Determinants of healthy ageing: a systematic review of contemporary literature.

Background: Healthy ageing frameworks have been highly explored. Our objective was to assess existing frameworks for healthy ageing and to identify commonly described factors that can potentially act as determinants of healthy ageing.

Methods: We carried out a systematic review by searching five electronic databases (EMBASE, MEDLINE, Cochrane, PsychINFO, and CINAHL) from January 2010 to November 2020 to capture contemporary evidence.

Leaf allocation patterns and 13C and 15N natural abundances of tropical lianas (Passiflora sp.) as dependent on external climbing support.

The transformation from self-supporting lianas to host-supported climbing lianas is related to re-allocation of biomass and nutrients among plant organs. Therefore, first, variations in leaf mass per area (LMA), leaf carbon and nitrogen allocation and (13)C and (15)N natural abundances were analysed among three tropical Passiflora species (P. edulis, P.

Below-ground partitioning (14C) and isotopic fractionation (delta13C) of carbon recently assimilated by maize.

Partitioning of carbon recently assimilated by maize between shoots, roots, exudates, and CO2 from root respiration depending on three different levels of nutrient supply (full nutrient solution (NS), 10 times diluted NS, or deionised water) was estimated by 14C pulse labelling. A 13C fractionation in these compartments was investigated in relation to the nutrient supply. With decreasing nutrient supply, 14C allocation to the shoots and to the roots decreased from 76 % to 69 % and increased from 8 % to 13 % of 14C recovery, respectively.