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Article: The Chemical Ecology of Benzoxazinoids.

Robert, Christelle Aurélie Maud / Mateo, Pierre

2022 Volume 76, Issue 11, Page(s) 928–938

Abstract: Benzoxazinoids are specialized metabolites that modulate plant physiology and plant interactions with their environment. In this review, we synthesize their multiple functions and ecological relevance. We first provide an overview of benzoxazinoid ... ...

Abstract	Benzoxazinoids are specialized metabolites that modulate plant physiology and plant interactions with their environment. In this review, we synthesize their multiple functions and ecological relevance. We first provide an overview of benzoxazinoid biosynthesis and highlight known regulatory elements involved in modulating their production. We then outline the role of benzoxazinoids in plant nutrition, vegetative and reproductive growth, and defense. We further summarize benzoxazinoid response to environmental factors such as temperature, drought, CO2, light, or nutrient levels and emphasize their potential role in tolerating abiotic stresses. Finally, we argue that benzoxazinoids act as a strong selective force on different trophic levels by shaping the plant interactions with microbes, insect herbivores, and competitor plants. Understanding the pivotal role of benzoxazinoids in plant biology is crucial to apprehend their impact on (agro)ecosystem functioning and diversity.
MeSH term(s)	Ecosystem ; Benzoxazines/metabolism ; Plants/metabolism ; Herbivory
Chemical Substances	Benzoxazines
Language	English
Publishing date	2022-11-30
Publishing country	Switzerland
Document type	Review ; Journal Article
ZDB-ID	1516-7
ISSN	0009-4293
ISSN	0009-4293
DOI	10.2533/chimia.2022.928
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Article ; Online: Effects of lexical skills and orthographic neighborhood size in word memory.

Ballot, Claire / Robert, Christelle / Dujardin, Emilie / Mathey, Stéphanie

Memory & cognition

2023 Volume 52, Issue 3, Page(s) 610–621

Abstract: Two experiments were designed to investigate the relationship between individual lexical skills in young adults and memory performance on words varying by their orthographic neighborhood size. In Experiment 1, a sample of 100 university students were ... ...

Abstract	Two experiments were designed to investigate the relationship between individual lexical skills in young adults and memory performance on words varying by their orthographic neighborhood size. In Experiment 1, a sample of 100 university students were administrated a set of spelling, reading, and vocabulary tests to assess their lexical skills. Then, they had to learn mixed lists of words from high and low neighborhood size and perform free recall and memory recognition tasks. Importantly, high lexical skills were found to enhance free recall and, to a lesser extent, recognition. In addition, a typical mirror effect of neighborhood size was found in recognition as words were better recognized and also produced less false alarms when they had a low neighborhood size. In Experiment 2, pure lists of words were designed and a new sample of 90 university students was assessed. We replicated the effect of lexical skills in free recall and the effect of neighborhood size for hits in recognition. Spelling skills were found to interact with neighborhood size in free recall in that low spelling skills were associated with a facilitatory effect of neighborhood size. In recognition, a relation between reading skills and neighborhood size was found such that the higher the reading skills, the higher was the inhibitory effect of neighborhood size. These results provide new evidence of an influence of lexical skills in word memory performance and underline the role of orthographic neighborhood size in episodic memory tasks.
MeSH term(s)	Young Adult ; Humans ; Memory ; Mental Recall ; Recognition, Psychology ; Language ; Cognition ; Reading
Language	English
Publishing date	2023-11-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	185691-1
ISSN	1532-5946 ; 0090-502X
ISSN (online)	1532-5946
ISSN	0090-502X
DOI	10.3758/s13421-023-01487-3
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Article ; Online: Is the approach avoidance compatibility effect moderated by word imageability?

Pillaud, Nicolas / Ballot, Claire / Robert, Christelle / Mathey, Stéphanie / Ric, François

Quarterly journal of experimental psychology (2006)

2023 , Page(s) 17470218231194499

Abstract: The approach/avoidance (AA) compatibility effect refers to the fact that individuals respond faster by an approach movement to positive than to negative stimuli, whereas they respond faster by an avoidance movement to negative than to positive stimuli. ... ...

