丛枝菌根绿色植物龙胆部分异养和营养柔韧性的同位素证据。

IF 3.6 3区 生物学 Q1 PLANT SCIENCES
Plant Biology Pub Date : 2025-07-14 DOI:10.1111/plb.70071
K. Suetsugu
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引用次数: 0

摘要

丛枝菌根(AM)关联是陆地生态系统的核心,通常促进植物有机碳与真菌矿物营养物质的交换。完全真菌异养,即植物从AM真菌中获得所有碳,广泛存在于许多无叶绿素植物类群中,如龙胆科的Voyria和Voyriella。然而,部分真菌异养的程度和生态意义,其中绿色AM植物补充真菌碳的光合作用,仍然存在争议。本研究利用13C和15N稳定同位素分析研究了龙胆科植物龙胆(Gentiana zollingeri)的营养模式,重点研究了同位素富集与叶片比(叶片生物量相对于茎部总生物量)的关系。龙胆的13C和15N显著高于自养参考植物,表明其对真菌来源的碳和氮的依赖。13C富集与叶片比呈负相关,表明富集反映的是对真菌的依赖,而非其他生理性状。值得注意的是,地下茎的13C富集程度与完全真菌异养龙胆科相当,表明其主要由真菌碳组成。这些发现支持了G. zollingeri采用灵活的营养策略,根据光合能力调整真菌依赖性的假设。虽然仅适度的13C和15N富集不能证实部分真菌异养,但结合稳定同位素数据和生态生理指标(如13C富集与叶比负相关)的综合方法有力地支持了真菌在G. zollingeri中的碳获取。类似的框架将有助于严格评估其他具有微妙同位素富集的巴黎型AM植物的部分分枝异养性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Isotope evidence for partial mycoheterotrophy and trophic flexibility in the arbuscular mycorrhizal green plant Gentiana zollingeri

Isotope evidence for partial mycoheterotrophy and trophic flexibility in the arbuscular mycorrhizal green plant Gentiana zollingeri

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来源期刊
Plant Biology
Plant Biology 生物-植物科学
CiteScore
8.20
自引率
2.60%
发文量
109
审稿时长
3 months
期刊介绍: Plant Biology is an international journal of broad scope bringing together the different subdisciplines, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, and mycology. Plant Biology publishes original problem-oriented full-length research papers, short research papers, and review articles. Discussion of hot topics and provocative opinion articles are published under the heading Acute Views. From a multidisciplinary perspective, Plant Biology will provide a platform for publication, information and debate, encompassing all areas which fall within the scope of plant science.
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