Differential distribution of leaf chemistry in eucalypt seedlings due to variation in whole-plant nutrient availability

2005 ◽  
Vol 66 (2) ◽  
pp. 215-221 ◽  
Author(s):  
Dugald C. Close ◽  
Clare McArthur ◽  
Ann E. Hagerman ◽  
Hugh Fitzgerald
Keyword(s):  
Nutrient Availability ◽  
Plant Nutrient ◽  
Leaf Chemistry ◽  
Differential Distribution ◽  
Whole Plant

scholarly journals Seasonal variation in AMF colonisation, soil and plant nutrient content in gypsum specialist and generalist species growing in P-poor soils

2021 ◽  
Author(s):  
Andreu Cera ◽  
Estephania Duplat ◽  
Gabriel Montserrat-Martí ◽  
Antonio Gómez-Bolea ◽  
Susana Rodríguez-Echeverría ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Nutrient Availability ◽  
Soil Nutrient ◽  
Nutrient Status ◽  
Nutrient Content ◽  
P Availability ◽  
Plant Nutrient ◽  
Rhizospheric Soil ◽  
Soil Nutrient Availability ◽  
Generalist Species

Abstract Aims Gypsum soils are P-limited atypical soils that harbour a rich endemic flora. These singular soils are usually found in drylands, where plant activity and soil nutrient availability are seasonal. No previous studies have analysed the seasonality of P nutrition and its interaction with the arbuscular mycorrhiza fungi (AMF) colonisation in gypsum plants. Our aim was to evaluate the seasonal changes in plant nutrient status, AMF colonisation and rhizospheric soil nutrient availability in gypsum specialist and generalist species. Methods We evaluated seasonal variation in the proportion of root length colonised by AMF structures (hyphae, vesicules and arbuscules), plant nutrient status (leaf C, N and P and fine root C and N) and rhizospheric soil content (P, organic matter, nitrate and ammonium) of three gypsum specialists and two generalists throughout a year. Results All species showed arbuscules within roots, including species of Caryophyllaceae and Brassicaceae. Root colonisation by arbuscules (AC) was higher in spring than in other seasons, when plants showed high leaf P-requirements. Higher AC was decoupled from inorganic N and P availability in rhizospheric soil, and foliar nutrient content. Generalists showed higher AC than specialists, but only in spring. Conclusions Seasonality was found in AMF colonisation, rhizospheric soil content and plant nutrient status. The mutualism between plants and AMF was highest in spring, when P-requirements are higher for plants, especially in generalists. However, AMF decoupled from plant demands in autumn, when nutrient availability increases in rhizospheric soil.

scholarly journals Whole‐plant optimality predicts changes in leaf nitrogen under variable CO 2 and nutrient availability

2019 ◽  
Vol 225 (6) ◽  
pp. 2331-2346 ◽  
Author(s):  
Silvia Caldararu ◽  
Tea Thum ◽  
Lin Yu ◽  
Sönke Zaehle
Keyword(s):  
Nutrient Availability ◽  
Leaf Nitrogen ◽  
Whole Plant

scholarly journals Plant–herbivore–decomposer stoichiometric mismatches and nutrient cycling in ecosystems

2013 ◽  
Vol 280 (1754) ◽  
pp. 20122453 ◽  
Author(s):  
Mehdi Cherif ◽  
Michel Loreau
Keyword(s):  
Nutrient Availability ◽  
Conceptual Models ◽  
Nutrient Content ◽  
Major Influence ◽  
Plant Nutrient ◽  
Nutrient Contents ◽  
Nutrient Excretion ◽  
Plant Herbivore ◽  
The Impact ◽  
The Relationship

Plant stoichiometry is thought to have a major influence on how herbivores affect nutrient availability in ecosystems. Most conceptual models predict that plants with high nutrient contents increase nutrient excretion by herbivores, in turn raising nutrient availability. To test this hypothesis, we built a stoichiometrically explicit model that includes a simple but thorough description of the processes of herbivory and decomposition. Our results challenge traditional views of herbivore impacts on nutrient availability in many ways. They show that the relationship between plant nutrient content and the impact of herbivores predicted by conceptual models holds only at high plant nutrient contents. At low plant nutrient contents, the impact of herbivores is mediated by the mineralization/immobilization of nutrients by decomposers and by the type of resource limiting the growth of decomposers. Both parameters are functions of the mismatch between plant and decomposer stoichiometries. Our work provides new predictions about the impacts of herbivores on ecosystem fertility that depend on critical interactions between plant, herbivore and decomposer stoichiometries in ecosystems.

Establishment growth and bud-bank formation in Epilobium angustifolium: the effects of nutrient availability, plant injury, and environmental heterogeneity

Botany ◽  
2009 ◽  
Vol 87 (2) ◽  
pp. 195-201 ◽  
Author(s):  
Jitka Klimešová ◽  
Adéla Pokorná ◽  
Leoš Klimeš
Keyword(s):  
Nutrient Availability ◽  
Root Biomass ◽  
Soil Heterogeneity ◽  
Bud Bank ◽  
Vegetative Regeneration ◽  
Whole Plant ◽  
Epilobium Angustifolium ◽  
Response To Stress ◽  
Plant Life Cycle ◽  
Plant Injury

Plant establishment is a risky phase of the plant life cycle because juvenile individuals cannot produce seeds and their vegetative regeneration is constrained by a lack of reserve meristems and carbon storage. On the other hand, conditions in the period following establishment, during establishment growth, affect the vegetative regeneration and clonal growth of the plant in the future. Bud-bank formation was studied in a root-sprouting clonal herb Epilobium angustifolium  L. (= Chamaenerion angustifolium (L.) Scop.), a plant with root buds differing in size and number of leaf primordia, during establishment growth. We tested two hypotheses: (i) large and small buds differ in their response to stress and disturbance, and (ii) a heterogeneous soil environment does not affect bud-bank formation. We rejected both hypotheses because (i) the proportion of small buds was about 80% and was not affected by nutrient availability and substrate heterogeneity, and (ii) plants produced more buds per root biomass under conditions of nutrient shortage in both homogeneous and heterogeneous substrates, but the effect was masked by lower root biomass. Thus, bud production for the whole plant was not affected by either nutrient availability or soil heterogeneity and reached 20 to 100 buds per plant.

Can the shrub Chromolaena odorata (Asteraceae) be considered as improving soil biology and plant nutrient availability?

2012 ◽  
Vol 85 (2) ◽  
pp. 233-245 ◽  
Author(s):  
Armand W. Koné ◽  
Ettien F. Edoukou ◽  
Jean T. Gonnety ◽  
Aurélie N. A. N’Dri ◽  
Laurenza F. E. Assémien ◽  
...  
Keyword(s):  
Nutrient Availability ◽  
Soil Biology ◽  
Plant Nutrient ◽  
Chromolaena Odorata
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