Epigenetic changes and photosynthetic plasticity in response to environment

Duarte-Aké, Fátima; Us-Camas, Rosa; Cancino-García, Víctor J.; De‐la‐Peña, Clelia

doi:10.1016/j.envexpbot.2018.12.010

Cited by 9 publications

(10 citation statements)

References 182 publications

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“…Epigenetic differences might be induced by subtle differences in the interplay between the environment and developmental phase between individual cells during maintenance. It has already been shown that the amount of epigenetic variation in a C. reinhardtii population can contribute to its capability to acclimate to different environmental stress factors (Kronholm et al 2017 ; Duarte-Aké et al 2018 ). In addition, the chloroplast genome of C. reinhardtii has been reported to be especially prone to modification via methylation by DNA methyltransferase DMT 1 (Nishiyama R et al 2002 ).…”

Section: Discussionmentioning

confidence: 99%

Acclimation of Chlamydomonas reinhardtii to extremely strong light

2020

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Most photosynthetic organisms are sensitive to very high light, although acclimation mechanisms enable them to deal with exposure to strong light up to a point. Here we show that cultures of wild-type Chlamydomonas reinhardtii strain cc124, when exposed to photosynthetic photon flux density 3000 μmol m−2 s−1 for a couple of days, are able to suddenly attain the ability to grow and thrive. We compared the phenotypes of control cells and cells acclimated to this extreme light (EL). The results suggest that genetic or epigenetic variation, developing during maintenance of the population in moderate light, contributes to the acclimation capability. EL acclimation was associated with a high carotenoid-to-chlorophyll ratio and slowed down PSII charge recombination reactions, probably by affecting the pre-exponential Arrhenius factor of the rate constant. In agreement with these findings, EL acclimated cells showed only one tenth of the 1O2 level of control cells. In spite of low 1O2 levels, the rate of the damaging reaction of PSII photoinhibition was similar in EL acclimated and control cells. Furthermore, EL acclimation was associated with slow PSII electron transfer to artificial quinone acceptors. The data show that ability to grow and thrive in extremely strong light is not restricted to photoinhibition-resistant organisms such as Chlorella ohadii or to high-light tolerant mutants, but a wild-type strain of a common model microalga has this ability as well.

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Section: Discussionmentioning

confidence: 99%

Acclimation of Chlamydomonas reinhardtii to extremely strong light

2020

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“…Populations of plants are therefore generally believed to be primed for the environments they inhabit due to past adaptive and selective forces (Bell & Collins, 2008). However, rapid increases in CO 2 concentrations and drought events -two major facets of contemporary climate change with contrasting effects on plant carbon acquisition and water status -pose new challenges to plants by disrupting these evolutionary dynamics and make it more difficult for plants to sustain productivity under these novel conditions (Duarte-Aké et al , 2019;Hamann et al , 2021). Such rapid climatic changes are assumed to create a range of new selection pressures on plant populations (Hoffmann & Sgrò, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Transgenerational memory such as epigenetic regulation is increasingly recognized as an important process in plants' response to environmental changes in e.g. temperature, light and water availability (Duarte-Aké et al , 2019). Intra-and transgenerational memory is furthermore discussed as an important component of single organisms or population resilience to climatic extreme events such as drought (Walter et al , 2013(Walter et al , , 2016.…”

Section: Discussionmentioning

confidence: 99%

Transgenerational effects of elevated CO 2 : Downregulation of photosynthetic efficiency and stomatal sensitivity to drought

Schweiger

Awdamet

Drenckhan

et al. 2022

Preprint

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Increasing atmospheric CO and drought are major symptoms of anthropogenic climate change with profound effects on plant growth. Transgenerational memory (i.e. influence of the parental environment on offspring phenotype and performance) has been suggested as a relevant mechanism for plants to build-up adaptative capacity for rapid environmental changes. However, this mechanism of pre-adaptation remains poorly investigated so far. We investigated intra- and transgenerational effects of elevated CO on drought response of wheat. We used seeds from a FACE (Free Air Carbon Dioxide Enrichment) experiment with ambient and elevated CO to grow plants in climate chambers in which we varied CO , atmospheric water demand and soil moisture. We quantified photosynthetic efficiency, stomatal sensitivity and biomass production. We observed intragenerational upregulation of photosynthetic efficiency but transgenerational downregulation of photosynthetic efficiency, stomatal sensitivity and water use efficiency as response to maternally elevated CO . Plant biomass was affected by drought and experimental CO but not by maternal CO . Our study showcases the importance of transgenerational memory effects when studying climate change response of plants and could have major implications for our understanding of global dynamics of carbon sequestration. It highlights the pressing need for multi-generational experiments accounting for transgenerational memory effects of elevated CO .

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“…These processes rely on complex transcriptional regulation. An increasing amount of evidence indicates that epigenetic modifications also play significant roles in drought response regulation [25][26][27][28][29]. However, there has long been a missing link between transcriptional and epigenetic regulation mechanisms.…”

Section: Molecular Response To Drought: the Aba Drought Response Pathwaysmentioning

confidence: 99%

Histone Acetylation Changes in Plant Response to Drought Stress

Gao

et al. 2021

Genes

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Drought stress causes recurrent damage to a healthy ecosystem because it has major adverse effects on the growth and productivity of plants. However, plants have developed drought avoidance and resilience for survival through many strategies, such as increasing water absorption and conduction, reducing water loss and conversing growth stages. Understanding how plants respond and regulate drought stress would be important for creating and breeding better plants to help maintain a sound ecosystem. Epigenetic marks are a group of regulators affecting drought response and resilience in plants through modification of chromatin structure to control the transcription of pertinent genes. Histone acetylation is an ubiquitous epigenetic mark. The level of histone acetylation, which is regulated by histone acetyltransferases (HATs) and histone deacetylases (HDACs), determines whether the chromatin is open or closed, thereby controlling access of DNA-binding proteins for transcriptional activation. In this review, we summarize histone acetylation changes in plant response to drought stress, and review the functions of HATs and HDACs in drought response and resistance.

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Epigenetic changes and photosynthetic plasticity in response to environment

Cited by 9 publications

References 182 publications

Acclimation of Chlamydomonas reinhardtii to extremely strong light

Acclimation of Chlamydomonas reinhardtii to extremely strong light

Transgenerational effects of elevated CO 2 : Downregulation of photosynthetic efficiency and stomatal sensitivity to drought

Histone Acetylation Changes in Plant Response to Drought Stress

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