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Bazakos C, Michailidis M, Tourvas N, Alexiou KG, Mellidou I, Polychroniadou C, Boutsika A, Xanthopoulou A, Moysiadis T, Skodra C, Kollaros MG, Glavakis E, Stournaras V, Karagiannis E, Aravanopoulos F, Molassiotis A, Tanou G, Ganopoulos I. Genetic mosaic of the Mediterranean fig: comprehensive genomic insights from a gene bank collection. PHYSIOLOGIA PLANTARUM 2024; 176:e14482. [PMID: 39149812 DOI: 10.1111/ppl.14482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 07/10/2024] [Indexed: 08/17/2024]
Abstract
High-depth whole-genome resequencing of 53 diverse fig tree genotypes yielded a rich dataset of genetic variants. We successfully identified 5,501,460 single-nucleotide polymorphisms (SNPs) and 1,228,537 insertions and deletions (InDels), providing a high-density and excellent-quality genetic map of the fig tree. We also performed a detailed population structure analysis, dividing the 53 genotypes into three geographical groups and assessing their genetic diversity and divergence. Analysis of structural variants (SVs) and copy number variations (CNVs) revealed their potential functional impact, particularly in plant-pathogen interaction and secondary metabolism. Metabolomic fingerprinting of fig genotypes uncovered extensive variation in primary metabolites and polyphenolic compounds, highlighting the influence of genotype on fruit quality traits such as nutritional content and bioactive compound composition. The genome-wide association study (GWAS) identified critical SNPs associated with fruit quality and morphological features. The discovery of significant candidate genes, such as AGL62, GDSL, and COBRA-like protein 4 genes, offers promising targets for marker-assisted selection and genome editing approaches to improve fig fruit morphological and quality traits. This extensive genomic analysis of fig trees enhances our understanding of the genetic basis of important agronomic traits and provides a rich resource for future research in this economically and nutritionally significant fruit.
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Affiliation(s)
- Christos Bazakos
- Institute of Plant Breeding and Genetic Resources, ELGO DIMITRA, Thermi, Greece
- Joint Laboratory of Horticulture, ELGO DIMITRA, Thermi, Greece
- Max Planck Institute for Plant Breeding Research, Department of Comparative Development and Genetics, Cologne, Germany
| | - Michail Michailidis
- Joint Laboratory of Horticulture, ELGO DIMITRA, Thermi, Greece
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thermi, Greece
| | - Nikolaos Tourvas
- Laboratory of Forest Genetics, Faculty of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Konstantinos G Alexiou
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain
- Institut de Recerca i Tecnologia Agroalimentàries, Barcelona, Spain
| | - Ifigeneia Mellidou
- Institute of Plant Breeding and Genetic Resources, ELGO DIMITRA, Thermi, Greece
- Joint Laboratory of Horticulture, ELGO DIMITRA, Thermi, Greece
| | - Chrysanthi Polychroniadou
- Joint Laboratory of Horticulture, ELGO DIMITRA, Thermi, Greece
- Institute of Soil and Water Resources, ELGO-DIMITRA, Thermi, Greece
| | - Anastasia Boutsika
- Institute of Plant Breeding and Genetic Resources, ELGO DIMITRA, Thermi, Greece
| | - Aliki Xanthopoulou
- Institute of Plant Breeding and Genetic Resources, ELGO DIMITRA, Thermi, Greece
- Joint Laboratory of Horticulture, ELGO DIMITRA, Thermi, Greece
| | - Theodoros Moysiadis
- Institute of Plant Breeding and Genetic Resources, ELGO DIMITRA, Thermi, Greece
- Institute of Soil and Water Resources, ELGO-DIMITRA, Thermi, Greece
- Department of Computer Science, School of Sciences and Engineering, University of Nicosia, Nicosia, Cyprus
| | - Christina Skodra
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thermi, Greece
| | - Marios-Georgios Kollaros
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thermi, Greece
| | | | - Vasileios Stournaras
- Institute of Olive Tree, Subtropical Crops and Viticulture, ELGO-DIMITRA, Department of Olive and Horticultural Crops, Kalamata, Greece
- Department of Agriculture, University of Ioannina, Arta, Greece
| | | | - Filippos Aravanopoulos
- Laboratory of Forest Genetics, Faculty of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Athanassios Molassiotis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thermi, Greece
| | - Georgia Tanou
- Joint Laboratory of Horticulture, ELGO DIMITRA, Thermi, Greece
- Institute of Soil and Water Resources, ELGO-DIMITRA, Thermi, Greece
| | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, ELGO DIMITRA, Thermi, Greece
- Joint Laboratory of Horticulture, ELGO DIMITRA, Thermi, Greece
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Zhu M, Ma W, Deng J, Liu J, Kang L, Yu J. Effect of nano-calcium on carotenoid and anthocyanin contents of nectarine fruit. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 204:108088. [PMID: 37847975 DOI: 10.1016/j.plaphy.2023.108088] [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: 02/23/2023] [Revised: 08/18/2023] [Accepted: 10/10/2023] [Indexed: 10/19/2023]
Abstract
Increasing the carotenoid content of nectarine (Prunus persica var. nucipersica) is of great significance for improving its quality and economic value. A two years study was carried out on 'Shuguang' nectarine to evaluate the effect of calcium chloride (Cl-Ca) and L-aspartic acid nano calcium [Ca (L-asp) - NPs] (nano-Ca) on carotenoid accumulation. The results show that both Cl-Ca and nano-Ca could increase the carotenoid content of nectarine fruit flesh, but the effect of nano-Ca was more significant. Nano-Ca is more easily absorbed by nectarine leaves and fruits, which improves the calmodulin activity of leaves, peel and flesh, and up-regulates the expression of carotenoid synthesis-related genes PpPSY, PpPDS, PpZDS, PpLCY-B, PpCHY-B and PpZEP. Nano-Ca also significantly up-regulated the expression of sucrose synthesis related genes PpSUS1 and PpSUS3 in leaves and sucrose transport related genes PpSUT2 and PpSUT4 in stem phloem, promoting the transport of more photosynthetic products to fruits, providing raw materials for carotenoid synthesis, and increasing the content of total sugars and ascorbic acid (Vc). In addition, nano-Ca can also up-regulate the expression levels of PpMYB10.1 and PpUFGT and promote total anthocyanins accumulation in peel. The results of our study will be useful for clarifying how nano-fertilizer improve the fruit quality of nectarine.
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Affiliation(s)
- Mingtao Zhu
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China; Horticulture College, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Wentao Ma
- Horticulture College, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Jiahui Deng
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China
| | - Jinxiang Liu
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China
| | - Linfeng Kang
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China
| | - Jun Yu
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China; Horticulture College, Hunan Agricultural University, Changsha, Hunan, 410128, China.
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Quiroz MP, Blanco V, Zoffoli JP, Ayala M. Study of Mineral Composition and Quality of Fruit Using Vascular Restrictions in Branches of Sweet Cherry. PLANTS (BASEL, SWITZERLAND) 2023; 12:1922. [PMID: 37653839 PMCID: PMC10223680 DOI: 10.3390/plants12101922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/17/2023] [Accepted: 01/31/2023] [Indexed: 09/02/2023]
Abstract
Calcium (Ca) and carbohydrate (CHO) supply in sweet cherry have been associated with fruit quality at harvest and during storage. There is little published information integrating CHO and Ca availability and distribution in sweet cherry and their effects on fruit quality. Accordingly, in the 2019-20 season, vascular restrictions were imposed on the phloem (girdling, G, stopping phloem flow) and xylem (transverse incision, S, cutting 50% of xylem cross-section area) of individual vertical branches of the sweet cherry combination 'Lapins'/Colt trained as Kym Green Bush system to modify mineral and CHO composition in fruit and associate such changes with quality at harvest and storage. The girdling to the phloem was used to induce changes in CHO distribution. The transverse incision to the xylem was a tool to modify Ca distribution. Five treatments (TR) were implemented: TR1-CTL = Control (without vascular restriction), TR2-G, at its base, TR3-G + G: at its base, and G further up at the change of year between the second and the third years of growth TR4--S and TR5-S + G. The vegetative (i.e., shoot and leaf growth), reproductive (i.e., fruit set and yield) development and stomatal conductance were monitored. Each branch was divided into the upper (1-and 2-year-old wood) and the lower (3-and 4-year-old wood) segments of the restriction applied. The quality and mineral composition (Ca, Mg, K, and N) of fruit borne on each segment were measured at harvest. The upper segment of TR3-G + G branches were harvested 10 d before the lower segment. The fruit from the upper segment of TR3-G + G was the largest, the sweetest, and had the higher titratable acidity concentration. However, fruits of this segment were the softest, had the lowest Ca concentrations, and had the highest ratios of N:Ca and K:Ca, compared with the other TRs. TR3-G + G branches developed the highest number of lateral current season shoots including shoots below the second girdling in the lower segment of the branch. This vegetative flow of growth would explain the mineral unbalance produced in the fruit from the upper segment of the branch. TR2-G did not register changes in fruit quality and mineral concentration compared with TR1-CTL. Surprisingly, the fruit from the branches with xylem restriction did not show changes in Ca concentration, suggesting that the xylem stream was enough to supply the fruit in branches without lateral shoot development. Fruit firmness was positively related to fruit Ca concentration and negatively related to the ratios of K:Ca and N:Ca.
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Affiliation(s)
- María Paz Quiroz
- Departmatento de Fruticultura y Enología, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago P.O. Box 78204360, Chile
| | - Víctor Blanco
- Department of Horticulture, Tree Fruit Research and Extension Center, Washington State University, Wenatchee, WA 98801, USA
| | - Juan Pablo Zoffoli
- Departmatento de Fruticultura y Enología, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago P.O. Box 78204360, Chile
| | - Marlene Ayala
- Departmatento de Fruticultura y Enología, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago P.O. Box 78204360, Chile
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Ghorbanzadeh Z, Hamid R, Jacob F, Zeinalabedini M, Salekdeh GH, Ghaffari MR. Comparative metabolomics of root-tips reveals distinct metabolic pathways conferring drought tolerance in contrasting genotypes of rice. BMC Genomics 2023; 24:152. [PMID: 36973662 PMCID: PMC10044761 DOI: 10.1186/s12864-023-09246-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 03/14/2023] [Indexed: 03/29/2023] Open
Abstract
Abstract
Background
The mechanisms underlying rice root responses to drought during the early developmental stages are yet unknown.
