Abstract
Fungal endophytes are the microbial adaptations that usually enter the plant tissues during their life cycle without harming the host plants. They are found everywhere on earth and generally depend on the hosts by developing various symbiotic relationships, like mutualism, hostility, and parasitism on rare occasions, leading to the growth and rise in the nutrient content of the hosts. Endophytes can develop tolerance in host organisms against the stresses induced by either living or non-living agents. They may protect them from insects or pests by building resistance. Interestingly, endophytes can synthesize many phytohormones, natural medicinal compounds and several essential enzymes beneficial for biotechnological perspectives that can be obtained by culturing plant tissue in a suitable medium. These endophytes are a reservoir of many new active phytoconstituents, like alkaloids, phenolics, steroids, quinones, tannins, saponins, etc., which exhibit anticancer, antiinsecticidal, antioxidant, antibacterial, antiviral, antifungal, and many more properties. Exploring the new bioactive chemical entities from the endophytes may supply potent lead compounds for drug discovery to combat numerous disease conditions. Hence, the present review was carried out to explore the significance of the fungal endophytes and their medicinal, food, and cosmetic use.
Keywords: Endophytes, bioactive compounds, phytohormones, secondary metabolites, drug discovery, fungal endophytes.
Graphical Abstract
[http://dx.doi.org/10.1021/es901997z] [PMID: 20000537]
[http://dx.doi.org/10.1155/2014/250693] [PMID: 24587715]
[http://dx.doi.org/10.1038/nature11237] [PMID: 22859206]
[http://dx.doi.org/10.3923/ajbmb.2011.291.309]
[http://dx.doi.org/10.1128/MMBR.67.4.491-502.2003] [PMID: 14665674]
[http://dx.doi.org/10.1007/S10267-008-0411-Y]
[http://dx.doi.org/10.1590/S1517-83822012000300045] [PMID: 24031942]
[http://dx.doi.org/10.1007/s00253-013-5235-9] [PMID: 24048641]
[http://dx.doi.org/10.5897/AJMR2013.6541]
[http://dx.doi.org/10.1016/j.tim.2007.04.001] [PMID: 17433686]
[http://dx.doi.org/10.1590/0103-9016-2014-0195]
[http://dx.doi.org/10.1038/nrmicro3109] [PMID: 24056930]
[http://dx.doi.org/10.1146/annurev-genet-110410-132549] [PMID: 21838550]
[http://dx.doi.org/10.1186/gb-2013-14-6-209] [PMID: 23805896]
[http://dx.doi.org/10.2307/3545919]
[http://dx.doi.org/10.1139/m97-131]
[http://dx.doi.org/10.1201/9781482277302]
[http://dx.doi.org/10.1007/978-1-4612-3168-4_9]
[http://dx.doi.org/10.1094/MPMI-19-0827] [PMID: 16903349]
[http://dx.doi.org/10.1016/j.tim.2008.07.008] [PMID: 18789693]
[http://dx.doi.org/10.1007/s11274-009-0191-3]
[http://dx.doi.org/10.1007/s00248-012-0017-y] [PMID: 22395783]
[http://dx.doi.org/10.3389/fpls.2013.00120] [PMID: 23641251]
[http://dx.doi.org/10.5897/AJMR12.899];
(b) Mishra, Y.; Singh, A.; Batra, A.; Sharma, M.M. Understanding the biodiversity and biological applications of endophytic fungi: A review. J. Microb. Biochem. Technol., 2014, S8, 4.
[http://dx.doi.org/10.1038/ja.2012.27] [PMID: 22511224]
[http://dx.doi.org/10.1007/BF02772897]
[http://dx.doi.org/10.1039/b100918o] [PMID: 11548053];
(b) Brakhage, A.A.; Schroeckh, V. Fungal secondary metabolites - strategies to activate silent gene clusters. Fungal Genet. Biol., 2011, 48(1), 15-22.
[http://dx.doi.org/10.1016/j.fgb.2010.04.004] [PMID: 20433937];
(c) Brakhage, A.A.; Schuemann, J.; Bergmann, S.; Scherlach, K.; Schroeckh, V.; Hertweck, C. Activation of fungal silent gene clusters: A new avenue to drug discovery. Prog. Drug Res., 2008, 66, 1-12.
[http://dx.doi.org/10.1007/978-3-7643-8595-8_1]
[http://dx.doi.org/10.2174/138955711797247716] [PMID: 21861806]
[http://dx.doi.org/10.2174/138955711794519492] [PMID: 21222580];
(b) Wankhede, D.P.; Biswas, D.K.; Rajkumar, S.; Sinha, A.K. Expressed sequence tags and molecular cloning and characterization of gene encoding pinoresinol/lariciresinol reductase from Podophyllum hexandrum. Protoplasma, 2013, 250(6), 1239-1249.
