with normal growth and vigor. The present study examined potential toxicity caused by arsenate (AsV) among four rice cultivars tested that varied with respect to accumulation of total arsenic, arsenite (AsIII) and their differential translocation rate which had deleterious impact on growth and metabolism. Intracellular homeostasis of rice cultivars viz., TN-1, IR-64, IR-20 and Tulaipanji was hampered by 21 days long As(V) treatment due to generation of reactive oxygen species (ROS) and inadequate activity of catalase (CAT; EC 1.11.1.6). Upregulation of oxidative stress markers viz., H2O2, proline and MDA along with alteration in enzymatic antioxidants profile were conspicuously pronounced in cv. Tulaipanji while cv. TN-1 was least affected under As(V) challenged environment. In addition to that genomic template stability and band sharing indices were qualitatively measured by DNA profiling of all tested cultivars treated with 25 μM, 50 μM, and 75 μM As(V). In rice cv. Tulaipanji genetic polymorphism was significantly detected with the application of random amplified polymorphic DNA (RAPD) tool and characterized as susceptible cultivar of As compared to cvs. TN-1, IR-64 and IR-20 that is in correlation with data obtained from cluster analysis. Hence, identified As tolerant cultivars viz., TN-1, IR64 and IR-20 especially TN-1 could be used in As contaminated agricultural field after appropriate field trial. This study could help to gather information regarding cultivar-specific tolerance strategy to avoid pollutant induced toxicity.
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Affiliation(s)
- Barsha Majumder
- Plant Physiology & Biochemistry Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India
- Biological Anthropology Unit, Indian Statistical Institute, 203, Barrackpore Trunk Road, Kolkata, 700108, India
| | - Susmita Das
- Plant Physiology & Biochemistry Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India
| | - Baidyanath Pal
- Biological Anthropology Unit, Indian Statistical Institute, 203, Barrackpore Trunk Road, Kolkata, 700108, India
| | - Asok K Biswas
- Plant Physiology & Biochemistry Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India.
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Shah AA, Ahmed S, Yasin NA. 24-epibrassinolide triggers cadmium stress mitigation in Cucumis sativus through intonation of antioxidant system. SOUTH AFRICAN JOURNAL OF BOTANY 2019; 127:349-360. [DOI: 10.1016/j.sajb.2019.11.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
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16
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Hussain A, Nazir F, Fariduddin Q. Polyamines (spermidine and putrescine) mitigate the adverse effects of manganese induced toxicity through improved antioxidant system and photosynthetic attributes in Brassica juncea. CHEMOSPHERE 2019; 236:124830. [PMID: 31549671 DOI: 10.1016/j.chemosphere.2019.124830] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 09/05/2019] [Accepted: 09/09/2019] [Indexed: 05/09/2023]
Abstract
Polyamines (PAs) are recognized as plant growth regulators that are involved in the stress management in various crops. In the current study, mitigative roles of spermidine (Spd) and putrescine (Put) were assessed in manganese (Mn) stressed Brassica juncea plants. Spd or Put (1.0 mM) were applied to the foliage of Brassica juncea at 35 days after sowing (DAS) grown in the presence of Mn (30 or 150 mg kg-1 soil). The higher level of Mn (150 mg kg-1) diminished photosynthetic attributes and growth, enhanced the production of reactive oxygen species (ROS) like hydrogen peroxide (H2O2) and superoxide anion ( [Formula: see text] ) content, affected stomatal movement and increased the Mn concentration in roots and shoots of the plant at 45 DAS, whereas it enhanced the activities of various antioxidant enzymes and proline content in the foliage of Brassica juncea plants. On the other hand, treatment of PAs (Spd or Put) to Mn stressed as well as non-stressed plants resulted in a remarkable improvement in the stomatal behaviour, photosynthetic attributes, growth and biochemical traits, decreased the production of ROS (H2O2 and [Formula: see text] ) and concentration of Mn in different parts of plant. It is concluded that out of the two polyamines (Spd or Put), Spd proved more efficient and enhanced growth, photosynthesis, and metabolic state of the plants which bestowed tolerance and helped the plants to cope efficiently under Mn stress.
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Affiliation(s)
- Anjuman Hussain
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202 002, India
| | - Faroza Nazir
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202 002, India
| | - Qazi Fariduddin
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202 002, India.
