Does host outcrossing disrupt compatibility with heritable symbionts?
Does host outcrossing disrupt compatibility with heritable symbionts?
复制标题
宿主异交是否会破坏与可遗传共生体的兼容性？
DOI：
10.1111/oik.06182
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发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Miller, Tom E.
中科院分区：
文献类型：
--
作者：
Sneck, Michelle E.;Rudgers, Jennifer A.;Young, Carolyn A.;Miller, Tom E.
垂直传播的微生物在大型生物中很常见，可以增强宿主对环境压力的防御。由于垂直传播耦合主机和共生体谱系，共生体可能成为专化的主机物种或基因型。当宿主异交或杂交时，共生体的特化和生殖模式的差异会导致遗传共生体与新的宿主基因型之间的不相容性。这种不相容性可能表现为与其母体宿主在遗传上不同的宿主后代中定植失败或共生体生长不良。此外，寄主物种之间的异交会影响寄主和共生体的繁殖性能。我们通过操纵两种禾本科植物---北美野豌豆和欧洲野豌豆的种群和种间的异交来验证这些假设。canadensis，其宿主垂直传播的真菌内生菌（Epichlo属）。在温室和田间环境中，我们发现宿主-共生体相容性对宿主遗传背景的变化具有鲁棒性，跨越种群内、种群间和物种间杂交。共生体进入F1代的传播普遍较高，受宿主异交的影响较弱。此外，内生菌在植物中同样生长良好，无论宿主遗传背景如何，并以高频率传播到F2代。然而，异交，特别是种间杂交，降低了宿主的生殖适合度，从而降低了共生体。我们的研究结果挑战了宿主基因重组的假设，这通常超过了共生体，是一个破坏性的力量在遗传共生。相反，共生体可能是足够普遍的容忍生态现实的变化，在主机异交。
Vertically transmitted microbes are common in macro‐organisms and can enhance host defense against environmental stress. Because vertical transmission couples host and symbiont lineages, symbionts may become specialized to host species or genotypes. Specialization and contrasting reproductive modes of symbiotic partners could create incompatibilities between inherited symbionts and novel host genotypes when hosts outcross or hybridize. Such incompatibilities could manifest as failed colonization or poor symbiont growth in host offspring that are genetically dissimilar from their maternal host. Moreover, outcrossing between host species could influence both host and symbiont reproductive performance. We tested these hypotheses by manipulating outcrossing between populations and species of two grasses,Elymus virginicusandE. canadensis, that host vertically transmitted fungal endophytes (genusEpichloё). In both greenhouse and field settings, we found that host–symbiont compatibility was robust to variation in host genetic background, spanning within‐population, between‐population and between‐species crosses. Symbiont transmission into the F1generation was generally high and weakly affected by host outcrossing. Furthermore, endophytes grew equally well in planta regardless of host genetic background and transmitted at high frequencies into the F2generation. However, outcrossing, especially inter‐specific hybridization, reduced reproductive fitness of the host, and thereby the symbiont. Our results challenge the hypothesis that host genetic recombination, which typically exceeds that of symbionts, is a disruptive force in heritable symbioses. Instead, symbionts may be sufficiently generalized to tolerate ecologically realistic variation in host outcrossing.
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影响因子：
8.8
作者：
Poisot T;Bever JD;Nemri A;Thrall PH;Hochberg ME
通讯作者：
Hochberg ME
高羊茅内生菌检测：商业免疫印迹检测试剂盒与显微镜分析的比较
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
E. E. Hiatt;N. Hill;J. Bouton;J. A. Stuedemann
通讯作者：
J. A. Stuedemann
影响因子：
3.6
作者：
Michelle E. Sneck;Jennifer A. Rudgers;C. Young;T. Miller
通讯作者：
Michelle E. Sneck;Jennifer A. Rudgers;C. Young;T. Miller
内生菌通过多年生黑麦草种子传播：真菌抗原的免疫检测。
DOI：
--
发表时间：
2004
期刊：
Fungal Genetics and Biology 41
影响因子：
--
作者：
Majewska-Sawka;A.;H.Nakashima
通讯作者：
H.Nakashima
加拿大披碱草和弗吉尼亚披碱草（禾本科）之间的杂交和渗入
DOI：
--
发表时间：
1978
期刊：
影响因子：
--
作者：
E. Nelson;R. J. Tyrl
通讯作者：
R. J. Tyrl