Plants of Distinct Successional Stages Have Different Strategies for Nutrient Acquisition in an Atlantic Rain Forest Ecosystem

Rondina, Artur Berbel Lirio; Tonon, Brenda Cristye; Lescano, Luis Eduardo Azevedo Marques; Hungría, Mariangela; Nogueira, Marco Antônio; Zangaro, Waldemar

doi:10.1086/701353

Cited by 42 publications

(9 citation statements)

References 75 publications

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“…Although we have not observed an increase in root hair incidence, seed inoculation with A. brasilense enhanced root hair length, another effect induced by the auxins secreted by this bacterium (Pitts et al., 1998; Vacheron et al., 2013). Longer root hairs allow a more efficient contact between roots and soil, increasing the plant acquisition of resources from the soil (Gilroy & Jones, 2000; Haling et al., 2013) as well as the plant interaction with other beneficial microorganisms in the rhizosphere (Wheatley & Poole, 2018; Rondina et al., 2019). Seed inoculation with A. brasilense also increased the percentage of roots with a diameter <0.50 mm.…”

Section: Discussionmentioning

confidence: 99%

Improving maize sustainability with partial replacement of N fertilizers by inoculation with Azospirillum brasilense

et al. 2022

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Maize (Zea mays L.) is a major cereal crop worldwide and demands N fertilizers, which can be replaced partially by plant growth-promoting bacteria. In Brazil, inoculants carrying Azospirillum brasilense strains Ab-V5 and Ab-V6 have exponentially grown, but a quantitative study on the replacement of N fertilizer by inoculants is still missing. Under greenhouse conditions, we investigated the effects of A. brasilense cells and metabolites applied via seeds or leaf-sprayed at the V3 growth stage on roots and confirmed strong benefits in traits that improve the uptake of water and nutrients.In the field, 30 trials were performed at 13 sites in Brazil over 10 yr, comparing noninoculated and inoculated maize receiving 0, 50, 75, and 100% (90 kg ha -1 of N) of N fertilizer (urea) applied as side-dress 35 d after emergence. Overall, inoculation significantly increased grain yield by 3.1%. Increases were confirmed in lower and higher yield levels, subtropical and tropical conditions, and clayey and sandy soils, with low and higher soil organic carbon levels. Yield increases due to inoculation were statistically significant at all levels of N fertilizer, except for at 50%. Inoculation with the supply of 75% of N increased yield by 4.6% compared with the noninoculated counterpart and, noteworthy, did not differ statistically from the non-inoculated control receiving 100% of N. These results confirmed the feasibility of replacing 25% of N-fertilizer applied as side-dress by seed inoculation with A. brasilense, besides the possibility of avoiding the emission of 4.95 million Mg of CO 2 -e per year. INTRODUCTIONAccording to the most accepted theory, maize (Zea mays L.) originated in Mesoamerica, more specifically in Mexico, about 7,000 yr ago. From there, the crop spread worldwide, reaching the position of the most produced cereal for humanAbbreviations: CFU, colony-forming units; CO 2 -e, CO 2 equivalents; DAE, days after emergence; DYGS, dextrose yeast glucose sucrose; GHG, greenhouse gases; IAA, indole-acetic acid; NFb, nitrogen-free broth.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Discussionmentioning

confidence: 99%

Improving maize sustainability with partial replacement of N fertilizers by inoculation with Azospirillum brasilense

et al. 2022

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“…Evidence has demonstrated that increased growth is associated with higher mycorrhizal fungi inoculation in late‐successional species compared with pioneer species (Koziol & Bever, 2015; Bachelot et al ., 2018), implying an increased reliance on mycorrhizal fungi and a shift in strategy from more self‐dependent to more symbiosis dependent along the succession sequence. However, species at earlier successional stages have been shown to form closer root–fungal collaborations, whereas species at later successional stages are less colonised by mycorrhizal fungi in P‐limited tropical forests (Zangaro et al ., 2003; Vitousek et al ., 2010; Rondina et al ., 2019). Such contrasting observations for fungal collaboration strategies have confounded the defined role of mycorrhizal fungi in nutrient acquisition among species of different successional groups.…”