Results
This study aimed to determine metabolic differences in IR64, a shallow-rooting, drought-susceptible genotype, and Azucena, a drought-tolerant and deep-rooting genotype under drought stress. The morphological evaluation revealed that Azucena might evade water stress by increasing the lateral root system growth, the root surface area, and length to access water. At the same time, IR64 may rely mainly on cell wall thickening to tolerate stress. Furthermore, significant differences were observed in 49 metabolites in IR64 and 80 metabolites in Azucena, for which most metabolites were implicated in secondary metabolism, amino acid metabolism, nucleotide acid metabolism and sugar and sugar alcohol metabolism. Among these metabolites, a significant positive correlation was found between allantoin, galactaric acid, gluconic acid, glucose, and drought tolerance. These metabolites may serve as markers of drought tolerance in genotype screening programs. Based on corresponding biological pathways analysis of the differentially abundant metabolites (DAMs), biosynthesis of alkaloid-derivatives of the shikimate pathway, fatty acid biosynthesis, purine metabolism, TCA cycle and amino acid biosynthesis were the most statistically enriched biological pathway in Azucena in drought response. However, in IR64, the differentially abundant metabolites of starch and sucrose metabolism were the most statistically enriched biological pathways.
Conclusion
Metabolic marker candidates for drought tolerance were identified in both genotypes. Thus, these markers that were experimentally determined in distinct metabolic pathways can be used for the development or selection of drought-tolerant rice genotypes.
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Zhu M, Yu J, Wang R, Zeng Y, Kang L, Chen Z. Nano-calcium alleviates the cracking of nectarine fruit and improves fruit quality. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 196:370-380. [PMID: 36746008 DOI: 10.1016/j.plaphy.2023.01.058] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/13/2023] [Accepted: 01/29/2023] [Indexed: 06/18/2023]
Abstract
To explore the use of L-aspartic acid nano-calcium (nano-Ca) to reduce nectarine fruit-cracking, we sprayed the crack-susceptible nectarine cultivar 'Huaguang' [Prunus persica (L.) Batsch var. nectarina (Ait.) Maxim.] with nano-Ca. The results showed that nano-Ca could reduce the fruit-cracking percentage of nectarine by more than 20%. Nano-Ca was effective because it increased the calcium pectinate content of the peel, reduced the activity of cell-wall metabolic enzymes, and changed the peel structure and enhanced its toughness. We also found that nano-Ca enhanced calmodulin activity in leaves, upregulated key genes of sucrose synthesis in leaves and sucrose transport in stem phloem, and significantly increased the soluble sugar content in the fruit by more than 2%. In addition, Nano-Ca also enhanced calmodulin activity in peel and up-regulated key genes related to anthocyanin-synthesis, promoting anthocyanin accumulation in the peel. The result will lay a theoretical foundation for the physiological and molecular mechanisms of nectarine-cracking and its prevention.
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Affiliation(s)
- Mingtao Zhu
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China; Horticulture College, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Jun Yu
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China; Horticulture College, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Rong Wang
- Horticulture College, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Yongxian Zeng
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China
| | - Linfeng Kang
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China
| | - Zhiyin Chen
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, 417000, China; Horticulture College, Hunan Agricultural University, Changsha, Hunan, 410128, China.
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Huai B, Wu Y, Liang C, Tu P, Mei T, Guan A, Yao Q, Li J, Chen J. Effects of calcium on cell wall metabolism enzymes and expression of related genes associated with peel creasing in Citrus fruits. PeerJ 2022; 10:e14574. [PMID: 36570013 PMCID: PMC9784343 DOI: 10.7717/peerj.14574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 11/28/2022] [Indexed: 12/24/2022] Open
Abstract
Fruit peel creasing is a serious pre-harvest physiological disorder in citrus, influencing fruit quality, storage, and yield. Four- and eight-year-old 'Hongjiang' oranges grafted onto Canton lemon rootstocks were treated with calcium and calcium inhibitors, respectively, to study the effects of different treatments on fruit creasing rate, mechanical properties of the peel, cell wall metabolism enzyme activities, and the expression of related genes. Foliar application of 0.5% calcium nitrate significantly reduced the fruit creasing rate, while treatment with EGTA and LaCl3, inhibitors of calcium uptake, increased the fruit creasing rate; But the effect of calcium nitrate treatment on changing the mechanical properties of pericarp and inhibiting the activity of hydrolase (PG, Cx and PE) was not very significant. Furthermore, it was observed that the expression levels of genes (PG, Cx, and PE) encoding cell wall-degrading enzymes were significantly lower in the normal fruit peel than in the creased fruit peel. Meanwhile, the expression levels of PG, Cx, and PE were higher in the peel of shaded fruit than in the peel of exposed fruit. During the high incidence period of fruit creasing, calcium nitrate treatment down-regulated the expression of PG, Cx, and PE, while EGTA treatment up-regulated the expression of these genes. In conclusion, foliar spraying of calcium nitrate at the fruit rapid enlargement stage can increase the Ca content in the peel of 'Hongjiang' orange and significantly suppress the expression of cell wall degrading enzymes genes (PG, PE and Cx) in 'Hongjiang' orange peel during the high occurrence period of fruit creasing, resulting in reducing the occurrence of fruit creasing and cracking.
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Affiliation(s)
- Bin Huai
- South China Agricultural University, Guangzhou, China
| | - Yunli Wu
- South China Agricultural University, Guangzhou, China
| | - Chunhui Liang
- Guangdong Agriculture Industry Business Polytechnic College, Guangzhou, China
| | - Panfeng Tu
- Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Tingting Mei
- South China Agricultural University, Guangzhou, China
| | - Anquan Guan
- Lianjiang Fruit Development Center, Lianjiang, China
| | - Qing Yao
- South China Agricultural University, Guangzhou, China
| | - Juan Li
- Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Jiezhong Chen
- South China Agricultural University, Guangzhou, China
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Michailidis M, Titeli VS, Karagiannis E, Feidaki K, Ganopoulos I, Tanou G, Argiriou A, Molassiotis A. Tissue-specific transcriptional analysis outlines calcium-induced core metabolic changes in sweet cherry fruit. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 189:139-152. [PMID: 36087439 DOI: 10.1016/j.plaphy.2022.08.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 08/15/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
The role of calcium in fruit ripening has been established, however knowledge regarding the molecular analysis at fruit tissue-level is still lacking. To address this, we examined the impact of foliar-applied calcium (0.5% CaCl2) in the ripening metabolism in skin and flesh tissues of the sweet cherry 'Tragana Edessis' fruit at the harvest stage. Exogenously applied calcium increased endogenous calcium level in flesh tissue and reduced fruit respiration rate and cracking traits. Fruit metabolomic along with transcriptomic analysis unraveled common and tissue-specific metabolic pathways associated with calcium feeding. Treatment with calcium diminished several alcohols (arabitol, sorbitol), sugars (fructose, maltose), acids (glyceric acid, threonic acid) and increased ribose and proline in both fruit tissues. Moreover, numerous primary metabolites, such as proline and galacturonic acid, were differentially accumulated in calcium-exposed tissues. Calcium-affected genes that involved in ubiquitin/ubl conjugation and cell wall biogenesis/degradation were differentially expressed between skin and flesh samples. Notably, skin and flesh tissues shared common calcium-responsive genes and exhibited substantial similarity in their expression patterns. In both tissues, calcium activated gene expression, most strongly those involved in plant-pathogen interaction, plant hormone signaling and MAPK signaling pathway, thus affecting related metabolic processes. By contrast, calcium depressed the expression of genes related to TCA cycle, oxidative phosphorylation, and starch/sucrose metabolism in both tissues. This work established both calcium-driven common and specialized metabolic suites in skin and flesh cherry tissues, demonstrating the utility of this approach to characterize fundamental aspects of calcium in fruit physiology.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thessaloniki, Thermi, 57001, Greece
| | - Vaia Styliani Titeli
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thessaloniki, Thermi, 57001, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thessaloniki, Thermi, 57001, Greece
| | - Kyriaki Feidaki
- Center for Research and Technology Hellas, Institute of Applied Biosciences, P.O. Box 60361, Thessaloniki, GR, 57001, Greece
| | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, Thessaloniki, Thermi, 57001, Greece; Joint Laboratory of Horticulture, ELGO-DEMETER, Thessaloniki, Thermi, 57001, Greece
| | - Georgia Tanou
- Joint Laboratory of Horticulture, ELGO-DEMETER, Thessaloniki, Thermi, 57001, Greece; Institute of Soil and Water Resources, ELGO-DEMETER, Thessaloniki, Thermi, 57001, Greece
| | - Anagnostis Argiriou
- Center for Research and Technology Hellas, Institute of Applied Biosciences, P.O. Box 60361, Thessaloniki, GR, 57001, Greece
| | - Athanassios Molassiotis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thessaloniki, Thermi, 57001, Greece.
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Shi H, Zhou X, Qin M, Wang W, He X, Zhou W. Effect of CaCl 2 Sprays in Different Fruit Development Stages on Grape Berry Cracking. FRONTIERS IN PLANT SCIENCE 2022; 13:870959. [PMID: 35769303 PMCID: PMC9234641 DOI: 10.3389/fpls.2022.870959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
Grape cracking is a common phenomenon that can reach more than 50% in some varieties and can cause enormous economic losses. "Li Xiu" grapes in different developmental stages were treated with calcium chloride (5 g/L), and the cracking rate and related biochemical and genetic indices were measured in the fruit ripening stage. The results showed that calcium treatment during the flowering period could significantly reduce grape cracking. Based on the experimental results, there are several reasons as follows: first, calcium spraying during the flowering period was more favorable to calcium absorption in grapes, and the increased calcium content in the peels helped to improve the mechanical properties of the peels, thus increasing crack resistance; second, calcium treatment reduced the expression levels of genes related to glucose metabolism, which in turn reduced PG and cellulase activities, delaying the degradation of pectin and cellulose and resulting in more structural integrity of the peels; third, calcium treatment increased fruit hardness and reduced fruit ventral pressure by decreasing the expression levels of ABA-related genes and synthesis of endogenous abscisic acid (ABA), soluble sugars (SSs), and total soluble solids (TSSs).
