Causes and Consequences of Condensed Tannin Variation in<i>Populus</i>

Rubert‐Nason, Kennedy F.; Lindroth, Richard L.

doi:10.1002/9781119545958.ch4

Cited by 11 publications

(8 citation statements)

References 187 publications

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“…Tannin buildup caused by stress may indicate that tannins have extra functions in vegetative tissue, including leaves. This is especially true for P. tremuloides , where leaf CT levels improve after injury and insect herbivory ( Rubert-Nason and Lindroth, 2021 ). According to molecular analysis, these increments are the consequence of fast transcriptional activation of the whole CT biosynthetic path in response to stress, and the PtMYB 134 transcription factor plays a major role in this activation ( James et al., 2017 ).…”

Section: Tanninsmentioning

confidence: 99%

Reinforcing the bulwark: unravelling the efficient applications of plant phenolics and tannins against environmental stresses

Dehghanian

Habibi

Dehghanian

et al. 2022

Heliyon

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Section: Tanninsmentioning

confidence: 99%

Reinforcing the bulwark: unravelling the efficient applications of plant phenolics and tannins against environmental stresses

Dehghanian

Habibi

Dehghanian

et al. 2022

Heliyon

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“…Aspen is a highly regenerative and fast-growing early succession deciduous tree ( Kassfeldt, 2009 ) that is rich in phenolic defense compounds including condensed tannins (CTs), which are considered mediators of stress tolerance ( Ullah et al., 2017 ; Harding, 2019 ). Condensed tannins are bioactive phenolic polymers that vary in concentration with both biotic and abiotic factors including season, exposure, and host age ( Rubert-Nason and Lindroth, 2021 ). Moreover, recent studies point at fast responses in tannin concentrations in response to fungal infestation ( Ullah et al., 2019 ; Chowdhury et al., 2023 ).…”

Section: Introductionmentioning

confidence: 99%

Molecular studies of rust on European aspen suggest an autochthonous relationship shaped by genotype

Siddique

Menke²,

Dinedurga³

et al. 2023

Front. Plant Sci.

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Forests are at increasing risk from pathogen outbreak. Climate change for example enhance the risk of local disease outbreaks, and naturalization of exotic pathogens may follow human activities, warranting robust pest surveillance routines to support forest management. Melampsora pinitorqua (pine twisting rust) is of concern in Swedish forestry, and here we evaluate the use of visible rust scores (VRS) on its obligate summer host, European aspen (Populus tremula) as a tool for quantification of the pathogen. With use of species-specific primers, we could detect the native rust, but we failed to detect two exotic rusts (M. medusae and M. larici-populina). We found that aspen genotype determined the presence of fungal genetic markers (amplifying the ITS2 region of the fungal rDNA sequence) as well as DNA sequences specific to M. pinitorqua. We correlated VRS with the amount of fungal DNA in the same leaf, and we related the findings to aspen genotype-specific parameters such as the ability to synthesize and store leaf condensed tannins (CT). At the genotype level both positive and negative relationships were observed between CTs, fungal markers, and rust infestations. However, at the population level, foliar CT concentrations correlated negatively with general fungal- and rust-specific marker abundances. Our results, therefore, do not support the use of VRS to assess Melampsora infestation in Aspen. They do, however, suggest that the relationship between European aspen and rust infestation may be characterized as autochthonous in northern Sweden.

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“…Aspens are deciduous, early succession trees that are widely distributed in forests of the Northern hemisphere (Rogers et al, 2019 ). Aspen trees have also been used as models in studies of intraspecific differences in defence chemistry (Häikiö et al, 2009 ; Hartikainen et al, 2009 ; Keefover‐Ring et al, 2014 ; Lindroth & Hwang, 1996 ; Rubert‐Nason & Lindroth, 2021 ), inter‐ and intraspecific variation in defence genes (Bernhardsson et al, 2013 ; Wang et al, 2016a , 2016b , 2020 ), environmental modulation of metabolic priorities (Bandau et al, 2015 , 2021 ; Cole et al, 2021 ; Cope et al, 2021 ; Decker et al, 2017 ; Dettlaff et al, 2018 ; Gaur et al, 2022 ), and molecular mechanisms involved in induced defence responses (Barbehenn & Peter Constabel, 2011 ; Barrios‐San Martín et al, 2014 ; Ramírez et al, 2004 ; Ullah et al, 2018 , 2019 ). They are also regarded as strong foundation species in temperate and boreal forests (Cole et al, 2021 ), hosting genotype‐specific communities of arthropods (Barker et al, 2019 ; Robinson et al, 2012 ), and pathogens (Albrectsen et al, 2010 ; Bandau et al, 2015 ; von Bargen et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

“…CTs in Populus spp. have mainly been associated with defences against microorganisms, such as endophytic fungi (Bailey et al, 2005 ) and fungal pathogens (Bandau et al, 2021 ; Ullah et al, 2018 , 2019 ), but studies also suggest they impair arthropod chewing performance (Barbehenn & Peter Constabel, 2011 ; Rubert‐Nason & Lindroth, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of condensed tannins on behavior and performance of a specialist aphid on aspen

Rodríguez

Kloth

Albrectsen

2022

Ecology and Evolution

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Genes involved in plant defences against herbivores and pathogens are often highly polymorphic. This is a putative sign that balancing selection may have operated reciprocally on the hosts and their herbivores. Spatial and temporal variations (for example, in soil nutrients and the plants' ontogenetic development) may also modulate resistance traits, and thus selection pressures, but have been largely overlooked in theories of plant defences. Important elements of defences in Populus tremula (hereafter aspen) are phenolic compounds, including condensed tannins (CTs). Concentrations of CTs vary considerably with both variations in external factors and time, but they are also believed to provide genotype‐dependent resistance, mainly against chewing herbivores and pathogens. However, evidence of their contributions to resistance is sparse. Detailed studies of co‐evolved plant–herbivore associations could provide valuable insights into these contributions. Therefore, we examined correlations between CT levels in aspen leaves and both the feeding behavior and reproduction of the specialist aspen leaf aphid ( Chaitophorus tremulae ) in varied conditions. We found that xylem sap intake and probing difficulties were higher on genotypes with high‐CT concentrations. However, aphids engaged in more nonprobing activities on low‐CT genotypes, indicating that CTs were not the only defence traits involved. Thus, high‐CT genotypes were not necessarily more resistant than low‐CT genotypes, but aphid reproduction was generally negatively correlated with local CT accumulation. Genotype‐specific resistance ranking also depended on the experimental conditions. These results support the hypothesis that growth conditions may affect selection pressures mediated by aphids in accordance with balancing selection theory.

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Causes and Consequences of Condensed Tannin Variation inPopulus

Cited by 11 publications

References 187 publications

Reinforcing the bulwark: unravelling the efficient applications of plant phenolics and tannins against environmental stresses

Reinforcing the bulwark: unravelling the efficient applications of plant phenolics and tannins against environmental stresses

Molecular studies of rust on European aspen suggest an autochthonous relationship shaped by genotype

Effects of condensed tannins on behavior and performance of a specialist aphid on aspen

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