Translocation: Transport from Source to Sink. Photosynthates, such as sucrose, are produced in the mesophyll cells of photosynthesizing leaves. From there they are translocated through the phloem to where they are used or stored. Mesophyll cells are connected by cytoplasmic channels called plasmodesmata.
‘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). Examples. Sources: Leaves – sucrose is produced here.
Subsequently, What is a source in biology?
Primary sources are information or literature about original research. These materials are provided or written by the original researchers or scientists who conducted the experiment. Examples of Primary Sources include: Journal articles of original research. Lab Notebook.
Also, What is a source and sink in biology?
‘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 are the 3 types of sources?
In general, there are three types of resources or sources of information: primary, secondary, and tertiary. It is important to understand these types and to know what type is appropriate for your coursework prior to searching for information.
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What are source cells and sink cells?
Source cells are cells that produce sugars and pump them into the phloem, whereas sink cells are cells that do not make enough sugars for their own growth and metabolism and must import them from the phloem. The mechanism of phloem translocation is described in a model of phloem function called the pressure flow model.
What is source and sink in biology?
‘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 a sink in biology?
Sugars move from “source” to “sink” … The points of sugar delivery, such as roots, young shoots, and developing seeds, are called sinks. Sinks include areas of active growth (apical and lateral meristems, developing leaves, flowers, seeds, and fruits) or areas of sugar storage (roots, tubers, and bulbs).
What is the source to sink theory?
Source–sink dynamics is a theoretical model used by ecologists to describe how variation in habitat quality may affect the population growth or decline of organisms. Since quality is likely to vary among patches of habitat, it is important to consider how a low quality patch might affect a population.
What are the 3 primary sources?
– archives and manuscript material.
– photographs, audio recordings, video recordings, films.
– journals, letters and diaries.
– speeches.
– scrapbooks.
– published books, newspapers and magazine clippings published at the time.
– government publications.
– oral histories.
What are two examples of a source?
– archives and manuscript material.
– photographs, audio recordings, video recordings, films.
– journals, letters and diaries.
– speeches.
– scrapbooks.
– published books, newspapers and magazine clippings published at the time.
– government publications.
– oral histories.
What are 3 secondary sources?
– journal articles that comment on or analyse research.
– textbooks.
– dictionaries and encyclopaedias.
– books that interpret, analyse.
– political commentary.
– biographies.
– dissertations.
– newspaper editorial/opinion pieces.
What are 4 secondary sources?
– Scholarly Journal Articles. Use these and books exclusively for writing Literature Reviews.
– Magazines.
– Reports.
– Encyclopedias.
– Handbooks.
– Dictionaries.
– Documentaries.
– Newspapers.
What is the source of sucrose in plants?
‘Sugar’ is sucrose, naturally made in all green plants through the process of photosynthesis. Sugars in Fruits and Vegetables. Sucrose is found in fruits and vegetables, and is purified from sugar cane and sugar beets for use in cooking and food production.
What is source and sink in translocation?
Translocation is the movement of organic compounds (e.g. sugars, amino acids) from sources to sinks. The source is where the organic compounds are synthesised – this is the photosynthetic tissues (leaves) The sink is where the compounds are delivered to for use or storage – this includes roots, fruits and seeds.
What would be an example of a secondary source?
Common examples of secondary sources include academic books, journal articles, reviews, essays, and textbooks. Anything that summarizes, evaluates or interprets primary sources can be a secondary source.
What are types of sources?
– Scholarly publications (Journals)
– Popular sources (News and Magazines)
– Professional/Trade sources.
– Books / Book Chapters.
– Conference proceedings.
– Government Documents.
– Theses & Dissertations.
What are five secondary sources?
– Bibliographies.
– Biographical works.
– Reference books, including dictionaries, encyclopedias, and atlases.
– Articles from magazines, journals, and newspapers after the event.
– Literature reviews and review articles (e.g., movie reviews, book reviews)
– History books and other popular or scholarly books.
What is the source in translocation?
Structures that produce photosynthates for the growing plant are referred to as sources. Sugars produced in sources, such as leaves, need to be delivered to growing parts of the plant via the phloem in a process called translocation.
Where are sink cells located?
Sinks include areas of active growth (apical and lateral meristems, developing leaves, flowers, seeds, and fruits) or areas of sugar storage (roots, tubers, and bulbs).
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