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Affiliation(s)
- Hao Shi
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
| | - Xiangyu Zhou
- School of Food Science and Nutrition, University of Leeds, Leeds, United Kingdom
| | - Mengling Qin
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
| | - Wenlong Wang
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
| | - Xiaoe He
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
| | - Wenhua Zhou
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
- College of Agriculture and Forestry Science, Hunan Applied Technology University, Changde, China
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Polychroniadou C, Karagiannis E, Michailidis M, Adamakis IDS, Ganopoulos I, Tanou G, Bazakos C, Molassiotis A. Identification of genes and metabolic pathways involved in wounding-induced kiwifruit ripening. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 179:179-190. [PMID: 35358868 DOI: 10.1016/j.plaphy.2022.03.027] [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: 12/27/2021] [Revised: 03/17/2022] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
Fruit is constantly challenged by wounding events, inducing accelerated ripening and irreversible metabolic changes. However, cognate mechanisms that regulate this process are little known. To expand our knowledge of ripening metabolism induced by wounding, an artificial-wound global transcriptome investigation combined with metabolite profiling study was conducted in postharvest kiwifruit (Actinidia chinensis var. deliciosa (A. Chev.) A. Chev. 'Hayward'). Wounding treatment promoted fruit ripening, as demonstrated by changes in fruit firmness, ethylene production and respiration activity determined periodically during a ripening period of 8 d at room temperature. Calcium imaging using fluorescent probe Fluo-3 AM revealed spatial dynamics of Ca2+ signaling in the wounding area following 8d ripening. Several sugars including fructose, glucose, and sucrose as well as organic acids such as citric, succinic and galacturonic acid were increased by wounding. Changes of various amino acids in wounded-treated fruit, especially 5-oxoproline and valine along with alternations of soluble alcohols, like myo-inositol were detected. Gene expression analysis of the wounded fruit showed increased expression of genes that are mainly involved in defense response (e.g., AdTLP.1-3, AdPP2C.1-2, AdMALD1), calcium ion binding (e.g., AdCbEFh, AdCLR, AdANX), TCA cycle (e.g., AdMDH.1, AdMDH.2, AdCS), sugars (e.g., AdSUSA.1, AdSPS4, AdABFr), secondary metabolism (e.g., AdPAL.1-3, AdCCR, AdHCT.1-2), lipid processing (e.g., AdGELP.1-4, AdGELP) and pectin degradation (e.g., AdPE.1-2, AdPAE.1-2, AdPG.1-2) as well as in ethylene (AdERF7, AdERF1B, AdACO.1-4) and auxin (AdICE, AdAEFc, AdASII) synthesis and perception. Moreover, genes related to aquaporins, such as AdAQP2, AdAQP4 and AdAQP7 were down-regulated in fruit exposed to wounding. These results demonstrate multiple metabolic points of wounding regulatory control during kiwifruit ripening and provide insights into the molecular basis of wounding-mediated ripening.
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Affiliation(s)
- Chrysanthi Polychroniadou
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thessaloniki-Thermi, 57001, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thessaloniki-Thermi, 57001, Greece
| | - Michail Michailidis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thessaloniki-Thermi, 57001, Greece
| | | | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, ELGO-DIMITRA, Thessaloniki-Thermi, 57001, Greece; Joint Laboratory of Horticulture, ELGO-DIMITRA, Thessaloniki-Thermi, 57001, Greece
| | - Georgia Tanou
- Joint Laboratory of Horticulture, ELGO-DIMITRA, Thessaloniki-Thermi, 57001, Greece; Institute of Soil and Water Resources, ELGO-DIMITRA, Thessaloniki-Thermi, 57001, Greece
| | - Christos Bazakos
- Institute of Plant Breeding and Genetic Resources, ELGO-DIMITRA, Thessaloniki-Thermi, 57001, Greece; Joint Laboratory of Horticulture, ELGO-DIMITRA, Thessaloniki-Thermi, 57001, Greece; Department of Comparative Development and Genetics, Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829, Cologne, Germany
| | - Athanassios Molassiotis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, Thessaloniki-Thermi, 57001, Greece.
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10
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Erbaş D, Koyuncu MA. The Effect of Pre- and Postharvest Calcium Gluconate Treatments on Physicochemical Characteristics and Bioactive Compounds of Sweet Cherry during Cold Storage. FOOD SCI TECHNOL INT 2022; 29:299-309. [PMID: 35102759 DOI: 10.1177/10820132221077515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effects of pre- and postharvest calcium gluconate (Ca-Glu) treatments on some physicochemical characteristics and bioactive compounds of sweet cherry cv. Sweetheart during cold storage were investigated. For preharvest treatments, the Ca-Glu (1%) solution was applied to the cherry trees two times at 21 and 35 days after full bloom stage. Control trees were sprayed with distilled water at the same days. Sweet cherries, sprayed with and without Ca-Glu, were dipped into cold water (4°C) containing calcium gluconate (1%) for 30 s and only in cold water (4°C) as control, after harvest Following each treatment, cherries were placed in plastic boxes and stored at 1 ± 0.5 °C and 90 ± 5% relative humidity for 3 weeks. The weight losses of cherries increased over time but calcium (Ca) treatments, especially pre-and postharvest combination, limited these increases compared to control groups. The best result for suppressing the respiration rate of cherries was also obtained from combined treatment. Moreover, combined treatment delayed the losses of titratable acidity, fruit firmness, decay rate and sensory quality in sweet cherries during storage comparison with the pre or postharvest application of Ca-Glu alone. The effect of Ca-Clu treatments on stem chlorophyll content and antioxidant activity was not significant. Preharvest and combined treatments retarded the loss of ascorbic acid content of cherries compared to postharvest and control treatments. The total phenolic and anthocyanin content increased regularly throughout storage, regardless of treatment; however, Ca treatments delayed the accumulation of these compounds. As a result, the combined Ca-Glu treatment could be a promising method for maintaining some physicochemical characteristics and bioactive compounds in sweet cherries during cold storage.
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Affiliation(s)
- Derya Erbaş
- Department of Horticulture, Faculty of Agriculture, 565593Isparta University of Applied Sciences, Isparta, Turkey
| | - Mehmet Ali Koyuncu
- Department of Horticulture, Faculty of Agriculture, 565593Isparta University of Applied Sciences, Isparta, Turkey
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11
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Skodra C, Michailidis M, Dasenaki M, Ganopoulos I, Thomaidis NS, Tanou G, Molassiotis A. Unraveling salt-responsive tissue-specific metabolic pathways in olive tree. PHYSIOLOGIA PLANTARUM 2021; 173:1643-1656. [PMID: 34537965 DOI: 10.1111/ppl.13565] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 09/06/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Salinity is a serious constraint that reduces olive crop productivity. Here, we defined metabolite and gene expression changes in various tissues of olive trees (cv. "Chondrolia Chalkidikis") exposed to 75 mM NaCl for 45 days. Results showed that salinity induced foliar symptoms and impaired growth and photosynthetic parameters. The content of Na+ and Cl- in roots, xylem, phloem and leaves increased, although the Na+ levels in old leaves and Cl- in young leaves remained unaffected. Mannitol was accumulated in roots and old leaves challenged by salinity. NaCl-treated trees have a decreased TCA-associated metabolites, such as citric and malic acid, as well as changes in phenylpropanoid-associated metabolites (i.e., pinoresinol and vanillic acid) and genes (OePLRTp2 and OeCA4H). Salt treatment resulted in hydroxyl-decarboxylmethyl eleuropein aglycone accumulation and OeGTF up-regulation in new leaves, possibly suggesting that oleuropein metabolism was modified by NaCl. Tyrosine metabolism, particularly verbascoside levels and OePPO and OehisC expressions, was modulated by salinity. Both genes (e.g., OeAtF3H and OeFNSII) and metabolites (e.g., apigenin and luteolin) involved in flavonoid biosynthesis were induced in old leaves exposed to NaCl. Based on these data, we constructed an interaction scheme of changes in metabolites and transcripts across olive tissues upon salinity. Particularly, several metabolites involved in carbohydrate metabolism were reduced in roots, while many sugars, carbohydrates and flavonoids were increased in leaves. This study provided a framework for better understanding the possible mechanisms that govern the tissue-specific response of olive tree to salinity stress, with insights into molecules that can be used for olive crop improvement projects.
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Affiliation(s)
- Christina Skodra
- Department of Horticulture, Laboratory of Pomology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Michail Michailidis
- Department of Horticulture, Laboratory of Pomology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Marilena Dasenaki
- Department of Chemistry, Laboratory of Analytical Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, Thessaloniki, Greece
- Joint Laboratory of Horticulture, ELGO-DEMETER, Thessaloniki, Greece
| | - Nikolaos S Thomaidis
- Department of Chemistry, Laboratory of Analytical Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Georgia Tanou
- Joint Laboratory of Horticulture, ELGO-DEMETER, Thessaloniki, Greece
- Institute of Soil and Water Resources, ELGO-DEMETER, Thessaloniki, Greece
| | - Athanassios Molassiotis
- Department of Horticulture, Laboratory of Pomology, Aristotle University of Thessaloniki, Thessaloniki, Greece
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12
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Chen P, Yang J, Mei Q, Liu H, Cheng Y, Ma F, Mao K. Genome-Wide Analysis of the Apple CBL Family Reveals That Mdcbl10.1 Functions Positively in Modulating Apple Salt Tolerance. Int J Mol Sci 2021; 22:ijms222212430. [PMID: 34830311 PMCID: PMC8624107 DOI: 10.3390/ijms222212430] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 11/16/2021] [Accepted: 11/16/2021] [Indexed: 11/16/2022] Open
Abstract
Abiotic stresses are increasingly harmful to crop yield and quality. Calcium and its signaling pathway play an important role in modulating plant stress tolerance. As specific Ca2+ sensors, calcineurin B-like (CBL) proteins play vital roles in plant stress response and calcium signaling. The CBL family has been identified in many plant species; however, the characterization of the CBL family and the functional study of apple MdCBL proteins in salt response have yet to be conducted in apple. In this study, 11 MdCBL genes were identified from the apple genome. The coding sequences of these MdCBL genes were cloned, and the gene structure and conserved motifs were analyzed in detail. The phylogenetic analysis indicated that these MdCBL proteins could be divided into four groups. The functional identification in Na+-sensitive yeast mutant showed that the overexpression of seven MdCBL genes could confer enhanced salt stress resistance in transgenic yeast. The function of MdCBL10.1 in regulating salt tolerance was also verified in cisgenic apple calli and apple plants. These results provided valuable insights for future research examining the function and mechanism of CBL proteins in regulating apple salt tolerance.
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Affiliation(s)
| | | | | | | | | | | | - Ke Mao
- Correspondence: (F.M.); (K.M.)