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Wu C, Li F, Xu H, Zeng W, Yu R, Wu X, Shen L, Liu Y, Li J. The potential role of brassinosteroids (BRs) in alleviating antimony (Sb) stress in Arabidopsis thaliana. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 141:51-59. [PMID: 31128563 DOI: 10.1016/j.plaphy.2019.05.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 05/09/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
Brassinosteroids (BRs) play a crucial role in improving plant resistance to various environmental stresses. In this study, we aimed to explore the potential role of BRs in protecting plants from antimony (Sb) toxicity. In the in vitro agar-plate culture experiments, the level changes of BR in wide-type plants and BR biosynthesis mutant dwrf4-1 significantly affected the corresponding response of Arabidopsis to Sb stress. Increasing the BR content significantly enhanced Sb-induced root growth inhibition and lowering the BR level appeared to reduce the plant sensitivity to Sb stress. Foliar application of eBL, however, significantly decreased the Sb accumulation and peroxidation of membrane lipids, increased the contents of chlorophyll and proline, and further boosted and strengthened the antioxidant enzymes activities. These experiments demonstrated that BRs played an important role in regulating heavy metal stress responses in plants and exogenous foliar spray of eBL was an important method for alleviating toxicity of Sb.
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Affiliation(s)
- Chenchen Wu
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China
| | - Fang Li
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China
| | - Hui Xu
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China
| | - Weimin Zeng
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China; CSIRO Mineral Resources, Clayton South, Vic 3169, Australia
| | - Runlan Yu
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China
| | - Xueling Wu
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China
| | - Yuandong Liu
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China
| | - Jiaokun Li
- School of Minerals Processing and Bioengineering, Central South University (CSU), Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Central South University (CSU), Changsha, 410083, China.
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Hussain A, Nazir F, Fariduddin Q. 24-epibrassinolide and spermidine alleviate Mn stress via the modulation of root morphology, stomatal behavior, photosynthetic attributes and antioxidant defense in Brassica juncea. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2019; 25:905-919. [PMID: 31404216 PMCID: PMC6656853 DOI: 10.1007/s12298-019-00672-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/01/2019] [Accepted: 05/01/2019] [Indexed: 05/19/2023]
Abstract
Brassinosteroids and polyamines are generally used to surpass different abiotic stresses like heavy metal toxicity in plants. The current study was conducted with an aim that 24-epibrassinolide (EBL) and/or spermidine (Spd) could modify root morphology, movement of stomata, cell viability, photosynthetic effectiveness, carbonic anhydrase and antioxidant enzyme activities in Brassica juncea under manganese (Mn) stress (30 or 150 mg kg-1 soil). EBL (10-8 M) and/or Spd, (1.0 mM) were applied to the foliage of B. juncea plants at 35 days after sowing (DAS), grown in the presence of Mn (30 or 150 mg kg-1 soil). High Mn concentration (150 mg kg-1 soil) altered root morphology, affected stomatal movement, reduced the viability of cells and photosynthetic effectiveness and increased the production of reactive oxygen species (O2 ·- and H2O2) in the leaves and antioxidant defense system of B. juncea at 45 DAS. Furthermore, exogenous treatment of EBL and Spd under stress and stress- free conditions improved the aforesaid traits while decreased the O2 ·- and H2O2 production. Therefore, EBL and Spd could be applied to the foliage of B. juncea plants for the better growth under metal stress.
