The Free-Living Stage Growth Conditions of the Endophytic Fungus Serendipita indica May Regulate Its Potential as Plant Growth Promoting Microbe

Dias, Teresa; Pimentel, Vivian Ribeiro; Cogo, Antônio Jesus Dorighetto; Costa, Rúben; Bertolazi, Amanda Azevedo; Miranda, Camila Cristina da Silva; Souza, Sávio Bastos de; Melo, Juliana; Carolino, Manuela; Varma, Ajit; Eutrópio, Frederico Jacob; Olivares, Fábio Lopes; Ramos, Alessandro Coutinho; Cruz, Cristina

doi:10.3389/fmicb.2020.562238

Cited by 15 publications

(8 citation statements)

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“…However, R. irregularis has a reduced enzymatic repertoire [ 45 , 46 ] and depends largely upon host-provided C and microbial transformation of nutrient sources into bioavailable forms [ 27 , 47 , 48 ]. In contrast, S. bescii and other Serendipita lineages are facultative symbionts with a broader enzymatic repertoire that enables direct resource acquisition from both living plants and detritus [ 49 – 51 ]. We hypothesized that both fungi would mitigate the effects of moisture limitation, but that bacterial community composition and growth potential would be distinct in the soils colonized by each fungus.…”

Section: Introductionmentioning

confidence: 99%

Plant-associated fungi support bacterial resilience following water limitation

et al. 2022

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Drought disrupts soil microbial activity and many biogeochemical processes. Although plant-associated fungi can support plant performance and nutrient cycling during drought, their effects on nearby drought-exposed soil microbial communities are not well resolved. We used H218O quantitative stable isotope probing (qSIP) and 16S rRNA gene profiling to investigate bacterial community dynamics following water limitation in the hyphospheres of two distinct fungal lineages (Rhizophagus irregularis and Serendipita bescii) grown with the bioenergy model grass Panicum hallii. In uninoculated soil, a history of water limitation resulted in significantly lower bacterial growth potential and growth efficiency, as well as lower diversity in the actively growing bacterial community. In contrast, both fungal lineages had a protective effect on hyphosphere bacterial communities exposed to water limitation: bacterial growth potential, growth efficiency, and the diversity of the actively growing bacterial community were not suppressed by a history of water limitation in soils inoculated with either fungus. Despite their similar effects at the community level, the two fungal lineages did elicit different taxon-specific responses, and bacterial growth potential was greater in R. irregularis compared to S. bescii-inoculated soils. Several of the bacterial taxa that responded positively to fungal inocula belong to lineages that are considered drought susceptible. Overall, H218O qSIP highlighted treatment effects on bacterial community structure that were less pronounced using traditional 16S rRNA gene profiling. Together, these results indicate that fungal–bacterial synergies may support bacterial resilience to moisture limitation.

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Section: Introductionmentioning

confidence: 99%

Plant-associated fungi support bacterial resilience following water limitation

et al. 2022

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“…The growth of rice seedlings in terms of shoot length (cm), root length (cm), and biomass (g) was improved by strains TI04 and TI15. Moreover, the microbial community, nutrients, and soil texture all have an impact on Serendipita indica colonization ( Dias et al, 2020 ). In our study, Trichoderma spores with degraded leaves enhanced SI mycorrhizae’s root association.…”

Section: Discussionmentioning

confidence: 99%

A bio-sustainable approach for reducing Eucalyptus tree-caused agricultural ecosystem hazards employing Trichoderma bio-sustained spores and mycorrhizal networks