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13
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Tao X, Liu M, Yuan Y, Liu R, Qi K, Xie Z, Bao J, Zhang S, Shiratake K, Tao S. Transcriptome provides potential insights into how calcium affects the formation of stone cell in Pyrus. BMC Genomics 2021; 22:831. [PMID: 34789145 PMCID: PMC8600858 DOI: 10.1186/s12864-021-08161-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 10/22/2021] [Indexed: 11/17/2022] Open
Abstract
Background The content of stone cells in pears has a great influence on taste. Stone cells are formed by the accumulation of lignin. The treatment of exogenous calcium can affect the lignin synthesis, but this Ca-mediated mechanism is still unclear. In this study, the author performed a comparative transcriptomic analysis of callus of pears (Pyrus x bretschneideri) treated with calcium nitrate Ca (NO3)2 to investigate the role of calcium in lignin synthesis. Results There were 2889 differentially expressed genes (DEGs) detected between the Control and Ca (NO3)2 treatment in total. Among these 2889 DEGs, not only a large number of genes related to Ca single were found, but also many genes were enriched in secondary metabolic pathway, especially in lignin synthesis. Most of them were up-regulated during the development of callus after Ca (NO3)2 treatment. In order to further explore how calcium nitrate treatment affects lignin synthesis, the author screened genes associated with transduction of calcium signal in DEGs, and finally found CAM, CML, CDPK, CBL and CIPK. Then the author identified the PbCML3 in pears and conducted relevant experiments finding the overexpression of PbCML3 would increase the content of pear stone cells, providing potential insights into how Ca treatment enhances the stone cell in pears. Conclusions Our deep analysis reveals the effects of exogenous calcium on calcium signal and lignin biosynthesis pathway. The function of PbCML3 on stone cells formation was verified in pear. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-08161-5.
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Affiliation(s)
- Xingyu Tao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Min Liu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yazhou Yuan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ruonan Liu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Kaijie Qi
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhihua Xie
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jianping Bao
- College of Plant Science, Tarim University, Ala'er, China
| | - Shaoling Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | | | - Shutian Tao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China.
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14
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Preharvest Foliar Spray of Calcium Chloride on Growth, Yield, Quality, and Shelf Life Extension of Different Lowland Tomato Varieties in Malaysia. HORTICULTURAE 2021. [DOI: 10.3390/horticulturae7110466] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Tomato is a popularly consumed vegetable fruit and suffers from huge losses due to its high perishability. Calcium chloride (CaCl2∙2H2O) application has been shown to be an important method that can extend the shelf life of tomato fruits. The current study aimed to determine the effect of pre-harvest treatments of CaCl2 on the growth, yield, quality, and shelf-life performance of tomato varieties. Four tomato varieties known as MT-1, MT-3, 303, and 105 were sprayed with the CaCl2 solutions (0.0%, 1.0%, 1.5%, and 2.0%, w/v) after seven days of fruit initiation and were sprayed every week until the first harvest. Spraying with 2% of CaCl2 showed an improvement in controlling physiological disorders such as blossom end rot (BER), weight loss, declined disease incidence, and disease severity. An increase in fruit quality was also observed as the treated fruit could maintain its shelf life up to 20 days at ambient conditions. At the highest doses of CaCl2 (2%), it increased the total ascorbic acid (AA), lycopene content, total phenolic content (TPC), and antioxidant activity (DPPH) in comparison to lower doses and control tomatoes. MT-3 responded well to higher doses of CaCl2 (2%) among the four tomato varieties and performed better in growth, yield, disease, insect infestation, quality, and shelf-life performance compared to the other varieties and CaCl2 treatment combination.
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15
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Genotype- and tissue-specific metabolic networks and hub genes involved in water-induced distinct sweet cherry fruit cracking phenotypes. Comput Struct Biotechnol J 2021; 19:5406-5420. [PMID: 34667535 PMCID: PMC8501671 DOI: 10.1016/j.csbj.2021.09.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/23/2021] [Accepted: 09/26/2021] [Indexed: 12/13/2022] Open
Abstract
Sweet cherry fruit cracking is a complex physiological disorder that causes significant economic losses. Despite many years of research there is a lack of understanding of the mechanisms involved in cracking. Here, skin and flesh tissue from the cracking susceptible 'Early Bigi’ and the cracking tolerant ‘Regina’ cultivars were sampled prior and just after water dipping treatment to identify water-affected metabolic networks that putatively involved in fruit cracking. Primary metabolites, most strongly those involved in sugars and amino acid metabolism, such as glucose and asparagine, shifted in 'Early Bigi’ compared with ‘Regina’ tissues following water exposure. Comparisons between cultivars, tissues and dipping points identified significant differentially expressed genes. Particularly, genes related to abscisic acid, ethylene biosynthesis, pectin metabolism, expansins and aquaporins were altered in water-exposed tissues. To further characterize the role of these genes in cracking, their single nucleotide variants of the coding regions was studied in another eight sweet cherry cultivars, which differ in their sensitivity to cracking, revealing a strong link mainly between pectin metabolism-related genes and cracking-phenotypes. Integrated metabolomic and transcriptomic profiling uncovered genotypic- and tissue-specific metabolic pathways, including tricarboxylic acid cycle, cell enlargement, lipid and ethanol biosynthesis, and plant defense that putatively are involved in fruit cracking. Based on these results, a model which describes the skin and flesh metabolic reprogramming during water-induced fruit cracking in the susceptible 'Early Bigi’ cultivar is presented. Τhis study can help to explore novel candidate genes and metabolic pathways for cracking tolerance in sweet cherry.
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16
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Karagiannis E, Michailidis M, Skodra C, Molassiotis A, Tanou G. Silicon influenced ripening metabolism and improved fruit quality traits in apples. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 166:270-277. [PMID: 34130037 DOI: 10.1016/j.plaphy.2021.05.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/25/2021] [Indexed: 06/12/2023]
Abstract
The benefits of silicon against abiotic stress in different annual plant species have been described in many studies, however the regulation of ripening of fruit tree crops by silicon remains largely uncharacterized. Therefore, the present study aimed to explore the impact of foliar silicon application in the apple (cv. 'Fuji') fruit ripening traits along with the effect of silicon in the nutrient and metabolic changes in the fully expanded leaves, annual shoots, fruit outer pericarp (peel) and fruit mesocarp (skin) tissues. Data indicated that fruit firmness and apple peel color attributes, such as redness (a*) and percentage of red-blushed surface were induced by silicon application. Moreover, several fruit ripening traits, such as titratable acidity, soluble solid content and respiration rate were unaffected by silicon. Endogenous silicon level in leaves shoots and peel tissues were increased by exogenously applied silicon while several elements (i.e., P, Mg, Mn, Fe and Cu) were altered in the tested tissues that exposed to silicon. In addition, silicon increased the accumulation of total phenolic and total anthocyanin compounds in the various apple tissues. The level of various primary metabolites including sorbitol, fructose, maltose cellobiose, malic acid, phosphoric acid and gluconic acid was also notably affected by silicon in a tissue-specific manner. Overall, this study provides a valuable resource for future research, aiming in the elucidation of the role of silicon in fruit tree physiology.
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Affiliation(s)
- Evangelos Karagiannis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, 57001, Thessaloniki, Greece.
| | - Michail Michailidis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, 57001, Thessaloniki, Greece.
| | - Christina Skodra
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, 57001, Thessaloniki, Greece.
| | - Athanassios Molassiotis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, 57001, Thessaloniki, Greece.
| | - Georgia Tanou
- Institute of Soil and Water Resources, ELGO-DEMETER, Thessaloniki, 57001, Greece.
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17
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Li X, Sun S, Guo S, Hu X. Identifying the Phytotoxicity and Defense Mechanisms Associated with Graphene-Based Nanomaterials by Integrating Multiomics and Regular Analysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:9938-9948. [PMID: 34232619 DOI: 10.1021/acs.est.0c08493] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The application of graphene-based nanomaterials (GBNs) has attracted global attention in various fields, and understanding defense mechanisms against the phytotoxicity of GBNs is crucial for assessing their environmental risks and safe-by-design. However, the related information is lacking, especially for edible vegetable crops. In the present study, GBNs (0.25, 2.5, and 25 mg/kg plant fresh weight) were injected into the stems of pepper plants. The results showed that the plant defense was regulated by reducing the calcium content by 21.7-48.3%, intercellular CO2 concentration by 12.0-35.2%, transpiration rate by 8.7-40.2%, and stomatal conductance by 16.9-50.5%. The defense pathways of plants in response to stress were further verified by the downregulation of endocytosis and transmembrane transport proteins, leading to a decrease in the nanomaterial uptake. The phytohormone gibberellin and abscisic acid receptor PYL8 were upregulated, indicating the activation of defense systems. However, reduced graphene oxide and graphene oxide quantum dots trigger stronger oxidative stress (e.g., H2O2 and malondialdehyde) than graphene oxide in fruits due to the breakdown of antioxidant defense systems (e.g., cytochrome P450 86A22 and P450 77A1). Both nontargeted proteomics and metabolomics consistently demonstrated that the downregulation of carbohydrate and upregulation of amino acid metabolism were the main mechanisms underlying the phytotoxicity and defense mechanisms, respectively.
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Affiliation(s)
- Xiaokang Li
- School of Environmental and Material Engineering, Yantai University, Yantai 264005, China
| | - Shan Sun
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Shuqing Guo
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Xiangang Hu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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18
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Michailidis M, Tanou G, Sarrou E, Karagiannis E, Ganopoulos I, Martens S, Molassiotis A. Pre- and Post-harvest Melatonin Application Boosted Phenolic Compounds Accumulation and Altered Respiratory Characters in Sweet Cherry Fruit. Front Nutr 2021; 8:695061. [PMID: 34179064 PMCID: PMC8219925 DOI: 10.3389/fnut.2021.695061] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 05/18/2021] [Indexed: 12/15/2022] Open
Abstract
The aim of the present study was to investigate the impact of exogenous melatonin (0. 5 mM) application through pre-harvest foliar spray and postharvest immersion, alone or in combination, on ripening parameters of sweet cherry (cv. Ferrovia) fruit and their relationship with bioactive compounds and gene expression at harvest as well after cold storage (0°C) for 12 days and subsequent room temperature (20°C) exposure for 8 h. Although several ripening traits were not influenced by melatonin, the combining pre- and post-harvest treatments delayed fruit softening at post-cold period. Preharvest spray with melatonin depressed fruit respiration at time of harvest while all applied treatments induced respiratory activity following cold, indicating that this anti-ripening action of melatonin is reversed by cold. Several genes related to the tricarboxylic acid cycle, such as PaFUM, PaOGDH, PaIDH, and PaPDHA1 were upregulated in fruit exposed to melatonin, particularly following combined pre- and post-harvest application. The accumulation of phenolic compounds, such as neochlorogenic acid, chlorogenic acid, epicatechin, procyanidin B1, procyanidin B2+B4, cyanidin-3-O-galactoside, and cyanidin-3-O-rutinoside along with the expression of several genes involved in phenols biosynthesis, such as PaSK, PaPAL, Pa4CL, PaC4H, and PaFNR were at higher levels in melatonin-treated cherries at harvest and after cold exposure, the highest effects being observed in fruits subjected to both pre- and post-harvest treatments. This study provides a comprehensive understanding of melatonin-responsive ripening framework at different melatonin application conditions and sweet cherry stages, thereby helps to understand the action of this molecule in fruit physiology.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgia Tanou
- Institute of Soil and Water Resources, Hellenic Agricultural Organisation (HAO-DEMETER), Thessaloniki, Greece
| | - Eirini Sarrou
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organisation (HAO-DEMETER), Thessaloniki, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organisation (HAO-DEMETER), Thessaloniki, Greece
| | - Stefan Martens
- Department of Food Quality and Nutrition, Centro Ricerca e Innovazione, Fondazione Edmund Mach, Trento, Italy
| | - Athanassios Molassiotis
- Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
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19
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An Early Calcium Loading during Cherry Tree Dormancy Improves Fruit Quality Features at Harvest. HORTICULTURAE 2021. [DOI: 10.3390/horticulturae7060135] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The possible role of an early calcium application via sprays (0.25, 0.5 and 1M CaCl2) on dormant buds to improve sweet cherry (cv. Ferrovia) fruit quality at harvest was investigated. Fruit quality characteristics were also investigated in response to the age of spurs, the ripening stage, and their interactions. Results indicate that calcium enters the dormant flower buds and the phloem but not to the dormant vegetative buds. At harvest, the levels of Zn, Mn, and Cu were declined in fruits by increasing CaCl2 doses of sprays. Fruit respiratory activity was higher and on–tree fruit cracking was lower in red-colour (unripe) cherries as well as in fruit that was produced by 2-year-old short spurs or by Ca-treated buds. Differences in the sweet cherry skin metabolic profiles were identified. Fruit produced from Ca-exposed spurs exhibited lower levels of ribose and other cell-wall-related sugars and higher sucrose, maltose, and quininic acid levels. Nutrient shift was increased in red cherries, while anthocyanins were boosted in the black ones. PCA analysis was performed between the high dose of calcium spray and a control for mineral element content and cherry quality traits. This study illustrates that the high dose of calcium application during bud dormancy can effectively improve sweet cherry fruit characteristics, in terms of calcium content, cracking incidence, and fruit set. Overall, the present study contributes to a better understanding of the impact of calcium nutrition in fruit crops, which will provide references for alternative nutrient management and quality control in sweet cherry production.