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Affiliation(s)
- Anjuman Hussain
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002 India
| | - Faroza Nazir
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002 India
| | - Qazi Fariduddin
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002 India
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Kaur R, Yadav P, Sharma A, Kumar Thukral A, Kumar V, Kaur Kohli S, Bhardwaj R. Castasterone and citric acid treatment restores photosynthetic attributes in Brassica juncea L. under Cd(II) toxicity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 145:466-475. [PMID: 28780445 DOI: 10.1016/j.ecoenv.2017.07.067] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 07/15/2017] [Accepted: 07/21/2017] [Indexed: 05/03/2023]
Abstract
Cadmium(II) toxicity is a serious environmental issue warranting effective measures for its mitigation. In the present study, ameliorative effects of a bioactive brassinosteroid, castasterone (CS) and low molecular weight organic acid, citric acid (CA) against the Cd(II) toxicity to Brassica juncea L. were evaluated. Seeds of B. juncea treated with CS (0, 0.01, 1 and 100nM) were sown in cadmium spiked soils (0 and 0.6mmolkg-1 soil). CA (0.6mmolkg-1soil) was added to soil one week after sowing seeds. Plants were harvested 30 days after sowing. Phytotoxicity induced by Cd(II) was evident from stunted growth of the plants, malondialdehyde accumulation, reduction in chlorophyll and carotenoid contents, and leaf gas exchange parameters. Cd(II) toxicity was effectively alleviated by seed soaking with CS (100nM) and/ or soil amendment with CA (0.6mMkg-1 soil). Relative gene expression of genes encoding for some of the key enzymes of pigment metabolism were also analysed. Expression of chlorophyllase (CHLASE) was reduced, while that of phytoene synthase (PSY), and chalcone synthase (CHS) genes were enhanced with CS and/or CA treatments with respect to plants treated with Cd(II) only. Cd also affected the activities of antioxidative enzymes. Plants responded to Cd(II) by accumulation of total sugars. CS (100nM) and CA treatments further enhanced the activities of these parameters and induced the contents of secondary plant pigments (flavonoids and anthocyanins) and proline. The results imply that seed treatment with CS and soil application with CA can effectively alleviate Cd(II) induced toxicity in B. juncea by strengthening its antioxidative defence system and enhancing compatible solute accumulation.
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Affiliation(s)
- Ravdeep Kaur
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Poonam Yadav
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Anket Sharma
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India; Department of Botany, DAV University, Sarmastpur, Jalandhar 144012, Punjab, India
| | - Ashwani Kumar Thukral
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Vinod Kumar
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India; Department of Botany, DAV University, Sarmastpur, Jalandhar 144012, Punjab, India
| | - Sukhmeen Kaur Kohli
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Renu Bhardwaj
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
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Modifications of morphological and anatomical characteristics of plants by application of brassinosteroids under various abiotic stress conditions - A review. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.plgene.2017.06.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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21
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Nawaz F, Naeem M, Zulfiqar B, Akram A, Ashraf MY, Raheel M, Shabbir RN, Hussain RA, Anwar I, Aurangzaib M. Understanding brassinosteroid-regulated mechanisms to improve stress tolerance in plants: a critical review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:15959-15975. [PMID: 28540554 DOI: 10.1007/s11356-017-9163-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 05/01/2017] [Indexed: 05/25/2023]
Abstract
Brassinosteroids (BRs) are steroidal plant hormones involved in regulation of physiological and molecular processes to ameliorate various biotic and abiotic stresses. Exogenous application of BRs to improve stress tolerance in plants has recently become a high research priority. Several studies have revealed the involvement of these steroidal hormones in upregulation of stress-related defense genes and their cross talk with other metabolic pathways. This is likely to stimulate research on many unanswered questions regarding their role in enhancing the ability of plants to tolerate adverse environmental conditions. Thus, this review appraises new insights on mechanisms mediating BR-regulated changes in plants, focused mainly on their involvement in regulation of physiological and molecular mechanisms under stress conditions. Herein, examples of BR-stimulated modulation of antioxidant defense system and upregulation of transcription factors in plants exposed to various biotic (bacterial, viral, and fungal attack) and abiotic stresses (drought, salinity, heat, low temperature, and heavy metal stress) are discussed. Based on these insights, future research in the current direction can be helpful to increase our understanding of BR-mediated complex and interrelated processes under stress conditions.
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Affiliation(s)
- Fahim Nawaz
- Department of Agronomy, MNS University of Agriculture, Multan, Pakistan.
