Abstract
Mycorrhizal phosphorus (P)-scavenging strategies are inefficient in severely P-impoverished environments; yet many mycorrhizal species occur here. How these species acquire P and how their acquisition coordinates with root and leaf traits remain unknown. We measured rhizosheath acid-phosphatases, leaf P-resorption efficiency and root and leaf economic traits and defence metabolites, such as phenolics and flavonoids, of Hibbertia hypericoides (Dilleniaceae) and H. racemosa in monoculture with arbuscular mycorrhizal fungal inoculation and in a mixture with P-mobilising Banksia attenuata (Proteaceae) with or without arbuscular mycorrhizal fungal inoculation. Phosphorus acquisition of both Hibbertia species was facilitated by B. attenuata, but through different interactions: H. hypericoides, non-mycorrhizal despite having been inoculated, used its roots, whereas H. racemosa, forming arbuscular mycorrhizal associations following inoculation, relied on mycorrhizal interactions with B. attenuata. This was linked to positions along the 'collaboration' dimension of root economic space and coordinated with root defence metabolites. Hibbertia species diverged along the leaf economic spectrum, with higher scores (more conservative strategy) negatively correlated with leaf P-resorption efficiency. We conclude that arbuscular mycorrhizal fungi play a key role in the P-acquisition strategy of H. racemosa. Root and leaf traits and rhizosheath acid-phosphatase activity efficiency interacted and contributed to the growth of both Hibbertia species.
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Claims 7
Claim · model-written summary
Banksia attenuata facilitated phosphorus acquisition by H. hypericoides.
- Taxon
- H. hypericoides
Hibbertia hypericoidese0 - Treatment
- B. attenuatae0
- Interactor
- B. attenuata
Banksia attenuatae0other - Outcome
- Phosphorus acquisitione0
- Direction
- facilitatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus acquisition of both Hibbertia species was facilitated by B. attenuata, but through different interactions: H. hypericoides, non-mycorrhizal despite having been inoculated, used its roots”
Claim · model-written summary
H. hypericoides remained non-mycorrhizal despite inoculation.
- Taxon
- H. hypericoidesHibbertia hypericoidese0
- Interactor
- Arbuscular Mycorrhizal Fungit0symbiont
- Outcome
- non-mycorrhizale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H. hypericoides, non-mycorrhizal despite having been inoculated, used its roots”
t0“Arbuscular Mycorrhizal Fungi”
Claim · model-written summary
H. racemosa formed arbuscular mycorrhizal associations following inoculation.
- Taxon
- H. racemosa
Hibbertia racemosae0 - Treatment
- inoculatione0
- Interactor
- arbuscular mycorrhizalt0symbiont
- Outcome
- forming arbuscular mycorrhizal associationse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H. racemosa, forming arbuscular mycorrhizal associations following inoculation, relied on mycorrhizal interactions with B. attenuata.”
t0“Arbuscular Mycorrhizal Fungi”
Claim · model-written summary
Banksia facilitated H. racemosa phosphorus acquisition through mycorrhizal interactions.
- Taxon
- H. racemosaHibbertia racemosae0
- Interactor
- B. attenuataBanksia attenuatae0other
- Outcome
- Phosphorus acquisitione0
- Qualifier
- mycorrhizal interactionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus acquisition of both Hibbertia species was facilitated by B. attenuata, but through different interactions: H. hypericoides, non-mycorrhizal despite having been inoculated, used its roots, whereas H. racemosa, forming arbuscular mycorrhizal associations following inoculation, relied on mycorrhizal interactions with B. attenuata.”
Claim · model-written summary
Hibbertia species diverged along the leaf economic spectrum.
- Outcome
- diverged along the leaf economic spectrume0
HibbertiaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hibbertia species diverged along the leaf economic spectrum”
Claim · model-written summary
The authors conclude that mycorrhizal fungi play a key role in phosphorus acquisition by H. racemosa.
- Taxon
- H. racemosaHibbertia racemosae0
- Interactor
- arbuscular mycorrhizal fungie0symbiont
- Outcome
- P-acquisition strategye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“arbuscular mycorrhizal fungi play a key role in the P-acquisition strategy of H. racemosa.”
Claim · model-written summary
Root and leaf traits and rhizosheath acid phosphatase activity contributed to growth of Hibbertia species.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root and leaf traits and rhizosheath acid-phosphatase activity efficiency interacted and contributed to the growth of both Hibbertia species.”