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20
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Skodra C, Titeli VS, Michailidis M, Bazakos C, Ganopoulos I, Molassiotis A, Tanou G. Olive Fruit Development and Ripening: Break on through to the "-Omics" Side. Int J Mol Sci 2021; 22:ijms22115806. [PMID: 34071656 PMCID: PMC8198582 DOI: 10.3390/ijms22115806] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/27/2021] [Accepted: 05/27/2021] [Indexed: 01/11/2023] Open
Abstract
The olive tree (Olea europaea L. subsp. europaea) is the most important perennial crop in the Mediterranean region, producing table olives and oil, both appreciated for their nutraceutical value. Although olive oil quality traits have been extensively studied, much less attention has been paid to olive drupe. Olive drupe ripening is an extremely complex process involving numerous physiological and molecular changes that are unique in this fruit crop species. This review underlines the contribution of "-omics" techniques and of the recent advances in bioinformatics and analytical tools, notably next-generation sequencing and mass spectrometry, for the characterization of the olive ripening syndrome. The usage of high-dimensional datasets, such as transcriptomics, proteomics, and metabolomics, will provide a systematical description of the molecular-specific processes regulating olive fruit development and ripening. However, the incomplete sequence of the O. europaea L. reference genome has largely hampered the utilization of omics tools towards olive drupe research. Due to this disadvantage, the most reported -omics studies on fruit trees concern metabolomics and only a few transcriptomics and proteomics. In this review, up-to-date applications of -omics technologies towards olive drupe biology are addressed, and future perspectives in olive fruit research are highlighted.
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Affiliation(s)
- Christina Skodra
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, 57001 Thessaloniki-Thermi, Greece; (C.S.); (V.S.T.); (M.M.); (A.M.)
| | - Vaia Styliani Titeli
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, 57001 Thessaloniki-Thermi, Greece; (C.S.); (V.S.T.); (M.M.); (A.M.)
| | - Michail Michailidis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, 57001 Thessaloniki-Thermi, Greece; (C.S.); (V.S.T.); (M.M.); (A.M.)
| | - Christos Bazakos
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organization—‘Demeter’ (ELGO-Demeter), 57001 Thessaloniki-Thermi, Greece; (C.B.); (I.G.)
| | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organization—‘Demeter’ (ELGO-Demeter), 57001 Thessaloniki-Thermi, Greece; (C.B.); (I.G.)
| | - Athanassios Molassiotis
- Laboratory of Pomology, Department of Horticulture, Aristotle University of Thessaloniki, 57001 Thessaloniki-Thermi, Greece; (C.S.); (V.S.T.); (M.M.); (A.M.)
| | - Georgia Tanou
- Institute of Soil and Water Resources, Hellenic Agricultural Organization—‘Demeter’ (ELGO-Demeter), 57001 Thessaloniki-Thermi, Greece
- Correspondence:
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21
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Liu J, Deng Z, Sun H, Song J, Li D, Zhang S, Wang R. Differences in Anthocyanin Accumulation Patterns and Related Gene Expression in Two Varieties of Red Pear. PLANTS 2021; 10:plants10040626. [PMID: 33806180 PMCID: PMC8066033 DOI: 10.3390/plants10040626] [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: 03/07/2021] [Revised: 03/23/2021] [Accepted: 03/23/2021] [Indexed: 11/16/2022]
Abstract
Red pear is a popular fruit that is appreciated for its attractive and distinctive appearance and mild flavor. In this study, we investigated the mechanism underlying the red coloration of pear skin using the ‘Xinqihong’ cultivar—which was selected as a spontaneous bud sport mutant of the ‘Xinli 7′(Pyrus betulifolia Rehd.) variety and has a stronger red color that is retained in the mature fruit—as an experimental model. We compared the phenotype and gene expression patterns of the two varieties and found no significant differences at the early stage of fruit development. However, although the red color of ‘Xinli 7′ fruits began to fade 107 days after full bloom, that of ‘Xinqihong’ fruits persisted until the time of harvest. Transcriptome sequencing identified 639 genes that were differentially expressed between the two varieties, including genes related to light, calcium, and hormone signaling (e.g., PbPIF3, PbGA2ox, and the calmodulin related genes). Moreover, anthocyanin biosynthesis genes were downregulated as the red color of ‘Xinli 7′ fruits faded. These results provide insight into the molecular basis of color differences in red pears that can be useful for improving its fruit quality and commercial value.
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Affiliation(s)
- Jianlong Liu
- Lab of Pear Genetic Improvement and Germplasm Innovation, Qingdao Agricultural University, Qingdao 266109, China; (J.L.); (Z.D.); (H.S.); (J.S.); (D.L.)
| | - Zhiwei Deng
- Lab of Pear Genetic Improvement and Germplasm Innovation, Qingdao Agricultural University, Qingdao 266109, China; (J.L.); (Z.D.); (H.S.); (J.S.); (D.L.)
| | - Hongwei Sun
- Lab of Pear Genetic Improvement and Germplasm Innovation, Qingdao Agricultural University, Qingdao 266109, China; (J.L.); (Z.D.); (H.S.); (J.S.); (D.L.)
| | - Jiankun Song
- Lab of Pear Genetic Improvement and Germplasm Innovation, Qingdao Agricultural University, Qingdao 266109, China; (J.L.); (Z.D.); (H.S.); (J.S.); (D.L.)
| | - Dingli Li
- Lab of Pear Genetic Improvement and Germplasm Innovation, Qingdao Agricultural University, Qingdao 266109, China; (J.L.); (Z.D.); (H.S.); (J.S.); (D.L.)
| | - Shaoling Zhang
- Centre of Pear Engineering Technology Research, Nanjing Agricultural University, Nanjing 210095, China
- Correspondence: (S.Z.); (R.W.)
| | - Ran Wang
- Lab of Pear Genetic Improvement and Germplasm Innovation, Qingdao Agricultural University, Qingdao 266109, China; (J.L.); (Z.D.); (H.S.); (J.S.); (D.L.)
- Correspondence: (S.Z.); (R.W.)
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22
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Stavridou E, Voulgari G, Michailidis M, Kostas S, Chronopoulou EG, Labrou NE, Madesis P, Nianiou-Obeidat I. Overexpression of A Biotic Stress-Inducible Pvgstu Gene Activates Early Protective Responses in Tobacco under Combined Heat and Drought. Int J Mol Sci 2021; 22:2352. [PMID: 33652971 PMCID: PMC7956764 DOI: 10.3390/ijms22052352] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/22/2021] [Accepted: 02/24/2021] [Indexed: 12/20/2022] Open
Abstract
Drought and heat stresses are major factors limiting crop growth and productivity, and their effect is more devastating when occurring concurrently. Plant glutathione transferases (GSTs) are differentially expressed in response to different stimuli, conferring tolerance to a wide range of abiotic stresses. GSTs from drought-tolerant Phaseolus vulgaris var. "Plake Megalosperma Prespon" is expected to play an important role in the response mechanisms to combined and single heat and drought stresses. Herein, we examined wild-type N. tabacum plants (cv. Basmas Xanthi) and T1 transgenic lines overexpressing the stress-induced Pvgstu3-3 and Pvgstu2-2 genes. The overexpression of Pvgstu3-3 contributed to potential thermotolerance and greater plant performance under combined stress. Significant alterations in the primary metabolism were observed in the transgenic plants between combined stress and stress-free conditions. Stress-responsive differentially expressed genes (DEGs) and transcription factors (TFs) related to photosynthesis, signal transduction, starch and sucrose metabolism, osmotic adjustment and thermotolerance, were identified under combined stress. In contrast, induction of certain DEGs and TF families under stress-free conditions indicated that transgenic plants were in a primed state. The overexpression of the Pvgstu3-3 is playing a leading role in the production of signaling molecules, induction of specific metabolites and activation of the protective mechanisms for enhanced protection against combined abiotic stresses in tobacco.
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Affiliation(s)
- Evangelia Stavridou
- Laboratory of Genetics and Plant Breeding, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, P.O. Box 261, GR-54124 Thessaloniki, Greece; (E.S.); (G.V.)
