What is source-sink concept?
In crop plants, the physiological basis of dry matter production is dependent on the source-sink concept, where the source is the potential capacity for photosynthesis and the sink is the potential capacity to utilize the photosynthetic products.
What is the sink in source to sink?
‘Source’ is the part of a plant where substances are produced (e.g. leaves for sucrose, amino acids) or enter the plant. ‘Sink’ refers to the part of the plant where the substrate can be stored (e.g. roots or stem for starch).
What is source and sink relationship?
Source-sink relationships reflect the interplay between the main factors influencing source current (the rate of rise of the upstroke and amplitude of the action potential) and those that influence the current requirements of the sink (the membrane resistance, the difference between the resting and threshold potentials …
What is source and sink example?
Difference between Source and Sink in Plants
|Source in Plants||Sink in Plants|
|The leaves act as a source in fully grown plants.||Seeds, fruits, flowers, roots and storage organs act as sinks in fully grown plants.|
What is Source sink relationship in phloem?
Article Shared by. ADVERTISEMENTS: In this article we will discuss about the Flow of Source and Sink in Phloem Translocation. It is the long distance movement of organic substances from the source or supply end (region of manufacture or storage) to the region of utilization or sink.
Which act is both source and sink?
Answer: Some organs are both a source and sink. Leaves are sinks when growing and sources when photosynthesizing. Rhizomes are sinks when growing but become sources in the spring when they provide energy for new growth.
What is meant by source and sink in biology?
Source and sink are important concepts in phloem translocation. Source refers to the site where plants produce their food using photosynthesis. In contrast, sink refers to the site where the plant stores the produced food. Therefore, this is the key difference between source and sink in plants.
What is source sink in plants?
What is the source and sink hypothesis?
Source–sink theory is an ecological framework that describes how site and habitat-specific demographic rates and patch connectivity can explain population structure and persistence across heterogeneous landscapes.
Which are examples of source and sink cells in a plant?
Sources: Photosynthetic tissues – mature green leaves – green stems. Storage organs that are unloading their stores – storage tissues in germinating seeds – tap roots or tubers at the start of the growth session. Sinks: Roots that are growing or absorbing mineral ions using energy from cell respiration.
Which of the following acts sink?
Seeds store food for the embryo. Seed store food in endosperm or cotyledons. Hence, seeds serve as sink.
What is the difference between sink and source?
Sink and Source are terms used to define the flow of direct current in an electric circuit. A sinking input or output circuit provides a path to ground for the electric load. A sourcing input or output provides the voltage source for the electric load.
What is the Convention for data sources and sinks?
Figure 4.15: Convention for data sources and sinks. Almost all devices on a network will produce and accept data, acting as both data sources and data sinks, although some device will typically act as either a source or a sink. In addition, a device may be primarily a data source or sink for a particular application.
What is an example of a data source and sink?
In addition, a device may be primarily a data source or sink for a particular application. Some examples of data sources are devices that do a lot of computing or processing and generate large amounts of information, such as computing servers, mainframes, parallel systems, or computing clusters.
What is the pathway of current from source to sink?
The current provided by the source must reach the sink. The pathway between the source and the sink includes intracellular resistance (provided by the cytoplasm) and intercellular resistance (provided by the gap junctions). Extracellular resistance plays a role, but it can often be neglected.