Epigenetic mechanisms of plant stress responses and adaptation

Sahu, Pranav Pankaj; Pandey, Garima; Sharma, Namisha; Puranik, Swati; Muthamilarasan, Mehanathan

doi:10.1007/s00299-013-1462-x

Cited by 205 publications

(151 citation statements)

References 70 publications

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“…Shabanimofrad et al 2013, as well as epigenetic effects which may play a crucial role in the adaptive evolution to changing environment (Sahu et al 2013). This is very important since jatropha accessions with high phenotypic variability showed low level of genetic diversity, supporting that the species has high phenotypic plasticity.…”

Section: Genetic Diversity Of Jatropha Acessions In Northern Minas Gementioning

confidence: 99%

Genetic structure from the oldest Jatropha germplasm bank of Brazil and contribution for the genetic improvement

Santos

Ferreira

Setotaw

et al. 2016

An. Acad. Bras. Ciênc.

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Jatropha is a potential oilseed crop, which requires mitigating factors such as the low genetic variability of the species. The solution runs through the research of Brazilian germplasm. Attention should be given to the germplasm of jatropha the north of Minas Gerais, because this is the oldest national collection and because this region may be a regions of jatropha diversity due to selection pressure arising from environmental adversities. Therefore, the objective of this study was to investigate the genetic diversity of 48 accessions of collection from Empresa de Pesquisa Agropecuária de Minas Gerais (EPAMIG), using SSR and ISSR markers. The results showed low genetic diversity, but some individuals stood out as J. mollissima (48), J. podagrica (47), Mexican accessions (42, 43, 44 and 45) and some national accessions (28, 29, 41 and 46). Therefore, aiming to increase the genetic variability and improve the effectiveness of jatropha breeding programs, it is suggested to explore such as parental accessions to generate commercial hybrids. This fact implies the possibility to support future production of jatropha, since this culture may be an important source of income, especially for small farmers living in semiarid regions of Brazil.

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Section: Genetic Diversity Of Jatropha Acessions In Northern Minas Gementioning

confidence: 99%

Genetic structure from the oldest Jatropha germplasm bank of Brazil and contribution for the genetic improvement

Santos

Ferreira

Setotaw

et al. 2016

An. Acad. Bras. Ciênc.

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show abstract

“…More exotic mechanisms underlying epigenetic modification of phenotype across generations include self-sustaining loops and structural inheritance via proteins, which occurs in some invertebrates (Jablonka and Lamb, 2005;Beisson, 2008;Ho and Burggren, 2010). As a side note for the current audience, there also exists a rich investigation of epigenetics in plants (for an entry into that extensive plant literature, see Hauser et al, 2011;Sahu et al, 2013), and of epigenetic influences at the population level as well as at the level of the individual (Day and Bonduriansky, 2011;Geoghegan and Spencer, 2012). The discussion of these topics in epigenetics is beyond the scope of this paper, and the reader is directed to the references just cited for further information on epigenetic mechanisms.…”

Section: Sources Of Physiological Variation -The 'Usual Suspects'mentioning

confidence: 99%

Epigenetics as a source of variation in comparative animal physiology – or – Lamarck is lookin' pretty good these days

Burggren

2014

Journal of Experimental Biology

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Considerable variation is inherent both within and between comparative physiological data sets. Known sources for such variation include diet, gender, time of day and season of experiment, among many other factors, but a meta-analysis of physiological studies shows that surprisingly few studies report controlling for these factors. In fact, less than 3% of comparative physiological papers mention epigenetics. However, our understanding of epigenetic influences on physiological processes is growing rapidly, and it is highly likely that epigenetic phenomena are an additional 'hidden' source of variation, particularly in wild-caught specimens. Recent studies have shown epigenetic inheritance of commonly studied traits such as metabolic rate (water fleas Daphnia magna; emu, Dromaius novaellandiae), hypoxic tolerance, cardiac performance (zebrafish, Danio rerio), as well as numerous morphological effects. The ecological and evolutionary significance of such epigenetic inheritance is discussed in a comparative physiological context. Finally, against this context of epigenetic inheritance of phenotype, this essay also provides a number of caveats and warnings regarding the interpretation of transgenerational phenotype modification as a true epigenetic phenomenon. Parental effects, sperm storage, multiple paternity and direct gamete exposure can all be confounding factors. Epigenetic inheritance may best be studied in animal models that can be maintained in the laboratory over multiple generations, to yield parental stock that themselves are free of epigenetic effects from the historical experiences of their parents.

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“…Further understanding the epigenetic mechanisms of gene regulation may not only provide basic information about the regulation of genes under the stress, but also a valuable platform for potential applications of genetic manipulation of plants towards enhanced tolerance to the environmental stresses. 9 Thus, deciphering the epigenetic machineries towards tackling the environmental stresses in plants has become an important area of scientific investigations. Abiotic stresses have direct, negative effects on the biochemical and physiological processes associated with plant growth and development.…”

Section: Introductionmentioning

confidence: 99%

Epigenetic Regulation of Abiotic Stress Tolerance in Plants

Kumar¹

2016

APAR

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Sequence specific, genome-wide changes are being reported in plants which often correlate with regulation of gene expression at transcription levels. Many of such changes occur during stress exposure, and both gene expression and chromatin changes may revert to the pre-stress state shortly thereafter. There are reports for stress-induced chromatin changes that are transmitted to the progenies. Such changes alter gene expression without having any change in the DNA sequence. These epigenetic changes include modification in DNA base, histones and small non-coding RNAs. Some of the cytosine residues in nuclear genome may get methylated at 5' position by the action of DNA methyl transferase. Histones are also subjected to post-translational modifications which affect transcription, replication, chromosome condensation/segregation, as well as DNA repair. Methylation of a promoter may repress gene transcription, while methylation of coding region of a gene may cause post-transcriptional gene silencing. Epigenetic changes may also be inherited over the generations in the form of epialleles, which are considered as a source of genetic variability for crop improvement. The roles of epigenetic changes in plant's response to stress are becoming increasingly evident, suggesting that epigenetic mechanisms play important role in stress tolerance, acclimatization, adaptation and evolution processes. Therefore, it is worth investigating the epigenetic mechanisms of gene regulation in plants, and their possible exploitation in crop improvement.

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Epigenetic mechanisms of plant stress responses and adaptation

Cited by 205 publications

References 70 publications

Genetic structure from the oldest Jatropha germplasm bank of Brazil and contribution for the genetic improvement

Genetic structure from the oldest Jatropha germplasm bank of Brazil and contribution for the genetic improvement

Epigenetics as a source of variation in comparative animal physiology – or – Lamarck is lookin' pretty good these days

Epigenetic Regulation of Abiotic Stress Tolerance in Plants

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