Plant choice between arbuscular mycorrhizal fungal species results in increased plant P acquisition

Arbuscular mycorrhizal fungi (AMF) are plant root symbionts that provide phosphorus (P) to plants in exchange for photosynthetically fixed carbon (C). Previous research has shown that plants – given a choice among AMF species – may preferentially allocate C to AMF species that provide more P. However, these investigations rested on a limited set of plant and AMF species, and it therefore remains unclear how general this phenomenon is. Here, we combined 4 plant and 6 AMF species in 24 distinct plant-AMF species compositions in split-root microcosms, manipulating the species identity of AMF in either side of the root system. Using 14C and 32P/33P radioisotope tracers, we tracked the transfer of C and P between plants and AMF, respectively. We found that when plants had a choice of AMF species, AMF species which transferred more P acquired more C. Evidence for preferential C allocation to more beneficial AMF species within individual plant roots was equivocal. However, AMF species which tr..., , , # Overview

We grew plants in split root microcosms and manipulated the arbuscular mycorrhizal fungal (AMF) species identity in both sides of these microcosms. Our intent was to evaluate whether a common mechanism of symbiotic control among plant species is the preferential allocation of carbon (C) to higher quality AMF species when plants have options of AMF species in separate parts of their root systems.

# biomass\_and\_nutrients.csv

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Plant biomass (dry) as total and partitioned into nutrients, both fractional and total nutrient content for phosphorus (P) and nitrogen (N). Data are given for each species pool and the associated plant species x AMF species compositions

## Description of the data and file structure

| Variable | Description | units |
| -------- | ---------------------------------------------------------------------------------------------------------- | ----- |
| pool...

丛枝菌根真菌（Arbuscular mycorrhizal fungi, AMF）是一类植物根系共生微生物，可向宿主植物提供磷（P），并以植物通过光合作用固定的碳（C）作为交换回报。既往研究表明，当植物可在多种AMF物种中进行选择时，其会优先向供应更多磷的AMF物种分配光合碳。然而，此类研究仅基于有限的植物与AMF物种集合，因此该共生调控现象的普遍性仍不明确。

本研究在分根微宇宙培养系统中，将4种植物与6种AMF物种组合为24种不同的植物-AMF物种组合，对根系两侧的AMF物种身份进行操控。我们分别使用¹⁴C与³²P/³³P放射性同位素示踪剂，追踪了植物与AMF之间的碳、磷转移过程。研究发现，当植物拥有AMF物种选择空间时，向植物转移更多磷的AMF物种会获得更多的碳分配。在单株植物根系内，优先向更有益AMF物种分配碳的相关证据仍不明确。不过，那些AMF物种……

# 研究概况
我们在分根微宇宙培养系统中培养植物，并操控该系统两侧的AMF物种身份。本研究旨在评估：当植物在根系不同区域拥有多种AMF物种选择时，不同植物物种共有的共生调控机制，是否为向更优质的AMF物种优先分配光合碳。

## biomass_and_nutrients.csv
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该文件包含植物总干生物量及其按养分组分划分的详细数据，涵盖磷（P）与氮（N）的占比含量及总养分含量。数据按每个物种组合池，以及对应的植物物种×AMF物种组合进行整理呈现。

## 数据与文件结构说明
| 变量名 | 描述 | 单位 |
| -------- | --------------------------------------------------------------------------------------------------- | ----- |
| pool... | （原文未完整披露） | |