Plant trichomes and a single gene<i>GLABRA1</i>contribute to insect community composition on field-grown<i>Arabidopsis thaliana</i>

Sato, Yasuhiro; Shimizu‐Inatsugi, Rie; Yamazaki, Misako; Shimizu, Kentaro; Nagano, Atsushi J.

doi:10.1101/320903

Cited by 7 publications

(14 citation statements)

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“…A single origin of malpighiaceous and stellate trichomes is also not supported by our and others’ data 27 , which could be attributed to the complex genetic control of trichome development 47 . Trichome types have not been studied in the context of family-wide diversification rates and species richness, and thougha selective advantage has been discussed 48 , there may also be fitness costs depending on environmental conditions 49 . In contrast, another trichome character (B03, multicellular glandular hairs) was indeed phylogenetically constrained, both regarding disparity and character occurrence.…”

Section: Discussionmentioning

confidence: 99%

Nested whole-genome duplications coincide with diversification and high morphological disparity in Brassicaceae

et al. 2020

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Angiosperms have become the dominant terrestrial plant group by diversifying for~145 million years into a broad range of environments. During the course of evolution, numerous morphological innovations arose, often preceded by whole genome duplications (WGD). The mustard family (Brassicaceae), a successful angiosperm clade with~4000 species, has been diversifying into many evolutionary lineages for more than 30 million years. Here we develop a species inventory, analyze morphological variation, and present a maternal, plastome-based genus-level phylogeny. We show that increased morphological disparity, despite an apparent absence of clade-specific morphological innovations, is found in tribes with WGDs or diversification rate shifts. Both are important processes in Brassicaceae, resulting in an overall high net diversification rate. Character states show frequent and independent gain and loss, and form varying combinations. Therefore, Brassicaceae pave the way to concepts of phylogenetic genome-wide association studies to analyze the evolution of morphological form and function.

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Section: Discussionmentioning

confidence: 99%

Nested whole-genome duplications coincide with diversification and high morphological disparity in Brassicaceae

et al. 2020

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“…All monitoring was conducted by a single observer during the daytime (08:00-17:00) for 3 weeks after the beginning of the field experiment to minimize variation. Details of insect abundance and diversity are reported in our previous publication (Sato et al 2018). In case wounding activated plant defense responses via JA signaling (e.g., Mewis et al 2005; Broekgaarden et al 2010; Matthes et al 2010), we did not sample any leaves until the end of the field experiment.…”

Section: Methodsmentioning

confidence: 99%

“…In wild populations, A. thaliana has multiple life-cycles within a calendar year (Thompson 1994; Wilczek et al 2009; Taylor et al 2017) and is attacked by various herbivores (Arany et al 2008; Harvey et al 2008; Sato et al 2018). Sato et al (2018) observed both flowering and vegetative A. thaliana co-occurring and being wounded by insect herbivores in a wild population near Zurich, Switzerland in summer. By simulating the summer cohort, our previous study found that 12 insect species, including mustard aphids Lipaphis erysimi (Homoptera), flea beetles Phyllotreta striolata and P atra.…”

Section: Introductionmentioning

confidence: 99%

“…By simulating the summer cohort, our previous study found that 12 insect species, including mustard aphids Lipaphis erysimi (Homoptera), flea beetles Phyllotreta striolata and P atra. (Coleoptera), diamondback moths Plutella xylostella (Lepidoptera), and the western flower thrips Frankliniella occidentalis (Thysanoptera), colonized A. thaliana and such an insect community composition significantly varied among A. thaliana accessions (Sato et al 2018). We also found that plant trichomes play a key role in altering the abundance of leaf chewing herbivores, but there were unclear correlations between insect abundance and laboratory-measured GSL profiles (Sato et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…(Coleoptera), diamondback moths Plutella xylostella (Lepidoptera), and the western flower thrips Frankliniella occidentalis (Thysanoptera), colonized A. thaliana and such an insect community composition significantly varied among A. thaliana accessions (Sato et al 2018). We also found that plant trichomes play a key role in altering the abundance of leaf chewing herbivores, but there were unclear correlations between insect abundance and laboratory-measured GSL profiles (Sato et al 2018). To link insect abundance and plant physiological status in the field, we employed transcriptomics, which were widely used to reveal comprehensive pictures of gene expression (Sun et al 2017; Xu et al 2018; Wang et al 2018; Lin et al 2018; Want et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Transcriptional variation in glucosinolate biosynthetic genes and inducible responses to aphid herbivory on field-grownArabidopsis thaliana

