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Phloem in Biological News

CSHL researchers identify gene that helps plant cells keep communication channels open

... to work were observed by the CSHL team to give rise to seedlings that barely survived more than two weeks, despite forming intact roots and an intact phloem the main transport artery that carries nutrients and other supplies to the meristems. The mutants even had intact meristems that had developed ...

Chloroplast f and m Thioredoxins Discovered in Nonphotosynthetic Tissues

... in plant reproduction, and in other signaling pathways. Thioredoxin h is also thought to be a mobile element in plants transported through the phloem or directly from cell to cell through plasmodesmata and thus may act as a messenger molecule in signaling. Several other types of TRXs have also ...

Agent that triggers immune response in plants is uncovered

... in the infected leaves by binding to SA. "This inactivation allows methyl salicylate to build up," explained Klessig. "It then flows through the phloem (or food-conducting "tubes") to the uninfected tissue, where SABP2 converts it back into active SA, which can now turn on the plant's defenses." ...

Research identifies protein that signals flowering in squash plants

... conditions, and then is transported through the phloem to the floral meristems, where it acts together ... detection and measurement of compounds in phloem sap, and designing experiments to allow accurate ... for the analysis of translocation through the phloem stream have been developed in this system. ...

Quick identification needed to save Florida's citrus industry from devastating disease

... by this disease, say plant pathologists with The American Phytopathological Society (APS). Citrus greening is a bacterial disease that affects the phloem system of citrus plants causing the infected trees to yellow, decline, and possibly die within a few years. The bacterium is spread by an insect, the ...
Phloem in Biological Definition

Phloem

... In vascular plants , phloem is the tissue that carries organic nutrients, particularly sucrose . In trees , the phloem is part of the bark , hence the name, derived ... the Greek word for "bark". See also xylem . phloem sap moves from sugar source s to sugar sink ....

Biological tissue

... and peripheral nervous system Examples of tissue in other multicellular organisms are vascular tissue in plants , such as xylem and phloem . Plant tissues are categorized into the parenchyma , the collenchyma , and the sclerenchyma . ...

Leaf

... examples of pattern formation through ramification. The veins are made up of: xylem , which brings water from the stem into the leaf. phloem , which usually moves sap out, the latter containing the glucose produced by photosynthesis in the leaf. The xylem typically lies over the ....

Xylem

... it constitutes wood ; the word is derived from Greek ξύλον xúlon , "wood, timber". Together with the phloem , the xylem is one of the two types of transport tissues in plants. The cell walls of xylem cells derive most of their strength from lignin , a ...
Phloem in Biological Dictionary

Xylem

... is one of the two types of transport tissue, phloem being the other. The word " xylem " is ... is one of the two types of transport tissue; phloem is ... Xylem is the primary water-conducting tissue and phloem circulates a nutrient ... Xylem . Phloem. ...

Sieve tubes

... are a type of elongated parenchyma cells in phloem tissue. At the ends these cells are connected ... differences between xylem vessel element and phloem sieve tube element? ... sieve tube ... > plant tissues > vascular tissues > phloem > sieve tubes ... ... a complex ...

Secondary xylem

... is one of the two types of transport tissue, phloem being the other. The word " xylem " is ... Pine stem cross-section showing xylem and phloem ... Drimys secondary xylem ray in ... is one of the two types of transport tissue, phloem being the other. ... in secondary xylem , ...

Secondary phloem

... In vascular plants, phloem is the living tissue that carries organic ... parts of the plant where needed. In trees, the phloem is the innermost layer of the bark, hence the ... Aspects of the topic secondary - phloem are discussed in the following places at ...

Phloem

... In vascular plants, phloem is the living tissue that carries organic ... parts of the plant where needed. In trees, the phloem is the innermost layer of the bark, hence the ... phloem ( ) n. The food-conducting tissue of vascular ...

Secondary root

... Growth in Roots ... towards the inside of the root or secondary phloem cells if they divide towards ... below show what secondary growth ... from most monocots and pteridophytes ... then secondary xylem and phloem are laid down evenly around the root ; ... Secondary roots ...

Vascular cambium

... is a lateral meristem in the vascular tissue of plants. The vascular cambium is the source of both the secondary xylem and the secondary phloem (outwards), and is located between these tissues in the stem and root. A few leaves even have a vascular ... Aspects of the topic vascular - ...

Vascular plants

... make up the secondary plant body ... vascular plant n. Any of various plants , such as the ferns and seed-bearing plants , in which the phloem transports sugar and the xylem transports Vascular plants are named from the latin word vasculum, meaning "vessel" or "duct. ... In ...

Vascular bundles

... bundles is associated with collenchyma cells. ... Vascular Bundle -- an area of conducting tissue composed of xylem tissue and phloem tissue. ... more prominent vascular bundles a bundle sheath of parenchyma ... There is also a layer of sclerenchyma around each of the ...

Vascular bundle

... tissue and consists ... the Vascular Bundle . ... Vascular Bundle -- an area of conducting tissue composed of xylem tissue and phloem tissue. ... more prominent vascular bundles a bundle sheath of parenchyma ... Zoom: xylem vessels as part of a vascular bundle ... ...

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