[http://dx.doi.org/10.1007/s00709-013-0505-z] [PMID: 23653238]
[http://dx.doi.org/10.3389/fmicb.2014.00715] [PMID: 25620957]
[http://dx.doi.org/10.1007/s12088-016-0600-x] [PMID: 27784939]
[http://dx.doi.org/10.1111/jam.14804] [PMID: 32743928]
[http://dx.doi.org/10.1016/j.plantsci.2020.110762] [PMID: 33487346]
[http://dx.doi.org/10.1007/s11274-020-02954-8] [PMID: 33394165]
[http://dx.doi.org/10.1126/science.8097061] [PMID: 8097061]
[http://dx.doi.org/10.1182/blood-2006-06-032250] [PMID: 17197433]
[http://dx.doi.org/10.1016/j.trac.2008.01.006]
[http://dx.doi.org/10.1007/s13225-010-0034-4]
[http://dx.doi.org/10.1016/j.micpath.2015.04.001] [PMID: 25865953]
[http://dx.doi.org/10.4014/jmb.1305.05070] [PMID: 23801250]
[http://dx.doi.org/10.1016/j.jgeb.2015.09.002] [PMID: 30647575]
[http://dx.doi.org/10.1093/nar/gkn810] [PMID: 18953024]
[http://dx.doi.org/10.1097/01.ftd.0000179845.53213.39] [PMID: 16404815]
[http://dx.doi.org/10.1038/nbt0208-162] [PMID: 18259166]
[http://dx.doi.org/10.1186/1471-2105-8-105]
[http://dx.doi.org/10.1093/bioinformatics/btn603] [PMID: 19015140]
[http://dx.doi.org/10.5936/csbj.201301011] [PMID: 24688692]
[http://dx.doi.org/10.1021/np9005025] [PMID: 20507180]
[http://dx.doi.org/10.1002/mrc.2833] [PMID: 22290710]
[http://dx.doi.org/10.1016/j.mib.2006.04.002] [PMID: 16651020]
[http://dx.doi.org/10.1016/j.tig.2010.07.001] [PMID: 20739089];
(b) Rank, C.; Larsen, T.O.; Frisvad, J.C. Functional systems biology of Aspergillus. In: Aspergillus. Molecular Biology and Genomics; Caister Academic Press; Machida, M.; Gomi, K., Eds.; NSU: Norfolk, 2010; pp. 173-198.
[http://dx.doi.org/10.1039/c1np00030f] [PMID: 21629952]
[http://dx.doi.org/10.1016/j.phytochem.2012.07.021] [PMID: 22954732];
(b) Xiong, Z.Q.; Yang, Y.Y.; Zhao, N.; Wang, Y. Diversity of endophytic fungi and screening of fungal paclitaxel producer from Anglojap yew, Taxus x media. BMC Microbiol., 2013, 13(1), 71.
[http://dx.doi.org/10.1186/1471-2180-13-71] [PMID: 23537181]
[http://dx.doi.org/10.1017/S0953756203007494] [PMID: 12825516]
[http://dx.doi.org/10.1007/s13225-010-0086-5]
[http://dx.doi.org/10.1021/np030397v] [PMID: 14987067]
[http://dx.doi.org/10.4061/2011/576286] [PMID: 21350663]
[http://dx.doi.org/10.1007/s11274-018-2431-x] [PMID: 29541936]
[http://dx.doi.org/10.1186/s12866-017-0961-2] [PMID: 28264654]
[http://dx.doi.org/10.1186/s12906-019-2752-9] [PMID: 31752824]
[http://dx.doi.org/10.2478/s11756-007-0044-1]
[http://dx.doi.org/10.1007/s10529-008-9801-7] [PMID: 18709488]
[http://dx.doi.org/10.1021/np800455b] [PMID: 19119919]
[http://dx.doi.org/10.1021/np0502802] [PMID: 16378360]
[PMID: 18669267]
[http://dx.doi.org/10.1016/j.phytochem.2009.09.030] [PMID: 19863979]
[http://dx.doi.org/10.1016/S0960-894X(99)00555-7] [PMID: 10576688];
(b) Lau, W.; Sattely, E.S. Six enzymes from mayapple that complete the biosynthetic pathway to the etoposide aglycone. Science, 2015, 349(6253), 1224-1228.
