Soil Fertility Improvement by Litter Decomposition and Inoculation with the Fungus <i>Mortierella</i> sp. in Avocado Plantations of Colombia

Tamayo-Vélez, Álvaro; Osório, Nelson

doi:10.1080/00103624.2017.1417420

Cited by 43 publications

(22 citation statements)

References 25 publications

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“…Our results are consistent with Wagner et al [14] who mentioned that M. echinosphaera and M. chlamydospora are closely related. Morphological characteristics show M. chlamydospora has globose or elongated chlamydospores, with a varying number of spines that are sometimes smooth when submerged [42,43], and M. echinosphaera has globose to elongated, densely spiny chlamydospores [41,42], while our new species has globose to subglobose, echinulate sporangia. A BLAST search of NCBI's GenBank nucleotide database revealed that the closest hit received for M. rhinolophicola (KUMCC 20-0008), using the ITS sequence, was M. chlamydospora (GenBank KP881466; Identities = 98.64%), and the closest hit received for M. rhinolophicola using the 28S sequence was M. chlamydospora (GenBank KP881466; Identities = 97.15%).…”

Section: Taxonomymentioning

confidence: 85%

“…Many show a strong capacity to decompose plant litter, degrade polyaromatic hydrocarbons, and are also potential producers of c-linolenic acid, polyunsaturated fatty acids and arachidonic acid [38,39]. Several species are known to be indirectly beneficial to humans; for example, they are able to degrade herbicidal residues on crop plants; aid mycorrhizal fungi in phosphorus (P) acquisition; and have the ability to synthesize and secrete oxalic acid [40,41]. There have been reports on Mortierella species being found in cave systems [11,12].…”

Section: Taxonomymentioning

confidence: 99%

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Discovery of novel fungal species and pathogens on bat carcasses in a cave in Yunnan Province, China

Karunarathna

Dong

Karasaki

et al. 2020

Emerging Microbes & Infections

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Virulent infectious fungal diseases, in natural and managed landscapes, are increasing. Fungal diseases in humans, animals and plants have caused die-off and extinction events and have become a threat to food security. A caving expedition in Yunnan Province, China, revealed two bat carcasses covered in fungal mycelia. Eleven fungal isolates were obtained from these bat carcasses, and morphological observations and multigene phylogenetic analyses revealed they were Fusarium incarnatum, Mucor hiemalis and Trichoderma harzianum and four new species, Mortierella rhinolophicola, M. multispora, M. yunnanensis and Neocosmospora pallidimors. One of the more alarming findings is that a number of infections related to Neocosmospora, previously associated with human and animal mycotoxicoses, are reported to be increasing, and here we present a new species from this genus, isolated from dead bats. Due to the ecosystem services provided by bats, and the close relationship between bats and humans, future research should focus on the impacts and significance of N. pallidimors to human and animal health, examining its pathogenicity and secondary metabolites. Taxonomic descriptions, color images of the habitat, in situ samples, microstructures and cultures are presented. SEM photographs of microstructures and phylogenetic trees showing the placement of new and known species are also provided.

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Section: Taxonomymentioning

confidence: 85%

Section: Taxonomymentioning

confidence: 99%

Discovery of novel fungal species and pathogens on bat carcasses in a cave in Yunnan Province, China

Karunarathna

Dong

Karasaki

et al. 2020

Emerging Microbes & Infections

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“…Mortierella elongata is a saprotroph often isolated in natural soils, being related their abundance with soil improvement in nutrient quality and fertility 52,53 . It plays an important role in the degradation of several compounds, including toxic ones 54 , and its abundance can be considered an indicator of the resilience level of dehesas ecosystems.…”

Section: Discussionmentioning

confidence: 99%

Assessment of functional and structural changes of soil fungal and oomycete communities in holm oak declined dehesas through metabarcoding analysis