| | - Muhammad Naeem
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Bilal Zulfiqar
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Asim Akram
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Muhammad Yasin Ashraf
- Crop Stress Management Group, Nuclear Institute for Agriculture and Biology, Faisalabad, Pakistan
| | - Muhammad Raheel
- Department of Plant Pathology, UCA & ES, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Rana Nauman Shabbir
- Department of Agronomy, Agriculture College, Bahauddin Zakariya University, Multan, Pakistan
| | - Rai Altaf Hussain
- Department of Agronomy, PMAS Arid Agriculture University, Rawalpindi, Pakistan
| | - Irfan Anwar
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
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Chandrakar V, Yadu B, Meena RK, Dubey A, Keshavkant S. Arsenic-induced genotoxic responses and their amelioration by diphenylene iodonium, 24-epibrassinolide and proline in Glycine max L. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 112:74-86. [PMID: 28049059 DOI: 10.1016/j.plaphy.2016.12.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 12/24/2016] [Accepted: 12/24/2016] [Indexed: 06/06/2023]
Abstract
Presence of the toxic metalloid, "arsenic (As)" is ubiquitous in the environment especially in the soil and water. Its excess availability in the soil retards growth and metabolism of plants via (a) slowing down the cell division/elongation, (b) overproduction of reactive oxygen species (ROS), (c) modulation of antioxidant enzymes, and (d) alteration of DNA profile/genomic template stability (GTS). In the current study, diphenylene iodonium (DPI), 24-epibrassinolide (EBL) and proline (Pro) were used to analyze their roles in eliminating the adverse effects of As. Glycine max L. (variety JS 335) seeds were subjected to As (75 μM, Sodium arsenite was used as source of As), and in combination with DPI (10 μM), EBL (0.5 μM) or Pro (10 mM), for five consecutive days, and effects of these treatment combinations were analyzed on germination percentage, biomass, membrane stability, GTS and expressions of defensive genes. In addition, the levels of As, ROS, malondialdehyde, DNA content, oxidation, fragmentation, polymorphism, DNase activity, endogenous Pro and pyrroline-5-carboxylate synthetase activity were evaluated. The results indicated that the treatments of DPI, EBL or Pro are capable to alleviate detrimental effects of As, gauged from above variables, but with different magnitudes. Apropos As-stress mitigation, Pro was found to be the most effective under the confines of the study protocol. This study certainly provides new ideas for intensifying studies to unravel elusive central mechanism of amelioration involving use of DPI, EBL or Pro in plants with confirmed As-toxicity.
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Affiliation(s)
- Vibhuti Chandrakar
- School of Studies in Biotechnology, Pt. Ravishankar Shukla University, Raipur 492 010, India
| | - Bhumika Yadu
- School of Studies in Biotechnology, Pt. Ravishankar Shukla University, Raipur 492 010, India
| | | | - Amit Dubey
- Central Laboratory Facility, Chhattisgarh Council of Science and Technology, Raipur 492 010, India
| | - S Keshavkant
- School of Studies in Biotechnology, Pt. Ravishankar Shukla University, Raipur 492 010, India.
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López-Gómez M, Hidalgo-Castellanos J, Lluch C, Herrera-Cervera JA. 24-Epibrassinolide ameliorates salt stress effects in the symbiosis Medicago truncatula-Sinorhizobium meliloti and regulates the nodulation in cross-talk with polyamines. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2016; 108:212-221. [PMID: 27448795 DOI: 10.1016/j.plaphy.2016.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 07/14/2016] [Accepted: 07/18/2016] [Indexed: 05/01/2023]
Abstract
Brassinosteroids (BRs) are steroid plant hormones that have been shown to be involved in the response to salt stress in cross-talk with other plant growth regulators such as polyamines (PAs). In addition, BRs are involved in the regulation of the nodulation in the rhizobium-legume symbiosis through the alteration of the PAs content in leaves. In this work, we have studied the effect of exogenous 24-epibrassinolide (EBL) in the response to salinity of nitrogen fixation in the symbiosis Medicago truncatula-Sinorhizobium meliloti. Foliar spraying of EBL restored the growth of plants subjected to salt stress and provoked an increment of the nitrogenase activity. In general, PAs levels in leaves and nodules decreased by the salt and EBL treatments, however, the co-treatment with NaCl and EBL augmented the foliar spermine (Spm) concentration. This increment of the Spm levels was followed by a reduction of the membrane oxidative damage and a diminution of the proline accumulation. The effect of BRs on the symbiotic interaction was evaluated by the addition of 0.01, 0.1 and 0.5 μM EBL to the growing solution, which provoked a reduction of the nodule number and an increment of the PAs levels in shoot. In conclusion, foliar treatment with EBL had a protective effect against salt stress in the M. truncatula-S. meliloti symbiosis mediated by an increment of the Spm levels. Treatment of roots with EBL incremented PAs levels in shoot and reduced the nodule number which suggests a cross-talk between PAs and BRs in the nodule suppression and the protection against salt stress.
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Affiliation(s)
- Miguel López-Gómez
- Departamento de Fisiología Vegetal, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071, Granada, Spain.
| | - Javier Hidalgo-Castellanos
- Departamento de Fisiología Vegetal, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071, Granada, Spain
| | - Carmen Lluch
- Departamento de Fisiología Vegetal, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071, Granada, Spain
| | - José A Herrera-Cervera
- Departamento de Fisiología Vegetal, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071, Granada, Spain
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