[http://dx.doi.org/10.1126/science.aac7202] [PMID: 26359402]
[http://dx.doi.org/10.1002/cbdv.200800103] [PMID: 19479845]
[http://dx.doi.org/10.4161/cc.8.15.9170] [PMID: 19571678]
[http://dx.doi.org/10.1590/S1984-82502009000400010]
[http://dx.doi.org/10.1111/j.1472-765X.2008.02470.x] [PMID: 19120929];
(b) Liu, X.; Dong, M.; Chen, X.; Jiang, M.; Lv, X.; Zhou, J. Antimicrobial activity of an endophytic Xylaria sp.YX-28 and identification of its antimicrobial compound 7-amino-4-methylcoumarin. Appl. Microbiol. Biotechnol., 2008, 78(2), 241-247.
[http://dx.doi.org/10.1007/s00253-007-1305-1] [PMID: 18092158]
[http://dx.doi.org/10.1186/s12906-021-03269-3] [PMID: 33743702]
[http://dx.doi.org/10.1016/S0924-8579(09)70004-4] [PMID: 19134521]
[http://dx.doi.org/10.1016/j.micres.2009.11.009] [PMID: 20116229]
[http://dx.doi.org/10.1086/595011] [PMID: 19035777]
[http://dx.doi.org/10.1136/bmj.a1438] [PMID: 18801866]
[http://dx.doi.org/10.1086/524891] [PMID: 18171244]
[http://dx.doi.org/10.1038/nrd3267] [PMID: 20811374]
[http://dx.doi.org/10.1021/np400391p] [PMID: 24079882]
[http://dx.doi.org/10.3390/md12052953] [PMID: 24840716]
[http://dx.doi.org/10.1002/cbdv.201200418] [PMID: 23495165]
[http://dx.doi.org/10.1111/lam.13414] [PMID: 33063859]
[http://dx.doi.org/10.2174/1568026621666210426123437] [PMID: 33902419]
[http://dx.doi.org/10.1038/s41598-021-82201-8] [PMID: 33531542]
[http://dx.doi.org/10.1007/s00284-020-02314-7] [PMID: 33386937]
[http://dx.doi.org/10.3389/fmicb.2021.716523] [PMID: 34603244];
(b) Bara, R.; Aly, A.H.; Pretsch, A.; Wray, V.; Wang, B.; Proksch, P.; Debbab, A. Antibiotically active metabolites from Talaromyces wortmannii, an endophyte of Aloe vera. J. Antibiot. (Tokyo), 2013, 66(8), 491-493.
[http://dx.doi.org/10.1038/ja.2013.28] [PMID: 23677029];
(c) Bara, R.; Aly, A.H.; Wray, V.; Lin, W.H.; Proksch, P.; Debbab, A. Talaromins A and B, new cyclic peptides from the endophytic fungus Talaromyces wortmannii. Tetrahedron Lett., 2013, 54(13), 1686-1689.
[http://dx.doi.org/10.1016/j.tetlet.2013.01.064];
(d) Janeš, D.; Kreft, S.; Jurc, M.; Seme, K.; Štrukelj, B. Antibacterial activity in higher fungi (Mushrooms) and endophytic fungi from Slovenia. Pharm. Biol., 2007, 45(9), 700-706.
[http://dx.doi.org/10.1080/13880200701575189]
[http://dx.doi.org/10.1016/j.tetlet.2004.12.110]
[http://dx.doi.org/10.1021/np000291p] [PMID: 11473437]
[http://dx.doi.org/10.1080/14786419.2020.1737058] [PMID: 32159387]
[http://dx.doi.org/10.1016/j.bmc.2014.08.039] [PMID: 25260957]
[http://dx.doi.org/10.2174/1874357920130624002] [PMID: 23961302]
[http://dx.doi.org/10.1016/j.phytochem.2011.04.014] [PMID: 21601895]
[http://dx.doi.org/10.1023/B:WIBI.0000023832.27679.a8]
[http://dx.doi.org/10.1111/j.1574-695X.2007.00331.x] [PMID: 17888010]
[http://dx.doi.org/10.1111/hiv.13116] [PMID: 33987901]
[http://dx.doi.org/10.1007/s00253-007-1171-x] [PMID: 17876580]
[http://dx.doi.org/10.1201/9780203026373]
[http://dx.doi.org/10.1590/S0103-50532009000100029]
[http://dx.doi.org/10.1128/AEM.68.10.4863-4870.2002] [PMID: 12324332]
[http://dx.doi.org/10.1016/j.jep.2021.113975] [PMID: 33652111]
[http://dx.doi.org/10.1007/s00203-021-02390-8] [PMID: 34076738]
[http://dx.doi.org/10.1371/journal.pone.0250954] [PMID: 33983974]