EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Carbohydrate sources and sinks in woody plants


, : Carbohydrate sources and sinks in woody plants. Botanical Review. 58(2): 107-222

Each perennial woody plant is a highly integrated system of competing carbohydrate sinks (utilization sites). Internal competition for carbohydrates is shown by changes in rates of carbohydrate movement from sources to sinks and reversals in direction of carbohydrate transport as the relative sink strengths of various organs change. Most carbohydrates are produced in foliage leaves but some are synthesized in cotyledons, hypocotyls, buds, twigs, stems, flowers, fruits, and strobili. Although the bulk of the carbohydrate pool moves to sinks through the phloem, some carbohydrates are obtained by sinks from the xylem sap. Sugars are actively accumulated in the phloem and move passively to sinks along a concentration gradient. The dry weight of a mature woody plant represents only a small proportion of the photosynthate it produced. This discrepancy results not only from consumption of plant tissues by herbivores and shedding of plant parts, but also from depletion of carbohydrates by respiration, leaching, exudation, secretion, translocation to other plants through root grafts and mycorrhizae and losses to parasites. Large spatial and temporal variations occur in the use of reserve- and currently produced carbohydrates in metabolism and growth of shoots, stems, roots, and reproductive structures. A portion of the carbohydrate pool is diverted for production of chemicals involved in defense against fungi, herbivores, and competing plants. Woody plants accumulate carbohydrates during periods of excess production and deplete carbohydrates when the rate of utilization exceeds the rate of production. Stored carbohydrates play an important role in metabolism, growth, defense, cold hardiness, and postponement or prevention of plant mortality.

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 002042929

DOI: 10.1007/bf02858600

PDF Full Text: Carbohydrate sources and sinks in woody plants


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Morelli, K., A.; Revaldaves, E.; Oliveira, C.; Foresti, F., 2007: Isolation and characterization of eight microsatellite loci in Leporinus macrocephalus (Characiformes : Anostomidae) and cross-species amplification. Leporinus macrocephalus is a species endemic to the Paraguay River basin and an important fishery resource, as well as a valuable species in aquaculture programs. A total of eight polymorphic microsatellite loci were isolated and characterized. A...

James, F. C., 1965: Central southern region Regional reports. Winter season. December 1, 1964-March 31, 1965. Audubon Field Notes, 19: 385-388

Nomura, T., 1994: Modification of forms of birth certificates and death certificates. Japanese Journal of Nursing 46(12): 184-191

Anonymous, 1985: Sterile bromegrass: a weed that is spreading. Cultivar (187) 28-29

Carrari, F.; Urbanczyk-Wochniak, E.; Willmitzer, L.; Fernie, A.R., 2003: Engineering central metabolism in crop species: learning the system. Over many centuries much effort has been expended on crop improvement, most recently by use of molecular genetic technologies. Although genome sequence information for crop species is not yet available in the public domain, most of the genes of ce...

Cohen, D.A.; Taylor, S.L.; Zonta, M.; Vestal, K.D.; Schuster, M.A., 2007: Availability of high school extracurricular sports programs and high-risk behaviors. The Surgeon General has called for an expansion of school-based extracurricular sports programs to address the obesity epidemic. However, little is known about the availability of and participation in high school extracurricular sports and how par...

Rosenblum M.G.; Hortobagyi G.N.; Wingender W.; Hersh E.M., 1984: Analysis of the anti tumor agent bay i 7433 copovithane in plasma and urine by high performance liquid chromatography. Copovithane (BAYi7433) is a synthetic polymer of MW 7800 daltons with antitumor activity. An analytical method for copovithane in biological fluids involving organic extraction and hydrolysis and TNBS [trinitrobenzene sulfonic acid] derivitization...

Loppert, H.; Broda, E., 1973: Adenosine triphosphate content and adenosine triphosphate turnover in Chlorella as a function of illumination and aerobiosis. Zeitschrift feur allgemeine Mikrobiologie: 3 (6) 499-506

Karim, R.Z.; Ma-Wyatt, J.; Cox, M.; Scolyer, R.A., 2004: Myoid angioendothelioma of the spleen. Although vascular neoplasms of the spleen are rare, they are the most common nonhemopoietic proliferation of the organ, and include hemangiomas, lymphangiomas, hamartomas, littoral cell angiomas, hemangioendotheliomas, and angiosarcomas, as well a...

Goh, P.Y.; Surana, U., 1999: Cdc4, a protein required for the onset of S phase, serves an essential function during G(2)/M transition in Saccharomyces cerevisiae. Saccharomyces cerevisiae proteins Cdc4 and Cdc20 contain WD40 repeats and participate in proteolytic processes. However, they are thought to act at two different stages of the cell cycle: Cdc4 is involved in the proteolysis of the Cdk inhibitor, S...