et al. 2023

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The presence of the exotic Eucalyptus tree in crop-growing soil and the accumulation of its undecomposed leaves is a significant ecological hazard. The waxy coating on the leaves and the phenolic compounds takes a long time to break down under normal conditions. It is necessary to explore various fungi that can degrade these leaves for an eco-friendly solution to this problem. In this study, spores of nine native Trichoderma strains were produced on wheat agar using a lactic acid-induced sporulation strategy (LAISS). Trichoderma biosustained spores and Serendipita indica (SI) spores were applied to a rice field with accumulated Eucalyptus leaves under continuous ponding (CP) and alternate flooding and wetting conditions (AFW). Among the strains, TI04 (Trichoderma viride) and TI15 (Trichoderma citrinoviride) showed faster (5 days) and massive sporulation (1.06–1.38 × 1011 CFU/g) in LAISS. In vitro, TI04 and TI15 biosustained on Eucalyptus leaves and improved rice seedling growth and SI infection under greenhouse conditions. In the rice-field experiment, Trichoderma-treatment had a threefold yield (percentage) increase from control, with TI04 (CP) increasing the yield by 30.79, TI04 (AFW) by 29.45, TI15 (CP) by 32.72, and TI15 (AFW) rising by 31.91. Remarkably, unfilled grain yield significantly decreased in all the Trichoderma treatments. Under AFW conditions, TI04 and TI15 showed a higher pH increase. Furthermore, TI04 and TI15 under AFW had higher water productivity (t ha−1 cm−1) of 0.0763 and 0.0791, respectively, and the highest rates (percentage) of SI colonization of 86.36 and 83.16, respectively. According to the findings, LAISS-produced Trichoderma spores can be applied to break down persistent wastes and restore agricultural ecosystems through increased mycorrhizae networking.

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“…Variation in plant-microbiome composition across sites and time [86] and functional redundancy in the microbial community will allow host selection on microbiome function rather than taxa per se [97]. Considering microbiome recruitment as a symbiotic model on plant-soil ecology and adaptation [98] would allow the application of this knowledge in biofertilizer design and production [4,99].…”

Section: Nature-based Solutions For Better Nuementioning

confidence: 99%

“…The switch from hunting to farming, with the use and spread of domesticated grains [2], was a social change that triggered a positive feedback where the increased availability of food created the need for more reliable and constant crop yields. This positive feedback was maintained until the present day and will be stronger due to the current human population growth and consumption patterns [3,4]. Achieving food security and sustainability is very much dependent on our understanding of plant nutrition.…”

Section: Introductionmentioning

confidence: 99%

Integrating Ecological Principles for Addressing Plant Production Security and Move beyond the Dichotomy ‘Good or Bad’ for Nitrogen Inputs Choice

2022

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Mankind’s strong dependence on nitrogen (N) began when we started farming and, ever since, we have depended on nitrogen in the soil for plant production. More than a century has passed since the discovery of N as an element until the advent of synthetic fertilizers. Today, after a century of Haber–Bosch innovation, many other endeavors and challenges can be launched to understand how the effects of N in the environment can be perceived as ‘good’ or ‘bad’. All this knowledge evolution was truly dependent on the scientific advances, both technological and methodological, and particularly on the approaches at the micro and macro level. As with nearly everything in our lives (e.g., events, people, food, decisions, world history), we tend to use the dichotomy ‘good or bad’ to categorize, and scientific advances are no exception. The integration of scientific and technological advances allows us to move beyond this simple dichotomy ‘good or bad’ and to make choices. Here, we review the main marks in understanding plant nutrition throughout time, with special emphasis on N, from the Greeks to the most recent trends in the 21st century. Since improving plant N use efficiency is a main avenue to meet several Sustainable Developmental Goals (e.g., SDG2 zero hunger, SDG12 responsible production and consumption, SDG15 life on land), the European Green Deal, and The Farm to Fork strategy, we propose that the ecological principles must be integrated in agro-ecosystem management. During the last 40 years, our research group has contributed to: (i) the clarification of the so-called dichotomy of choices when it comes to the environmental effects of N; and (ii) fetching natural solutions for N manmade problems. This was based on the knowledge that life is a continuous symbiotic interplay between mutualism and parasitism depending on environmental conditions and that there is a need for feeding people, assuring food quality and diminishing environmental impacts. We argue that, as a society, we have the scientific and technological means to learn from nature and to apply the ecological rules in agro-ecosystems. However, this is a choice we must make as individuals and as a society.

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The Free-Living Stage Growth Conditions of the Endophytic Fungus Serendipita indica May Regulate Its Potential as Plant Growth Promoting Microbe

Cited by 15 publications

References 70 publications

Plant-associated fungi support bacterial resilience following water limitation

Plant-associated fungi support bacterial resilience following water limitation

A bio-sustainable approach for reducing Eucalyptus tree-caused agricultural ecosystem hazards employing Trichoderma bio-sustained spores and mycorrhizal networks

Integrating Ecological Principles for Addressing Plant Production Security and Move beyond the Dichotomy ‘Good or Bad’ for Nitrogen Inputs Choice

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