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Shen X, Sun M, Nie B, Li X. Physiological adaptation of Cyperus esculentus L. seedlings to varying concentrations of saline-alkaline stress: Insights from photosynthetic performance. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 214:108911. [PMID: 38976943 DOI: 10.1016/j.plaphy.2024.108911] [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: 04/23/2024] [Revised: 06/30/2024] [Accepted: 07/03/2024] [Indexed: 07/10/2024]
Abstract
Soil salinization effects plant photosynthesis in a number of global ecosystems. In this study, photosynthetic and physiological parameters were used to elucidate the impacts of saline-alkaline stress on Cyperus esculentus L. (C. esculentus) seedling photosynthesis. The results demonstrate that salt stress, alkali stress and mixed salt and alkali stress treatments all have similar bell-shaped influences on photosynthesis. At low concentrations (0-100 mmol L-1), saline-alkaline stress promoted net photosynthetic rate, transpiration rate and water use efficiency in C. esculentus. However, as the treatments increased in intensity (100-200 mmol L-1), plant photosynthetic parameters began to decline. We interpreted this as the capacity of C. esculentus to improve osmoregulatory capacity in low saline-alkaline stress treatments by accumulating photosynthetic pigment, proline and malondialdehyde to counterbalance the induced stress - an adaptive mechanism that failed once concentrations reached a critical threshold (100 mmol L-1). Stomatal conductance, maximum photosynthetic rate and actual photosynthetic rate all decreased with increasing concentration of the stress treatments, and intercellular carbon dioxide showed a decreasing and then increasing trend. These results indicated that when the saline-alkaline stress concentrations were low, C. esculentus seedlings showed obvious adaptive ability, but when the concentration increased further, the physiological processes of C. esculentus seedlings were significantly affected, with an obvious decrease in photosynthetic efficiency. This study provides a new understanding of the photosynthetic adaptation strategies of C. esculentus seedlings to varying concentrations of saline-alkaline stress.
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Affiliation(s)
- Xin Shen
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 83001, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele, 848300, Xinjiang, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mengxin Sun
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 83001, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bixia Nie
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 83001, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele, 848300, Xinjiang, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiangyi Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 83001, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele, 848300, Xinjiang, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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Unnikrishnan DK, Sreeharsha RV, Mudalkar S, Reddy AR. Flowering onset time is regulated by microRNA-mediated trehalose-6-phosphate signaling in Cajanus cajan L . under elevated CO 2. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2024; 30:483-496. [PMID: 38633268 PMCID: PMC11018574 DOI: 10.1007/s12298-024-01434-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 02/24/2024] [Accepted: 03/05/2024] [Indexed: 04/19/2024]
Abstract
CO2 levels are known to have an impact on plant development and physiology. In the current study, we have investigated the effect of elevated CO2 on flowering and its regulation through miRNA mediated sugar signaling. We also unraveled small RNA transcriptome of pigeonpea under ambient and elevated CO2 conditions and predicted the targets for crucial miRNAs through computational methods. The results have shown that the delayed flowering in pigeonpea under elevated CO2 was due to an imbalance in C:N stoichiometry and differential expression pattern of aging pathway genes, including SQUAMOSA PROMOTER BINDING PROTEIN-LIKE. Furthermore, qRT PCR analysis has revealed the role of miR156 and miR172 in mediating trehalose-6-phosphate dependent flowering regulation. The current study is crucial in understanding the responses of flowering patterns in a legume crop to elevated CO2 which showed a significant impact on its final yields. Also, these findings are crucial in devising effective crop improvement strategies for developing climate resilient crops, including pigeonpea. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-024-01434-9.
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Affiliation(s)
| | | | - Shalini Mudalkar
- Forest College and Research Institute, Hyderabad, Mulugu, Telangana 502279 India
| | - Attipalli R. Reddy
- Department of Plant Sciences, University of Hyderabad, Hyderabad, 500049 India
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Yu X, Zhao J, Song M, Li R, Yang Y, Ye X, Chen X. Analysis of the mechanism of exogenous indole-3-acetic acid on the enrichment of d-glucose in Chlorococcum humicola cultured by sludge extracts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 902:166124. [PMID: 37562626 DOI: 10.1016/j.scitotenv.2023.166124] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/04/2023] [Accepted: 08/06/2023] [Indexed: 08/12/2023]
Abstract
Addressing problems of high organic toxicity in the wastewater treatment process, microalgae have been used to reduce the toxicity in sludge and to synthesize non-toxic and recoverable biomass of resources. Phytohormone is a core regulator of plant growth and current research has generally focused on their promotion of cell division and cell expansion. Effects of phytohormone on the enrichment mechanism of microalgae directional polysaccharides accumulation remain poorly elucidated. This study was carried out to investigate the effects of exogenous indole-3-acetic acid (IAA) on growth characteristics, biomass accumulation, and photosynthesis capacity of Chlorococcum humicola cultured in sludge extract and further find the d-glucose enrichment mechanism of it through proteomic. The results indicated that the optimal culture conditions were the 75 % sludge extract and 25 % selenite enrichment (SE) medium with 5 × 10-6 mol/L indole-3-acetic acid. Polysaccharides increased significantly from day 20 and accumulated to (326.59 ± 13.06) mg/L on day 30, in which the d-glucose proportion increased to 61.53 %. Most notably, proteomic tests were performed and found that the photosynthesis-related proteins including the differential proteins of photosystem electron transport, ATP and NADPH catalytic synthesis were significantly up-regulated. At the end of the path, three pathways of d-glucose enrichment with α-d-Glucose-1P as a precursor were summarized through indole-3-acetic acid activation on amylase, endoglucanase and Beta-glucosidase, etc. These results provide insights to explore the directed enrichment of biomass in Chlorococcum humicola by indole-3-acetic acid.
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Affiliation(s)
- Xiao Yu
- National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai 200237, China
| | - Jiamin Zhao
- National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai 200237, China
| | - Meijing Song
- National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai 200237, China
| | - Renjie Li
- National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai 200237, China
| | - Yingying Yang
- National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaoyun Ye
- National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai 200237, China
| | - Xiurong Chen
- National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
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Alsherif EA, Hajjar D, Aldilami M, AbdElgawad H. Physiological and biochemical responses of wheat to synergistic effects of selenium nanoparticles and elevated CO 2 conditions. FRONTIERS IN PLANT SCIENCE 2023; 14:1183185. [PMID: 37521939 PMCID: PMC10373590 DOI: 10.3389/fpls.2023.1183185] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 06/07/2023] [Indexed: 08/01/2023]
Abstract
Elevating CO2 (eCO2) levels will change behavior and the effect of soil fertilizers and nutrients. Selenium NPs (SeNPs) have arisen as an alternative to conventional Se fertilizers to enrich crops. However, it remains unclear whether eCO2 will change the biological effects of soil SeNPs on plant growth and metabolism. The current study aimed to shed new light on the interactive impacts of eCO2 and SeNPs on wheat plants. Accordingly, the attempts were to reveal whether the application of SeNPs can modulate the eCO2 effects on wheat (Triticum aestivum L.) physiological and biochemical traits. With this goal, a pot experiment was carried out where the seeds were primed with SeNPs and plants were grown under two levels of CO2 concentrations (ambient CO2 (aCO2, 410 μmol CO2 mol-1; and eCO2 (710 μmol CO2 mol-1)) during six weeks after sowing. Although SeNPs+eCO2 treatment resulted in the highest accumulation of photosynthetic pigment content in leaves (+49-118% higher than control), strong evidence of the positive impacts on Rubisco activity (~+23%), and stomatal conductance (~+37%) was observed only under eCO2, which resulted in an improvement in photosynthesis capacity (+42%). When photosynthesis parameters were stimulated with eCO2, a significant improvement in dry matter production was detected, in particular under SeNPs+eCO2 which was 1.8 times higher than control under aCO2. The highest content of antioxidant enzymes, molecules, and metabolites was also recorded in SeNPs+eCO2, which might be associated with the nearly 50% increase in sodium content in shoots at the same treatment. Taken together, this is the first research documenting the effective synergistic impacts of eCO2 and SeNPs on the mentioned metabolites, antioxidants, and some photosynthetic parameters, an advantageous consequence that was not recorded in the individual application of these treatments, at least not as broadly as with the combined treatment.
