What is sink strength in plants?
Sink strength is defined as the ability of a sink organ to import assimilates for its growth, development and maintenance. I consider that sink strength is a product of sink capacity (not sink size) and sink activity. Sink capacity could be defined more exactly by potential sink growth.
What is fruit sink strength?
Sink strength was estimated from potential fruit growth rate which was determined from non-destructively measuring the fruit growth rate at non-limiting assimilate supply, growing only one fruit on each truss.
Is fruit a source or sink?
A fruit is a sink because it produces very little of all the sugars it requires and depends on a source for all the inorganic nutrients it contains. Vegetables, e.g., spinach leaves are a different matter. Only young leaves are sinks, when they import sugars as well as nutrients.
Are fruits sink cells?
In fact, within a tree, fruits, which are strong sinks, compete for assimilates with each other, especially in case of high crop loads, as well as with vegetative organs, such as shoots, leaves, and roots (Pavel and DeJong, 1993; Ludewig and Flügge, 2013).
What is the relationship between sources and sinks?
Source organs provide a net uptake of resources whilst sink organs have a net drawdown of resources. Molecular mechanisms regulate the relationship between sources and sinks. These molecular mechanisms include carbon- and nitrogen-containing metabolites, plant hormones and genes.
What is sink and source in plants?
The photosynthetically active parts of a plant are referred to as the source. The areas of active growth and areas of storage are referred to as sink in plants. However, a source is not always a source, and a sink is not always a sink.
What is source to sink theory?
The “Source and Sink Theory”, simply indicates that “if there is a source, it must be at least one sink (at the same instance), with a flow pattern from source to the sink, and the process must be conserved”.
What is Source 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 …
Why is a fruit a sink?
Everything is made up of tiny parts called molecules. When vegetables have molecules that are very close together, they are denser than water and they sink. When fruits and vegetables have molecules that are farther apart, they float because they are less dense than water.
What is plant sink?
Sink in plants is the site where the storage of produced food takes place. Thus, the transportation of produced food in the source will end up in the sink. Therefore, the end point of phloem translocation is the sink. The phloem will unload its contents at the point of the sink.
What is the difference 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.