Gómez

Navarro-Cerrillo

Pérez‐de‐Luque

et al. 2019

Sci Rep

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Forest decline is nowadays a major challenge for ecosystem sustainability. Dehesas, which consists of savannah-like mediterranean ecosystems, are threatened by the holm oak decline in the south-west of Iberian peninsula. Phytophthora cinnamomi is considered the main agent of holm oak root rot, but little is known about the relationship between diversity of soilborne microbial community and the decline syndrome of holm oak. It would be hypothesized that the changes in the structure and functionality of the soil microbiome might influence tree health status through changes in richness and diversity of beneficial organisms such as mycorrhizal species, or fungal plant pathogens such as Fusarium spp. or Alternaria spp. total DNA of soil samples from declined oak dehesas was extracted and analyzed through metabarcoding techniques, to evaluate the specific composition and diversity of the fungal and oomycete communities and their relationship with the disease symptoms. the fungal community included a wide range of pathogens and abundance of ectomycorrhizal key taxa related with low defoliation degree. Phytophthora cinnamomi and Pythium spiculum did not appear among the most abundant oomycetes, nor were they related directly to defoliation levels. Moreover, a particular taxon belonging to the genus Trichoderma was strongly correlated with the scarcity of pathogenic Phytophthora spp. the diversity and composition of fungal and oomycete communities were related to the severity of the decline symptoms. the metabarcoding study of microbiome represents a powerful tool to develop biocontrol strategies for the management of the holm oak root rot.

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“…Hass at the Antioquia province that have been in production for the exportation market for 5 years since 2016. Orchards had comparable nutrient management ( Tamayo-Vélez et al, 2018 ), allowing for litter decomposition ( Tamayo-Vélez and Osorio, 2018 ) without irrigation or hormone supplements, and were only subjected to annual light correctional pruning. Orchards spanned three different agroecological regions, two in the dairy Northern Andean highland plateau, four in the Eastern Andean highland plateau, and two in the Southwest coffee region ( Figure 1 ).…”

Section: Methodsmentioning

confidence: 99%

Inheritance of Rootstock Effects in Avocado (Persea americana Mill.) cv. Hass

et al. 2020

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Grafting is typically utilized to merge adapted seedling rootstocks with highly productive clonal scions. This process implies the interaction of multiple genomes to produce a unique tree phenotype. However, the interconnection of both genotypes obscures individual contributions to phenotypic variation (rootstock-mediated heritability), hampering tree breeding. Therefore, our goal was to quantify the inheritance of seedling rootstock effects on scion traits using avocado (Persea americana Mill.) cv. Hass as a model fruit tree. We characterized 240 diverse rootstocks from 8 avocado cv. Hass orchards with similar management in three regions of the province of Antioquia, northwest Andes of Colombia, using 13 microsatellite markers simple sequence repeats (SSRs). Parallel to this, we recorded 20 phenotypic traits (including morphological, biomass/reproductive, and fruit yield and quality traits) in the scions for 3 years (2015–2017). Relatedness among rootstocks was inferred through the genetic markers and inputted in a “genetic prediction” model to calculate narrow-sense heritabilities (h2) on scion traits. We used three different randomization tests to highlight traits with consistently significant heritability estimates. This strategy allowed us to capture five traits with significant heritability values that ranged from 0.33 to 0.45 and model fits (r) that oscillated between 0.58 and 0.73 across orchards. The results showed significance in the rootstock effects for four complex harvest and quality traits (i.e., total number of fruits, number of fruits with exportation quality, and number of fruits discarded because of low weight or thrips damage), whereas the only morphological trait that had a significant heritability value was overall trunk height (an emergent property of the rootstock–scion interaction). These findings suggest the inheritance of rootstock effects, beyond root phenotype, on a surprisingly wide spectrum of scion traits in “Hass” avocado. They also reinforce the utility of polymorphic SSRs for relatedness reconstruction and genetic prediction of complex traits. This research is, up to date, the most cohesive evidence of narrow-sense inheritance of rootstock effects in a tropical fruit tree crop. Ultimately, our work highlights the importance of considering the rootstock–scion interaction to broaden the genetic basis of fruit tree breeding programs while enhancing our understanding of the consequences of grafting.

show abstract

Soil Fertility Improvement by Litter Decomposition and Inoculation with the Fungus Mortierella sp. in Avocado Plantations of Colombia

Cited by 43 publications

References 25 publications

Discovery of novel fungal species and pathogens on bat carcasses in a cave in Yunnan Province, China

Discovery of novel fungal species and pathogens on bat carcasses in a cave in Yunnan Province, China

Assessment of functional and structural changes of soil fungal and oomycete communities in holm oak declined dehesas through metabarcoding analysis

Inheritance of Rootstock Effects in Avocado (Persea americana Mill.) cv. Hass

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