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Affiliation(s)
- Emad A. Alsherif
- Biology Department, College of Science and Arts at Khulis, University of Jeddah, Jeddah, Saudi Arabia
| | - Dina Hajjar
- Department of Biochemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Mohammad Aldilami
- Biology Department, College of Science and Arts at Khulis, University of Jeddah, Jeddah, Saudi Arabia
| | - Hamada AbdElgawad
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, Antwerp, Belgium
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An YQ, Qin ZT, Li DD, Zhao RQ, Bi BS, Wang DW, Ma DJ, Xi Z. The combined formulation of brassinolide and pyraclostrobin increases biomass and seed yield by improving photosynthetic capacity in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2023; 14:1138563. [PMID: 37063198 PMCID: PMC10090558 DOI: 10.3389/fpls.2023.1138563] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 03/13/2023] [Indexed: 06/19/2023]
Abstract
In the context of global food crisis, applying the phytohormone-brassinosteroids (BRs) in combination with the fungicide-pyraclostrobin (Pyr) was beneficial for plant quality and productivity in several field trials. However, in addition to the benefits of disease control due to the innate fungicidal activity of Pyr, it remains to be understood whether the coapplication of BL+ Pyr exerts additional growth-promoting effects. For this purpose, the effects of BL treatment, Pyr treatment, and BL+ Pyr treatment in Arabidopsis thaliana were compared. The results showed that the yield increased at a rate of 25.6% in the BL+Pyr group and 9.7% in the BL group, but no significant change was observed in the Pyr group. Furthermore, the BL+Pyr treatment increased the fresh weight of both the leaves and the inflorescences. In contrast, the Pyr and BL treatments only increased the fresh weight of leaves and inflorescences, respectively. Additionally, the BL + Pyr treatment increased the Pn, Gs, Tr, Vc, max, Jmax, VTPU, ETR, Fv'/Fm', ΦPSII, Rd, AYE and Rubisco enzyme activity by 26%, 38%, 40%, 16%, 19%, 15%, 9%, 10%, 17%, 179%, 18% and 32%, respectively. While, these paraments did not change significantly by the BL or Pyr treatments. Treatment with BL + Pyr and Pyr, rather than BL, improved the chlorophyll a and chlorophyll b contents by upregulating genes related to chlorophyll biosynthesis and downregulating genes related to chlorophyll degradation. Additionally, according to transcriptomic and metabolomic analysis, the BL+ Pyr treatment outperformed the individual BL or Pyr treatments in activating the transcription of genes involved in photosynthesis and increasing sugar accumulation. Our results first validated that the combined usage of BL and Pyr exerted striking synergistic effects on enhancing plant biomass and yield by increasing photosynthetic efficiency. These results might provide new understanding for the agricultural effects by the co-application of BL and Pyr, and it might stimulate the efforts to develop new environment-friendly replacement for Pyr to minimize the ecotoxicology of Pyr.
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Affiliation(s)
- Ya-Qi An
- *Correspondence: Ya-Qi An, ; Zhen Xi,
| | | | | | | | | | | | | | - Zhen Xi
- *Correspondence: Ya-Qi An, ; Zhen Xi,
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Sreeharsha RV, Mudalkar S, Reddy AR. Genome sequencing and analysis uncover the regulatory elements involved in the development and oil biosynthesis of Pongamia pinnata (L.) - A potential biodiesel feedstock. FRONTIERS IN PLANT SCIENCE 2022; 13:747783. [PMID: 36092428 PMCID: PMC9454018 DOI: 10.3389/fpls.2022.747783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
Due to rapid industrialization, the consumption of petro-products has increased, while fossil fuel resources have been gradually depleted. There has been a resurgence of interest in plant-derived biofuels as a sustainable alternative to fossil fuels for the purpose of reducing greenhouse gas emissions. Pongamia pinnata L., which is also known as Millettia pinnata is an oil-yielding, leguminous tree with a large and complex genome. Despite its multiple industrial applications, this orphan tree species has inconsistent yields and a limited understanding of its functional genomics. We assessed physiological and morphological characteristics of five high-yielding pongamia accessions and deduced important yield descriptors. Furthermore, we sequenced the genome of this potential biofuel feedstock using Illumina HiSeq, NextSeq, and MiSeq platforms to generate paired-end reads. Around 173 million processed reads amounting to 65.2 Gb were assembled into a 685 Mb genome, with a gap rate of 0.02%. The sequenced scaffolds were used to identify 30,000 gene models, 406,385 Simple-Sequence-Repeat (SSR) markers, and 43.6% of repetitive sequences. We further analyzed the structural information of genes belonging to certain key metabolic pathways, including lipid metabolism, photosynthesis, circadian rhythms, plant-pathogen interactions, and karanjin biosynthesis, all of which are commercially significant for pongamia. A total of 2,219 scaffolds corresponding to 29 transcription factor families provided valuable information about gene regulation in pongamia. Similarity studies and phylogenetic analysis revealed a monophyletic group of Fabaceae members wherein pongamia out-grouped from Glycine max and Cajanus cajan, revealing its unique ability to synthesize oil for biodiesel. This study is the first step toward completing the genome sequence of this imminent biofuel tree species. Further attempts at re-sequencing with different read chemistry will certainly improve the genetic resources at the chromosome level and accelerate the molecular breeding programs.
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Affiliation(s)
- Rachapudi Venkata Sreeharsha
- Department of Plant Sciences, University of Hyderabad, Hyderabad, India
- Department of Life Sciences, Chhatrapati Shahu Ji Maharaj University, Kanpur, India
| | - Shalini Mudalkar
- Department of Tree Breeding and Improvement, Forest College and Research Institute (FCRI), Hyderabad, India
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Li Y, Yu C, Mo R, Zhu Z, Dong Z, Hu X, Deng W, Zhuang C. Screening and Verification of Photosynthesis and Chloroplast-Related Genes in Mulberry by Comparative RNA-Seq and Virus-Induced Gene Silencing. Int J Mol Sci 2022; 23:ijms23158620. [PMID: 35955752 PMCID: PMC9368790 DOI: 10.3390/ijms23158620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/20/2022] [Accepted: 07/29/2022] [Indexed: 12/05/2022] Open
Abstract
Photosynthesis is one of the most important factors in mulberry growth and production. To study the photosynthetic regulatory network of mulberry we sequenced the transcriptomes of two high-yielding (E1 and E2) and one low-yielding (H32) mulberry genotypes at two-time points (10:00 and 12:00). Re-annotation of the mulberry genome based on the transcriptome sequencing data identified 22,664 high-quality protein-coding genes with a BUSCO-assessed completeness of 93.4%. A total of 6587 differentially expressed genes (DEGs) were obtained in the transcriptome analysis. Functional annotation and enrichment revealed 142 out of 6587 genes involved in the photosynthetic pathway and chloroplast development. Moreover, 3 out of 142 genes were further examined using the VIGS technique; the leaves of MaCLA1- and MaTHIC-silenced plants were markedly yellowed or even white, and the leaves of MaPKP2-silenced plants showed a wrinkled appearance. The expression levels of the ensiled plants were reduced, and the levels of chlorophyll b and total chlorophyll were lower than those of the control plants. Co-expression analysis showed that MaCLA1 was co-expressed with CHUP1 and YSL3; MaTHIC was co-expressed with MaHSP70, MaFLN1, and MaEMB2794; MaPKP2 was mainly co-expressed with GH9B7, GH3.1, and EDA9. Protein interaction network prediction revealed that MaCLA1 was associated with RPE, TRA2, GPS1, and DXR proteins; MaTHIC was associated with TH1, PUR5, BIO2, and THI1; MaPKP2 was associated with ENOC, LOS2, and PGI1. This study offers a useful resource for further investigation of the molecular mechanisms involved in mulberry photosynthesis and preliminary insight into the regulatory network of photosynthesis.
