Costs and Benefits of Transgenerational Induced Resistance in Arabidopsis.
Costs and Benefits of Transgenerational Induced Resistance in Arabidopsis.
复制标题
拟南芥跨代诱导抗性的成本和收益。
DOI：
10.3389/fpls.2021.644999
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发表时间：
2021
影响因子：
5.6
通讯作者：
Ton J
中科院分区：
文献类型：
--
作者：
López Sánchez A;Pascual-Pardo D;Furci L;Roberts MR;Ton J
最近的证据表明，受胁迫的植物利用表观遗传机制将获得的抗性性状传递给后代。然而，由于缺乏对父母如何解释与t-IR的有效性、稳定性和预期生态成本相关的环境线索的清楚理解，因此对跨代诱导抗性（t-IR）的进化和生态意义知之甚少。在这里，我们使用全因子设计来研究拟南芥暴露于生物营养病原体、坏死性病原体和盐度增加的胁迫强度后t-IR的特异性、成本和跨代稳定性。我们表明，t-IR对生物营养或坏死性病原体感染的反应对相同生活方式的病原体有效。这种病原体介导的t-IR与生态成本有关，因为受生物营养感染的父母的后代更容易受到坏死性病原体和盐胁迫的影响，而受坏死性感染的父母的后代更容易受到生物营养病原体的影响。因此，当父母和后代处于匹配的环境中时，病原体介导的t-IR提供了益处，但在不匹配的环境中，其相关成本变得明显。相比之下，土壤盐度在匹配环境中未能介导t-IR对抗盐胁迫，但在不匹配环境中引起非特异性t-IR对抗生物营养和坏死性病原体。然而，这种非特异性t-IR反应的生态相关性仍然值得怀疑，因为它的诱导被种子产量和生存能力急剧下降所产生的主要生殖成本所抵消。最后，我们发现病原体介导的t-IR的成本和跨代稳定性与亲本所经历的疾病压力成正比，这表明植物使用疾病严重程度作为环境代理来调整t-IR的投资。
Recent evidence suggests that stressed plants employ epigenetic mechanisms to transmit acquired resistance traits to their progeny. However, the evolutionary and ecological significance of transgenerational induced resistance (t-IR) is poorly understood because a clear understanding of how parents interpret environmental cues in relation to the effectiveness, stability, and anticipated ecological costs of t-IR is lacking. Here, we have used a full factorial design to study the specificity, costs, and transgenerational stability of t-IR following exposure of Arabidopsis thaliana to increasing stress intensities by a biotrophic pathogen, a necrotrophic pathogen, and salinity. We show that t-IR in response to infection by biotrophic or necrotrophic pathogens is effective against pathogens of the same lifestyle. This pathogen-mediated t-IR is associated with ecological costs, since progeny from biotroph-infected parents were more susceptible to both necrotrophic pathogens and salt stress, whereas progeny from necrotroph-infected parents were more susceptible to biotrophic pathogens. Hence, pathogen-mediated t-IR provides benefits when parents and progeny are in matched environments but is associated with costs that become apparent in mismatched environments. By contrast, soil salinity failed to mediate t-IR against salt stress in matched environments but caused non-specific t-IR against both biotrophic and necrotrophic pathogens in mismatched environments. However, the ecological relevance of this non-specific t-IR response remains questionable as its induction was offset by major reproductive costs arising from dramatically reduced seed production and viability. Finally, we show that the costs and transgenerational stability of pathogen-mediated t-IR are proportional to disease pressure experienced by the parents, suggesting that plants use disease severity as an environmental proxy to adjust investment in t-IR.
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影响因子：
3.7
作者：
Boyko A;Blevins T;Yao Y;Golubov A;Bilichak A;Ilnytskyy Y;Hollunder J;Meins F Jr;Kovalchuk I
通讯作者：
Kovalchuk I
影响因子：
13.6
作者：
Crisp PA;Ganguly D;Eichten SR;Borevitz JO;Pogson BJ
通讯作者：
Pogson BJ
影响因子：
56.9
作者：
Galloway, Laura F.;Etterson, Julie R.
通讯作者：
Etterson, Julie R.
影响因子：
2.6
作者：
Herman, Jacob J.;Sultan, Sonia E.;Riggs, Charlotte
通讯作者：
Riggs, Charlotte
DOI：
10.1098/rspb.2016.1136
发表时间：
2016-09-28
影响因子：
4.7
作者：
Pigeault, R.;Garnier, R.;Gandon, S.
通讯作者：
Gandon, S.