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Zou Y, Zhang L, Liu R, He L, Hu Z, Liang Y, Lin F, Zhou Y. Endophytic fungus Falciphora oryzae enhances salt tolerance by modulating ion homeostasis and antioxidant defense systems in pepper. PHYSIOLOGIA PLANTARUM 2023; 175:e14059. [PMID: 38148194 DOI: 10.1111/ppl.14059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/07/2023] [Accepted: 10/09/2023] [Indexed: 12/28/2023]
Abstract
Endophytic fungi play an important role in the induction of plant tolerance to abiotic and biotic stresses. However, the role of endophytic fungi in the response of horticultural plants to plant stress remains largely unknown. Here, we addressed the role of the endophytic fungus Falciphora oryzae in enhancing salt tolerance in pepper (Capsicum annuum L.) by inoculation with the endophyte in the rhizosphere. F. oryzae could indeed colonize the roots of pepper and significantly improved the tolerance of pepper to salt stress. This resulted in increased plant growth and photosynthetic performance compared with control plants, which was accompanied by increases in indole acetic acid and abscisic acid biosynthesis and signaling. Furthermore, inoculation with F. oryzae significantly upregulated a subset of transcripts involved in Na+ homeostasis (NHX3, NHX6, NHX8, HKT2-1, and SOS1) and the high-affinity K+ transporter protein-related gene HAK1 in the leaves to maintain Na+ /K+ homeostasis. Moreover, the activity of antioxidant enzymes (catalase, peroxidase, glutathione, and ascorbate peroxidase), the content of glutathione, the transcript level of genes related to antioxidants (catalase, ascorbate peroxidase, glutathione reductase, peroxidase, glutamate-cysteine ligase, and glutamine synthetase) in the leaves were significantly upregulated after inoculation with F. oryzae, which led to decreased levels of lipid peroxidation (malondialdehyde) and reactive oxygen species. These results indicate that inoculation with F. oryzae can enhance the salt tolerance of pepper by promoting ion homeostasis and upregulating antioxidant defense systems.
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Affiliation(s)
- Yuwen Zou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Limeng Zhang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Ruicheng Liu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Liqun He
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Zhangjian Hu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Yan Liang
- Department of Plant Protection, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Fucheng Lin
- Department of Plant Protection, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
- Hainan Institute, Zhejiang University, Sanya, P.R. China
| | - Yanhong Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
- Hainan Institute, Zhejiang University, Sanya, P.R. China
- Key Laboratory of Horticultural Plant Growth and Development, Agricultural Ministry of China, Hangzhou, P.R. China
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Li L, Feng Y, Qi F, Hao R. Research Progress of Piriformospora indica in Improving Plant Growth and Stress Resistance to Plant. J Fungi (Basel) 2023; 9:965. [PMID: 37888222 PMCID: PMC10607969 DOI: 10.3390/jof9100965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/14/2023] [Accepted: 09/21/2023] [Indexed: 10/28/2023] Open
Abstract
Piriformospora indica (Serendipita indica), a mycorrhizal fungus, has garnered significant attention in recent decades owing to its distinctive capacity to stimulate plant growth and augment plant resilience against environmental stressors. As an axenically cultivable fungus, P. indica exhibits a remarkable ability to colonize varieties of plants and promote symbiotic processes by directly influencing nutrient acquisition and hormone metabolism. The interaction of plant and P. indica raises hormone production including ethylene (ET), jasmonic acid (JA), gibberellin (GA), salicylic acid (SA), and abscisic acid (ABA), which also promotes root proliferation, facilitating improved nutrient acquisition, and subsequently leading to enhanced plant growth and productivity. Additionally, the plant defense system was employed by P. indica colonization and the defense genes associated with oxidation resistance were activated subsequently. This fungus-mediated defense response elicits an elevation in the enzyme activity of antioxidant enzymes, including superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), and, finally, bolsters plant tolerance. Furthermore, P. indica colonization can initiate local and systemic immune responses against fungal and viral plant diseases through signal transduction mechanisms and RNA interference by regulating defense gene expression and sRNA secretion. Consequently, P. indica can serve diverse roles such as plant promoter, biofertilizer, bioprotectant, bioregulator, and bioactivator. A comprehensive review of recent literature will facilitate the elucidation of the mechanistic foundations underlying P. indica-crop interactions. Such discussions will significantly contribute to an in-depth comprehension of the interaction mechanisms, potential applications, and the consequential effects of P. indica on crop protection, enhancement, and sustainable agricultural practices.
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Affiliation(s)
- Liang Li
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China; (Y.F.); (F.Q.); (R.H.)
