Assessment of molecular and epigenetic changes in the albinism of Agave angustifolia Haw

Us-Camas, Rosa; Castillo-Castro, Eduardo; Aguilar‐Espinosa, Margarita; Limones-Briones, Verónica; Rivera‐Madrid, Renata; Robert-Díaz, Manuel L; De‐la‐Peña, Clelia

doi:10.1016/j.plantsci.2017.07.010

Cited by 20 publications

(13 citation statements)

References 116 publications

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“…Total or partial loss of photosynthetic pigments is an important reason for albinism in plants [74]. The albinism of leaves significantly affects photosynthesis.…”

Section: Discussionmentioning

confidence: 99%

Screening and characterization of long noncoding RNAs involved in the albinism of Ananas comosus var. bracteatus leaves

et al. 2019

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Long noncoding RNAs (lncRNAs) have been reported to play key regulatory roles in plant growth, development, and biotic and abiotic stress physiology. Revealing the mechanism of lncRNA regulation in the albino portions of leaves is important for understanding the development of chimeric leaves in Ananas comosus var. bracteatus. In this study, a total of 3,543 candidate lncRNAs were identified, among which 1,451 were differentially expressed between completely green (CGr) and completely white (CWh) leaves. LncRNAs tend to have shorter transcripts, lower expression levels, and greater expression specificity than protein-coding genes. Predicted lncRNA targets were functionally annotated by the Gene Ontology (GO), Clusters of Orthologous Groups (COG) and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases. A lncRNA-mRNA interaction network was constructed, and 36 target mRNAs related to chlorophyll metabolism were predicted to interact with 86 lncRNAs. Among these, 25 significantly differentially expressed lncRNAs putatively interacted with 16 target mRNAs. Based on an expression pattern analysis of the lncRNAs and their target mRNAs, the lncRNAs targeting magnesium chelatase subunit H (ChlH), protochlorophyllide oxidoreductase (POR), and heme o synthase (COX10) were suggested as key regulators of chlorophyll metabolism. This study provides the first lncRNA database for A. comosus var. bracteatus and contributes greatly to understanding the mechanism of epigenetic regulation of leaf albinism.

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“…Total or partial loss of photosynthetic pigments is an important reason for albinism in plants [74]. The albinism of leaves significantly affects photosynthesis.…”

Section: Discussionmentioning

confidence: 99%

Screening and characterization of long noncoding RNAs involved in the albinism of Ananas comosus var. bracteatus leaves

et al. 2019

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“…Using plant tissue culture techniques, her group established a large collection of almost genetically identical plants of this species with striking phenotypic variation: green plants (i.e., normal phenotype), albino plants (i.e., phenotype lacking photosynthetic and other pigments), and variegated plants (i.e., phenotype combining both normal and albino cells within the same plant). The three phenotypes differed markedly in terms of (1) density of some histone marks, (2) the expression of DNA methylases and in global DNA methylation levels, and (3) the expression of enzymes involved in histone modifications (Duarte‐Aké et al [2016] and Us‐Camas et al [2017] give more details.). De la Peña also reported pronounced decreases in global DNA methylation levels right before the transition from green to variegated and albino plants took place (Us‐Camas et al, 2017), and before reversion from variegated to green phenotypes.…”

Section: Epigenetic Regulation With Major Phenotypic Effectsmentioning

confidence: 99%

“…The three phenotypes differed markedly in terms of (1) density of some histone marks, (2) the expression of DNA methylases and in global DNA methylation levels, and (3) the expression of enzymes involved in histone modifications (Duarte‐Aké et al [2016] and Us‐Camas et al [2017] give more details.). De la Peña also reported pronounced decreases in global DNA methylation levels right before the transition from green to variegated and albino plants took place (Us‐Camas et al, 2017), and before reversion from variegated to green phenotypes. The A. angustifolia example illustrates how multiple interconnected epigenetic mechanisms have the potential to induce major heritable phenotypic changes.…”

Section: Epigenetic Regulation With Major Phenotypic Effectsmentioning

confidence: 99%

Plant epigenetics: phenotypic and functional diversity beyond the DNA sequence

Boquete

Muyle

Alonso

2021

American J of Botany

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Phenotypic variation determines the capacity of plants to adapt to changing environments and to colonize new habitats. Deciphering the mechanisms contributing to plant phenotypic variation and their effects on plant ecological interactions and evolutionary dynamics is thus central to all biological disciplines. In the past few decades, research on plant epigenetics is showing that (1) epigenetic variation is related to phenotypic variation and that some epigenetic marks drive major phenotypic changes in plants; (2) plant epigenomes are highly diverse, dynamic, and can respond rapidly to a variety of biotic and abiotic stimuli; (3) epigenetic variation can respond to selection and therefore play a role in adaptive evolution. Yet, current information in terms of species, geographic ranges, and ecological contexts analyzed so far is too limited to allow for generalizations about the relevance of epigenetic regulation in phenotypic innovation and plant adaptation across taxa. In this report, we contextualize the potential role of the epigenome in plant adaptation to the environment and describe the latest research in this field presented during the symposium “Plant epigenetics: phenotypic and functional diversity beyond the DNA sequence” held within the Botany 2020 conference framework in summer 2020.

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“…Bridging primers were then designed using Primer3 v. 4.0.0 197! (Untergasser, et al 2012). As a normalization control (i.e.…”

Section: !mentioning

confidence: 99%

Comparative transcriptomics of albino and warningly coloured caterpillars

Galarza

2018

Preprint

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Colouration is perhaps one of the most prominent adaptations for survival and reproduction of most taxa. Colouration is of particular importance for aposematic species, which rely on their colouring and patterning to act as a warning signal against predators. Most research has focused on the evolution of warning colouration by natural selection. However, little information is available for colour mutants of aposematic species, particularly at the genomic level. Here I compare the transcriptomes of albino mutant caterpillars of the wood tiger moth (Arctia plantaginis) to those of their full-sibs having their distinctive orange-black warning colouration. The results showed >300 differentially expressed genes transcriptome-wide. Genes involved in the immune system, structural constituents of cuticle, and peptidase activity were mostly down-regulated in the albino larvae. Surprisingly, higher expression was observed in core melanin genes from albino larvae, suggesting that melanin synthesis may be disrupted in terminal ends of the pathway during its final conversion. I further identified 25 novel genes uniquely expressed in the albino larvae. Functional annotation showed that these genes are involved in nucleotide biosynthesis, copper ion transmembrane transport, and nucleic acid binding. Taken together, these results suggest that caterpillar albinism may not be due to a depletion of melanin precursor genes. In contrast, the albino condition may result from the combination of faulty melanin conversion late in its synthesis and structural deficiencies in the cuticle preventing its deposition.

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Assessment of molecular and epigenetic changes in the albinism of Agave angustifolia Haw

Cited by 20 publications

References 116 publications

Screening and characterization of long noncoding RNAs involved in the albinism of Ananas comosus var. bracteatus leaves

Screening and characterization of long noncoding RNAs involved in the albinism of Ananas comosus var. bracteatus leaves

Plant epigenetics: phenotypic and functional diversity beyond the DNA sequence

Comparative transcriptomics of albino and warningly coloured caterpillars

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