- Institute of Applied Biosciences, CERTH, 6th km Charilaou-Thermis Road, Thermi, P.O. Box 361, GR-57001 Thessaloniki, Greece;
| | - Georgia Voulgari
- Laboratory of Genetics and Plant Breeding, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, P.O. Box 261, GR-54124 Thessaloniki, Greece; (E.S.); (G.V.)
| | - Michail Michailidis
- Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece;
| | - Stefanos Kostas
- Laboratory of Floriculture, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece;
| | - Evangelia G. Chronopoulou
- Laboratory of Enzyme Technology, Department of Biotechnology, School of Food, Biotechnology and Development, Agricultural University of Athens, 75 Iera Odos Street, 11855 Athens, Greece; (E.G.C.); (N.E.L.)
| | - Nikolaos E. Labrou
- Laboratory of Enzyme Technology, Department of Biotechnology, School of Food, Biotechnology and Development, Agricultural University of Athens, 75 Iera Odos Street, 11855 Athens, Greece; (E.G.C.); (N.E.L.)
| | - Panagiotis Madesis
- Institute of Applied Biosciences, CERTH, 6th km Charilaou-Thermis Road, Thermi, P.O. Box 361, GR-57001 Thessaloniki, Greece;
- Laboratory of Molecular Biology of Plants, School of Agricultural Sciences, University of Thessaly, 38446 Thessaly, Greece
| | - Irini Nianiou-Obeidat
- Laboratory of Genetics and Plant Breeding, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, P.O. Box 261, GR-54124 Thessaloniki, Greece; (E.S.); (G.V.)
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23
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Mao K, Yang J, Wang M, Liu H, Guo X, Zhao S, Dong Q, Ma F. Genome-wide analysis of the apple CaCA superfamily reveals that MdCAX proteins are involved in the abiotic stress response as calcium transporters. BMC PLANT BIOLOGY 2021; 21:81. [PMID: 33557757 PMCID: PMC7869505 DOI: 10.1186/s12870-021-02866-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 02/01/2021] [Indexed: 05/06/2023]
Abstract
BACKGROUND Calcium (Ca2+) plays an important role in plant growth and development, and the maintenance of calcium homeostasis is necessary for the survival of all plant species. Ca2+/H+ exchangers (CAXs) are a subgroup of the CaCA (Ca2+/cation antiporter) superfamily. In general, CAX proteins mediate cytosolic Ca2+ entry into vacuoles to prevent excessive accumulation of Ca2+ in the cytosol. The CaCA superfamily has been identified and characterised in many plant species; however, characterisation of the CaCA superfamily and functional study of apple CAX proteins have yet to be conducted in apple (Malus × domestica Borkh.). RESULTS Here, we identified 21 CaCA family proteins in apple for the first time. Phylogenetic and gene structure analysis, as well as prediction of conserved motifs, suggested that these proteins could be classified into four groups: CAX, CCX, NCL, and MHX. Expression analysis showed that the 10 MdCAX genes we cloned strongly responded to calcium and abiotic stress treatments. Collinearity analysis and characterisation of calcium transport capacity resulted in the identification of a pair of segmental duplication genes: MdCAX3L-1 and MdCAX3L-2; MdCAX3L-2 showed strong calcium transport capacity, whereas MdCAX3L-1 showed no calcium transport capacity. Yeast two-hybrid (Y2H) assays showed that these two proteins could interact with each other. The high sequence similarity (94.6%) makes them a good model for studying the crucial residues and structural basis of the calcium transport of CAX proteins. Prediction of the protein interaction network revealed several proteins that may interact with CAX proteins and play important roles in plant stress responses, such as SOS2, CXIP1, MHX, NRAMP3, and MTP8. CONCLUSIONS Our analysis indicated that MdCAX proteins have strong calcium transport capacity and are involved in the abiotic stress response in apple. These findings provide new insight and rich resources for future studies of MdCAX proteins in apple.
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Affiliation(s)
- Ke Mao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A &F University, Yangling, 712100 Shaanxi China
| | - Jie Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A &F University, Yangling, 712100 Shaanxi China
| | - Min Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A &F University, Yangling, 712100 Shaanxi China
| | - Huayu Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A &F University, Yangling, 712100 Shaanxi China
| | - Xin Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A &F University, Yangling, 712100 Shaanxi China
| | - Shuang Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A &F University, Yangling, 712100 Shaanxi China
| | - Qinglong Dong
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A &F University, Yangling, 712100 Shaanxi China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A &F University, Yangling, 712100 Shaanxi China
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24
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Michailidis M, Karagiannis E, Tanou G, Samiotaki M, Tsiolas G, Sarrou E, Stamatakis G, Ganopoulos I, Martens S, Argiriou A, Molassiotis A. Novel insights into the calcium action in cherry fruit development revealed by high-throughput mapping. PLANT MOLECULAR BIOLOGY 2020; 104:597-614. [PMID: 32909183 DOI: 10.1007/s11103-020-01063-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/27/2020] [Indexed: 05/26/2023]
Abstract
This work provides the first system-wide datasets concerning metabolic changes in calcium-treated fruits, which reveal that exogenously applied calcium may specifically reprogram sweet cherry development and ripening physiognomy. Calcium modulates a wide range of plant developmental processes; however, the regulation of fruit ripening by calcium remains largely uncharacterized. In this study, transcriptome, proteome and metabolome profiling was used to document the responses of sweet cherry fruit to external calcium application (0.5% CaCl2) at 15, 27 and 37 days after full blossom. Endogenous calcium loading in fruit across development following external calcium feeding was accompanied by a reduction in respiration rate. Calcium treatment strongly impaired water-induced fruit cracking tested by two different assays, and this effect depended on the fruit size, water temperature and light/dark conditions. Substantial changes in the levels of numerous polar/non-polar primary and secondary metabolites, including malic acid, glucose, cysteine, epicatechin and neochlorogenic acid were noticed in fruits exposed to calcium. At the onset of ripening, we identified various calcium-affected genes, including those involved in ubiquitin and cysteine signaling, that had not been associated previously with calcium function in fruit biology. Calcium specifically increased the abundance of a significant number of proteins that classified as oxidoreductases, transferases, hydrolases, lyases, and ligases. The overview of temporal changes in gene expression and corresponding protein abundance provided by interlinked analysis revealed that oxidative phosphorylation, hypersensitive response, DNA repair, stomata closure, biosynthesis of secondary metabolites, and proton-pump activity were mainly affected by calcium. This report provides the fullest characterization of expression patterns in calcium-responsive genes, proteins and metabolites currently available in fruit ripening and will serve as a blueprint for future biological endeavors.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 57001, Thermi, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 57001, Thermi, Greece
| | - Georgia Tanou
- Institute of Soil and Water Resources, ELGO-DEMETER, 57001, Thessaloniki, Greece
| | - Martina Samiotaki
- Institute of Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", 16672, Vari, Greece
| | - George Tsiolas
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thermi, 570 01, Thessaloniki, Greece
| | - Eirini Sarrou
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, 57001, Thessaloniki, Greece
| | - George Stamatakis
- Institute of Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", 16672, Vari, Greece
| | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, 57001, Thessaloniki, Greece
| | - Stefans Martens
- Department of Food Quality and Nutrition, Centro Ricerca e Innovazione, Fondazione Edmund Mach, 38010 San Michele all'Adige, Trento, Italy
| | - Anagnostis Argiriou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thermi, 570 01, Thessaloniki, Greece
| | - Athanassios Molassiotis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 57001, Thermi, Greece.
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25
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Yu J, Zhu M, Bai M, Xu Y, Fan S, Yang G. Effect of calcium on relieving berry cracking in grape ( Vitis vinifera L.) 'Xiangfei'. PeerJ 2020; 8:e9896. [PMID: 32983645 PMCID: PMC7500324 DOI: 10.7717/peerj.9896] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 08/17/2020] [Indexed: 12/15/2022] Open
Abstract
Fruit cracking is a physiological disorder in many plant species that leads to severe economic losses. The aim of this study was to investigate the effect of calcium on fruit cracking and explore the underlying mechanisms. We studied the effect of exogenous calcium on grape berry cracking, calcium absorbance and distribution, and cell wall metabolism in the cracking-susceptible cultivar ‘Xiangfei’. Calcium significantly reduced the frequency of fruit cracking, increased the break force of the berry skin, and stimulated storage of calcium. In addition, calcium increased the content of protopectin and inhibited the increase in content of water-soluble pectin, by regulating the transcription and activities of enzymes associated with cell wall metabolism. Taken together, the results indicated that dipping grape berries in calcium solution is effective in preventing fruit cracking by stimulating calcium uptake, inhibiting cell wall disassembly, and promoting cell wall strengthening.
