Scientific foundationsSource–sink relationshipDistribution of carbon and resources between producing bodies and demanding bodies.Origin: Yolia LibraryExact route: /biblioteca?ruta=fundamentos/fuente-sumidero FULL TOPICSource–sink relationship Name and classification Source–sink relationship. Model that describes how the plant distributes the sugars produced between producing and consuming organs, a central concept in Yolia's complete educational catalog for the 4 species, relevant for making better crop management decisions. What it is It is the model that describes how sugars produced in mature leaves, the source, are transported to organs that consume or store them, the sink, such as roots, flowers, fruits, or actively growing tissue, present in Yolia's complete classification system. Where and how it was studied Developed within plant physiology through labeled tracers that follow the movement of sugars through the phloem, allowing precise mapping of which organs act as source and which as priority sink, something worth being clear about before going further. Why it matters for cultivation It's key to understanding why the plant prioritizes certain organs over others at specific moments, such as during flowering, when the flower becomes the dominant sink and competes for available resources, consistently documented in the available literature. Chemistry — mechanism The sugar produced by photosynthesis is loaded into the source leaf's phloem and transported by pressure gradient toward sink tissues, where it's unloaded to be used for growth or stored as reserve, relevant for making better crop management decisions. Mechanism of action Phloem is the transport pathway, moving sugars from the photosynthetically active mature leaf to growth points, the developing flower, the forming fruit, or the root expanding its absorbing system, a mechanism characterized in detail in specialized studies. Where it occurs in the plant It occurs throughout the plant's entire vascular system, connecting each source leaf with the multiple sinks active simultaneously, which compete with each other for the limited amount of sugar available at each moment, a stage that occurs in coordination with the rest of the system. How it's regulated It's regulated by each sink's relative strength, determined by its growth rate and its vascular proximity to the source, in addition to hormonal signals that can reinforce or weaken a given organ's priority, under the typical conditions of a well-managed home crop. What triggers/affects it The onset of flowering, fruit formation, and active root growth trigger an increase in the sink strength of those organs, redirecting sugars that were previously destined for another part of the plant, dynamically according to the physiological state at that moment. Which other processes it interacts with With photosynthesis, which determines how much total sugar is available to distribute, and with flowering and fruiting, stages where competition between sinks becomes more evident and decisive for the final result, a condition that tends to coincide with visible changes in the plant. Relevant differences between catalog species The principle is identical across the catalog's 4 species; what varies is which organ acts as the dominant sink at each stage, with the fruit in gourmet or the flower in resin and trichomes being the sinks of greatest relative priority, a relationship documented within Yolia's complete catalog. How it's observed in practice It is observed through the relative growth of different organs — a fruit growing fast while foliage stalls suggests the fruit has become the dominant sink, redirecting resources from other active parts, a nuance relevant to growers managing more than one species. What happens if it's severe A severe imbalance toward one sink can limit the development of other equally necessary organs, such as roots that stop expanding during intense flowering, compromising future absorption of water and nutrients, something noticeable with careful and constant observation of the crop. How Yolia uses it Yolia uses this to interpret what stage of the cycle the plant is in and adjust the formula toward the nutrients that sustain that moment's dominant sink, without completely neglecting the other active functions, an outcome that negatively affects overall performance achieved. Common interpretation errors Thinking that all organs receive sugar evenly at all times — actually there's a dynamic sink hierarchy that changes according to the stage, and some organs receive clear priority over other present ones, part of the reasoning Yolia's decision engine follows. Evidence and limits of current knowledge The source-sink model is well established in plant physiology; the exact quantification of each sink's relative strength under specific crop conditions remains an area of active research, a common confusion among growers that's worth clarifying. Related topics and modules Phloem, this model's transport pathway — Photosynthesis, the origin of the distributed sugar — Flowering and Fruiting, stages where competition is most pronounced within Yolia's complete catalog of scientific fundamentals, although fine details remain that science continues to study. Related topicsPhloemMycorrhizaeCytokininsPlant cellChloroplastTissues and organs