(n.) A tissue of growing cells, or cells capable of further division.
Example Sentences:
(1) In apical meristem, on the other hand, the level of d-3-phosphoglycerate dehydrogenase exceeded that of d-glycerate dehydrogenase at all time periods studied.
(2) Treatments with tritiated thymidine (TdR-(3)H) have revealed the existence of two populations of mitotically active cells in meristems of lateral roots of Vicia faba.
(3) All of the transcripts were highly expressed in the protoderm of the shoot apical meristem.
(4) The third mRNA is abundant in seedling axes and accumulates specifically in the ground meristem and mature cortex of hypocotyls and roots.
(5) The rate of RNA and protein synthesis in resting and growing meristem tissues from isolated tuber growth points under their incubation with labelled precursors is studied.
(6) Treatment of Vicia faba main root meristems with methyl iodide (MeI) 2 h before challenge treatment with triethylene melamine (TEM) significantly reduced the yield of metaphases with chromatid aberrations, i.e., resulted in clastogenic adaptation.
(7) About 60 affected phragmoplast function in root meristems.
(8) We have developed a procedure for a high-yield isolation of protoplasts allowing an accurate flow-cytometric analysis with a few micrograms of meristem tissues.
(9) The study was carried out on nuclei isolated from the root meristem of Pinus silvestris.
(10) The rapidity and reversibility of such responses, and their apparent independence of changes in carbon supply or meristem cell turgor are held to support the hypothesis that chilling alters the physical properties of the walls of extending cells within the meristematic zone.
(11) The transcription of the pea ENOD2 gene starts when the inner cortical cells develop from the nodule meristem.
(12) Arabidopsis flowers develop from groups of undifferentiated cells on the flank of an inflorescence meristem.
(13) Chromosomal DNA fiber replication was investigated in the shoot meristem of mustard plants during the morphogenetic transition from the leaf-forming (vegetative) to the flower-forming (evoked) condition.
(14) That is, although NodH mutants lose the ability to elicit root hair curling (Hac-), infection threads (Inf-), and nodule meristem formation (Nod-) on the homologous host alfalfa, they gain the ability to be Hac+ Inf+ Nod+ on a nonhomologous host such as common vetch.
(15) The kinetics of nodule formation by these mutant strains, by an exoB mutant, and by mixed mutant inocula suggest that the gene products required for nodule invasion may also influence nodule meristem induction.
(16) Analysis of genetic mosaics and direct observation with the SEM have broken leaf development into three distinct phases: recruitment of cells within the meristem, cell division into the 0.6-mm tall primordium, and postprimordial division and differentiation into the mature leaf.
(17) Stage 1 begins with the initiation of a floral buttress on the flank of the apical meristem.
(18) In the present paper, this caffeine effect has been analyzed in Allium cepa root meristems growing at different culture temperatures under steady-state kinetics.
(19) In order to determine the best conditions to carry out quantitative ultrastructural studies in plant specimens, five different fixation techniques, including some of the most reported electron microscopy fixatives (glutaraldehyde-paraformaldehyde, osmium tetroxide, potassium permanganate), were assayed in onion root meristems to check their ability to induce morphometric changes in Golgi apparatus ultrastructure.
(20) Changes in the internal structure of the mitochondria having the developed system of crystae in the actively growing apices and those with weakly developed crystae in the resting seed or low active "waiting meristem" are much more pronounced.
Procambium
Definition:
(n.) The young tissue of a fibrovascular bundle before its component cells have begun to be differentiated.
Example Sentences:
(1) Light and electron microscopical studies showed that, during preculture, procambium cells of embryos became highly susceptible to Agrobacterium infection.
(2) Lateral and intermediate veins are initiated in this central layer, most often by divisions which contribute daughter cells to both the procambium and the ground meristem.