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Affiliation(s)
- Jun Yu
- Hunan Agricultural University, Changsha, China.,Hunan University of Humanities, Science and Technology, Loudi, China.,Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding, Ministry of Education, Changsha, China
| | - Mingtao Zhu
- Hunan Agricultural University, Changsha, China.,Hunan University of Humanities, Science and Technology, Loudi, China
| | - Miao Bai
- Hunan Agricultural University, Changsha, China.,Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding, Ministry of Education, Changsha, China
| | - Yanshuai Xu
- Hunan Agricultural University, Changsha, China.,Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding, Ministry of Education, Changsha, China
| | - Shaogang Fan
- Hunan Agricultural University, Changsha, China.,Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding, Ministry of Education, Changsha, China
| | - Guoshun Yang
- Hunan Agricultural University, Changsha, China.,Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding, Ministry of Education, Changsha, China
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26
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Gao Q, Tan Q, Song Z, Chen W, Li X, Zhu X. Calcium chloride postharvest treatment delays the ripening and softening of papaya fruit. J FOOD PROCESS PRES 2020. [DOI: 10.1111/jfpp.14604] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Qiyang Gao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Engineering Research Center for Postharvest Technology of Horticultural Crops in South China Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
| | - Qinqin Tan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Engineering Research Center for Postharvest Technology of Horticultural Crops in South China Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
| | - Zunyang Song
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Engineering Research Center for Postharvest Technology of Horticultural Crops in South China Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
| | - Weixin Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Engineering Research Center for Postharvest Technology of Horticultural Crops in South China Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
| | - Xueping Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Engineering Research Center for Postharvest Technology of Horticultural Crops in South China Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
| | - Xiaoyang Zhu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
- Engineering Research Center for Postharvest Technology of Horticultural Crops in South China Ministry of Education College of Horticulture South China Agricultural University Guangzhou China
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27
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Michailidis M, Karagiannis E, Tanou G, Sarrou E, Karamanoli K, Lazaridou A, Martens S, Molassiotis A. Sweet cherry fruit cracking: follow-up testing methods and cultivar-metabolic screening. PLANT METHODS 2020; 16:51. [PMID: 32308729 PMCID: PMC7149889 DOI: 10.1186/s13007-020-00593-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 04/02/2020] [Indexed: 06/01/2023]
Abstract
BACKGROUND Rain-induced fruit cracking is a major physiological problem in most sweet cherry cultivars. For an in vivo cracking assay, the 'Christensen method' (cracking evaluation following fruit immersion in water) is commonly used; however, this test does not adequately simulate environmental conditions. Herein, we have designed and evaluated a cracking protocol, named 'Waterfall method', in which fruits are continuously wetted under controlled conditions. RESULTS The application of this method alone, or in combination with 'Christensen method, was shown to be a reliable approach to characterize sweet cherry cracking behavior. Seventeen cherry cultivars were tested for their cracking behavior using both protocols, and primary as well as secondary metabolites identification was performed in skin tissue using a combined GC-MS and UPLC-MS/MS platform. Significant variations of some of the detected metabolites were discovered and important cracking index-metabolite correlations were identified. CONCLUSIONS We have established an alternative/complementary method of cherry cracking characterization alongside to Christiansen assay.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 570 01, Thessaloniki-Thermi, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 570 01, Thessaloniki-Thermi, Greece
| | - Georgia Tanou
- Institute of Soil and Water Resources, ELGO-DEMETER, Thessaloniki, 57001 Greece
| | - Eirini Sarrou
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, Thessaloniki, 57001 Greece
| | - Katerina Karamanoli
- Laboratory of Agricultural Chemistry, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Athina Lazaridou
- Laboratory of Food Chemistry – Biochemistry, Dept. of Food Science & Technology, Faculty of Agriculture Aristotle University, Thessaloniki, Greece
| | - Stefan Martens
- Department of Food Quality and Nutrition, Centro Ricerca e Innovazione, Fondazione Edmund Mach, 38010 San Michele all’Adige, Trento, Italy
| | - Athanassios Molassiotis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 570 01, Thessaloniki-Thermi, Greece
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28
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Michailidis M, Karagiannis E, Tanou G, Samiotaki M, Sarrou E, Karamanoli K, Lazaridou A, Martens S, Molassiotis A. Proteomic and metabolic analysis reveals novel sweet cherry fruit development regulatory points influenced by girdling. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 149:233-244. [PMID: 32086160 DOI: 10.1016/j.plaphy.2020.02.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/12/2020] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
Despite the application of girdling technique for several centuries, its impact on the metabolic shifts that underly fruit biology remains fragmentary. To characterize the influence of girdling on sweet cherry (Prunus avium L.) fruit development and ripening, second-year-old shoots of the cultivars 'Lapins' and 'Skeena' were girdled before full blossom. Fruit characteristics were evaluated across six developmental stages (S), from green-small fruit (stage S1) to full ripe stage (stage S6). In both cultivars, girdling significantly altered the fruit ripening physiognomy. Time course fruit metabolomic along with proteomic approaches unraveled common and cultivar-specific responses to girdling. Notably, several primary and secondary metabolites, such as soluble sugars (glucose, trehalose), alcohol (mannitol), phenolic compounds (rutin, naringenin-7-O-glucoside), including anthocyanins (cyanidin-3-O-rutinoside, cyanidin-3-O-galactoside, cyanidin-3.5-O-diglucoside) were accumulated by girdling, while various amino acids (glycine, threonine, asparagine) were decreased in both cultivars. Proteins predominantly associated with ribosome, DNA repair and recombination, chromosome, membrane trafficking, RNA transport, oxidative phosphorylation, and redox homeostasis were depressed in fruits of both girdled cultivars. This study provides the first system-wide datasets concerning metabolomic and proteomic changes in girdled fruits, which reveal that shoot girdling may induce long-term changes in sweet cherry metabolism.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 57001, Thermi, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 57001, Thermi, Greece
| | - Georgia Tanou
- Institute of Soil and Water Resources, ELGO-DEMETER, Thessaloniki, 57001, Greece
| | - Martina Samiotaki
- Institute of Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", Vari, 16672, Greece
| | - Eirini Sarrou
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, Thessaloniki, 57001, Greece
| | - Katerina Karamanoli
- Laboratory of Agricultural Chemistry, School of Agriculture, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Athina Lazaridou
- Laboratory of Food Chemistry and Biochemistry, School of Agriculture, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Stefan Martens
- Department of Food Quality and Nutrition, Centro Ricerca e Innovazione, Fondazione Edmund Mach, 38010, San Michele all'Adige, Trento, Italy
| | - Athanassios Molassiotis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, 57001, Thermi, Greece.
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29
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Michailidis M, Karagiannis E, Tanou G, Sarrou E, Stavridou E, Ganopoulos I, Karamanoli K, Madesis P, Martens S, Molassiotis A. An integrated metabolomic and gene expression analysis identifies heat and calcium metabolic networks underlying postharvest sweet cherry fruit senescence. PLANTA 2019; 250:2009-2022. [PMID: 31531781 DOI: 10.1007/s00425-019-03272-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 09/05/2019] [Indexed: 05/22/2023]
Abstract
Ηeat and calcium treatments reprogram sweet cherry fruit metabolism during postharvest senescence as evidenced by changes in respiration, amino acid metabolism, sugars, and secondary metabolites shift. Heat and calcium treatments are used to improve postharvest fruit longevity; however, the exact mechanism remains poorly understood. To characterize the impact of these treatments on sweet cherries metabolism, 'Lapins' fruits were treated with heat or CaCl2 solutions and their combination and subsequently were exposed at room temperature, for up to 4 days, defined as senescence period. Single and combined heat and calcium treatments partially delayed fruit senescence, as evidenced by changes in fruit colour darkening, skin penetration force, and respiration activity. Calcium content was noticeably increased by heat in Ca-treated fruit. Several primary metabolites, including amino acids, organic acids, and alcohols, were decreased in response to both treatments, while many soluble sugars and secondary metabolites were increased within 1 day post-treatment. Changes of several metabolites in heat-treated fruits, especially esculetin, peonidin 3-O-glucoside and peonidin 3-O-galactoside, ribose, pyroglutamate, and isorhamnetin-3-O-rutinoside, were detected. The metabolome of fruit exposed to calcium also displayed substantial modulations, particularly in the levels of galactose, glycerate, aspartate, tryptophan, phospharate rutin, and peonidin 3-O-glucoside. The expression of several genes involved in TCA cycle (MDH1, IDH1, OGDH, SUCLA2, and SDH1-1), pectin degradation (ADPG1) as well as secondary (SK1, 4CL1, HCT, and BAN), amino acids (ALDH18A1, ALDH4A1, GS, GAD, GOT2, OPLAH, HSDH, and SDS), and sugar (PDHA1 and DLAT) metabolism were affected by both treatments. Pathway-specific analysis further revealed the regulation of fruit metabolic programming by heat and calcium. This work provides a comprehensive understanding of metabolic regulation in response to heat and calcium during fruit senescence.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thermi, 57001, Thessaloniki, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thermi, 57001, Thessaloniki, Greece
| | - Georgia Tanou
- Institute of Soil and Water Resources, ELGO-DEMETER, 57001, Thessaloníki, Greece
| | - Eirini Sarrou
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, 57001, Thessaloníki, Greece
| | | | - Ioannis Ganopoulos
- Institute of Plant Breeding and Genetic Resources, ELGO-DEMETER, 57001, Thessaloníki, Greece
| | - Katerina Karamanoli
- Laboratory of Agricultural Chemistry, School of Agriculture, Aristotle University of Thessaloniki, Thessaloníki, 54124, Greece
| | | | - Stefan Martens
- Department of Food Quality and Nutrition, Centro Ricerca E Innovazione, Fondazione Edmund Mach, San Michele All'adige, 38010, Trento, Italy
| | - Athanassios Molassiotis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thermi, 57001, Thessaloniki, Greece.
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Michailidis M, Karagiannis E, Polychroniadou C, Tanou G, Karamanoli K, Molassiotis A. Metabolic features underlying the response of sweet cherry fruit to postharvest UV-C irradiation. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 144:49-57. [PMID: 31557639 DOI: 10.1016/j.plaphy.2019.09.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 09/17/2019] [Accepted: 09/18/2019] [Indexed: 06/10/2023]
Abstract
The impact of ultraviolet-C (UV-C) irradiation on sweet cherry fruit was studied. Following harvest, fruits (cv. Sweetheart) were exposed to different doses of UV-C (0, 1.2, 3.0 or 6.0 kJ m-2) and then cold stored (0 °C) for 10 days. Treatments with UV-C delayed most ripening features and reduced pitting symptoms, particularly following prolonged UV-C application. Also, application of the highest UV-C dose inhibited pectin degradation and delayed skin resistance to penetration. An activation of antioxidants capacity and bioactive compounds, such as flavonoids and phenolics was observed. Illumination with UV-C diminished respiration and altered metabolite profile in whole fruit and skin samples. Several amino acids (eg., threonine and aspartate), sugars, (eg., glucose and fructose) and alcohols (e.g., inositol and mannitol) were modulated by long-term UV-C treatment in whole cherry fruit. Various metabolites, including malate, galacturonate, oxoproline and glutamine were also modulated by UV-C skin tissue. These data enhance our understanding of UV-C function in fruit biology.
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Affiliation(s)
- Michail Michailidis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evangelos Karagiannis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Chrysanthi Polychroniadou
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgia Tanou
- Institute of Soil and Water Resources, ELGO-DEMETER, Thessaloniki, 57001, Greece
| | - Katerina Karamanoli
- Laboratory of Agricultural Chemistry, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Athanassios Molassiotis
- Laboratory of Pomology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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Jiang F, Lopez A, Jeon S, de Freitas ST, Yu Q, Wu Z, Labavitch JM, Tian S, Powell ALT, Mitcham E. Disassembly of the fruit cell wall by the ripening-associated polygalacturonase and expansin influences tomato cracking. HORTICULTURE RESEARCH 2019; 6:17. [PMID: 30729007 PMCID: PMC6355925 DOI: 10.1038/s41438-018-0105-3] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 10/07/2018] [Accepted: 10/14/2018] [Indexed: 05/06/2023]
Abstract
Fruit cracking is an important problem in horticultural crop production. Polygalacturonase (SlPG) and expansin (SlEXP1) proteins cooperatively disassemble the polysaccharide network of tomato fruit cell walls during ripening and thereby, enable softening. A Golden 2-like (GLK2) transcription factor, SlGLK2 regulates unripe fruit chloroplast development and results in elevated soluble solids and carotenoids in ripe fruit. To determine whether SlPG, SlEXP1, or SlGLK2 influence the rate of tomato fruit cracking, the incidence of fruit epidermal cracking was compared between wild-type, Ailsa Craig (WT) and fruit with suppressed SlPG and SlEXP1 expression (pg/exp) or expressing a truncated nonfunctional Slglk2 (glk2). Treating plants with exogenous ABA increases xylemic flow into fruit. Our results showed that ABA treatment of tomato plants greatly increased cracking of fruit from WT and glk2 mutant, but not from pg/exp genotypes. The pg/exp fruit were firmer, had higher total soluble solids, denser cell walls and thicker cuticles than fruit of the other genotypes. Fruit from the ABA treated pg/exp fruit had cell walls with less water-soluble and more ionically and covalently-bound pectins than fruit from the other lines, demonstrating that ripening-related disassembly of the fruit cell wall, but not elimination of SlGLK2, influences cracking. Cracking incidence was significantly correlated with cell wall and wax thickness, and the content of cell wall protopectin and cellulose, but not with Ca2+ content.
