There are two types of apical meristem tissue: shoot apical meristem (SAM), which gives rise to organs like the leaves and flowers, and root apical meristem (RAM), which provides the meristematic cells for future root growth. (wikipedia.org)
Cells at the shoot apical meristem summit serve as stem cells to the surrounding peripheral region, where they proliferate rapidly and are incorporated into differentiating leaf or flower primordia. (wikipedia.org)
The shoot apical meristem consists of four distinct cell groups: Stem cells The immediate daughter cells of the stem cells A subjacent organizing center Founder cells for organ initiation in surrounding regions These four distinct zones are maintained by a complex signalling pathway. (wikipedia.org)
In Arabidopsis thaliana, 3 interacting CLAVATA genes are required to regulate the size of the stem cell reservoir in the shoot apical meristem by controlling the rate of cell division. (wikipedia.org)
The main growing point (apical meristem) of the shoot is in a vegetative stage, producing new leaves. (johnsonsofpikeville.com)
The apical meristem is the plant tissue which drives above ground growth, and decides the direction of the plant. (unitedcapitalnashville.com)
New leaves and branches of Equisetum are produced by the apical meristem, however, most of the length of the stem are due to the activity of intercalary meristem located just above each node. (biologydiscussion.com)
Leaves are lateral determinate structures formed in a predictable sequence (phyllotaxy) on the flanks of an indeterminate shoot apical meristem. (cfsscloud.hk)
Indeterminate1
Apical meristems are the completely undifferentiated (indeterminate) meristems in a plant. (wikipedia.org)
citation needed] There are three types of meristematic tissues: apical (at the tips), intercalary or basal (in the middle), and lateral (at the sides). (wikipedia.org)
These secondary meristems are also known as lateral meristems because they are involved in lateral growth. (wikipedia.org)
Species2
One of these indications might be the loss of apical dominance and the release of otherwise dormant cells to develop as auxiliary shoot meristems, in some species in axils of primordia as close as two or three away from the apical dome. (wikipedia.org)
There has been recent interest in extending leaf evolutionary developmental studies to other species and lineages, particularly in lycophytes and ferns. (cfsscloud.hk)
Stem4
Cells of this zone have a stem cell function and are essential for meristem maintenance. (wikipedia.org)
Apical meristems are found in two locations: the root and the stem. (wikipedia.org)
The sporophytic plant body of Equisetum is differentiated into stem, roots and leaves (Fig. 7.83). (biologydiscussion.com)
The ridges of the successive internodes alternate with each other and the leaves are normally of the same number as the ridges on the stem. (biologydiscussion.com)
Shoots2
Sometimes shoot shows dimorphism (two types of shoots i.e., vegetative and fertile) e.g. (biologydiscussion.com)
Some shoots are profusely branched, green (chlorophyllous) and purely vegetative. (biologydiscussion.com)
Shoot1
citation needed] Shoot apical meristems are the source of all above-ground organs, such as leaves and flowers. (wikipedia.org)
Plant5
Differentiated plant cells generally cannot divide or produce cells of a different type. (wikipedia.org)
The apical meristems are layered where the number of layers varies according to plant type. (wikipedia.org)
The corpus and tunica play a critical part of the plant physical appearance as all plant cells are formed from the meristems. (wikipedia.org)
The complex tissues of the plant aid in this overall effort to supply the roots with food as they supply the leaves with water and nutrients. (unitedcapitalnashville.com)
These controversies along with the phylogenetic position of ferns as sister to seed plants, and the fact that fern leaves display a great morphological diversity, make ferns a key plant lineage for comparative studies on how leaves and vascular plants evolved. (cfsscloud.hk)
Types1
The primary meristems in turn produce the two secondary meristem types. (wikipedia.org)
Growth1
The proliferation and growth rates at the meristem summit usually differ considerably from those at the periphery. (wikipedia.org)
Cells4
Cells in the meristem can develop into all the other tissues and organs that occur in plants. (wikipedia.org)
At the meristem summit, there is a small group of slowly dividing cells, which is commonly called the central zone. (wikipedia.org)
This vitally important meristematic zone contains cells which account for the central stalk (culm) as well as cells which account for the leaves. (johnsonsofpikeville.com)
Collenchyma develops from the elongated cells which resemble procambium or from isodiametric cells of the ground meristems. (unitedcapitalnashville.com)
Made1
These families have extremely modified leaves, and this has made their interpretation difficult. (cfsscloud.hk)
Origin1
The origin and evolution of leaves in vascular plants has been widely debated. (cfsscloud.hk)
Development4
After a suitable period of development, this growing point is gradually transformed into a floral bud which soon produces a rudimentary seedhead. (johnsonsofpikeville.com)
More recently, molecular genetic studies have provided insight into leaf evolution and development mainly within angiosperms and, to a lesser extent, lycophytes. (cfsscloud.hk)
Therefore, a review of fern leaf morphology, evolution and development is timely. (cfsscloud.hk)
Here we discuss the theories of leaf evolution in ferns, morphology, and diversity of fern leaves, and experimental results of fern leaf development. (cfsscloud.hk)
Capable1
Lenient grazing is advised until such time as haplocorm buds are capable of producing prompt competitive regrowth. (johnsonsofpikeville.com)
Basal3
citation needed] There are three types of meristematic tissues: apical (at the tips), intercalary or basal (in the middle), and lateral (at the sides). (wikipedia.org)
Lower portions of the basal stipe system also produce root-like haptera that grow downwards, wrapping around and forming attachment to irregularities in solid substrata. (fao.org)
The outer blade of the two produced by the splitting becomes an apical frond initial while the inner portion remains as a basal meristem that will give rise to yet further new frond and basal meristem initials. (fao.org)
Distinct1
Further stipe growth and splitting produces an apical scimitar-shaped blade distinct from the remaining blades. (fao.org)