Plant hormone signaling in flowering: An epigenetic point of view

Campos-Rivero, Gerardo; Osorio-Montalvo, Pedro; Sánchez-Borges, Rafael; Us-Camas, Rosa; Duarte-Aké, Fátima; De‐la‐Peña, Clelia

doi:10.1016/j.jplph.2017.03.018

Cited by 109 publications

(63 citation statements)

References 223 publications

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“…Transgenerational effects of the parental environment on offspring phenotype might also be caused by stress-induced epigenetic modifications of the offspring genome (Jablonka and Raz, 2009;Hauser et al, 2011;Herman and Sultan, 2011;Holeski et al, 2012). Epigenetic modifications, primarily DNA methylation and histone modifications, alter the patterns and magnitude of gene expression and are known to influence plant growth and reproduction (Pikaard and Scheid, 2014;Campos-Rivero et al, 2017), plant response to stress (Chinnusamy and Zhu, 2009;Thiebaut et al, 2019), and the transgenerational induction of plant defenses (Holeski et al, 2012). It is possible that epigenetic modifications of the plant genome contribute to the independent transgenerational impact of herbivory that we observed.…”

Section: Maternal Effects and Epigenetic Modifications May Contributementioning

confidence: 99%

“…Aside from maternal plant resource provisioning, epigenetic modifications have also been shown to play a role in the transgenerational response of plants to herbivory (Jablonka and Raz, 2009;Herman and Sultan, 2011;Holeski et al, 2012). Epigenetic modifications can alter gene expression through DNA methylation, histone modifications, and small-RNA biosynthesis, and are known to regulate plant growth, development, and reproduction (Pikaard and Scheid, 2014;Campos-Rivero et al, 2017). Previous studies have shown that both biotic and abiotic stresses can induce heritable epigenetic modifications in plants that can affect offspring phenotypes (see reviews by Holeski et al, 2012;Thiebaut et al, 2019).…”

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confidence: 99%

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Transgenerational impacts of herbivory and inbreeding on reproductive output in Solanum carolinense

Nihranz

Walker

Brown

et al. 2020

American J of Botany

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Premise Plant maternal effects on offspring phenotypes are well documented. However, little is known about how herbivory on maternal plants affects offspring fitness. Furthermore, while inbreeding is known to reduce plant reproductive output, previous studies have not explored whether and how such effects may extend across generations. Here, we addressed the transgenerational consequences of herbivory and maternal plant inbreeding on the reproduction of Solanum carolinense offspring. Methods Manduca sexta caterpillars were used to inflict weekly damage on inbred and outbred S. carolinense maternal plants. Cross‐pollinations were performed by hand to produce seed from herbivore‐damaged outbred plants, herbivore‐damaged inbred plants, undamaged outbred plants, and undamaged inbred plants. The resulting seeds were grown in the greenhouse to assess emergence rate and flower production in the absence of herbivores. We also grew offspring in the field to examine reproductive output under natural conditions. Results We found transgenerational effects of herbivory and maternal plant inbreeding on seedling emergence and reproductive output. Offspring of herbivore‐damaged plants had greater emergence, flowered earlier, and produced more flowers and seeds than offspring of undamaged plants. Offspring of outbred maternal plants also had greater seedling emergence and reproductive output than offspring of inbred maternal plants, even though all offspring were outbred. Moreover, the effects of maternal plant inbreeding were more severe when plant offspring were grown in field conditions. Conclusions This study demonstrates that both herbivory and inbreeding have fitness consequences that extend across generations even in outbred progeny.

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Section: Maternal Effects and Epigenetic Modifications May Contributementioning

confidence: 99%

mentioning

confidence: 99%

Transgenerational impacts of herbivory and inbreeding on reproductive output in Solanum carolinense

Nihranz

Walker

Brown

et al. 2020

American J of Botany

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“…The switch from vegetative growth to sexual reproduction requires genetic and epigenetic reprogramming and reallocation of metabolic and biochemical resources throughout the plant (Bartels et al, 2018;Schmidt, Schmid, & Grossniklaus, 2015). Epigenetic mechanisms and phytohormones signalling network interact not only to coordinate flowering (Campos-Rivero et al, 2017) but also to activate acclimative mechanisms under stress conditions (Lämke & Bäurle, 2017). Epigenetic modifications are molecular modifications that alter gene expression without changes in the underlying DNA sequence, and occur in the form of DNA methylation, histone modifications and noncoding micro RNAs (Bonasio, Tu, & Reinberg, 2010;Bossdorf, Richards, & Pigliucci, 2008).…”