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Affiliation(s)
- Yong Li
- College of Life Sciences, South China Agricultural University, Guangzhou 510642, China;
- Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (C.Y.); (R.M.); (Z.Z.); (Z.D.); (X.H.)
| | - Cui Yu
- Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (C.Y.); (R.M.); (Z.Z.); (Z.D.); (X.H.)
| | - Rongli Mo
- Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (C.Y.); (R.M.); (Z.Z.); (Z.D.); (X.H.)
| | - Zhixian Zhu
- Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (C.Y.); (R.M.); (Z.Z.); (Z.D.); (X.H.)
| | - Zhaoxia Dong
- Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (C.Y.); (R.M.); (Z.Z.); (Z.D.); (X.H.)
| | - Xingming Hu
- Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (C.Y.); (R.M.); (Z.Z.); (Z.D.); (X.H.)
| | - Wen Deng
- Cash Crops Research Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China; (C.Y.); (R.M.); (Z.Z.); (Z.D.); (X.H.)
- Correspondence: (W.D.); (C.Z.); Tel.: +86-27-87106001 (W.D.); +86-20-85288399 (C.Z.)
| | - Chuxiong Zhuang
- College of Life Sciences, South China Agricultural University, Guangzhou 510642, China;
- Correspondence: (W.D.); (C.Z.); Tel.: +86-27-87106001 (W.D.); +86-20-85288399 (C.Z.)
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Lu W, Wei G, Zhou B, Liu J, Zhang S, Guo J. A comparative analysis of photosynthetic function and reactive oxygen species metabolism responses in two hibiscus cultivars under saline conditions. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 184:87-97. [PMID: 35636335 DOI: 10.1016/j.plaphy.2022.05.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/29/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
Hibiscus (Hibiscus syriacus Linn.) is considered to be an important flowering shrub in Asia, and has high medicinal value. However, there are few studies on its cultivation and application in salinity soils. To understand the photosynthetic adaptive strategies employed by hibiscus to deal with saline conditions, the potential tolerant [H. syriacus 'Duede Brabaul' (DB)] and sensitive [H. syriacus 'Blueberry Smoothie' (BS)] cultivars were grown under 0-200 mM NaCl concentrations followed by a comprehensive assessment of their photosynthetic function and reactive oxygen species (ROS) metabolism. NaCl treatment significantly reduced the chlorophyll content of the two hibiscus cultivars, and the photosynthetic carbon assimilation capacity of the hibiscus leaves decreased, which was a result of stomatal and nonstomatal limiting factors. With the extension of NaCl stress days, nonphotochemical quenching (NPQ) can be significantly increased, which can effectively activate the nonradiant heat energy dissipation mechanism to release excess excitation energy to reduce the damage from the stressful environment and protect itself. Moreover, DB showed high antioxidant activities of reduced glutathione, and lower accumulation of ROS compared to BS. Taken together, this work suggests that the greater oxidative damage of the sensitive cultivar BS leaves is an important reason for its higher degree of photoinhibition to PSII than those of the tolerant cultivar DB leaves under NaCl stress.
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Affiliation(s)
- Wenjing Lu
- Shandong Provincial Research Center of Demonstration Engineering Technology for Urban and Rural Landscape, State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, College of Forestry, Shandong Agricultural University, Tai'an, China
| | - Guoqing Wei
- Shandong Provincial Research Center of Demonstration Engineering Technology for Urban and Rural Landscape, State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, College of Forestry, Shandong Agricultural University, Tai'an, China
| | - Bowen Zhou
- Shandong Provincial Research Center of Demonstration Engineering Technology for Urban and Rural Landscape, State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, College of Forestry, Shandong Agricultural University, Tai'an, China
| | - Jinying Liu
- Shandong Provincial Research Center of Demonstration Engineering Technology for Urban and Rural Landscape, State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, College of Forestry, Shandong Agricultural University, Tai'an, China
| | - Shuyong Zhang
- Shandong Provincial Research Center of Demonstration Engineering Technology for Urban and Rural Landscape, State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, College of Forestry, Shandong Agricultural University, Tai'an, China.
| | - Jing Guo
- Shandong Provincial Research Center of Demonstration Engineering Technology for Urban and Rural Landscape, State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, College of Forestry, Shandong Agricultural University, Tai'an, China.
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Ravi Kiran B, Venkata Mohan S. Phycoremediation potential ofTetradesmus sp.SVMIICT4in treating dairy wastewaterusingFlat-Panel photobioreactor. BIORESOURCE TECHNOLOGY 2022; 345:126446. [PMID: 34861385 DOI: 10.1016/j.biortech.2021.126446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Tetradesmus sp. SVMIICT4 was isolated and cultivated mixotrophically in a flat-panel photobioreactor (FP-PBR) for concurrent dairy wastewater treatment, carbon fixation, and biomass production. Integrated wastewater treatment showed good COD and nutrients removal efficiency accounting for biomass with an accumulation of carbohydrate (21.48 mg g-1) and protein (19.52 mg g-1). Chlorophyll a fluorescence transients (Fv/Fm, ETo/RC, TRo/RC, and Abs/RC) deduced through OJIP curve fittings, showed consistent improvement in photosynthetic activity throughout the cultivation period. The absorption flux per reaction centre corroborated with increased chlorophyll content (18.94 mg g-1), resulting in higher electron transport (ET/Rc) and lower non-photochemical quenching (NPQ). The fatty acid profile showed high content of unsaturated, followed by saturated fatty acids, which has multiple applications in food, feed, and fuel industries, enabling a bio-based economy.