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Wang W, Cai T, Yang Y, Guo H, Shang Z, Shahid H, Zhang Y, Qiu S, Zeng X, Xu X, Liu Y, Fang P, Ding P, Mao Z, Shan T. Diversity of Fungal Communities on Diseased and Healthy Cinnamomum burmannii Fruits and Antibacterial Activity of Secondary Metabolites. Microbiol Spectr 2023; 11:e0008023. [PMID: 37162357 PMCID: PMC10269519 DOI: 10.1128/spectrum.00080-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/19/2023] [Indexed: 05/11/2023] Open
Abstract
The composition and structure of fungal communities on healthy and diseased fruits of Cinnamomum burmannii (Nees and Nees) Blume were characterized, with evaluation of the antibacterial activity of secondary metabolites from culturable fungi following the first identification of secondary metabolites in the fungus Medicopsis romeroi (Esf-14; GenBank accession number OK242756). These results are significant for understanding the functional variation in bioactivity in fungal communities and developing a broader range of bioactive resources. High-throughput sequencing results indicated that the fungal community in diseased fruit differed from that in healthy fruit at the phylum, class, order, or genus level, with significant differences in the species and relative abundance of the dominant flora. A total of 49 (healthy fruit) and 122 (diseased fruit) artificially cultivable endophytic fungi were isolated, and 41 different strains (11 from healthy fruit and 30 from diseased fruit) were successfully identified by morphological and molecular biological analyses, which were classified into 8 groups and 23 genera by phylogenetic tree analysis, with Pleosporales, Glomerellales, and Hypocreales being the dominant groups at the order level and Colletotrichum being the dominant group at the genus level. The results of the antibacterial assay demonstrated that the secondary metabolites of all strains had different degrees of antibacterial activity, while the secondary metabolites of endophytic fungi from diseased fruit were generally stronger than those of fungi from healthy fruit, with the active secondary metabolites dominated by small and moderately polar compounds. Combined analysis of fungal communities, phylogenetic tree analysis, and bioactivity analysis of culturable strains revealed strong antibacterial activity of both upregulated and downregulated flora in diseased fruit. Five compounds, including two new (5,6-dimethoxy-[1',1:4,1″-terphenyl]-2-ol [compound 1] and 5-(methoxycarbonyl)-2-methylbenzo[d][1,3]dioxole-2-carboxylic acid [compound 2]) and three known compounds (3,7-dihydroxy-1,9-dimethyldibenzofuran [compound 3], methyl 3-hydroxybenzoate [compound 4], and uracil [compound 5]), were isolated and identified for the first time from the endophytic fungus Medicopsis romeroi. In general, the diversity of fungal communities on diseased fruit was lower than that on healthy fruits, while the antibacterial activity of artificially cultured endophytic fungi on diseased fruits was generally stronger than that on healthy fruits, suggesting excellent promise for the development of secondary metabolites from active strains on diseased fruit as antibacterial agents. IMPORTANCE Powdery fruit disease is a notorious disease of Cinnamomum burmannii that causes severe loss in fruit production. Studies on the function of endophytic fungal communities in healthy plant tissues are not new, while little is known about the functional changes of fungal communities in disease-causing plant tissues. Our results demonstrate that fungal communities in diseased fruits differ from those in healthy fruits at the level of phylum, class, order, or genus, with significant differences in the species and relative abundance of dominant groups. Endophytic fungi in diseased fruits appeared to produce secondary metabolites with stronger antibacterial properties, although the community diversity was not as varied as that in healthy fruits. In addition, secondary metabolites of the Medicopsis romeroi strain from diseased fruits were identified for the first time. These results have important implications for understanding the functional variation of bioactivity in fungal communities and for developing a broader resource of bioactivity.