Abstract	The approach/avoidance (AA) compatibility effect refers to the fact that individuals respond faster by an approach movement to positive than to negative stimuli, whereas they respond faster by an avoidance movement to negative than to positive stimuli. Although this effect has been observed in many studies, the underlying mechanisms remain still unclear. On the basis of recent studies suggesting a key role of sensorimotor information in the emergence of the AA compatibility effect, the present study aimed to investigate the specific role of visual information, operationalised through word imageability, in the production of the AA compatibility effect. We orthogonally manipulated the emotional valence (positive/negative) and the imageability (low/high) of words in an incidental online-AA task (i.e., in the absence of valence processing goals) using a stimulus onset asynchrony (SOA) of 300 ms. In line with previous studies, Experiment 1 revealed an AA compatibility effect in the absence of valence processing goals. However, this effect was not moderated by word imageability. In Experiment 2, we examined whether the absence of influence of word imageability could be due to the short SOA (300 ms) used in this experiment. We used the same design as in Experiment 1 and manipulated the SOA (400 vs 600 ms). We again observed an AA compatibility effect which was not moderated by word imageability, whatever the SOA used. The results of both experiments suggest the absence of any influence of sensorimotor information in the AA compatibility effect, at least when provided by the to-be-approached/avoided stimulus.
Language	English
Publishing date	2023-08-30
Publishing country	England
Document type	Journal Article
ZDB-ID	219170-2
ISSN	1747-0226 ; 0033-555X ; 1747-0218
ISSN (online)	1747-0226
ISSN	0033-555X ; 1747-0218
DOI	10.1177/17470218231194499
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Article ; Online: Word imageability influences the emotionality effect in episodic memory.

Ballot, Claire / Robert, Christelle / Mathey, Stéphanie

Cognitive processing

2022 Volume 23, Issue 4, Page(s) 655–660

Abstract: This study examines how and to what extent imageability influences the effect of word emotionality in episodic memory. A total of 52 young adults successively performed a free recall task and a recognition task in which word emotionality and imageability ...

Abstract	This study examines how and to what extent imageability influences the effect of word emotionality in episodic memory. A total of 52 young adults successively performed a free recall task and a recognition task in which word emotionality and imageability were orthogonally manipulated across six conditions of French words: low-imageability positive words (e.g., éloge [praise]), low-imageability negative words (e.g., viral [viral]), low-imageability neutral words (e.g., global [global]), high-imageability positive words (e.g., ourson [teddy]), high-imageability negative words (e.g., tornade [tornado]), and low-imageability neutral words (e.g., noyau [core]). The results from both the recall and the recognition memory tasks show that word imageability enhances memory performance. Importantly, word imageability interacted with word emotionality in both tasks. Specifically, we found that the advantage of emotional over neutral words in episodic memory performance emerged for high-imageability words only, as did the advantage of positive over negative words. These results highlight the role of imageability in the mechanisms underlying emotional word episodic memory.
MeSH term(s)	Humans ; Memory, Episodic ; Mental Recall ; Recognition, Psychology ; Semantics ; Young Adult
Language	English
Publishing date	2022-07-20
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2075054-7
ISSN	1612-4790 ; 1612-4782
ISSN (online)	1612-4790
ISSN	1612-4782
DOI	10.1007/s10339-022-01102-4
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Article: Using plant chemistry to improve interactions between plants, herbivores and their natural enemies: challenges and opportunities

Erb, Matthias / Züst, Tobias / Robert, Christelle Aurélie Maud

Current opinion in biotechnology. 2021 Aug., v. 70

2021

Abstract: Plant secondary (or specialized) metabolites determine multitrophic interaction dynamics. Herbivore natural enemies exploit plant volatiles for host location and are negatively affected by plant defense chemicals that are transferred through herbivores. ... ...

Abstract	Plant secondary (or specialized) metabolites determine multitrophic interaction dynamics. Herbivore natural enemies exploit plant volatiles for host location and are negatively affected by plant defense chemicals that are transferred through herbivores. Recent work shows that herbivore natural enemies can evolve resistance to plant defense chemicals, and that generating plant defense resistance through forward evolution enhances their capacity to prey on herbivores. Here, we discuss how this knowledge can be used to engineer better biocontrol agents. We argue that herbivore natural enemies which are adapted to plant chemistry will likely enhance the efficacy of future pest control efforts. Detailed phenotyping and field experiments will be necessary to quantify costs and benefits of optimizing chemical links between plants and higher trophic levels.
Keywords	biological control ; biotechnology ; evolution ; herbivores ; metabolites ; pest control ; phenotype ; plant biochemistry
Language	English
Dates of publication	2021-08
Size	p. 262-265.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	1052045-4
ISSN	1879-0429 ; 0958-1669
ISSN (online)	1879-0429
ISSN	0958-1669
DOI	10.1016/j.copbio.2021.05.011
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Age-related positivity effect: Distinct mechanisms for lexical access and episodic memory of emotional words.

