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首页> 外文期刊>The New Phytologist >Transgenerational effects of plant sex and arbuscular mycorrhizalsymbiosis
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Transgenerational effects of plant sex and arbuscular mycorrhizalsymbiosis

机译：植物性与丛枝菌根共生的遗传转化效应

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摘要

In gynodioecious plants, females are predicted to produce more and/or better offspringthan hermaphrodites in order to be maintained in the same population. In the field, the rootsof both sexes are usually colonized by arbuscular mycorrhizal (AM) fungi. Transgenerationaleffects of mycorrhizal symbiosis are largely unknown, although theoretically expected. We examined the maternal and paternal effects of AM fungal symbiosis and host sex onseed production and posterior seedling performance in Geranium sylvaticum, a gynodioeciousplant. We hand-pollinated cloned females and hermaphrodites in symbiosis with AMfungi or in nonmycorrhizal conditions and measured seed number and mass, and seedlingsurvival and growth in a glasshouse experiment. Females produced more seeds than hermaphrodites, but the seeds did not germinate, survive orgrow better.Mycorrhizal plants were larger, but did not produce more seeds than nonmycorrhizalplants. Transgenerational parental effects of AMfungi were verified in seedling performance. This is the first study to show transgenerational mycorrhiza-mediated parental effects in agynodioecious species. Mycorrhizal symbiosis affects plant fitness mainly through femalefunctions with enduring effects on the next generation.
机译：在雌雄同株的植物中，预计雌性会比雌雄同体产生更多和/或更好的后代，以便维持在同一种群中。在田间，两性的根通常被丛枝菌根（AM）真菌定殖。尽管理论上是预期的，但菌根共生的转基因作用在很大程度上尚不清楚。我们研究了雌雄同株植物天竺葵的AM真菌共生和寄主性别对种子生产和后苗性能的母体和父体效应。我们在与AMfungi共生或在非菌根条件下对人工繁殖的雌性和雌雄同体进行手工授粉，并在温室实验中测量了种子的数量和质量，以及幼苗的存活和生长。雌性产生的种子比雌雄同体的种子多，但种子不发芽，更不能长成。菌根的植物较大，但不比非菌根的植物产生更多的种子。 AMfungi的代代父母效应已在苗期表现中得到证实。这是第一个研究表明在雌雄同体物种中发生了跨代菌根介导的父母效应。菌根共生主要通过女性功能影响植物健康，并对下一代产生持久影响。

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