Cooperative root graft networks benefit mangrove trees under stress

Vovides, Alejandra G.; Wimmler, Marie-Christin; Schrewe, Flalk; Balke, Thorsten; Zwanzig, Martin; Piou, Cyril; Delay, Erwann; López‐Portillo, Jorge; Berger, Uta

doi:10.1038/s42003-021-02044-x

Cited by 3 publications

(1 citation statement)

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“…Knee roots, buttress roots, prop roots, stilt roots, and cable roots provide support, transport of water and nutrients in addition to supplying oxygen to survive anoxic environment ( Kitaya et al., 2002 ; Srikanth et al., 2016 ). A recent study on natural root graft formation in the A. marina population discusses benefits of resource sharing through these root networks which gives advantage to grow better under stressful conditions ( Vovides et al., 2021 ). Studies on genes governing the aforementioned adaptive responses are of great importance and are discussed below in separate sections for individual adaptive features.…”

Section: Evolution Of Mangroves and Their Adaptations To Intertidal Environmentsmentioning

confidence: 99%

Genetic and molecular mechanisms underlying mangrove adaptations to intertidal environments

2022

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Mangroves are halophytic plants belonging to diverse angiosperm families that are adapted to highly stressful intertidal zones between land and sea. They are special, unique, and one of the most productive ecosystems that play enormous ecological roles and provide a large number of benefits to the coastal communities. To thrive under highly stressful conditions, mangroves have innovated several key morphological, anatomical, and physio-biochemical adaptations. The evolution of the unique adaptive modifications might have resulted from a host of genetic and molecular changes and to date we know little about the nature of these genetic and molecular changes. Although slow, new information has accumulated over the last few decades on the genetic and molecular regulation of the mangrove adaptations, a comprehensive review on it is not yet available. This review provides up-to-date consolidated information on the genetic, epigenetic, and molecular regulation of mangrove adaptive traits.

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Section: Evolution Of Mangroves and Their Adaptations To Intertidal Environmentsmentioning

confidence: 99%

Genetic and molecular mechanisms underlying mangrove adaptations to intertidal environments

2022

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Assessing species composition and structural attributes across different habitats to evaluate changes and management effectiveness of protected mangroves

Djamaluddin,

Holmes,

Djabar

2024

Forest Ecology and Management

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Root grafts matter for inter-tree water exchange – a quantification of water translocation between root grafted mangrove trees using field data and model-based indications

et al. 2022

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Background and Aims Trees interconnected through functional root grafts can exchange resources, but the effect of exchange on trees remains under debate. A mechanistic understanding of resources exchange via functional root grafts will help understand their ecological implications for tree water exchange for individual trees, groups of trees, and forest stands. Methods To identify the main patterns qualitatively describing the movement of sap between grafted trees, we reviewed available literature on root grafting in woody plants that focus on tree allometry and resource translocation via root grafts. We then extended the BETTINA model, which simulates mangrove (Avicennia germinans) tree growth on the individual tree scale, in order to synthesize the available empirical information. Using allometric data from a field study in mangrove stands, we simulated potential water exchange and analyzed movement patterns between grafted trees. Key Results In the simulations, relative water exchange ranged between -9.17 and 20.3 %, and was driven by gradients of water potential, i.e. differences in tree size and water availability. Moreover, the exchange of water through root grafts alters the water balance of trees and their feedback with the soil: grafted trees that receive water from their neighbors reduce their water uptake. Conclusions Our individual-tree modelling study is a first theoretical attempt to quantify root graft-mediated water exchange between trees. Our findings indicate that functional root grafts represent a vector of hydraulic redistribution, helping to maintain the water balance of grafted trees. This non-invasive approach can serve as a fundament for designing empirical studies to better understand the role of grafted root interaction networks on a broader scale.

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Cooperative root graft networks benefit mangrove trees under stress

Cited by 3 publications

References 55 publications

Genetic and molecular mechanisms underlying mangrove adaptations to intertidal environments

Genetic and molecular mechanisms underlying mangrove adaptations to intertidal environments

Assessing species composition and structural attributes across different habitats to evaluate changes and management effectiveness of protected mangroves

Root grafts matter for inter-tree water exchange – a quantification of water translocation between root grafted mangrove trees using field data and model-based indications

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