Laulan, Pierrick / Catheline, Gwénaëlle / Mayo, Willy / Robert, Christelle / Mathey, Stéphanie

Psychology and aging

2022 Volume 37, Issue 8, Page(s) 913–928

Abstract: The age-related positivity effect is the tendency of older adults to preferentially process positive information over negative information when compared to younger adults (e.g., Reed & Carstensen, 2012). The aim of the study was to determine whether ... ...

Abstract	The age-related positivity effect is the tendency of older adults to preferentially process positive information over negative information when compared to younger adults (e.g., Reed & Carstensen, 2012). The aim of the study was to determine whether common and/or distinct mechanisms underlie the age-related positivity effect in lexical access and episodic memory. Fifty young and 50 older adults successively performed a progressive demasking task incorporating memory instructions, an immediate free recall task, a memory recognition task, and delayed free recalls at 20 min and 7 days. The materials included 60 words that varied in emotional valence (positive, neutral, negative) and arousal (low, high). The results revealed that distinct processes underlie the age-related positivity effect in lexical access and episodic memory. In progressive demasking, this effect emerged for both low- and high-arousal words, suggesting that it depends on automatic processes. In immediate and delayed free recall and recognition, this effect emerged for low-arousal words only, suggesting that it depends on more controlled processes. Moreover, in older adults, positivity scores correlated with well-being scores for episodic memory. These results are discussed in relation to affective aging theories. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
MeSH term(s)	Humans ; Aged ; Memory, Episodic ; Aging/psychology ; Emotions ; Recognition, Psychology ; Memory, Short-Term
Language	English
Publishing date	2022-09-29
Publishing country	United States
Document type	Journal Article
ZDB-ID	635596-1
ISSN	1939-1498 ; 0882-7974
ISSN (online)	1939-1498
ISSN	0882-7974
DOI	10.1037/pag0000709
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Article ; Online: Word imageability and orthographic neighbourhood effects on memory: a study in free recall and recognition.

Ballot, Claire / Mathey, Stéphanie / Robert, Christelle

Memory (Hove, England)

2021 Volume 29, Issue 6, Page(s) 829–834

Abstract: This study investigated the effects of word imageability and orthographic neighbourhood size, as well as their combined effects, in free recall and recognition memory. A total of 45 young adults performed recall and recognition tasks on the same word ... ...

Abstract	This study investigated the effects of word imageability and orthographic neighbourhood size, as well as their combined effects, in free recall and recognition memory. A total of 45 young adults performed recall and recognition tasks on the same word materials. Word imageability and orthographic neighbourhood size were orthogonally manipulated across four word conditions: low-imageability words - high
MeSH term(s)	Cognition ; Humans ; Mental Recall ; Recognition, Psychology ; Semantics ; Young Adult
Language	English
Publishing date	2021-04-28
Publishing country	England
Document type	Journal Article
ZDB-ID	1147478-6
ISSN	1464-0686 ; 0965-8211
ISSN (online)	1464-0686
ISSN	0965-8211
DOI	10.1080/09658211.2021.1921216
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Article ; Online: Age-related evaluations of imageability and subjective frequency for 1286 neutral and emotional French words: ratings by young, middle-aged, and older adults.

Ballot, Claire / Mathey, Stéphanie / Robert, Christelle

Behavior research methods

2021 Volume 54, Issue 1, Page(s) 196–215

Abstract: This study aimed at providing imageability and subjective frequency ratings collected from four adult age groups ranging from 18 to 85 years old (18-25; 26-39; 40-59; and 60 and over) for 1286 neutral and emotional French words available in the EMA ... ...

