Nutrient uptake affinity affects the competitive ability of microbial organisms at low nutrient concentrations. From the theory of diffusion limitation it follows that uptake affinity scales linearly with the cell radius. This is in conflict with some observations suggesting that uptake affinity scales to a quantity that is closer to the square of the radius, i.e., to cell surface area. We show...

Fruit development, from its early stages, is the result of a complex network of interacting processes, on different scales. These include cell division, cell expansion but also nutrient transport from the plant, and exchanges with the environment. In the presence of nutrient limitation, in particular, the plant reacts as a whole, by modifying its architecture, metabolism, and reproductive strat...

Despite its pivotal feedback to carbon cycling, representing the dynamic response of vegetation nitrogen limitation is a key challenge for simulating terrestrial sink with land models. Here, we explore representation this novel biological fixation and cycling in Canadian Land Surface Scheme Including Biogeochemical Cycles. First, assess how incorporating via influences CO2 fertilization experim...

Coconut (Cocos nucifera L.) is a perennial tropical monocotyledon that produces fruit continuously. The physiological function of the large amounts of sucrose stored in coconut stems is unknown. To test the hypothesis that reserve storage and mobilization enable the crop to adjust to variable sink-source relationships at the scale of the whole plant, we investigated the dynamics of dry matter p...

Abstract Zooplankton is a good indicator of water quality state. Analysing the species composition and abundance, it possible to assess condition body predict direction changes. The aim study was analyse zooplankton in shallow urban lake, which restoration limited one method, i.e. wind-aeration. results were compared with earlier data obtained during sustainable (three methods: wind-aeration, p...

The concept of source and sink strength is presently well-recognized and accepted by the scientific community as a pertinent approach describing the mechanisms of carbohydrate partitioning into the different and competing organs at a whole plant or canopy scales. Sink–source relationships have a clear role in the size of sink organs. Besides the effect on organ size, sink/source ratio might also...

individual grain weight of wheat kernels differs with their positions on a spike. cultivation practices (such as fertilizer nitrogen and plant growth regulators application) can be used to improve weight of basal and distal kernels. for this purpose, two experiments based on randomized complete block design were carried out with three replications. the aim of this research was to study the mech...