Sato

Tezuka

Kashima

et al. 2019

Preprint

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25Recently, increasing attempts have been made to understand how plant genes function in 26 natura studies. To determine whether plant defense genes are activated under multiple biotic 27 stimuli, we combined a high-throughput RNA-Seq with insect survey data on 19 accessions 28 of Arabidopsis thaliana growing on the field site of Switzerland. We found that genes with 29 GO annotations "glucosinolate biosynthetic process" and "response to insects" were the most 30 significantly enriched, exhibiting largely variable expression among plant accessions. Nearly 31 half of the total expression variation in glucosinolate biosynthetic genes, AOPs, ESM1, ESP, 32 and TGG1, was explained by among-accession variance. Combined with the field RNA-Seq 33 data, bioassays confirmed that AOP3 was up-regulated in response to the mustard aphid 34 Lipaphis erysimi. In addition, we also found that the expression of a major cis-jasmone 35 activated gene CYP81D11 was positively correlated with the number of the flea beetles 36 Phyllotreta spp. The combined results from RNA-Seq and insect surveys suggested that 37 plants can activate their defenses even when they are exposed to multiple biotic stimuli in 38 natura. 39

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Fatty Acid Desaturases in the Chloroplast and Endoplasmic Reticulum Promote Susceptibility to the Green Peach AphidMyzus persicaeinArabidopsis thaliana

Galla

Avila

et al. 2021

MPMI

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Fatty acid desaturases (FADs) in plants influence levels of susceptibility to multiple stresses, including insect infestations. In this study, infestations of the greAtFABen peach aphid (Myzus persicae) on Arabidopsis thaliana were reduced by mutations in three desaturases: FAB2/SSI2, which encodes a chloroplastic stearoyl-[acyl-carrier-protein] 9-desaturase, and AtFAD7 or AtFAD3, which encode ω-3 FADs in the chloroplast and endoplasmic reticulum (ER) respectively. These data indicate that certain FADs promote susceptibility to aphids, and that aphids are impacted by desaturases in both the chloroplast and ER. Aphid resistance in ssi2, fad3, and/or fad7 might involve altered signaling between these subcellular compartments. C18:1 levels are depleted in ssi2, whereas C18:2 accumulation is enhanced in fad3 and fad7. In contrast, fad8 has higher than normal C18:2 levels but also high C18:1 and low C18:0, and does not impact aphid numbers. Potentially, aphids may be influenced by the balance of multiple fatty acids (FAs) rather than by a single species, with C18:2 promoting aphid resistance and C18:1 promoting susceptibility. Although the fad7 mutant also accumulates higher-than-normal levels of C16:2, this FA does not contribute to aphid resistance because a triple mutant line that lacks detectable levels of C16:2 (fad2fad6fad7) retains comparable levels of aphid resistance as fad7. In addition, aphid numbers are unaffected by the fad5 mutation that inhibits C16:1 synthesis. Together, these results demonstrate that certain FADs are important susceptibility factors in plant-aphid interactions, and that aphid resistance is more strongly associated with differences in C18 abundance than C16 abundance.

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Plant trichomes and a single geneGLABRA1contribute to insect community composition on field-grownArabidopsis thaliana

Abstract: 25Background: Genetic variation in plants alters insect abundance and community structure in

Cited by 7 publications

References 78 publications

Nested whole-genome duplications coincide with diversification and high morphological disparity in Brassicaceae

Nested whole-genome duplications coincide with diversification and high morphological disparity in Brassicaceae

Transcriptional variation in glucosinolate biosynthetic genes and inducible responses to aphid herbivory on field-grownArabidopsis thaliana

Fatty Acid Desaturases in the Chloroplast and Endoplasmic Reticulum Promote Susceptibility to the Green Peach AphidMyzus persicaeinArabidopsis thaliana

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