Natural or light-induced pigment accumulation in grain amaranths coincides with enhanced resistance against insect herbivory

Portillo-Nava, Claudia; Esperanza, Moisés Guerrero; Guerrero‐Rangel, Armando; Guevara-Domínguez, Paulina; Martínez‐Gallardo, Norma; Nava-Sandoval, Cecilia; Ordaz-Ortíz, José Juan; Sánchez-Segura, Lino; Délano‐Frier, John Paul

doi:10.1007/s00425-021-03757-3

Cited by 4 publications

(3 citation statements)

References 75 publications

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“…Later, betanin is acylated or glycosylated to form different kinds of betacyanins (Strack et al., 2003). Betalain serves a crucial role in not only providing photoprotection, salt resistance, and oxidation resistance (Portillo‐Nava et al., 2021; Sigwela et al., 2021; Zhou, Karl, et al., 2021), but also acts as an essential pigment in attracting pollination by insects (Suzuki et al., 2014). Betalain contains red‐violet betacyanin and yellow betaxanthin.…”

Section: Introductionmentioning

confidence: 99%

Integrated metabolome, full‐length sequencing, and transcriptome analyses unveil the molecular mechanisms of color formation of the canary yellow and red bracts of Bougainvillea × buttiana ‘Chitra’

Kang,

Li,

Zhang

et al. 2023

The Plant Journal

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SUMMARYBougainvillea is a typical tropical flower of great ornamental value due to its colorful bracts. The molecular mechanism behind color formation is not well‐understood. Therefore, this research conducted metabolome analysis, transcriptome analysis, and multi‐flux full‐length sequencing in two color bracts of Bougainvillea × buttiana ‘Chitra’ to investigate the significantly different metabolites (SDMs) and differentially expressed genes (DEGs). Overall, 261 SDMs, including 62 flavonoids and 26 alkaloids, were detected, and flavonols and betalains were significantly differentially accumulated among the two bracts. Furthermore, the complete‐length transcriptome of Bougainvillea × buttiana was also developed, which contained 512 493 non‐redundant isoforms. Among them, 341 210 (66.58%) displayed multiple annotations in the KOG, GO, NR, KEGG, Pfam, Swissprot, and NT databases. RNA‐seq findings revealed that 3610 DEGs were identified between two bracts. Co‐expression analysis demonstrated that the DEGs and SDMs involved in flavonol metabolism (such as CHS, CHI, F3H, FLS, CYP75B1, kaempferol, and quercetin) and betacyanin metabolism (DODA, betanidin, and betacyanins) were the main contributors for the canary yellow and red bract formation, respectively. Further investigation revealed that several putative transcription factors (TFs) might interact with the promoters of the genes mentioned above. The expression profiles of the putative TFs displayed that they may positively and negatively regulate the structural genes' expression profiles. The data revealed a potential regulatory network between important genes, putative TFs, and metabolites in the flavonol and betacyanin biosynthesis of Bougainvillea × buttiana ‘Chitra’ bracts. These findings will serve as a rich genetic resource for future studies that could create new color bracts.

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Section: Introductionmentioning

confidence: 99%

Integrated metabolome, full‐length sequencing, and transcriptome analyses unveil the molecular mechanisms of color formation of the canary yellow and red bracts of Bougainvillea × buttiana ‘Chitra’

Kang,

Li,

Zhang

et al. 2023

The Plant Journal

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“…The methods used were described previously by Cabrales-Orona et al. (2022) and Portillo-Nava et al. (2021) .…”

Section: Methodsmentioning

confidence: 99%

“…Several biochemical parameters were analyzed in grain amaranth plants subjected to HS and recovery treatments. The methods used were described previously by Cabrales-Orona et al (2022) and Portillo-Nava et al (2021). These included the following: total betalains, carotenes and chlorophyll; soluble and insoluble nonstructural carbohydrates (NSCs) and Pro levels and total phenols and flavonoids.…”

Section: Measurement Of Biochemical Parametersmentioning

confidence: 99%

Identification of genetic and biochemical mechanisms associated with heat shock and heat stress adaptation in grain amaranths

Reyes-Rosales

Cabrales-Orona²,

Martínez‐Gallardo³

et al. 2023

Front. Plant Sci.

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Heat stress is poised to become a major factor negatively affecting plant performance worldwide. In terms of world food security, increased ambient temperatures are poised to reduce yields in cereals and other economically important crops. Grain amaranths are known to be productive under poor and/or unfavorable growing conditions that significantly affect cereals and other crops. Several physiological and biochemical attributes have been recognized to contribute to this favorable property, including a high water-use efficiency and the activation of a carbon starvation response. This study reports the behavior of the three grain amaranth species to two different stress conditions: short-term exposure to heat shock (HS) conditions using young plants kept in a conditioned growth chamber or long-term cultivation under severe heat stress in greenhouse conditions. The latter involved exposing grain amaranth plants to daylight temperatures that hovered around 50°C, or above, for at least 4 h during the day and to higher than normal nocturnal temperatures for a complete growth cycle in the summer of 2022 in central Mexico. All grain amaranth species showed a high tolerance to HS, demonstrated by a high percentage of recovery after their return to optimal growing conditions. The tolerance observed coincided with increased expression levels of unknown function genes previously shown to be induced by other (a)biotic stress conditions. Included among them were genes coding for RNA-binding and RNA-editing proteins, respectively. HS tolerance was also in accordance with favorable changes in several biochemical parameters usually induced in plants in response to abiotic stresses. Conversely, exposure to a prolonged severe heat stress seriously affected the vegetative and reproductive development of all three grain amaranth species, which yielded little or no seed. The latter data suggested that the usually stress-tolerant grain amaranths are unable to overcome severe heat stress-related damage leading to reproductive failure.

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Polyphenol contents in amaranth cultivars and their relationship with insect feeding deterrence

Niveyro,

Salvo,

Laursen

et al. 2023

Arthropod-Plant Interactions

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Natural or light-induced pigment accumulation in grain amaranths coincides with enhanced resistance against insect herbivory

Cited by 4 publications

References 75 publications

Integrated metabolome, full‐length sequencing, and transcriptome analyses unveil the molecular mechanisms of color formation of the canary yellow and red bracts of Bougainvillea × buttiana ‘Chitra’

Integrated metabolome, full‐length sequencing, and transcriptome analyses unveil the molecular mechanisms of color formation of the canary yellow and red bracts of Bougainvillea × buttiana ‘Chitra’

Identification of genetic and biochemical mechanisms associated with heat shock and heat stress adaptation in grain amaranths

Polyphenol contents in amaranth cultivars and their relationship with insect feeding deterrence

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