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Affiliation(s)
- Wei Wang
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
- College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Teng Cai
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuting Yang
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Hui Guo
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Zhuo Shang
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Hamza Shahid
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yirong Zhang
- College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Sirun Qiu
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Xinnian Zeng
- College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Xiaoli Xu
- Instrumental Analysis and Research Center of SCAU, South China Agricultural University, Guangzhou, China
| | - Yi Liu
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Ping Fang
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Ping Ding
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ziling Mao
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Tijiang Shan
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
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Rong ZY, Lei AQ, Wu QS, Srivastava AK, Hashem A, Abd_Allah EF, Kuča K, Yang T. Serendipita indica promotes P acquisition and growth in tea seedlings under P deficit conditions by increasing cytokinins and indoleacetic acid and phosphate transporter gene expression. FRONTIERS IN PLANT SCIENCE 2023; 14:1146182. [PMID: 37008477 PMCID: PMC10064445 DOI: 10.3389/fpls.2023.1146182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 02/13/2023] [Indexed: 06/19/2023]
Abstract
The culturable endophytic fungus Serendipita indica has many beneficial effects on plants, but whether and how it affects physiological activities and phosphorus (P) acquisition of tea seedlings at low P levels is unclear. The objective of this study was to analyze the effects of inoculation with S. indica on growth, gas exchange, chlorophyll fluorescence, auxins, cytokinins, P levels, and expressions of two phosphate transporter (PT) genes in leaves of tea (Camellia sinensis L. cv. Fudingdabaicha) seedlings grown at 0.5 μM (P0.5) and 50 μM (P50) P levels. Sixteen weeks after the inoculation, S. indica colonized roots of tea seedlings, with root fungal colonization rates reaching 62.18% and 81.34% at P0.5 and P50 levels, respectively. Although plant growth behavior, leaf gas exchange, chlorophyll values, nitrogen balance index, and chlorophyll fluorescence parameters of tea seedlings were suppressed at P0.5 versus P50 levels, inoculation of S. indica mitigated the negative effects to some extent, along with more prominent promotion at P0.5 levels. S. indica inoculation significantly increased leaf P and indoleacetic acid concentrations at P0.5 and P50 levels and leaf isopentenyladenine, dihydrozeatin, and transzeatin concentrations at P0.5 levels, coupled with the reduction of indolebutyric acid at P50 levels. Inoculation of S. indica up-regulated the relative expression of leaf CsPT1 at P0.5 and P50 levels and CsPT4 at P0.5 levels. It is concluded that S. indica promoted P acquisition and growth in tea seedlings under P deficit conditions by increasing cytokinins and indoleacetic acid and CsPT1 and CsPT4 expression.
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Affiliation(s)
- Zi-Yi Rong
- College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
| | - An-Qi Lei
- College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
| | - Qiang-Sheng Wu
- College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, China
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia
| | | | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia
| | - Tianyuan Yang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, China
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Zou YN, Xu YJ, Liu RC, Huang GM, Kuča K, Srivastava AK, Hashem A, Abd_Allah EF, Wu QS. Two different strategies of Diversispora spurca-inoculated walnut seedlings to improve leaf P acquisition at low and moderate P levels. FRONTIERS IN PLANT SCIENCE 2023; 14:1140467. [PMID: 36909381 PMCID: PMC9995707 DOI: 10.3389/fpls.2023.1140467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Walnut (Juglans regia) is an important nut tree species in the world, whereas walnut trees often face inadequate phosphorus (P) levels of soil, negatively limiting its growth and yield. Arbuscular mycorrhizal fungi (AMF) can colonize walnut roots, but whether and how AMF promotes walnut growth, physiological activities, and P acquisition is unclear. The present study aimed to evaluate the effects of Diversispora spurca on plant growth, chlorophyll component concentrations, leaf gas exchange, sugar and P concentrations, and expression of purple acid phosphatase (PAP) and phosphate transporter (PT) genes in leaves of J. regia var. Liaohe 1 seedling under moderate (100 μmol/L P) and low P (1 μmol/L P) levels conditions. Three months after inoculation, the root mycorrhizal colonization rate and soil hyphal length were 45.6-53.2% and 18.7-39.9 cm/g soil, respectively, and low P treatment significantly increased both root mycorrhizal colonization rate and soil hyphal length. Low P levels inhibited plant growth (height, stem diameter, and total biomass) and leaf gas exchange (photosynthetic rate, transpiration rate and stomatal conductance), while AMF colonization significantly increased these variables at moderate and low P levels. Low P treatment limited the level of chlorophyll a, but AMF colonization did not significantly affect the level of chlorophyll components, independent on soil P levels. AMF colonization also increased leaf glucose at appropriate P levels and leaf fructose at low P levels than non-AMF treatment. AMF colonization significantly increased leaf P concentration by 21.0-26.2% than non-AMF colonization at low and moderate P levels. Low P treatment reduced the expression of leaf JrPAP10, JrPAP12, and JrPT3;2 in the inoculated plants, whereas AMF colonization up-regulated the expression of leaf JrPAP10, JrPAP12, and JrPT3;2 at moderate P levels, although AMF did not significantly alter the expression of JrPAPs and JrPTs at low P levels. It is concluded that AMF improved plant growth, leaf gas exchange, and P acquisition of walnut seedlings at different P levels, where mycorrhizal promotion of P acquisition was dominated by direct mycorrhizal involvement in P uptake at low P levels, while up-regulation of host PAPs and PTs expressions at moderate P levels.
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Affiliation(s)
- Ying-Ning Zou
- Tibet Plateau Walnut Industry Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
| | | | - Rui-Cheng Liu
- Tibet Plateau Walnut Industry Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
| | - Guang-Ming Huang
- Tibet Plateau Walnut Industry Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia
| | | | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Qiang-Sheng Wu
- Tibet Plateau Walnut Industry Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia
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