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Meristem in Biological News

Hormone clue to root growth

...istem, the zone of cell proliferation. Plants in which the cells in the meristem were made to express a mutant version of the growth-repressing protein GAI ... innermost layer of the root cortex of a plant), was sufficient to stop the meristem enlarging. In effect, the rate of expansion of dividing endodermal cells di...

UCR scientists identify stem-cell genes that help form plant organs

... RIVERSIDE, Calif. Plant stem-cells are master cells located at the tip of the stem and are part of a structure called the shoot apical meristem (SAM). Here, the stem cellsall clumped togetherdivide throughout the life of the plant to give rise to other cells, resulting in the formation of abov...

The bonsai effect: Wounded plants make jasmonates, inhibiting cell division, stunting growth

...ves of the model plant Arabidopsis are wounded, cell division in the apical meristem is reduced, growth of the plant is arrested within days, and the new leaves...naffected. Unexpectedly, the suppression of cell division in the apical meristem occurs through a signal pathway initiated by the wound hormone, jasmonate, ...

Researchers find an essential gene for forming ears of corn

...ulate auxin transport, we found, interestingly, that the transport of auxin and biosynthesis work together in a synergistic manner to regulate how the meristem and lateral organs of the maize plant develop." ...

Genetic snooze button governs timing of spring flowers

... to the cold triggers a process in plants known as vernalization, where the meristem - a region on the growing point of a plant where rapidly dividing cells dif... because they possess a gene that blocks flowering," Amasino explains. "The meristem is where the repressor (gene) is expressed and is where it is shut off." ...

The evolution of food plants: Genetic control of grass flower architecture

...; the tassel (male pollen-bearing flowers) and the ear (female flowers and site of seed or kernel development). The tassel forms from the shoot apical meristem after the production of a defined number of leaves, whereas ears form at the tips of compact axillary branches. Normal maize ears are unbranched, and ...

Max Planck researchers make a breakthrough in plant stem cell research

... University of Tübingen, Germany about a decade ago. Here it was shown that a gene called WUSCHEL has a key influence on how many cells in the apical meristem actually stay stem cells. However, until now, it was unclear how hormones and regulatory genes, such as WUSCHEL work together to maintain this fine ba...
Meristem in Biological Definition

Phloem

...ssenger RNAs are transported in the phloem through sieve tube elements . Phloem is produced in phases. Primary phloem is laid down by the apical meristem . Secondary phloem is laid down by the vascular cambium to the inside of the established layer(s) of phloem. ...

Xylem

...ects and xylem cells. In perennial plants , xylem is laid down in multiple phases. Primary xylem is one of the tissues left behind by the apical meristem . Secondary xylem is laid down by vascular cambium on the outside of the xylem column. Contents The xylem sap consists mainly of water and ...
Meristem in Biological Dictionary

Meristem

A meristem is the tissue in all plants consisting of undifferentiated cells and found in zones of the plant where growth can take place. Stockbrokers, issuing house and providers of other capital market services. ... QUICK FINDER ... DANGOTE SUGAR REFINERY PLC: Q109 RESULTS: OUR INITI...

Lateral meristem

(Redirected from Lateral meristem ) Jump to: navigation, search ... These secondary meristems are also known as lateral meristems because they are ... Aspects of the topic lateral - meristem are discussed in the following places at Britannica. Assorted References angiosperms ( i...

Apical meristem

A meristem is the tissue in all plants consisting of undifferentiated cells and found in zones of the plant where growth can take place. Aspects of the topic apical - meristem are discussed in the following places at Britannica. root anatomy ( in root (plant) ) Roots grow in length o...

Xylem

... of transport tissue in plants, ... in secondary xylem , laid down by a meristem called the vascular cambium ... Best Value on Xylem Vanities. Find ...p the xylem towards the leaves. ... in secondary xylem , laid down by a meristem called the vascular cambium ... Xylem summary with 7 pages of encyc...

Vascular cambium

... The 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 ...

Stomata

...ough which gases and water vapor pass ... or process of transpiring, especially through the stomata of plant tissue or the pores of the ... · meristem · Root · Stem · Stoma · Vascular tissue · Wood. Plant ... Dicotyledons usually have more stomata on the lower epidermis than the upper epid...

Secondary xylem

...lants, ... in secondary xylem , laid down by a meristem called the vascular cambium in woody ... se...em ... in secondary xylem , laid down by a meristem called the vascular cambium. ... Secondary xyl...other. ... in secondary xylem , laid down by a meristem called the ... Encyclopedia article about Sec...

Secondary growth

...th is the result of the activity of the vascular cambium. The latter is a meristem that divides to produce secondary xylem cells on the inside of the meristem and secondary phloem cells on the outside . This growth increases th...

Root cap

...- Wikipedia, the free encyclopedia. The root cap is a section of tissue at the tip ... The root cap cells are derived from the rootcap meristem that pushes cells ... Root cap cells differentiate first into columella cells. ... The root cap also plays a role in a plant's respo...

Primordium

...rudimentary form or stage of development ... Explain establishment of primordium ? ... leaf primordium n. A lateral outgrowth from the apical meristem that develops into a leaf. ... Explain establishment of primordium ? ... MySpace Music profile for Primordium . Download Primordium Grindcore ...
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