meristem

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meristem

or

meristematic tissue

a region of a plant in which active cell division (MITOSIS) occurs, the cells of the meristem not being differentiated into a specialist form. Meristematic tissues occur at the root and shoot tips (see APICAL MERISTEM giving growth in length, while increase in girth of the plant is produced by the CAMBIUM of VASCULAR BUNDLES and the INTERFASCICULAR CAMBIUM. Note that such specialist dividing zones are not found in animals, where cell division occurs in most tissues.
References in periodicals archive ?
crassipes population growth than adult weevils because larvae tunnel through plant tissues (Cilliers 1991) and can damage meristems (Stark & Goyer 1983; Center et al.
Pastures deferred at elevated heights in the beginning of the fall usually have a greater number of tillers with a remaining apical meristem and, in such condition, photoassimilates are preferentially reallocated for the development and maintenance of the existing tillers (ROBSON et al.
This study showed that Sainfoin meristem explant, BAP and 2,4-D together were important for callogenesis and for regeneration only BAP was effective.
Micropropogation: Lateral meristem explants cultured on MS, containing 3% (w/v) sucrose and 0.
Beyond that, of course, is the possibility of the endophyte's presence in the host's apical meristem that will need to be explored.
The tissue organization in the adventitious roots appear normal with a well-defined root cap and root apical meristem in each root.
After anthesis, the ovary presents uniseriate outer epidermis and mesophyll with three tissue regions: 1) An outer parenchymatous region, with thin-walled cells that vary in size and shape, and may present druses; 2) A middle region that originates from the middle meristem and consists of elongated cells that are oriented obliquely or transversely to the longitudinal axis of the ovary; and 3) An inner region that is uniseriate and has short palisade-like cells.
The vitrification (glass formation) procedure for cryopreservation eliminates the need for controlled slow freezing and permits cells and meristems to be cryopreserved by direct transfer into liquid nitrogen (Langis et al.
The tissues of a plant include the epidermis, xylem, phloem, ground tissue, and meristems.
Root and shoot meristems are essentially identical, except that shoot meristems are protected by young leaves being initial at the apex; root meristems are protected by a root cap, a group of cells that arises from the apex and provide a loose covering for it.
To observe new leaf+shoot development in aspen over a 60-day period, the top meristems of both simulated browse treatments and unbrowsed controls were harvested in January 2006, and incubated in a growth chamber that simulated local springtime conditions.