Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging

Kumar, Amit; Duijnen, Richard van; Delory, Benjamin; Reichel, Rüdiger; Brüggemann, Nicolas; Temperton, Vicky M.

doi:10.1007/s11104-020-04626-w

Cited by 18 publications

(13 citation statements)

References 70 publications

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“…Instead, plastic root responses to plant order of arrival are more likely to explain why grasses-first communities rooted more shallowly than the others did. Such plastic root responses affecting root allocation and foraging have been well documented in the past (Mahall and Callaway 1991, Semchenko et al 2007, Mommer et al 2012, Kumar et al 2020, Lepik et al 2021) but, to date, there has been little evidence that the order of arrival of plants can affect the root distribution of individual species (Weidlich et al 2018b). These results highlight the need for more research on how plant order of arrival modulates root foraging and distribution at the functional group and species level, which is a particularly challenging endeavour.…”

Section: Discussionmentioning

confidence: 99%

Assembly history modulates vertical root distribution in a grassland experiment

Alonso‐Crespo

Weidlich

Temperton

et al. 2022

Oikos

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The order of arrival of plant species during assembly can affect the structure and functioning of grassland communities. These so‐called priority effects have been extensively studied aboveground, but we still do not know how they affect the vertical distribution of roots in the soil and the rooting depth of plant communities. To test this hypothesis, we manipulated the order of arrival of three plant functional groups (forbs, grasses and legumes) in a rhizobox experiment. Priority effects were created by sowing one functional group 10 days before the other two. Rhizoboxes in which all functional groups were sown simultaneously were used as controls. During the experiment, the total visible root length and the mean and maximum rooting depth of plant communities were monitored using image analysis and a new methodological approach using deep learning (RootPainter) for root segmentation. At harvest, we measured aboveground (community and species level) and belowground (community level) biomass, and assessed the vertical distribution of the root biomass in different soil layers. At the community level, all scenarios where one functional group was sown before the other two had similar shoot and root productivity. At the species level, two forbs (Achillea millefolium and Centaurea jacea) benefited from arriving early, and one legume (Trifolium pratense) had a disadvantage when it was sown after the grasses. Priority effect treatments also affected the vertical distribution of roots. When grasses were sown first, plant communities rooted more shallowly (lower mean and maximum rooting depth) than when forbs or legumes were sown first. In addition, roots moved down the soil profile more slowly in grasses‐first communities. Our results highlight that plant functional group order of arrival in grassland communities can affect the vertical distribution of roots in the soil and this may have implications for species coexistence.

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Section: Discussionmentioning

confidence: 99%

Assembly history modulates vertical root distribution in a grassland experiment

Alonso‐Crespo

Weidlich

Temperton

et al. 2022

Oikos

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“…It is also noteworthy that the range of modification of susceptibility was at least twofold higher than the one on biomass. Considering that most previous studies focused on the impact of intraspecific neighbours on biomass (Kigathi et al, 2013;Bowsher et al, 2017;Kumar et al, 2020), our finding is advocating for a more systematic evaluation of NMS in competition experiments.…”

Section: Neighbours Change Susceptibility and Gene Expression But Hav...mentioning

confidence: 64%

A major genetic locus in neighbours controls changes of gene expression and susceptibility in intraspecific rice mixtures

et al. 2023

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Summary Reports indicate that intraspecific neighbours alter the physiology of focal plants, and with a few exceptions, their molecular responses to neighbours are unknown. Recently, changes in susceptibility to pathogen resulting from such interactions were demonstrated, a phenomenon called neighbour‐modulated susceptibility (NMS). However, the genetics of NMS and the associated molecular responses are largely unexplored. Here, we analysed in rice the modification of biomass and susceptibility to the blast fungus pathogen in the Kitaake focal genotype in the presence of 280 different neighbours. Using genome‐wide association studies, we identified the loci in the neighbour that determine the response in Kitaake. Using a targeted transcriptomic approach, we characterized the molecular responses in focal plants co‐cultivated with various neighbours inducing a reduction in susceptibility. Our study demonstrates that NMS is controlled by one major locus in the rice genome of its neighbour. Furthermore, we show that this locus can be associated with characteristic patterns of gene expression in focal plant. Finally, we propose an hypothesis where Pi could play a role in explaining this case of NMS. Our study sheds light on how plants affect the physiology in their neighbourhood and opens perspectives for understanding plant–plant interactions.

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“…This is likely because at higher levels of nutrient concentration, plants may suffer from strong intraspecific competitions due to rapidly clonal growth. In this case, a longer and bigger root would be more beneficial for the plants to obtain resources in order to fight against their intraspecific competitors [ 11 , 43 , 64 , 66 ].…”

Section: Discussionmentioning

confidence: 99%

“…Plants can respond to varying resources through changing biomass allocations to above- and below-ground organs [ 67 , 68 ]. In general, many terrestrial plants would allocate more biomass to below-ground organs under low-nutrient soils [ 66 , 69 – 71 ], and this is also frequently observed for many aquatic macrophytes [ 72 , 73 ]. We also observed a greater root to shoot ratio at lower nutrient concentrations in the floating clonal plant S .…”

Section: Discussionmentioning

confidence: 99%

Distinct responses of frond and root to increasing nutrient availability in a floating clonal plant

Jin

Zhang

et al. 2021

PLoS ONE

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Current knowledge on responses of aquatic clonal plants to resource availability is largely based on studies manipulating limited resource levels, which may have failed to capture the “big picture” for aquatic clonal plants in response to resource availability. In a greenhouse experiment, we grew the floating clonal plant Spirodela polyrhiza under ten nutrient levels (i.e., 1/64×, 1/32×, 1/16×, 1/8×, 1/4×, 1/2×, 1×, 2×, 4× and 8×full-strength Hoagland solution) and examined their responses in terms of clonal growth, morphology and biomass allocations. The responses of total biomass and number of ramets to nutrient availability were unimodal. A similar pattern was found for frond mass, frond length and frond width, even though area per frond and specific frond area fluctuated greatly in response to nutrient availability. In contrast, the responses of root mass and root length to nutrient availability were U-shaped. Moreover, S. polyrhiza invested more to roots under lower nutrient concentrations. These results suggest that nutrient availability may have distinct influences on roots and fronds of the aquatic clonal plant S. polyrhiza, resulting in a great influence on the whole S. polyrhiza population.

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Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging

Cited by 18 publications

References 70 publications

Assembly history modulates vertical root distribution in a grassland experiment

Assembly history modulates vertical root distribution in a grassland experiment

A major genetic locus in neighbours controls changes of gene expression and susceptibility in intraspecific rice mixtures

Distinct responses of frond and root to increasing nutrient availability in a floating clonal plant

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