+ Site Statistics
+ 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


Click here to order any other PDF Full Text

Accession: 002042929

DOI: 10.1007/bf02858600

Download 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:

Other references

L.Y.F.; Jiang H B.; W.Y.J.; Liu L L.; Zhou T S., 1990: Improved synthesis of fluconazole and its analogues. In the synthesis of antifungal agent fluconazole, arylmagnesium bromide was formed under the radiation of ultrasound. 1H-1,2,4-triazole was alkylated in the presence of PEG600 as a phase transfer catalyst.

Gollwitzer Meier, K.L.; Jungmann, H., 1952: The cardiac activity of several peripheral vasodilator sympathomimetic drugs. The cardiac activity of phenylbutylsuprifen and phenyl-butylepinephrine, 2 compounds with peripheral vasodilator activity, was detd. in a canine denervated heart-lung prepn. Drugs were given intraven. in the superior vena cava in doses of 0.015-0....

Yushmanov, V.E.; Wang, L.; Liachenko, S.; Tang, P.; Xu, Y., 2002: ADC characterization of region-specific response to cerebral perfusion deficit in rats by MRI at 9.4 T. Region-specific cerebral blood flow (CBF) and apparent diffusion coefficient (ADC) of water in the rat brain were quantified in vivo by high-field MRI (9.4 T) for 6-7 h after middle cerebral artery occlusion (MCAO). Upon occlusion, average CBF fel...

FLETCHER, E.D., 1949: Visual acuity and safe driving. Journal of the American Optometric Association 20(7): 439-442

SOMERVILLE, A., 1948: Control of surgery and operative obstetrics. Canadian Hospital 25(2): 37-37

Inoue, K.; Maurer, T.; Yamada, H.; Herrmann, C.; Horn, G.; Kalbitzer, H.R.; Akasaka, K., 2001: High-pressure NMR study of the complex of a GTPase Rap1A with its effector RalGDS. A conformational switch in RalGDS revealed from non-linear pressure shifts. Unusually large non-linear 1H and 15N nuclear magnetic resonance chemical shifts against pressure have been detected for individual amide groups of the Ras-binding domain of Ral guanine dissociation stimulator (GDS). The non-linear response is lar...

Wondrack, L.; Duignan, J.; Sutcliffe, J., 1993: The effects of atypical tetracyclines on Escherichia coli cells. Abstracts of the General Meeting of the American Society for Microbiology 93(0): 25

Bhamra, G.; Palin, W.M.; Fleming, G.J.P., 2002: The effect of surface roughness on the flexure strength of an alumina reinforced all-ceramic crown material. The aim of the current study was to assess the contribution of surface defects to early failures. Specific surface flaw distributions were introduced to a series of nominally identical standard disc shaped specimens to assess the contribution of s...

Unger, M.J., 1993: Physicians alone cannot reform health care. Wisconsin Medical Journal 92(5): 236, 238-236, 238

JINDRA.A.; POHORSKY.J., 1950: Ion transfer in determination of alkaloid salts and galenic preparations. Casopis Ceskeho Lekarnictva 63(5-6): 57-75