Journal of Experimental Botany | Year: 2010
Within the last two decades, a series of papers have dealt with the effects of nutrition and nutrient deficiency, as well as salt stress, on the long-distance transport and partitioning of nutrients in castor bean. Flows in xylem and phloem were modelled according to an empirically-based modelling technique that permits additional quantification of the uptake and incorporation into plant organs. In the present paper these data were statistically re-evaluated, and new correlations are presented. Numerous relationships between different compartments and transport processes for single elements, but also between elements, were detected. These correlations revealed different selectivities for ions in bulk net transport. Generally, increasing chemical concentration gradients for mineral nutrients from the rhizosphere to the root and from the xylem to leaf tissue were observed, while such gradients decreased from root tissue to the xylem and from leaves to the phloem. These studies showed that, for the partitioning of nutrients within a plant, the correlated interactions of uptake, xylem and phloem flow, as well as loading and unloading of solutes from transport systems, are of central importance. For essential nutrients, tight correlations between uptake, xylem and phloem flow, and the resulting partitioning of elements, were observed, which allows the stating of general models. For non-essential ions like Na+ or Cl-, a statistically significant dependence of xylem transport on uptake was not detected. The central role of the phloem for adjusting, but also signalling, of nutrition status is discussed, since strong correlations between leaf nutrient concentrations and those in phloem saps were observed. In addition, negative correlations between phloem sap sugar concentration and net-photosynthesis, growth, and uptake of nutrients were demonstrated. The question remains whether this is only a consequence of an insufficient use of carbohydrates in plants or a ubiquitous signal for stress in plants. In general, high sugar concentrations in phloem saps indicate (nutritional) stress, and high nutrient concentrations in phloem saps indicate nutritional sufficiency of leaf tissues.
Adp | Date: 2015-04-17
A method of distributing a content object within a profile-based workflow system. A measure of relevance between the content object and an employer personnel is identified. The measure of relevance is based on interest indicated by the employer personnel in relevant topics of the content object. A reviewer-indicated potential value of the content object is identified. The reviewer-indicated potential value is measured by a determination of a degree to which the content object is distributed to additional employer personnel. The content object is displayed to the employer personnel based on the reviewer-indicated potential value and the measure of relevance.
Adp | Date: 2015-05-28
A method of representing relationships among a plurality of entities based on analysis of on-line activity of the entities is provided. A computer system receives identity information for at least one entity for determining activity-based relationships. The computer system captures on-line activity data of the at least one entity. The computer system analyzes the activity data to identify other entities and subjects of interest. The computer system determines relationship activity metrics. The computer system presents, on a graphical display system based on the relationship activity metrics, the at least one entity, the other entities, and the subjects of interest as a set of nodes in an Activity-based connection diagram with relationship activity metrics. The computer system then presents, on a graphical display system based on the relationship activity metrics, connections among the nodes in the activity-based connection diagram.
Adp | Date: 2015-04-02
A method and apparatus for generating a profile page. A computer system identifies a group of potential profiles images from an image. The computer system identifies a group of features in the image. The computer system generates the profile page based on a potential profile image selected from the group of potential profile images and the group of features in the image. The computer system displays the profile page on a display system, enabling generating the profile page.
Adp | Date: 2015-04-02
A method and apparatus for facilitating networking in a social network. A computer system identifies a group of features in an image for a person in the social network. The computer system also identifies a characteristic for networking from the group of features. Further, the computer system identifies a set of people in the social network having the characteristic. The computer system also performs an action enabling networking in the social network with respect to the person and the set of people in the social network having the characteristic.