Abstract	This study aimed at providing imageability and subjective frequency ratings collected from four adult age groups ranging from 18 to 85 years old (18-25; 26-39; 40-59; and 60 and over) for 1286 neutral and emotional French words available in the EMA database (Gobin et al., 2017). Overall, the older adults rated words as more (subjectively) frequent and more imageable than the younger adults. Furthermore, we examined the relationships between subjective frequency and imageability, as well as those with emotional variables (i.e., valence, arousal) already available for these words, for each age group. For all age groups, more subjective frequent words were more imageable. Emotional words were more imageable and more frequent. Arousal scores were lower for low- and high-imageability words, and higher for more subjective frequent words. The strength of these links between subjective frequency, imageability, and emotional ratings was found to decrease as a function of age. Finally, by using the lexical decision reaction times and accuracy rates of young adults from Megalex (Ferrand et al., 2018), imageability and subjective frequency across age were found to provide an additional contribution to visual word recognition performance as compared to objective lexical variables (i.e., number of letters, syllables, objective frequency, orthographic neighborhood). More importantly, subjective frequency and imageability ratings from the youngest group predicted reaction times and accuracy better than ratings from the oldest group. By providing new age-adapted word characteristics, this norm should be of great use to researchers in the field of cognitive aging who use word materials.
MeSH term(s)	Adolescent ; Adult ; Aged ; Aged, 80 and over ; Arousal ; Databases, Factual ; Emotions ; Humans ; Middle Aged ; Psycholinguistics ; Reaction Time ; Young Adult
Language	English
Publishing date	2021-06-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	231560-9
ISSN	1554-3528 ; 0743-3808 ; 1554-351X
ISSN (online)	1554-3528
ISSN	0743-3808 ; 1554-351X
DOI	10.3758/s13428-021-01621-6
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Article ; Online: Isolation and Structure Determination of Drought-Induced Multihexose Benzoxazinoids from Maize (

Sutour, Sylvain / Doan, Van Cong / Mateo, Pierre / Züst, Tobias / Hartmann, Ella Raymonde / Glauser, Gaétan / Robert, Christelle Aurélie Maud

Journal of agricultural and food chemistry

2024 Volume 72, Issue 7, Page(s) 3427–3435

Abstract: Benzoxazinoids (BXDs) are plant specialized metabolites exerting a pivotal role in plant nutrition, allelopathy, and defenses. Multihexose benzoxazinoids were previously observed in cereal-based food products such as whole-grain bread. However, their ... ...

Abstract	Benzoxazinoids (BXDs) are plant specialized metabolites exerting a pivotal role in plant nutrition, allelopathy, and defenses. Multihexose benzoxazinoids were previously observed in cereal-based food products such as whole-grain bread. However, their production in plants and exact structure have not been fully elucidated. In this study, we showed that drought induced the production of di-, tri-, and even tetrahexose BXDs in maize roots and leaves. We performed an extensive nuclear magnetic resonance study and elucidated the nature and linkage of the sugar units, which were identified as gentiobiose units β-linked (1″ → 6') for the dihexoses and (1″ → 6')/(1‴ → 6″) for the trihexoses. Drought induced the production of DIMBOA-2Glc, DIMBOA-3Glc, HMBOA-2Glc, HMBOA-3Glc, and HDMBOA-2Glc. The induction was common among several maize lines and the strongest in seven-day-old seedlings. This work provides ground to further characterize the BXD synthetic pathway, its relevance in maize-environment interactions, and its impact on human health.
MeSH term(s)	Humans ; Benzoxazines/metabolism ; Zea mays/chemistry ; Droughts ; Seedlings/metabolism ; Edible Grain/metabolism
Chemical Substances	Benzoxazines
Language	English
Publishing date	2024-02-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	241619-0
ISSN	1520-5118 ; 0021-8561
ISSN (online)	1520-5118
ISSN	0021-8561
DOI	10.1021/acs.jafc.3c09141
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Article ; Online: Using plant chemistry to improve interactions between plants, herbivores and their natural enemies: challenges and opportunities.

Erb, Matthias / Züst, Tobias / Robert, Christelle Aurélie Maud

Current opinion in biotechnology

2021 Volume 70, Page(s) 262–265

Abstract	Plant secondary (or specialized) metabolites determine multitrophic interaction dynamics. Herbivore natural enemies exploit plant volatiles for host location and are negatively affected by plant defense chemicals that are transferred through herbivores. Recent work shows that herbivore natural enemies can evolve resistance to plant defense chemicals, and that generating plant defense resistance through forward evolution enhances their capacity to prey on herbivores. Here, we discuss how this knowledge can be used to engineer better biocontrol agents. We argue that herbivore natural enemies which are adapted to plant chemistry will likely enhance the efficacy of future pest control efforts. Detailed phenotyping and field experiments will be necessary to quantify costs and benefits of optimizing chemical links between plants and higher trophic levels.
MeSH term(s)	Food Chain ; Herbivory ; Plants
Language	English
Publishing date	2021-07-06
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	1052045-4
ISSN	1879-0429 ; 0958-1669
ISSN (online)	1879-0429
ISSN	0958-1669
DOI	10.1016/j.copbio.2021.05.011
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