Phloem loading and unloading of sugars and amino acids
نویسندگان
چکیده
منابع مشابه
Phloem Unloading of Amino Acids at the Site of Attachment of Cuscuta europaea.
By washing out (14)C-solutes or (3)H-solutes in 0.5 mm CaSO(4) during a period of 5 to 6 hours, the release of amino acids by excised stem segments of broad bean (Vicia faba L. cv Witkiem) was studied. Three hours after pulse labeling with l-valine, l-asparagine, or alpha-aminoisobutyric acid (AIB), hollow stem segments were excised from the plant and incubated in a washout solution.In experime...
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The importance of biomolecules is well recognized nowadays, owing to their application in many industrial processes, particularly in the food, pharmaceutical, and cosmetic industries. Amino acids, carbohydrates, and proteins are the three types of biomolecules considered in this review. Solubilities of several amino acids and sugars have been measured in water and, more recently, in mixed solve...
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Radioactive sucrose, l-leucine, l-glutamate, and gamma-aminobutyrate were applied exogenously to abraded areas of soybean leaves. The three amino acids were translocated with similar velocities and mass transfer rates on a molar basis, although they were metabolized differently in the sink tissue. The concentration dependence of leucine translocation showed a triphasic saturation response, whil...
متن کاملWhat is Phloem unloading?
Several studies of phloem unloading have failed to distinguish between transport events occurring at the sieve element/companion cell boundary and subsequent short-distance transport through parenchyma cells. Indirect evidence has been obtained for symplastic unloading in storage and utilization sinks. In other sinks transfer to the apoplast may occur, but not necessarily at the sieve element/c...
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گوشت قرمز یکی از مهم ترین فرآورده های دامی در تأمین پروتئین و انرژی می باشد که در حمل ویتامین های محلول در چربی نیز حائز اهمیت می باشد. انسان مانند سایر مهره داران اسید های چرب ضروری (لینولئیک و آلفا لینولنیک) مورد نیاز خود از طریق غذا تأمین می نماید. اسید های چرب ضروی پیش ساز اسید های چرب غیر اشباع با چند پیوند دوگانه هستند. اسید لینولنیک پیش ساز اسیدهای چرب امگا 3 و اسید لینولئیک نیز پیش ساز ...
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ژورنال
عنوان ژورنال: Plant, Cell & Environment
سال: 2003
ISSN: 0140-7791
DOI: 10.1046/j.1365-3040.2003.00847.x