Fermentation behavior of osmophilic yeast Candida tropicalis isolated from the nectar of Hibiscus rosa sinensis flowers for xylitol production

Misra, Swati; Raghuwanshi, Shailendra; Gupta, P. K.; Dutt, Kakoli; Saxena, Rajendra Kumar

doi:10.1007/s10482-011-9646-2

Cited by 21 publications

(15 citation statements)

References 29 publications

(32 reference statements)

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“…Our results show that more than 80% of yeasts isolated from blossoms assimilated D ‐xylose. Moreover, the species C. boidinii , C. parapsilosis , C. tropicalis , D. hansenii , and M. guilliermondii , isolated mainly from blossoms , have been reported to produce xylitol from xylose . The smallest proportion of xylose and saccharose utilizing yeasts originated from fruits.…”

Section: Discussionmentioning

confidence: 99%

Extracellular enzymatic activities and physiological profiles of yeasts colonizing fruit trees

Molnárová

Vadkertiová

Stratilová

2013

J. Basic Microbiol.

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Yeasts form a significant and diverse part of the phyllosphere microbiota. Some yeasts that inhabit plants have been found to exhibit extracellular enzymatic activities. The aim of the present study was to investigate the ability of yeasts isolated from leaves, fruits, and blossoms of fruit trees cultivated in Southwest Slovakia to produce extracellular enzymes, and to discover whether the yeasts originating from these plant organs differ from each other in their physiological properties. In total, 92 strains belonging to 29 different species were tested for: extracellular protease, β-glucosidase, lipase, and polygalacturonase activities; fermentation abilities; the assimilation of xylose, saccharose and alcohols (methanol, ethanol, glycerol); and for growth in a medium with 33% glucose. The black yeast Aureobasidium pullulans showed the largest spectrum of activities of all the species tested. Almost 70% of the strains tested demonstrated some enzymatic activity, and more than 90% utilized one of the carbon compounds tested. Intraspecies variations were found for the species of the genera Cryptococcus and Pseudozyma. Interspecies differences of strains exhibiting some enzymatic activities and utilizing alcohols were also noted. The largest proportion of the yeasts exhibited β-glucosidase activity and assimilated alcohols independently of their origin. The highest number of strains positive for all activities tested was found among the yeasts associated with leaves. Yeasts isolated from blossoms assimilated saccharose and D-xylose the most frequently of all the yeasts tested. The majority of the fruit-inhabiting yeasts grew in the medium with higher osmotic pressure.

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Section: Discussionmentioning

confidence: 99%

Extracellular enzymatic activities and physiological profiles of yeasts colonizing fruit trees

Molnárová

Vadkertiová

Stratilová

2013

J. Basic Microbiol.

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“…In the food industry, osmolytic strains of C. tropicalis improve xylitol production (Kwon et al, 2006 ; Misra et al, 2012 ). Rao et al ( 2006 ) used C. tropicalis strains in hypersaline solution to produce xylitol from corn fiber and sugarcane bagasse.…”

Section: Tropicalis Osmotic Stress Response and Biotechnomentioning

confidence: 99%

An Update on Candida tropicalis Based on Basic and Clinical Approaches

2017

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Candida tropicalis has emerged as one of the most important Candida species. It has been widely considered the second most virulent Candida species, only preceded by C. albicans. Besides, this species has been recognized as a very strong biofilm producer, surpassing C. albicans in most of the studies. In addition, it produces a wide range of other virulence factors, including: adhesion to buccal epithelial and endothelial cells; the secretion of lytic enzymes, such as proteinases, phospholipases, and hemolysins, bud-to-hyphae transition (also called morphogenesis) and the phenomenon called phenotypic switching. This is a species very closely related to C. albicans and has been easily identified with both phenotypic and molecular methods. In addition, no cryptic sibling species were yet described in the literature, what is contradictory to some other medically important Candida species. C. tropicalis is a clinically relevant species and may be the second or third etiological agent of candidemia, specifically in Latin American countries and Asia. Antifungal resistance to the azoles, polyenes, and echinocandins has already been described. Apart from all these characteristics, C. tropicalis has been considered an osmotolerant microorganism and this ability to survive to high salt concentration may be important for fungal persistence in saline environments. This physiological characteristic makes this species suitable for use in biotechnology processes. Here we describe an update of C. tropicalis, focusing on all these previously mentioned subjects.

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“…Fourth, the ways in which nectar yeasts modify the environmental conditions of their habitats can be easily characterized, allowing detailed investigations into species interactions driven by niche preemption and modification. In addition to altering the sugar composition and concentration in floral nectar (Canto et al, ; Canto & Herrera, ; Herrera, García, & Pérez, ; Misra, Raghuwanshi, Gupta, Dutt, & Saxena, ; Pozo, de Vega, Canto, & Herrera, ; Schaeffer, Vannette, & Irwin, ), nectar yeasts can modify nectar secondary (specialized) metabolites (Vannette & Fukami, ), produce volatile organic compounds to attract pollinators (Golonka, Johnson, Freeman, & Hinson, ; Pozo et al, ; Raguso, ; Rering et al, ), draw down nitrogen in nectar (Dhami, Hartwig, & Fukami, ; Peay et al, ; Vannette & Fukami, ), and even increase nectar temperature (Herrera & Medrano, ; Herrera & Pozo, ). Researchers can use synthetic nectar to test how changing abiotic factors mediate biotic interactions between nectar microbes and other actors, such as pollinators.…”

Section: Nectar Yeast Communities As a Natural Microcosmmentioning

confidence: 99%

Nectar yeasts: a natural microcosm for ecology

Chappell

Fukami

2018

Yeast

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The species of yeasts that colonize floral nectar can modify the mutualistic relationships between plants and pollinators by changing the chemical properties of nectar. Recent evidence supporting this possibility has led to increased interest among ecologists in studying these fungi as well as the bacteria that interact with them in nectar. Although not fully explored, nectar yeasts also constitute a promising natural microcosm that can be used to facilitate development of general ecological theory. We discuss the methodological and conceptual advantages of using nectar yeasts from this perspective, including simplicity of communities, tractability of dispersal, replicability of community assembly, and the ease with which the mechanisms of species interactions can be studied in complementary experiments conducted in the field and the laboratory. To illustrate the power of nectar yeasts as a study system, we discuss several topics in community ecology, including environmental filtering, priority effects, and metacommunity dynamics. An exciting new direction is to integrate metagenomics and comparative genomics into nectar yeast research to address these fundamental ecological topics.

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Fermentation behavior of osmophilic yeast Candida tropicalis isolated from the nectar of Hibiscus rosa sinensis flowers for xylitol production

Cited by 21 publications

References 29 publications

Extracellular enzymatic activities and physiological profiles of yeasts colonizing fruit trees

Extracellular enzymatic activities and physiological profiles of yeasts colonizing fruit trees

An Update on Candida tropicalis Based on Basic and Clinical Approaches

Nectar yeasts: a natural microcosm for ecology

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