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Affiliation(s)
- Boda Ravi Kiran
- Bioengineering and Environmental Sciences Lab, Department of Energy and Environmental Engineering (DEE), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - S Venkata Mohan
- Bioengineering and Environmental Sciences Lab, Department of Energy and Environmental Engineering (DEE), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
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Marriboina S, Sekhar KM, Subramanyam R, Reddy AR. Physiological, Biochemical, and Root Proteome Networks Revealed New Insights Into Salt Tolerance Mechanisms in Pongamia pinnata (L.) Pierre. FRONTIERS IN PLANT SCIENCE 2022; 12:771992. [PMID: 35140728 PMCID: PMC8818674 DOI: 10.3389/fpls.2021.771992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Cultivation of potential biofuel tree species such as Pongamia pinnata would rehabilitate saline marginal lands toward economic gains. We carried out a physiological, biochemical, and proteomic analysis to identify key regulatory responses which are associated with salt tolerance mechanisms at the shoot and root levels. Pongamia seedlings were grown at 300 and 500 mM NaCl (∼3% NaCl; sea saline equivalent) concentrations for 15 and 30 days, gas exchange measurements including leaf net photosynthetic rate (A sat ), stomatal conductance (g s ), and transpiration rate (E), and varying chlorophyll a fluorescence kinetics were recorded. The whole root proteome was quantified using the free-labeled nanoLC-MS/MS technique to investigate crucial proteins involved in signaling pathways associated with salt tolerance. Pongamia showed no visible salt-induced morphological symptoms. However, Pongamia showed about 50% decline in gas exchange parameters including A sat , E, and g s 15 and 30 days after salt treatment (DAS). The maximum potential quantum efficiency of photosystem (PS) II (Fv/Fm) was maintained at approximately 0.8 in salt-treated plants. The thermal component of PSII (DIo) was increased by 1.6-fold in the salt-treated plants. A total of 1,062 protein species were identified with 130 commonly abundant protein species. Our results also elucidate high abundance of protein species related to flavonoid biosynthesis, seed storage protein species, and carbohydrate metabolism under salt stress. Overall, these analyses suggest that Pongamia exhibited sustained leaf morphology by lowering net photosynthetic rates and emitting most of its light energy as heat. Our root proteomic results indicated that these protein species were most likely recruited from secondary and anaerobic metabolism, which could provide defense for roots against Na+ toxicity under salt stress conditions.
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Hou Z, Xu D, Deng N, Li Y, Yang L, Li S, Zhou H, Huang Q, Wang X. Comparative Proteomics of Mulberry Leaves at Different Developmental Stages Identify Novel Proteins Function Related to Photosynthesis. FRONTIERS IN PLANT SCIENCE 2021; 12:797631. [PMID: 35003187 PMCID: PMC8739898 DOI: 10.3389/fpls.2021.797631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 11/24/2021] [Indexed: 06/14/2023]
Abstract
Mulberry leaves at different positions are different in photosynthetic rate, nutrient substance and feeding impact to silkworms. Here, we investigated the proteomic differences of the first (L1), sixth (L6), and twentieth (L20) mulberry leaves at different stem positions (from top to the base) using a label-free quantitative proteomics approach. L1 contained less developed photosynthetic apparatus but was more active in protein synthesis. L20 has more channel proteins and oxidoreductases relative to L6. Proteins that detected in all measured leaves were classified into three groups according to their expression patterns in L1, L6, and L20. The protein group that displayed the maximum amount in L6 has the highest possibility that function related to photosynthesis. Nine function unknown proteins belong to this group were further analyzed in the light responsive expression, evolutionary tree and sub-cellular localization analysis. Based on the results, five proteins were suggested to be involved in photosynthesis. Taken together, these results reveal the molecular details of different roles of mulberry leaves at different developmental stages and contribute to the identification of five proteins that might function related to photosynthesis.
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Affiliation(s)
- Zhiwei Hou
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Dashun Xu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Na Deng
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Yan Li
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Luoling Yang
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Shuxuan Li
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Hong Zhou
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Qintao Huang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Xiling Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
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Divya Kuravi S, Venkata Mohan S. Mixotrophic cultivation of isolated Messastrum gracile SVMIICT7: Photosynthetic response and product profiling. BIORESOURCE TECHNOLOGY 2021; 341:125798. [PMID: 34469817 DOI: 10.1016/j.biortech.2021.125798] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 08/10/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
The isolated Messastrum gracile SVMIICT7 was mixotrophically cultivated in flat panel photobioreactor (FP-PBR) towards understanding the photosynthetic transient and product profile. Biomass productivity attained a maximum of 45 mg L-1d-1, with COD, nitrate and phosphate removal of 83.3%, 84.05%, and 74.98% respectively. Messastrum sp. showed good assimilation of proteins (124 mg g-1) (w/w), carbohydrates (119 mg g-1) (w/w) and lipids (26%) (w/w). The myristoleic acid (C14:1-39.1%) and heptadecanoic acid (C17:0-29.1%) are abundant fatty acids with therapeutic, food and feed applications. The cellular ultrastructure studies revealed facile arrangement of chloroplast and starch covered pyrenoids supporting increased carbohydrate accumulation. Photosystem II (PSII) [Y(II), ETR(II), Y(NPQ), and Y(NO)] and photosystem I (PSI) [Y(I), ETR(I), Y(NA), and Y(ND)] transients showed improved photosynthetic efficiency directing microalgae growth and biomass productivity. Higher Fv/Fm values indicates relatively good water splitting and carbon fixation at PSII and PSI facilitating improved photosynthetic electron transport and synthesis of value-added products thereby enabling bioeconomy.
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Affiliation(s)
- Sri Divya Kuravi
- Bioengineering and Environmental Sciences Lab, Department of Energy and Environmental Engineering (DEEE), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - S Venkata Mohan
- Bioengineering and Environmental Sciences Lab, Department of Energy and Environmental Engineering (DEEE), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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13
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Agüera E, de la Haba P. Climate Change Impacts on Sunflower ( Helianthus annus L.) Plants. PLANTS (BASEL, SWITZERLAND) 2021; 10:2646. [PMID: 34961117 PMCID: PMC8705722 DOI: 10.3390/plants10122646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/18/2022]
Abstract
The biochemical, biological, and morphogenetic processes of plants are affected by ongoing climate change, causing alterations in crop development, growth, and productivity. Climate change is currently producing ecosystem modifications, making it essential to study plants with an improved adaptive capacity in the face of environmental modifications. This work examines the physiological and metabolic changes taking place during the development of sunflower plants due to environmental modifications resulting from climate change: elevated concentrations of atmospheric carbon dioxide (CO2) and increased temperatures. Variations in growth, and carbon and nitrogen metabolism, as well as their effect on the plant's oxidative state in sunflower (Helianthus annus L.) plants, are studied. An understanding of the effect of these interacting factors (elevated CO2 and elevated temperatures) on plant development and stress response is imperative to understand the impact of climate change on plant productivity.
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Affiliation(s)
- Eloísa Agüera
- Department of Botany, Ecology and Plant Physiology, Faculty of Science, University of Córdoba, 14071 Córdoba, Spain;
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Sekhar KM, Kota VR, Reddy TP, Rao KV, Reddy AR. Amelioration of plant responses to drought under elevated CO 2 by rejuvenating photosynthesis and nitrogen use efficiency: implications for future climate-resilient crops. PHOTOSYNTHESIS RESEARCH 2021; 150:21-40. [PMID: 32632534 DOI: 10.1007/s11120-020-00772-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 06/24/2020] [Indexed: 05/15/2023]
Abstract
The contemporary global agriculture is beset with serious threats from diverse eco-environmental conditions causing decreases in crop yields by ~ 15%. These yield losses might increase further due to climate change scenarios leading to increased food prices triggering social unrest and famines. Urbanization and industrialization are often associated with rapid increases in greenhouse gases (GHGs) especially atmospheric CO2 concentration [(CO2)]. Increase in atmospheric [CO2] significantly improved crop photosynthesis and productivity initially which vary with plant species, genotype, [CO2] exposure time and biotic as well as abiotic stress factors. Numerous attempts have been made using different plant species to unravel the physiological, cellular and molecular effects of elevated [CO2] as well as drought. This review focuses on plant responses to elevated [CO2] and drought individually as well as in combination with special reference to physiology of photosynthesis including its acclimation. Furthermore, the functional role of nitrogen use efficiency (NUE) and its relation to photosynthetic acclimation and crop productivity under elevated [CO2] and drought are reviewed. In addition, we also discussed different strategies to ameliorate the limitations of ribulose-1,5-bisphosphate (RuBP) carboxylation and RuBP regeneration. Further, improved stomatal and mesophyll conductance and NUE for enhanced crop productivity under fast changing global climate conditions through biotechnological approaches are also discussed here. We conclude that multiple gene editing approaches for key events in photosynthetic processes would serve as the best strategy to generate resilient crop plants with improved productivity under fast changing climate.