Section: Introductionmentioning

confidence: 99%

Complementary belowground strategies underlie species coexistence in an early successional forest

Liu

Yang

et al. 2023

New Phytologist

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Summary Unravelling belowground strategies is critical for understanding species coexistence and successional dynamics; yet, our knowledge of nutrient acquisition strategies of forest species at different successional stages remains limited. We measured morphological (diameter, specific root length, and root tissue density), architectural (branching ratio), physiological (ammonium, nitrate, and glycine uptake rates) root traits, and mycorrhizal colonisation rates of eight coexisting woody species in an early successional plantation forest in subtropical China. By incorporating physiological uptake efficiency, we revealed a bi‐dimensional root economics space comprising of an ‘amount‐efficiency’ dimension represented by morphological and physiological traits, and a ‘self‐symbiosis’ dimension dominated by architectural and mycorrhizal traits. The early pioneer species relied on root–fungal symbiosis, developing densely branched roots with high mycorrhizal colonisation rates for foraging mobile soil nitrate. The late pioneer species invested in roots themselves and allocated effort towards improving uptake efficiency of less‐mobile ammonium. Within the root economics space, the covariation of axes with soil phosphorus availability also distinguished the strategy preference of the two successional groups. These results demonstrate the importance of incorporating physiological uptake efficiency into root economics space, and reveal a trade‐off between expanding soil physical space exploration and improving physiological uptake efficiency for successional species coexistence in forests.

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“…In addition, the late-successional species C. estrellensis has lower mycorrhizal responsiveness when compared to the grass B. brizantha and the early-successional H. popayanensis(Zangaro et al 2013). Seedlings of B. brizantha and H. popayanensis have ne roots with morphological characteristics that provide greater colonization and greater mycorrhizal responsiveness and, therefore, may be more affected by CMN originated from adult B. brizantha(Zangaro et al 2018;Rondina et al 2019).…”

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The common mycorrhizal network originated from Brachiaria brizantha suppresses the growth of seedlings from the grass itself and native trees in shouthern Brazil

Bertagnoli

Filho

Pimenta

et al. 2023

Preprint

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The common mycorrhizal network (CMN) is formed by arbuscular mycorrhizal fungi (AMF) that interconnect plant roots, and promote the exchange of nutrients, water, and signaling compounds, in addition to serving as a mechanism of competition among plants. It was evaluated the influence of CMN, originated from the adult invasive grass Brachiaria brizantha, on the development of seedlings of B. brizantha itself and of the native trees Heliocarpus popayanensis (early-successional) and Cariniana estrellensis (late-successional). The plants were grown in a substrate composed of fertile soil and sterilized sand in a 3:1 ratio, with 640 native AMF spores per gram of soil. The treatments were: 1) Seedlings of B. brizantha, H. popayanensis, and C. estrellensis grew under the influence of CMN originated from adult B. brizantha for 225 days; 2) Ninety days after the influence of CMN, two adult B. brizantha prunings were carried out, the first occurring 90 days after emergence and the second 180 days after the first pruning; 3) Ninety days after the influence of the CMN, the communication network was severed by the weekly rupture of the fungal hyphae; 4) The control treatment consisted of the isolated growth of five seedlings of each species without contact with the CMN. The CMN originated from B. brizantha suppressed the growth of seedlings of the three species. CMN severing completely eliminated the suppressive effects of adult B. brizantha on seedlings. The adult B. brizanta pruning mitigated the negative effects on seedlings, however after regrowth, suppression returned. The seedlings of H. popayanensis connected to the CMN originated from adult B. brizantha died, while the seedlings of C. estrellensis and B. brizantha itself survived, altough suppressed.

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Plants of Distinct Successional Stages Have Different Strategies for Nutrient Acquisition in an Atlantic Rain Forest Ecosystem

Cited by 42 publications

References 75 publications

Improving maize sustainability with partial replacement of N fertilizers by inoculation with Azospirillum brasilense

Improving maize sustainability with partial replacement of N fertilizers by inoculation with Azospirillum brasilense

Complementary belowground strategies underlie species coexistence in an early successional forest

The common mycorrhizal network originated from Brachiaria brizantha suppresses the growth of seedlings from the grass itself and native trees in shouthern Brazil

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