Section: Introductionmentioning

confidence: 99%

Heat‐stress induced flowering can be a potential adaptive response to ocean warming for the iconic seagrass Posidonia oceanica

et al. 2019

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The Mediterranean Sea is particularly vulnerable to warming and the abrupt declines experienced by the endemic Posidonia oceanica populations after recent heatwaves have forecasted severe consequences for the ecological functions and socio‐economical services this habitat forming species provides. Nevertheless, this highly clonal and long‐lived species could be more resilient to warming than commonly thought since heat‐sensitive plants massively bloomed after a simulated heatwave, which provides the species with an opportunity to adapt to climate change. Taking advantage of this unexpected plant response, we investigated for the first time the molecular and physiological mechanisms involved in seagrass flowering through the transcriptomic analysis of bloomed plants. We also aimed to identify if flowering is a stress‐induced response as suggested from the fact that heat‐sensitive but not heat‐tolerant plants flowered. The transcriptomic profiles of flowered plants showed a strong metabolic activation of sugars and hormones and indications of an active transport of these solutes within the plant, most likely to induce flower initiation in the apical meristem. Preflowered plants also activated numerous epigenetic‐related genes commonly used by plants to regulate the expression of key floral genes and stress‐tolerance genes, which could be interpreted as a mechanism to survive and optimize reproductive success under stress conditions. Furthermore, these plants provided numerous molecular clues suggesting that the factor responsible for the massive flowering of plants from cold environments (heat‐sensitive) can be considered as a stress. Heat‐stress induced flowering may thus be regarded as an ultimate response to survive extreme warming events with potential adaptive consequences for the species. Fitness implications of this unexpected stress‐response and the potential consequences on the phenotypic plasticity (acclimation) and evolutionary (adaptation) opportunity of the species to ocean warming are finally discussed.

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“…DNA methylation also alters the effects of other factors regulating floral development [18]. The epigenetic changes caused by exogenous auxins were shown to affect flower development [19].…”

Section: Introductionmentioning

confidence: 99%

The Effects of DNA Methylation Inhibition on Flower Development in the Dioecious Plant Salix Viminalis

Cheng

Peng

et al. 2019

Forests

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DNA methylation, an important epigenetic modification, regulates the expression of genes and is therefore involved in the transitions between floral developmental stages in flowering plants. To explore whether DNA methylation plays different roles in the floral development of individual male and female dioecious plants, we injected 5-azacytidine (5-azaC), a DNA methylation inhibitor, into the trunks of female and male basket willow (Salix viminalis L.) trees before flower bud initiation. As expected, 5-azaC decreased the level of DNA methylation in the leaves of both male and female trees during floral development; however, it increased DNA methylation in the leaves of male trees at the flower transition stage. Furthermore, 5-azaC increased the number, length and diameter of flower buds in the female trees but decreased these parameters in the male trees. The 5-azaC treatment also decreased the contents of soluble sugars, starch and reducing sugars in the leaves of the female plants, while increasing them in the male plants at the flower transition stage; however, this situation was largely reversed at the flower development stage. In addition, 5-azaC treatment decreased the contents of auxin indoleacetic acid (IAA) in both male and female trees at the flower transition stage. These results indicate that hypomethylation in leaves at the flower transition stage promotes the initiation of flowering and subsequent floral growth in Salix viminalis, suggesting that DNA methylation plays a similar role in vegetative–reproductive transition and early floral development. Furthermore, methylation changes during the vegetative–reproductive transition and floral development were closely associated with the biosynthesis, metabolism and transportation of carbohydrates and IAA. These results provide insight into the epigenetic regulation of carbohydrate accumulation.

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Plant hormone signaling in flowering: An epigenetic point of view

Cited by 109 publications

References 223 publications

Transgenerational impacts of herbivory and inbreeding on reproductive output in Solanum carolinense

Transgenerational impacts of herbivory and inbreeding on reproductive output in Solanum carolinense

Heat‐stress induced flowering can be a potential adaptive response to ocean warming for the iconic seagrass Posidonia oceanica

The Effects of DNA Methylation Inhibition on Flower Development in the Dioecious Plant Salix Viminalis

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