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Affiliation(s)
- Fangling Jiang
- Department of Horticulture, Nanjing Agricultural University, Nanjing, 210095 China
- Department of Plant Sciences, University of California, Davis, 95616 USA
| | - Alfonso Lopez
- Department of Plant Sciences, University of California, Davis, 95616 USA
| | - Shinjae Jeon
- Department of Plant Sciences, University of California, Davis, 95616 USA
- Gangwon Agricultural Research and Extension Services, Chuncheon, 200-150 South Korea
| | | | - Qinghui Yu
- Department of Plant Sciences, University of California, Davis, 95616 USA
- Institute of Vegetables, Xinjiang Academy of Agricultural Sciences, 830091 Urumchi, China
| | - Zhen Wu
- Department of Horticulture, Nanjing Agricultural University, Nanjing, 210095 China
| | - John M. Labavitch
- Department of Plant Sciences, University of California, Davis, 95616 USA
| | - Shengke Tian
- Department of Plant Sciences, University of California, Davis, 95616 USA
- College of Environmental and Resource Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Ann L. T. Powell
- Department of Plant Sciences, University of California, Davis, 95616 USA
| | - Elizabeth Mitcham
- Department of Plant Sciences, University of California, Davis, 95616 USA
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Integration of Transcriptome, Proteome, and Metabolome Provides Insights into How Calcium Enhances the Mechanical Strength of Herbaceous Peony Inflorescence Stems. Cells 2019; 8:cells8020102. [PMID: 30704139 PMCID: PMC6406379 DOI: 10.3390/cells8020102] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/23/2019] [Accepted: 01/28/2019] [Indexed: 12/21/2022] Open
Abstract
Weak stem mechanical strength severely restrains cut flowers quality and stem weakness can be alleviated by calcium (Ca) treatment, but the mechanisms underlying Ca-mediated enhancement of stem mechanical strength remain largely unknown. In this study, we performed a comparative transcriptomic, proteomic, and metabolomic analysis of herbaceous peony (Paeonia lactiflora Pall.) inflorescence stems treated with nanometer Ca carbonate (Nano-CaCO₃). In total, 2643 differentially expressed genes (DEGs) and 892 differentially expressed proteins (DEPs) were detected between the Control and nano-CaCO₃ treatment. Among the 892 DEPs, 152 were coregulated at both the proteomic and transcriptomic levels, and 24 DEPs related to the secondary cell wall were involved in signal transduction, energy metabolism, carbohydrate metabolism and lignin biosynthesis, most of which were upregulated after nano-CaCO₃ treatment during the development of inflorescence stems. Among these four pathways, numerous differentially expressed metabolites (DEMs) related to lignin biosynthesis were identified. Furthermore, structural observations revealed the thickening of the sclerenchyma cell walls, and the main wall constitutive component lignin accumulated significantly in response to nano-CaCO₃ treatment, thereby indicating that Ca can enhance the mechanical strength of the inflorescence stems by increasing the lignin accumulation. These results provided insights into how Ca treatment enhances the mechanical strength of inflorescence stems in P. lactiflora.
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Stavridou E, Michailidis M, Gedeon S, Ioakeim A, Kostas S, Chronopoulou E, Labrou NE, Edwards R, Day A, Nianiou-Obeidat I, Madesis P. Tolerance of Transplastomic Tobacco Plants Overexpressing a Theta Class Glutathione Transferase to Abiotic and Oxidative Stresses. FRONTIERS IN PLANT SCIENCE 2019; 9:1861. [PMID: 30687339 PMCID: PMC6337918 DOI: 10.3389/fpls.2018.01861] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/03/2018] [Indexed: 05/31/2023]
Abstract
Chloroplasts are organelles subjected to extreme oxidative stress conditions. Biomolecules produced in the chloroplasts act as signals guiding plant metabolism toward stress tolerance and play a major role in regulating gene expression in the nucleus. Herein, we used transplastomic plants as an alternative approach to expression of transgenes in the nucleus for conferring stress tolerance to abiotic stresses and herbicides. To investigate the morphophysiological and molecular mechanisms and the role of plastid expressed GSTs in tobacco stress detoxification and stress tolerance, we used transplastomic tobacco lines overexpressing a theta class glutathione transferase (GST) in chloroplasts. The transplastomic plants were tested under drought (0, 100, and 200 mM mannitol) and salinity (0, 150, and 300 mM NaCl) in vitro, and under herbicide stress (Diquat). Our results suggest that pt AtGSTT lines were tolerant to herbicide-induced oxidative and salinity stresses and showed enhanced response tolerance to mannitol-induced osmotic stress compared to WT plants. Overexpression of the Arabidopsis thaliana AtGSTT in the chloroplasts resulted in enhanced photo-tolerance and turgor maintenance under stress. Whole-genome transcriptome analysis revealed that genes related to stress tolerance, were upregulated in pt AtGSTT2a line under both control and high mannitol stress conditions. Transplastomic plants overexpressing the pt AtGSTT2a in the chloroplast showed a state of acclimation to stress, as only limited number of genes were upregulated in the pt AtGSTT2a transplastomic line compared to WT under stress conditions while at the same time genes related to stress tolerance were upregulated in pt AtGSTT2a plants compared to WT in stress-free conditions. In parallel, the metabolic profile indicated limited perturbations of the metabolic homeostasis in the transplastomic lines and greater accumulation of mannitol, and soluble sugars under high mannitol stress. Therefore, transplastomic lines seem to be in a state of acclimation to stress under stress-free conditions, which was maintained even under high mannitol stress. The results help to elucidate the role of GSTs in plant abiotic stress tolerance and the underlying mechanisms of the GSTs expressed in the chloroplast, toward environmental resilience of cultivated crops.
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Affiliation(s)
- Evangelia Stavridou
- Institute of Applied Biosciences, Centre for Research & Technology Hellas, Thessaloniki, Greece
| | - Michail Michailidis
- Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Stella Gedeon
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Antri Ioakeim
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Stefanos Kostas
- Laboratory of Ornamental Plants, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evangelia Chronopoulou
- Laboratory of Enzyme Technology, Department of Biotechnology, School of Food, Biotechnology and Development, Agricultural University of Athens, Athens, Greece
| | - Nikolaos E. Labrou
- Laboratory of Enzyme Technology, Department of Biotechnology, School of Food, Biotechnology and Development, Agricultural University of Athens, Athens, Greece
| | - Robert Edwards
- School of Natural and Environmental Sciences, Faculty of Science, Agriculture and Engineering, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Anil Day
- School of Biological Sciences, The University of Manchester, Manchester, United Kingdom
| | - Irini Nianiou-Obeidat
- Laboratory of Genetics and Plant Breeding, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Panagiotis Madesis
- Institute of Applied Biosciences, Centre for Research & Technology Hellas, Thessaloniki, Greece
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Ethylene -dependent and -independent superficial scald resistance mechanisms in 'Granny Smith' apple fruit. Sci Rep 2018; 8:11436. [PMID: 30061655 PMCID: PMC6065312 DOI: 10.1038/s41598-018-29706-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 07/17/2018] [Indexed: 12/22/2022] Open
Abstract
Superficial scald is a major physiological disorder of apple fruit (Malus domestica Borkh.) characterized by skin browning following cold storage; however, knowledge regarding the downstream processes that modulate scald phenomenon is unclear. To gain insight into the mechanisms underlying scald resistance, ‘Granny Smith’ apples after harvest were treated with diphenylamine (DPA) or 1-methylcyclopropene (1-MCP), then cold stored (0 °C for 3 months) and subsequently were ripened at room temperature (20 °C for 8 days). Phenotypic and physiological data indicated that both chemical treatments induced scald resistance while 1-MCP inhibited the ethylene-dependent ripening. A combination of multi-omic analysis in apple skin tissue enabled characterization of potential genes, proteins and metabolites that were regulated by DPA and 1-MCP at pro-symptomatic and scald-symptomatic period. Specifically, we characterized strata of scald resistance responses, among which we focus on selected pathways including dehydroabietic acid biosynthesis and UDP-D-glucose regulation. Through this approach, we revealed scald-associated transcriptional, proteomic and metabolic signatures and identified pathways modulated by the common or distinct functions of DPA and 1-MCP. Also, evidence is presented supporting that cytosine methylation-based epigenetic regulation is involved in scald resistance. Results allow a greater comprehension of the ethylene–dependent and –independent metabolic events controlling scald resistance.
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Karagiannis E, Michailidis M, Karamanoli K, Lazaridou A, Minas IS, Molassiotis A. Postharvest responses of sweet cherry fruit and stem tissues revealed by metabolomic profiling. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 127:478-484. [PMID: 29705568 DOI: 10.1016/j.plaphy.2018.04.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/03/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
Sweet cherry, a non-climacteric and highly perishable fruit, is usually cold-stored during post-harvest period to prevent senescence; therefore, metabolic profiling in response to cold storage in sweet cherry is of economic and scientific interest. In the present work, metabolic analysis was performed in fruit and stem tissues to determine the metabolic dynamics associated with cold storage in response to 1-methylcyclopropene (1-MCP), an ethylene-action inhibitor, and modified atmosphere packaging (MAP). Fruit (cv. Regina) following harvest were treated with 1-MCP and then cold-stored (0 °C, relative humidity 95%) for 1 month in the presence or in the absence of MAP and subsequently maintained at 20 °C for up to 2 days. Physiological analysis suggested that cold storage stimulated anthocyanin production, respiration rate and stem browning. Cherry stem exposed to 1-MCP displayed senescence symptoms as demonstrated by the higher stem browning and the lower stem traction force while MAP treatment considerably altered these features. The metabolic profile of fruits and stems just following cold storage was distinctly different from those analyzed at harvest. Marked tissue-specific differences were also detected among sweet cherries exposed to individual and to combined 1-MCP and MAP treatments, notably for amino acid biosynthesis. The significance of some of these metabolites as cold storage hallmarks is discussed in the context of the limited knowledge on the 1-MCP and MAP response mechanisms at the level of cherry fruit and stem tissues. Overall, this study provides the first steps toward understanding tissue-specific postharvest behavior in sweet cherry under various conditions.
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Affiliation(s)
- Evangelos Karagiannis
- Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Michail Michailidis
- Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Katerina Karamanoli
- Laboratory of Agricultural Chemistry, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Athina Lazaridou
- Laboratory of Food Chemistry and Biochemistry, Department of Food Science and Technology, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Ioannis S Minas
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO, USA
| | - Athanassios Molassiotis
- Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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