Asexual reproduction and vegetative growth of <i>Bionectria ochroleuca</i> in response to temperature and photoperiod

Zheng, Yi; Xie, Yichun; Xie, Yan; Yu, Shixiao

doi:10.1002/ece3.7856

Cited by 5 publications

(4 citation statements)

References 110 publications

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“…Statistical analyses indicated an overall trade-off between the two variables, i.e. IVGR and SP, at the species level, supporting previous studies on Bionectria ochroleuca which, again, has been reported as a fungal plant pathogen, an endophyte in plant tissues or as a free-living form rather than a strict saprobe [ 44 ]. However, statistical analyses conducted separately on data of either P. gigantea from Norway spruce or from Scots pine pointed to a clear and significant trade-off between the two variables only with reference to isolates collected from Norway spruce.…”

Section: Discussionsupporting

confidence: 83%

Host-associated Intraspecific Phenotypic Variation in the Saprobic Fungus Phlebiopsis gigantea

et al. 2023

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Whether intraspecific phenotypic variation in saprobic fungi may be driven by the host of origin has received little attention. We addressed this issue by testing hypotheses using the model system Phlebiopsis gigantea, a wood destroying fungus associated with Picea abies and Pinus sylvestris, among others, and widely employed in practical forestry as a biological control agent. By examining approximately 60 sympatric P. gigantea isolates from both P. abies and P. sylvestris, we showed that the former grew in vitro significantly (P < 0.05) slower than the latter (average 5.56 mm/day vs. 6.84) while producing 1.8-fold significantly higher number of mitospores. An overall significant trade-off between these two phenotypic traits was detected, in particular for isolates originating from P. abies. Comparative inoculation experiments of a subsample of isolates and the assessment of mycelial growth in logs of both hosts allowed to reject the hypothesis that isolates are equally fit in terms of growth rate in wood of both hosts regardless of the host of origin. Tree models revealed that the growth rate of isolates was associated not only with the wood species in which the isolates were inoculated (P < 0.001), P. sylvestris being more rapidly colonized than P. abies, but also with the host of origin of isolates (P < 0.001). Results showed that P. gigantea isolates originating from different hosts differ phenotypically in terms of some key phenotypic traits demonstrating that a host-driven intraspecific phenotypic variation may occur in saprobic fungi.

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Section: Discussionsupporting

confidence: 83%

Host-associated Intraspecific Phenotypic Variation in the Saprobic Fungus Phlebiopsis gigantea

et al. 2023

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“…Symptomatic plant parts were first cut into small pieces and placed on potato dextrose agar (PDA; streptomycin: 40 µg ml −1 , China). Fungal colonies were purified to individual isolates in order to separate the potential pathogenic strains (Zheng et al, 2021). We extracted total genomic DNA for each of the fungal isolates with the help of Qiagen Plant DNeasy kits (Qiagen, Hilden, Germany).…”

Section: Assessment Of Fungal Disease Of V Mangachapoimentioning

confidence: 99%

“…A 30 µL PCR reaction mixture included the following: 15 µL of Phusion Master Mix (2×), 10 µL of DNA template, 3 µL of primer, and 2 µL of dd H 2 O. The PCR conditions were as following: a hot start at 98 • C for 1 min; then 30 cycles of 98 • C for 30 s, 55 • C for 30 s and 72 • C for 30 s; and a final extension at 72 • C for 5 min (Zheng et al, 2021)…”

Section: Assessment Of Fungal Disease Of V Mangachapoimentioning

confidence: 99%

Threat categories of Vatica mangachapoi should be reassessed

Yu,

Pei,

Zhang

2024

Front. For. Glob. Change

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IntroductionAsian tropical rainforests have the highest rates of degradation in the world. Consequently, a large decline in Chinese Vatica mangachapoi (a keystone species) had led to its listing in the category of “vulnerable” species by IUCN. However, its current status after decades of conservation efforts remains unknown.MethodsHere, we evaluate the current status of Chinese V. mangachapoi.Results and DiscussionWe found that its population is now dispersed in 14 protected areas, the largest being a coastal forest that contains 96.84% of all the Chinese V. mangachapoi. Compared to their historic records, the age of this forest was estimated at ≤ 70 years. The mono-culturing of V. mangachapoi in this forest, since 1960, has replaced all the older trees, resulting in its extremely high (91%) relative abundance, and an extensively low (only 44) tree species richness. Further, these V. mangachapoi trees now suffer from vine strangulations and severe Amauroderma perplexum infections: 18.5% of V. mangachapoi have died and 75% are at a high risk, thereby creating a threat of its extinction. Although, the other 13 protected areas have a higher tree species richness (152–451), a lower (6.1–25%) relative abundance of V. mangachapoi, and they neither suffer from vine strangulation or disease infections, they contribute to only 3.16% of total Chinese population of this species. Therefore, an immediate revision of threat status of this species in IUCN, from vulnerable to endangered, is warranted. Further, a change in planting patterns, from monocultures to mix-plantations of native species, is needed to promote biodiversity and restrict other biotic challenges so that this species is not extinct.

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“…Organisms frequently exhibit functional tradeoffs. For example, tradeoffs have been observed in fungi between growth and enzymatic activity (Zheng et al, 2020), between growth and reproduction [ 29 , 30 ] and between growth and defense [ 31 ]. Still other tradeoffs occur because organisms frequently cannot excel along the entire length of an environmental gradient.…”

Section: Introductionmentioning

confidence: 99%

Many foliar endophytic fungi of Quercus gambelii are capable of psychrotolerant saprotrophic growth

Weatherhead

Davis²

2022

PLoS ONE

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Many endophytic fungi have the potential to function as saprotrophs when living host tissues senesce and enter the litter pool. The consumption of plant litter by fungi obviously requires moisture but, in the arid, western USA, the native range of Quercus gambelii Nutt., most of the precipitation occurs during the coldest months of the year. Therefore, we hypothesized that the endophytic fungi of Q. gambelii have the potential to function as psychrotolerant saprotrophs, which we defined in this study as an organism capable of significant growth on leaf litter at 5°C. We further hypothesized that a tradeoff exists between growth of endophytic fungi at 5°C and at 17°C such that fungal isolates are either cold- or warm-temperature specialists. Consistent with our first hypothesis, we found that 36 of our 40 isolates consumed leaf litter at 5°C, but there was a surprisingly high degree of variability among isolates in this ability, even among isolates of a given species. Contrary to our second hypothesis, there was no tradeoff between saprotrophic growth at 5°C and saprotrophic growth at 17°C. Indeed, the isolates that grew poorly as saprotrophs at 5°C were generally those that grew poorly as saprotrophs at 17°C. By virtue of being endophytic, endophytic fungi have priority in litter over decomposer fungi that colonize plant tissues only after they enter the litter pool. Moreover, by virtue of being psychrotolerant, some endophytic fungi may function as saprotrophs during the cold months of the year when moisture is temporarily available. Therefore, we suggest that some endophytic fungi of Q. gambelii could play significant ecosystem roles in litter decomposition and nutrient cycling.

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Asexual reproduction and vegetative growth of Bionectria ochroleuca in response to temperature and photoperiod

Cited by 5 publications

References 110 publications

Host-associated Intraspecific Phenotypic Variation in the Saprobic Fungus Phlebiopsis gigantea

Host-associated Intraspecific Phenotypic Variation in the Saprobic Fungus Phlebiopsis gigantea

Threat categories of Vatica mangachapoi should be reassessed

Many foliar endophytic fungi of Quercus gambelii are capable of psychrotolerant saprotrophic growth

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