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Affiliation(s)
- Kalva Madhana Sekhar
- Center for Plant Molecular Biology (CPMB), Osmania University, Hyderabad, Telangana, 500007, India
| | - Vamsee Raja Kota
- Center for Plant Molecular Biology (CPMB), Osmania University, Hyderabad, Telangana, 500007, India
| | - T Papi Reddy
- Center for Plant Molecular Biology (CPMB), Osmania University, Hyderabad, Telangana, 500007, India
| | - K V Rao
- Center for Plant Molecular Biology (CPMB), Osmania University, Hyderabad, Telangana, 500007, India
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Ravi Kiran B, Venkata Mohan S. Photosynthetic transients in Chlorella sorokiniana during phycoremediation of dairy wastewater under distinct light intensities. BIORESOURCE TECHNOLOGY 2021; 340:125593. [PMID: 34311176 DOI: 10.1016/j.biortech.2021.125593] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/11/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
The present study is aimed to understand the photosynthetic transients of Chlorella sorokiniana SVMBIOEN2 during treatment of dairy wastewater under different light intensities (100, 150, and 200 µmol m-2s-1) in mixotrophic mode. Light intensities showed marked influence on photosystem behavior, lipid profile, and organic pollutant removal. Analysis of Chlorophyll a fluorescence transient including Fv/Fm, ETo/RC, TRo/RC, and Abs/RC showed better photosystem efficiency at 100 µmol m-2s-1 operations. OJIP curve fitting depicted a positive L-band at 150 µmol m-2s-1 indicating lower kinetic energy of photosystem II (PSII) reaction centres at high light intensities. Better photosynthetic activity at 100 µmol m-2s-1 operations resulted in good assimilation of biomass (2.3 g L-1), carbohydrates (10.2 mg g-1), and proteins (14 mg g-1) with a significant reduction in chemical oxygen demand (85%). Phycoremediation of dairy wastewater accumulates predominantly monounsaturated fatty acids followed by polyunsaturated fatty acids showing the application of C. sorokiniana in nutraceutical and food industries.
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Affiliation(s)
- Boda Ravi Kiran
- Bioengineering and Environmental Sciences Lab, Department of Energy and Environmental Engineering (DEE), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - S Venkata Mohan
- Bioengineering and Environmental Sciences Lab, Department of Energy and Environmental Engineering (DEE), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
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16
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Effect of enriched CO2 atmosphere on morphological and chemical characteristics of Alternanthera philoxeroides. ACTA OECOLOGICA 2021. [DOI: 10.1016/j.actao.2021.103761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Shi S, Luo X, Dong X, Qiu Y, Xu C, He X. Arbuscular Mycorrhization Enhances Nitrogen, Phosphorus and Potassium Accumulation in Vicia faba by Modulating Soil Nutrient Balance under Elevated CO 2. J Fungi (Basel) 2021; 7:jof7050361. [PMID: 34063150 PMCID: PMC8148158 DOI: 10.3390/jof7050361] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/01/2021] [Accepted: 05/02/2021] [Indexed: 01/15/2023] Open
Abstract
Effects of arbuscular mycorrhizal fungi (AMF), elevated carbon dioxide (eCO2), and their interaction on nutrient accumulation of leguminous plants and soil fertility is unknown. Plant growth, concentrations of tissue nitrogen (N), phosphorus (P), and potassium (K) in 12-week-old nodulated faba bean (Vicia faba, inoculated with Rhizobium leguminosarum bv. NM353), and nutrient use efficiency were thus assessed under ambient CO2 (410/460 ppm, daytime, 07:00 a.m.–19:00 p.m./nighttime, 19:00 p.m.–07:00 a.m.) and eCO2 (550/610 ppm) for 12 weeks with or without AM fungus of Funneliformis mosseae inoculation. eCO2 favored AMF root colonization and nodule biomass production. eCO2 significantly decreased shoot N, P and K concentrations, but generally increased tissue N, P and K accumulation and their use efficiency with an increased biomass production. Meanwhile, eCO2 enhanced C allocation into soil but showed no effects on soil available N, P, and K, while AM symbiosis increased accumulation of C, N, P, and K in both plant and soil though increased soil nutrient uptake under eCO2. Moreover, plant acquisition of soil NO3−–N and NH4+–N respond differently to AMF and eCO2 treatments. As a result, the interaction between AM symbiosis and eCO2 did improve plant C accumulation and soil N, P, and K uptake, and an alternative fertilization for legume plantation should be therefore taken under upcoming atmosphere CO2 rising. Future eCO2 studies should employ multiple AMF species, with other beneficial fungal or bacterial species, to test their interactive effects on plant performance and soil nutrient availability in the field, under other global change events including warming and drought.
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Affiliation(s)
- Songmei Shi
- Centre of Excellence for Soil Biology, College of Resources and Environment, and Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400716, China; (S.S.); (X.L.); (X.D.); (Y.Q.); (C.X.)
- National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in Three Gorges Reservoir Region, Chongqing 400716, China
| | - Xie Luo
- Centre of Excellence for Soil Biology, College of Resources and Environment, and Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400716, China; (S.S.); (X.L.); (X.D.); (Y.Q.); (C.X.)
- National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in Three Gorges Reservoir Region, Chongqing 400716, China
| | - Xingshui Dong
- Centre of Excellence for Soil Biology, College of Resources and Environment, and Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400716, China; (S.S.); (X.L.); (X.D.); (Y.Q.); (C.X.)
- National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in Three Gorges Reservoir Region, Chongqing 400716, China
| | - Yuling Qiu
- Centre of Excellence for Soil Biology, College of Resources and Environment, and Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400716, China; (S.S.); (X.L.); (X.D.); (Y.Q.); (C.X.)
- National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in Three Gorges Reservoir Region, Chongqing 400716, China
| | - Chenyang Xu
- Centre of Excellence for Soil Biology, College of Resources and Environment, and Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400716, China; (S.S.); (X.L.); (X.D.); (Y.Q.); (C.X.)
- National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in Three Gorges Reservoir Region, Chongqing 400716, China
| | - Xinhua He
- Centre of Excellence for Soil Biology, College of Resources and Environment, and Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400716, China; (S.S.); (X.L.); (X.D.); (Y.Q.); (C.X.)
- National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in Three Gorges Reservoir Region, Chongqing 400716, China
- School of Biological Sciences, University of Western Australia, Perth, WA 6009, Australia
- Correspondence: ; Tel.: +86-187-2328-9058
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Sreeharsha RV, Venkata Mohan S. Symbiotic integration of bioprocesses to design a self-sustainable life supporting ecosystem in a circular economy framework. BIORESOURCE TECHNOLOGY 2021; 326:124712. [PMID: 33517050 DOI: 10.1016/j.biortech.2021.124712] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/07/2021] [Accepted: 01/08/2021] [Indexed: 06/12/2023]
Abstract
Climate change, resource depletion and unsustainable crop productivity are major challenges that mankind is currently facing. Natural ecosystems of earth's biosphere are becoming vulnerable and there is a need to design Bioregenerative Life Support Systems (BLSS) which are ecologically engineered microcosms that could effectively deal with problems associated with urbanization and industrialization in a sustainable manner. The principles of BLSS could be integrated with waste fed biorefineries and solar energy to create a self-sustainable bioregenerative ecosystem (SSBE). Such engineered ecosystems will have potential to fulfil urban life essentials and climate change mitigation thus generating ecologically smart and resilient communities which can strengthen the global economy. This article provides a detailed overview on SSBE framework and its improvement in the contemporary era to achieve circular bioeconomy by means of effective resource recycling.
