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Int. J. Mol. Sci. 2013, 14(4), 6674-6689; doi:10.3390/ijms14046674
Article

Transgenerational, Dynamic Methylation of Stomata Genes in Response to Low Relative Humidity

1,†
, 2,‡
, 1
, 1
 and 2,‡,*
Received: 31 January 2013; in revised form: 9 March 2013 / Accepted: 18 March 2013 / Published: 26 March 2013
(This article belongs to the Special Issue Abiotic and Biotic Stress Tolerance Mechanisms in Plants)
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Abstract: Transgenerational inheritance of abiotic stress-induced epigenetic modifications in plants has potential adaptive significance and might condition the offspring to improve the response to the same stress, but this is at least partly dependent on the potency, penetrance and persistence of the transmitted epigenetic marks. We examined transgenerational inheritance of low Relative Humidity-induced DNA methylation for two gene loci in the stomatal developmental pathway in Arabidopsis thaliana and the abundance of associated short-interfering RNAs (siRNAs). Heritability of low humidity-induced methylation was more predictable and penetrative at one locus (SPEECHLESS, entropy ≤ 0.02; χ2 < 0.001) than the other (FAMA, entropy ≤ 0.17; χ2 ns). Methylation at SPEECHLESS correlated positively with the continued presence of local siRNAs (r2 = 0.87; p = 0.013) which, however, could be disrupted globally in the progeny under repeated stress. Transgenerational methylation and a parental low humidity-induced stomatal phenotype were heritable, but this was reversed in the progeny under repeated treatment in a previously unsuspected manner.
Keywords: environmental epigenetics; transgenerational methylation; water stress; siRNAs; stomata; SPEECHLESS; FAMA environmental epigenetics; transgenerational methylation; water stress; siRNAs; stomata; SPEECHLESS; FAMA
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Tricker, P.J.; López, C.M.R.; Gibbings, G.; Hadley, P.; Wilkinson, M.J. Transgenerational, Dynamic Methylation of Stomata Genes in Response to Low Relative Humidity. Int. J. Mol. Sci. 2013, 14, 6674-6689.

AMA Style

Tricker PJ, López CMR, Gibbings G, Hadley P, Wilkinson MJ. Transgenerational, Dynamic Methylation of Stomata Genes in Response to Low Relative Humidity. International Journal of Molecular Sciences. 2013; 14(4):6674-6689.

Chicago/Turabian Style

Tricker, Penny J.; López, Carlos M.R.; Gibbings, George; Hadley, Paul; Wilkinson, Mike J. 2013. "Transgenerational, Dynamic Methylation of Stomata Genes in Response to Low Relative Humidity." Int. J. Mol. Sci. 14, no. 4: 6674-6689.


Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert