phloem

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phloem

a transport tissue characterized by the presence of sieve tubes, companion cells and phloem parenchyma cells, found in the VASCULAR BUNDLES of higher plants. Phloem functions in the transport of dissolved organic substances (e.g. sucrose) by TRANSLOCATION.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

References in periodicals archive ?

Areas of the tissues were obtained as follows: the adaxial surface of the epidermis, the abaxial surface of the epidermis, the chlorophyll parenchyma, the sum of the phloem areas, the average phloem area in one vascular bundle, the sum of the areas of the vascular bundle sheaths, the sum of the areas of the vascular bundles, the sum of the areas of the xylem, the average xylem area in one vascular bundle, the sum of the area of fibers, the average fiber area in one vascular bundle, and the whole leaf area captured in the image using square micrometers as the measurement unit.

Forage potential of Urochloa genotypes by using leaf anatomy/Avaliacao do potencial forrageiro de genotipos de Urochloa por meio da anatomia foliar

The sucrose available for exporting from mesophyll cells is transported through the phloem to the sink organs, where it can be stored as starch in amyloplasts or converted to hexoses (LEMOINE et al., 2013) by invertase (acidic and neutral isoforms) and sucrose synthase (susy) enzymes (STURM; TANG, 1999; WINTER; HUBER, 2000; WELHAM et al., 2009).

The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in Eucalyptus young plants/Os efeitos da deficiencia de magnesio na particao de acucares nao restringem o crescimento de raizes em plantas jovens de eucalipto

Phloem-sucking insects, with long stylets, induce phloem hypertrophy (Figs.

Feeding and Other Gall Facets: Patterns and Determinants in Gall Structure

Branch girdling blocks the phloem flow, making it more nutritive for offspring and future colonizers.

Agrilozodes suarezi (Coleoptera: Buprestidae) as secondary colonizer of a Sclerolobium sp. branch girdled by Oncideres saga (Coleoptera: Cerambycidae)

Collection of pure phloem sap from wheat and its chemical composition.

COMPARATIVE METABOLITE PROFILING OF TWO WHEAT GENOTYPES AS AFFECTED BY NITROGEN STRESS AT SEEDLING STAGE

They showed that in contrast to the late stage, during this early stage young phloem cells (protophloem) are initiating and organising the primary (procambial) stage of radial growth.

How Trees and Turnips Grow Fatter

There were large, small, and discontinuous sclerenchyma bunches, 3 or 6 rows in secondary phloem of V.

Anatomic Studies on Verbascum pestalozzae Boiss. and Verbascum pycnostachyum Boiss. & Heldr./Verbascum pestalozzae Boiss. ve Verbascum pycnostachyum Boiss. & Heldr. Uzerinde Anatomik Arastirmalar

Furthermore, in the cultivar Revolucion, Finetti Sialer (1990) observed that during the expansion of the feeding site, adjacent phloem cells were displaced or incorporated into the syncytium.

Histopathology of Andean Potato (Solanum tuberosum Andigenum group) varieties parasitized by the false root-knot nematode, Nacobbus aberrans/Histopatologia de variedades de batata andina (Solanum tuberosum grupo Andigenum) parasitadas pelo falso nematoide das galhas, Nacobbus aberrans

(2016) found AM-fungi did not reduce density of a phloem feeder (aphid).

Recent Trend: Is the Role of Arbuscular Mycorrhizal Fungi in Plant-Enemies Performance Biased by Taxon Usage?

Infection by GLRaVs is limited to the phloem, (11) and results in the degeneration of primary phloem tissues in shoots, leaves, and clusters.

Grapevine Leafroll Disease in the East: How big a threat does it pose to the eastern wine grape industry?

Veins are collateral, with the xylem located upper side and phloem located lower side.

The anatomical properties of Scabiosa atropurpurea L. (Caprifoliaceae)

In mature sugarcane stems, sucrose transport follows a predominantly symplastic movement when moving from the phloem into the storage parenchyma cells (Lingle, 1989; Rae et al., 2005; Patrick et al., 2013).