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Affiliation(s)
- Rachapudi Venkata Sreeharsha
- Bioengineering and Environmental Science Laboratory, Department of Energy and Environmental, Engineering, CSIR- Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - S Venkata Mohan
- Bioengineering and Environmental Science Laboratory, Department of Energy and Environmental, Engineering, CSIR- Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
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19
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Shi S, Qiu Y, Wen M, Xu X, Dong X, Xu C, He X. Daytime, Not Nighttime, Elevated Atmospheric Carbon Dioxide Exposure Improves Plant Growth and Leaf Quality of Mulberry ( Morus alba L.) Seedlings. FRONTIERS IN PLANT SCIENCE 2021; 11:609031. [PMID: 33613585 PMCID: PMC7890035 DOI: 10.3389/fpls.2020.609031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
Almost all elevated atmospheric CO2 concentrations (eCO2) studies have not addressed the potential responses of plant growth to different CO2 in daytime and nighttime. The present study was to determine the impact of daytime and/or nighttime eCO2 on growth and quality of mulberry (Morus alba L.), a perennial multipurpose cash plant. Six-month-old mulberry seedlings were hence grown in environmentally auto-controlled growth chambers under four CO2 concentrations: (1) ambient CO2 (ACO2, 410 μmol mol-1 daytime/460 μmol mol-1 nighttime), (2) sole daytime elevated CO2 (DeCO2, 710 μmol mol-1/460 μmol mol-1), (3) sole nighttime elevated CO2 (NeCO2, 410 μmol mol-1/760 μmol mol-1), and (4) continuous daytime and nighttime elevated CO2 (D + NeCO2, 710 μmol mol-1/760 μmol mol-1). Plant growth characteristics, nutrient uptake, and leaf quality were then examined after 120 days of CO2 exposure. Compared to control, DeCO2 and (D + N)eCO2 increased plant biomass production and thus the harvest of nutrients and accumulation of leaf carbohydrates (starch, soluble sugar, and fatty acid) and N-containing compounds (free amino acid and protein), though there were some decreases in the concentration of leaf N, P, Mg, Fe, and Zn. NeCO2 had no significant effects on leaf yield but an extent positive effect on leaf nutritional quality due to their concentration increase in leaf B, Cu, starch, and soluble sugar. Meanwhile, (D + N)eCO2 decreased mulberry leaf yield and harvest of nutritious compounds for silkworm when compared with DeCO2. The reason may be associated to N, P, Mg, Fe, and Zn that are closely related to leaf pigment and N metabolism. Therefore, the rational application of mineral nutrient (especially N, P, Fe, Mg, and Zn) fertilizers is important for a sustainable mulberry production under future atmosphere CO2 concentrations.
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Affiliation(s)
- Songmei Shi
- Centre of Excellence for Soil Biology, School of Resource and Environment, Southwest University, Chongqing, China
| | - Yuling Qiu
- Centre of Excellence for Soil Biology, School of Resource and Environment, Southwest University, Chongqing, China
| | - Miao Wen
- Centre of Excellence for Soil Biology, School of Resource and Environment, Southwest University, Chongqing, China
| | - Xiao Xu
- Key Laboratory of Southwest China Wildlife Resources Conservation (China West Normal University), Ministry of Education, Nanchong, China
| | - Xingshui Dong
- Centre of Excellence for Soil Biology, School of Resource and Environment, Southwest University, Chongqing, China
| | - Chenyang Xu
- Centre of Excellence for Soil Biology, School of Resource and Environment, Southwest University, Chongqing, China
| | - Xinhua He
- Centre of Excellence for Soil Biology, School of Resource and Environment, Southwest University, Chongqing, China
- School of Biological Sciences, University of Western Australia, Perth, WA, Australia
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20
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Li P, Zhu Y, Song X, Song F. Negative effects of long-term moderate salinity and short-term drought stress on the photosynthetic performance of Hybrid Pennisetum. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 155:93-104. [PMID: 32745934 DOI: 10.1016/j.plaphy.2020.06.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/19/2020] [Accepted: 06/19/2020] [Indexed: 05/24/2023]
Abstract
Plants are always suffering periods of soil water deficit and sustained soil salinity during their life cycle. Unraveling the mechanisms underpinning the responses of plants, especially the photosynthesis, to drought, salinity, and co-occurring stresses is critical for both the protection of natural vegetation and the stabilization of crop production. To better understand the downregulation of photosynthetic capability induced by soil salinity and drought, gas exchange parameters, leaf pigment contents, and chlorophyll (Chl) a fluorescence transients were analyzed in leaves of Hybrid Pennisetum. Our results showed that long-term moderate salinity, short-term drought, and the combination of these stressors decreased leaf pigment content by 11.4-31.5% and net photosynthetic rate (Pn) by 14.6-67.6% compared to those in untreated plants. The reduction of Pn in Hybrid Pennisetum under long-term salinity stress mainly occurred by stomatal limitation, whereas non-stomatal limitation played a dominant role under short-term drought stress. The changes in Chl a fluorescence kinetics (especially the appearance of the L-band and K-band) in both stress treatments showed that salinity and drought stress damaged the structural stability of photosystem II (PSII) and disturbed the equilibrium between the electrons at the acceptor and donor sides of PSII. Furthermore, although the negative effect of drought stress on leaf photosynthesis was much greater than that of salinity stress, moderate salt stress alleviated the negative effect of drought stress on the photosynthetic performance of Hybrid Pennisetum after long acclimation times.
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Affiliation(s)
- Peidong Li
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
| | - Yufei Zhu
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
| | - Xiliang Song
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China.
| | - Fupeng Song
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China.
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21
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Ranadheer P, Kona R, Sreeharsha RV, Venkata Mohan S. Non-lethal nitrate supplementation enhances photosystem II efficiency in mixotrophic microalgae towards the synthesis of proteins and lipids. BIORESOURCE TECHNOLOGY 2019; 283:373-377. [PMID: 30929825 DOI: 10.1016/j.biortech.2019.03.089] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/15/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
The current study is aimed at understanding the effect of two different concentrations of nitrate (NaNO3) i.e., 2.94 mM (1X) and 8.82 mM (3X) on the productivity of Scenedesmus sp. in terms photosynthetic efficiency, growth, biomass and protein/lipid synthesis. The experiments were conducted by growing the microalgae in mixotrophic mode with a fixed dissolved organic carbon (110 mM). Chlorophyll a fluorescence fast kinetics parameter such as FV/FM, FM/FO, Pi_Abs, TRo/RC and ABS/RC depicted an improved PSII efficiency in 3X conditions. Higher nitrate concentration in BBM medium favored better assimilation of chlorophyll pigments, carbohydrates (160 mg/g), proteins (524 mg/g) and total lipids along with higher biomass (11.4 g/L). The microalgae cell growth, biomass and biochemical composition are significantly influenced by excess nitrates supplementation in the growth medium.
