Role of mycorrhizas and root exudates in plant uptake of soil nutrients (calcium, iron, magnesium, and potassium): has the puzzle been completely solved?

The Plant Journal, Год журнала: 2023, Номер 114(6), С. 1227 - 1242

Опубликована: Март 14, 2023

SUMMARY Anthropogenic global change is driving an increase in the frequency and intensity of drought flood events, along with associated imbalances limitation several soil nutrients. In context increasing human population, these impacts represent a global‐scale challenge for biodiversity conservation sustainable crop production to ensure food security. Plants have evolved strategies enhance uptake nutrients under environmental stress conditions; example, symbioses fungi (mycorrhization) rhizosphere release exudates from roots. Although cultivation managed effects limited availability nitrogen (N) phosphorus (P), there evidence plant growth fitness because low other such as metals potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), which may become increasingly limiting productivity change. The roles mycorrhizas on N P been studied intensively; however, our understanding metal less clear still inconsistent. Here, we review literature role root key (N, P, K, Ca, Mg, Fe) potential nutrient deficiencies non‐crop terrestrial ecosystems, identify knowledge gaps future research improve nutrient‐uptake capacity plants.

Язык: Английский

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Microbial competition for phosphorus limits the CO2 response of a mature forest

Nature, Год журнала: 2024, Номер 630(8017), С. 660 - 665

Опубликована: Июнь 5, 2024

Abstract The capacity for terrestrial ecosystems to sequester additional carbon (C) with rising CO 2 concentrations depends on soil nutrient availability 1,2 . Previous evidence suggested that mature forests growing phosphorus (P)-deprived soils had limited extra biomass under elevated (refs. 3–6 ), but uncertainty about ecosystem P cycling and its response represents a crucial bottleneck mechanistic prediction of the land C sink climate change 7 Here, by compiling first comprehensive budget P-limited forest exposed , we show high likelihood captured microorganisms constrains recycling plant uptake. Trees used efficiently, microbial pre-emption mineralized seemed limit trees increased uptake assimilation and, therefore, their C. Plant strategies stimulate uptake, such as increasing rhizosphere release soil, will probably be necessary increase capture into new biomass. Our results identify key mechanisms which limits fertilization tree growth guide development Earth system models predict future long-term storage.

Язык: Английский

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Shifts from an extensive to an intensive root nutrient‐acquisition mode with stand development of three Pinus species

Journal of Ecology, Год журнала: 2024, Номер 112(4), С. 886 - 900

Опубликована: Фев. 20, 2024

Abstract Plant roots employ diverse strategies to acquire soil nutrients, including direct nutrient uptake through absorptive fine and root hairs, scavenging nutrients by forming symbioses with mycorrhizal fungi, mining releasing exudates. However, whether these three are differently coordinated among phylogenetically closely related tree species how this coordination shifts stand development remains largely unclear. To fill knowledge gaps, we measured 13 morphological, architectural, physiological traits tightly nutrient‐acquisition of Pinus ( P. sylvestris var. mongolica , densiflora tabuliformis ) at young (20‐year‐old) mature (50‐year‐old) stages planted in nutrient‐impoverished sandy soils, Northeast China. We found that trees had thinner a higher specific length than across species, indicating become morphologically less efficient ‘do it yourself’ during development. Moreover, stands greater density area index, faster root‐exudation rates, suggesting rely more on expanding volumes scavenge depend exudation ‘mine’ nutrients. The exhibited different the stage; other two ectomycorrhizal colonization rates. Synthesis . Our findings highlight may exhibit suggest shift from an extensive mode depending intensive relying

Язык: Английский

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Mycorrhizal symbiosis alleviates Mn toxicity and downregulates Mn transporter genes in Eucalyptus tereticornis under contrasting soil phosphorus

Plant and Soil, Год журнала: 2023, Номер 489(1-2), С. 361 - 383

Опубликована: Май 8, 2023

Язык: Английский

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Root carboxylate release is common in phosphorus-limited forest ecosystems in China: using leaf manganese concentration as a proxy

Plant and Soil, Год журнала: 2024, Номер unknown

Опубликована: Июнь 19, 2024

Abstract Background and aims Certain plant species release root carboxylates in response to phosphorus (P) limitation; however, the prevalence of exudate P-limited forest ecosystems remains unexplored due challenges field assessment. Methods Manganese (Mn) accumulation mature leaves can indicate presence carboxylate exudates rhizosphere soil. To account for environmental factors such as soil pH, a negative reference that does not is used comparison. In this study, we assessed multiple stands across types different levels P availability northern (Gansu) southern (Guangxi) China. Leaf samples were collected from 188 families representing various life forms, leaf Mn concentration ([Mn]) was analyzed proxy exudation patterns, using Dryopteridaceae reference. Results The results supported our hypotheses [Mn] higher forests China compared P-richer China, even though Additionally, observed with high Guangxi (82%) than Gansu (42%). Conclusion Our findings suggest potential common strategy among plants forests, where are released limitation, possibly ineffective mycorrhizal symbiosis nutrient acquisition. diverse systems exhibit varying availability, leading evolution distinct P-acquisition strategies.