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Affiliation(s)
- Palle Ranadheer
- Bioengineering and Environmental Sciences Lab, CEEFF, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - Rajesh Kona
- Bioengineering and Environmental Sciences Lab, CEEFF, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India; Academy of Scientific and Innovative Research (AcSIR), India
| | - Rachapudi Venkata Sreeharsha
- Bioengineering and Environmental Sciences Lab, CEEFF, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - S Venkata Mohan
- Bioengineering and Environmental Sciences Lab, CEEFF, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India; Academy of Scientific and Innovative Research (AcSIR), India.
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Sreeharsha RV, Mudalkar S, Sengupta D, Unnikrishnan DK, Reddy AR. Mitigation of drought-induced oxidative damage by enhanced carbon assimilation and an efficient antioxidative metabolism under high CO 2 environment in pigeonpea (Cajanus cajan L.). PHOTOSYNTHESIS RESEARCH 2019; 139:425-439. [PMID: 30244353 DOI: 10.1007/s11120-018-0586-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 09/14/2018] [Indexed: 06/08/2023]
Abstract
In the current study, pigeonpea (Cajanus cajan L.), a promising legume food crop was assessed for its photosynthetic physiology, antioxidative system as well as C and N metabolism under elevated CO2 and combined drought stress (DS). Pigeonpea was grown in open top chambers under elevated CO2 (600 µmol mol-1) and ambient CO2 (390 ± 20 µmol mol-1) concentrations, later subjected to DS by complete water withholding. The DS plants were re-watered and recovered (R) to gain normal physiological growth and assessed the recoverable capacity in both elevated and ambient CO2 concentrations. The elevated CO2 grown pigeonpea showed greater gas exchange physiology, nodule mass and total dry biomass over ambient CO2 grown plants under well-watered (WW) and DS conditions albeit a decrease in leaf relative water content (LRWC). Glucose, fructose and sucrose levels were measured to understand the role of hexose to sucrose ratios (H:S) in mediating the drought responses. Free amino acid levels as indicative of N assimilation provided insights into C and N balance under DS and CO2 interactions. The enzymatic and non-enzymatic antioxidants showed significant upregulation in elevated CO2 grown plants under DS thereby protecting the plant from oxidative damage caused by the reactive oxygen species. Our results clearly demonstrated the protective role of elevated CO2 under DS at lower LRWC and gained comparative advantage of mitigating the DS-induced damage over ambient CO2 grown pigeonpea.
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Affiliation(s)
- Rachapudi Venkata Sreeharsha
- Photosynthesis and Climate Change Laboratory, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Shalini Mudalkar
- Photosynthesis and Climate Change Laboratory, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Debashree Sengupta
- Photosynthesis and Climate Change Laboratory, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Divya K Unnikrishnan
- Photosynthesis and Climate Change Laboratory, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Attipalli Ramachandra Reddy
- Photosynthesis and Climate Change Laboratory, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India.
- Yogi Vemana University, Kadapa, Andhra Pradesh, 516003, India.
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Wu X, Ding Y, Wang R, Rensing C, Li Y, Feng R. Differences in the uptake and bioconcentration of dichlorodiphenyltrichloroethane by eight vegetable cultivars and their health risk assessments. CHEMOSPHERE 2019; 215:596-604. [PMID: 30342404 DOI: 10.1016/j.chemosphere.2018.10.039] [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: 07/10/2018] [Revised: 09/27/2018] [Accepted: 10/06/2018] [Indexed: 06/08/2023]
Abstract
Dichlorodiphenyltrichloroethane (DDT) is not easily degraded in soils, which will pose a threat to human health. We investigated the differences of eight vegetables' capacity to take up DDT, removing DDT from soil, and tolerating DDT (monitoring the responses of growth, root morphology and photosynthesis of vegetables to DDT). These vegetables included Chinese mustard (two genotypes, B.jf and B,jm), napa cabbage (two genotypes, B.coz and B.coc) and Bok choy (four genotypes, B.cz, B.cq, B.cs and B.chg). The results demonstrated that 5 mg kg-1 DDT did not display significant effects on the growth of most vegetables in this study. As compared to the control, 5 mg kg-1 DDT significantly increased the shoot and root biomass, the fine root numbers, and the fine root ratio for the genotype of B.chg. However, 5 mg kg-1 DDT exposure showed a negative effect on the shoot growth of two genotypes of napa cabbage. In general, 5 mg kg-1 DDT did not significantly affect the photosynthesis and root morphology of most vegetables in this study. Consuming these vegetables had a low non-cancer health risk, but showed a high cancer health risk. In addition, among the eight vegetables, B.chg accumulated less DDT in the edible parts and had low values of HRnon-cancer and HRcancer for consuming these vegetables containing DDT. Planting these vegetables might promote the degradation of DDT reducing its residual amount in soil.
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Affiliation(s)
- Xiaorong Wu
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China; Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin 300191, China
| | - Yongzhen Ding
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin 300191, China
| | - Ruigang Wang
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin 300191, China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China.
| | - Yuanping Li
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Renwei Feng
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou 350002, China; Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin 300191, China.
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24
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Gamage D, Thompson M, Sutherland M, Hirotsu N, Makino A, Seneweera S. New insights into the cellular mechanisms of plant growth at elevated atmospheric carbon dioxide concentrations. PLANT, CELL & ENVIRONMENT 2018; 41:1233-1246. [PMID: 29611206 DOI: 10.1111/pce.13206] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 05/05/2023]
Abstract
Rising atmospheric carbon dioxide concentration ([CO2 ]) significantly influences plant growth, development, and biomass. Increased photosynthesis rate, together with lower stomatal conductance, has been identified as the key factors that stimulate plant growth at elevated [CO2 ] (e[CO2 ]). However, variations in photosynthesis and stomatal conductance alone cannot fully explain the dynamic changes in plant growth. Stimulation of photosynthesis at e[CO2 ] is always associated with post-photosynthetic secondary metabolic processes that include carbon and nitrogen metabolism, cell cycle functions, and hormonal regulation. Most studies have focused on photosynthesis and stomatal conductance in response to e[CO2 ], despite the emerging evidence of e[CO2 ]'s role in moderating secondary metabolism in plants. In this review, we briefly discuss the effects of e[CO2 ] on photosynthesis and stomatal conductance and then focus on the changes in other cellular mechanisms and growth processes at e[CO2 ] in relation to plant growth and development. Finally, knowledge gaps in understanding plant growth responses to e[CO2 ] have been identified with the aim of improving crop productivity under a CO2 rich atmosphere.