Язык: Английский

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Growing in phosphorus‐impoverished habitats in south‐western Australia: How general are phosphorus‐acquisition and ‐allocation strategies among Proteaceae, Fabaceae and Myrtaceae species?

Plant Cell & Environment, Год журнала: 2024, Номер 47(12), С. 4683 - 4701

Опубликована: Июль 29, 2024

Numerous phosphorus (P)-acquisition and -utilisation strategies have evolved in plants growing severely P-impoverished environments. Although these been well characterised for certain taxa, like Proteaceae, P-poor habitats are by a high biodiversity, we know little about how species other families cope with P scarcity. We compared the P-acquisition leaf P-allocation of Fabaceae Myrtaceae those Proteaceae same habitat. exhibited multiple strategies: P-mining carboxylates or phosphatases, uptake facilitated carboxylate-releasing neighbours, dependence on elevated soil availability after fire. Surprisingly, not all showed photosynthetic P-use efficiency (PPUE). Highly P-efficient positive correlations between PPUE proportion metabolite (enzyme substrates), negative phospholipids (cellular membranes) nucleic acid (mostly ribosomal RNA), while found no less species. Overall, that used wider range than to scarcity, at both rhizosphere level. This knowledge is pivotal better understand mechanisms underlying plant survival nutrient-impoverished biodiverse ecosystems.

Язык: Английский

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Soil microbial community composition and functions are disrupted by fire and land use in a Mediterranean woodland

The Science of The Total Environment, Год журнала: 2023, Номер 895, С. 165088 - 165088

Опубликована: Июнь 24, 2023

The intersection of fire, land use transformations, and climate change is putting Mediterranean climate-type ecosystems at risk soil degradation loss ecosystem services. Ondik et al. (2022b) showed that in a dry sclerophyll woodland South Australia, high severity fire clearing grazing practices impacted both physicochemical biological quality indicators. Building upon the work this study aims to 1) identify properties by management are indirect drivers changes microbial community composition 2) determine whether observed affect functions. Via redundancy analysis, we identified management-induced pH, water repellency, nutrient stoichiometry, total content as significant communities. We then measured basal respiration, substrate induced carbon mineralisation quotient, calculated functional trait distributions among communities linking 16S 18S rRNA sequences respiration modes guilds, respectively. found reduced relative abundance (RA) symbionts, anaerobic bacteria, microaerophilic while increasing RA aerobic bacteria. Furthermore, increased post-fire ectomycorrhizal fungi may have pathogenic load, efficiency, wood saprotrophs, litter, soil, other saprotrophic species adapted grasslands. This shows that, through composition, wildfire affected rates, bacterial prevalence symbiotic bacteria fungi, preference. Having main provide valuable insights into how can impact soils woodland.

Язык: Английский

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Leaf phosphorus allocation to chemical fractions and its seasonal variation in south-western Australia is a species-dependent trait

The Science of The Total Environment, Год журнала: 2023, Номер 901, С. 166395 - 166395

Опубликована: Авг. 18, 2023

South-western Australia is a global biodiversity hotspot and has some of the oldest most phosphorus (P)-impoverished soils in world. Proteaceae one dominant P-efficient plant families there, but it unknown how leaf P concentrations foliar allocation coexisting vary between seasons habitats. To investigate this, we selected 18 species from Proteaceae, Myrtaceae Fabaceae, six each family, two habitats Alison Baird Reserve (32°1'19''S 15°58'52''E) Western Australia. Total nitrogen (N) concentrations, mass per area, photosynthetic rate, pre-dawn water potential fractions were determined for both at end summer (March 2019 early April 2020) winter (September 2019). Soil availability was also site. This very first study that focused on seasonal changes different P-impoverished environments three families. However, contrary to our expectation, found little evidence convergence within season or habitat. Each exhibited specific species-dependent pattern allocation, many showed differences seasons. Native plants south-western converged high P-use efficiency, its own unique way associated with outcome.

Язык: Английский

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Adenanthos species (Proteaceae) in phosphorus-impoverished environments use a variety of phosphorus-acquisition strategies and achieve high-phosphorus-use efficiency

Annals of Botany, Год журнала: 2024, Номер 133(3), С. 483 - 494

Опубликована: Янв. 10, 2024

Soils in south-western Australia are severely phosphorus (P) impoverished, and plants this region have evolved a variety of P-acquisition strategies. Phosphorus acquisition by Adenanthos cygnorum (Proteaceae) is facilitated P-mobilizing neighbours which allows it to extend its range habitats. However, we do not know if other species also exhibit strategy based on facilitation for P P-impoverished environments.

Язык: Английский

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Climate and pedogenesis exert divergent controls on dissolved organic matter during long-term ecosystem development

CATENA, Год журнала: 2025, Номер 254, С. 109004 - 109004

Опубликована: Апрель 5, 2025

Язык: Английский

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