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Affiliation(s)
- Dananjali Gamage
- Centre for Crop Health, University of Southern Queensland, Toowoomba, Queensland, 4350, Australia
- Department of Agricultural Biology, Faculty of Agriculture, University of Ruhuna, Kamburupitiya, 81 100, Sri Lanka
| | - Michael Thompson
- Centre for Crop Health, University of Southern Queensland, Toowoomba, Queensland, 4350, Australia
| | - Mark Sutherland
- Centre for Crop Health, University of Southern Queensland, Toowoomba, Queensland, 4350, Australia
| | - Naoki Hirotsu
- Centre for Crop Health, University of Southern Queensland, Toowoomba, Queensland, 4350, Australia
- Faculty of Life Sciences, Toyo University, Oura-gun, Gunma, 374-0193, Japan
| | - Amane Makino
- Division of Life Sciences, Graduate School of Agricultural Science, Tohoku University, Tsutsumidori-Amamiyamachi, Sendai, 981-8555, Japan
| | - Saman Seneweera
- Centre for Crop Health, University of Southern Queensland, Toowoomba, Queensland, 4350, Australia
- Department of Agricultural Biology, Faculty of Agriculture, University of Ruhuna, Kamburupitiya, 81 100, Sri Lanka
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Sekhar KM, Reddy KS, Reddy AR. Amelioration of drought-induced negative responses by elevated CO 2 in field grown short rotation coppice mulberry (Morus spp.), a potential bio-energy tree crop. PHOTOSYNTHESIS RESEARCH 2017; 132:151-164. [PMID: 28238122 DOI: 10.1007/s11120-017-0351-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 02/07/2017] [Indexed: 06/06/2023]
Abstract
Present study describes the responses of short rotation coppice (SRC) mulberry, a potential bio-energy tree, grown under interactive environment of elevated CO2 (E) and water stress (WS). Growth in E stimulated photosynthetic performance in well-watered (WW) as well as during WS with significant increases in light-saturated photosynthetic rates (A Sat), water use efficiency (WUEi), intercellular [CO2], and photosystem-II efficiency (F V/F M and ∆F/F M') with concomitant reduction in stomatal conductance (g s) and transpiration (E) compared to ambient CO2 (A) grown plants. Reduced levels of proline, H2O2, and malondialdehyde (MDA) and higher contents of antioxidants including ascorbic acid and total phenolics in WW and WS in E plants clearly demonstrated lesser oxidative damage. Further, A plants showed higher transcript abundance and antioxidant enzyme activities under WW as well as during initial stages of WS (15 days). However, with increasing drought imposition (30 days), A plants showed down regulation of antioxidant systems compared to their respective E plants. These results clearly demonstrated that future increased atmospheric CO2 enhances the photosynthetic potential and also mitigate the drought-induced oxidative stress in SRC mulberry. In conclusion, mulberry is a potential bio-energy tree crop which is best suitable for short rotation coppice forestry-based mitigation of increased [CO2] levels even under intermittent drought conditions, projected to prevail in the fast-changing global climate.
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Affiliation(s)
- Kalva Madhana Sekhar
- Department of Plant Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500046, Andhra Pradesh, India
| | - Kanubothula Sitarami Reddy
- Department of Plant Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500046, Andhra Pradesh, India
| | - Attipalli Ramachandra Reddy
- Department of Plant Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500046, Andhra Pradesh, India.
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Liao G, Xu Y, Chen C, Wu Q, Feng R, Guo J, Wang R, Ding Y, Sun Y, Xu Y, Xia W, Fan Z, Mo L. Root application of selenite can simultaneously reduce arsenic and cadmium accumulation and maintain grain yields, but show negative effects on the grain quality of paddy rice. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 183:733-741. [PMID: 27641653 DOI: 10.1016/j.jenvman.2016.09.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 09/04/2016] [Accepted: 09/10/2016] [Indexed: 05/09/2023]
Abstract
Most current technologies can hardly simultaneously reduce the accumulation of arsenic (As) and cadmium (Cd) in crops. In this study, root application of selenite [Se (IV)] and selenate [Se (VI)] was used to assess their abilities to reduce the accumulation of As and Cd, and maintain the yields and quality of rice grains. The results show that Se (IV) showed a weaker ability than Se (VI) to maintain the grain contents of many essential elements, but a stronger ability to decrease As and Cd contents in rice grains, and maintain the yields, photosynthesis rate and stomatal conductance, and increase the grain contents of several amino acids (AAs), total Se, selenomethionine (SeMet) and selenocysteine (SeCys). The best outcomes resulted at a relatively high application of 5 mg kg-1 Se (IV), reflecting in the highest total Se, SeCys and SeMet content (14.95, 118.70 and 864.73 μg kg-1, respectively) in the grains, highest grain yield, and lowest grain As and Cd content (0.36 and 0.07 mg kg-1, respectively). In addition, the application of 1-5 mg kg-1 Se (IV) seemed to facilitate the formation of SeMet in the grains, but most inorganic Se in the grains were transformed into SeCys and SeMet under Se (VI) treatments. This study provides a new idea to resolve the problems of high accumulation of As and Cd in rice grains and insufficiency of Se intake in China.
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Affiliation(s)
- Guojian Liao
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China; Agricultural College, Guangxi University, Nanning, China
| | - Yi Xu
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Cheng Chen
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qianhua Wu
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China; Agricultural College, Guangxi University, Nanning, China
| | - Renwei Feng
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China; Innovation Team of Remediation of Heavy Metal Contaminated Farmland Soil, Chinese Academy of Agricultural Sciences, China; Agricultural College, Guangxi University, Nanning, China.
| | - Junkang Guo
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China; Innovation Team of Remediation of Heavy Metal Contaminated Farmland Soil, Chinese Academy of Agricultural Sciences, China
| | - Ruigang Wang
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China; Innovation Team of Remediation of Heavy Metal Contaminated Farmland Soil, Chinese Academy of Agricultural Sciences, China
| | - Yongzhen Ding
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China
| | - Yang Sun
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China; Innovation Team of Remediation of Heavy Metal Contaminated Farmland Soil, Chinese Academy of Agricultural Sciences, China
| | - Yingming Xu
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China; Innovation Team of Remediation of Heavy Metal Contaminated Farmland Soil, Chinese Academy of Agricultural Sciences, China
| | - Wei Xia
- Institute of Agro-Environmental Protection, The Ministry of Agriculture, Tianjin, 300191, China
| | - Zhilian Fan
- Agricultural College, Guangxi University, Nanning, China
| | - Liangyu Mo
- Agricultural College, Guangxi University, Nanning, China
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Jia X, Zhao Y, Liu T, Huang S. Elevated CO2 affects secondary metabolites in Robinia pseudoacacia L. seedlings in Cd- and Pb-contaminated soils. CHEMOSPHERE 2016; 160:199-207. [PMID: 27376859 DOI: 10.1016/j.chemosphere.2016.06.089] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 06/16/2016] [Accepted: 06/24/2016] [Indexed: 06/06/2023]
Abstract
Secondary metabolites play important roles in plant interactions with the environment. The co-occurrence of heavy metal contamination of soils and rising atmospheric CO2 has important effects on plant. It is important to explore the ways in which production of plant secondary metabolites is affected by heavy metals under elevated atmospheric CO2. We examined the effects of elevated CO2 on secondary metabolite contents in Robinia pseudoacacia seedlings grown in Cd- and lead (Pb)-contaminated soils. The increase in secondary metabolites was greater under Cd + Pb exposure than under exposure to individual metals regardless of elevated CO2 with the exception of condensed tannins in leaves and total alkaloids in stems. Except for phenolic compounds and condensed tannins, elevated CO2 was associated with increased secondary metabolite contents in leaves and stems of plants exposed to Cd, Pb, and Cd + Pb compared to plants exposed to ambient CO2 + metals. Changes in saponins in leaves and alkaloids in stems were greater than changes in the other secondary metabolites. Significant interactive effects of CO2, Cd, and Pb on secondary metabolites were observed. Saponins in leaves and alkaloids in stems were more sensitive than other secondary metabolites to elevated CO2 + Cd + Pb. Elevated CO2 could modulate plant protection and defense mechanisms in R. pseudoacacia seedlings exposed to heavy metals by altering the production of secondary metabolites. The increased Cd and Pb uptake under elevated CO2 suggested that R. pseudoacacia may be used in the phytoremediation of heavy metal-contaminated soils under global environmental scenarios.
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Affiliation(s)
- Xia Jia
- School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Chang'an University, Xi'an 710054, PR China.
| | - Yonghua Zhao
- The School of Earth Science and Resources, Chang'an University, Xi'an 710054, PR China
| | - Tuo Liu
- School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Chang'an University, Xi'an 710054, PR China
| | - Shuping Huang
- School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Chang'an University, Xi'an 710054, PR China
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