primordium

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primordium

[prī′mȯrd·ē·əm]

(embryology)

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Caption: Figure 1--Phalaenopsis Classic Spotted Pink hybrid development stages (at 120 DASI), in somatic embryos until complete plant: (A) Protocorm showing the formation of morphogenic structures at the explant base, 15 days after SE-induction; (B) Protocorm showing leaf primordia etiolation (#) and morphogenic structure formation at the base (arrow) (20x); (C) Protocorm showing embryos in different stages at the 30th culture day: globular (*), Torpedo (#) and protocormoids ([section]); (D and E) Chlorophyllated protocormoids from somatic embryos; (F) Complete plants derived from somatic embryos generated from protocorms.

Somatic embryos from Phalaenopsis classic Spotted Pink (Orchidaceae) protocorms/Embrioes somaticos provenientes de protocormos de Phalaenopsis classic Spotted Pink (Orquidaceae)

The ancestral state of the family, is reconstructed as having a hemispherically shaped scutellum and undifferentiated leaf primordia, similar to those found in Juncaceae and some Mapanioideae.

Phylogeny and Systematics of Cyperaceae, the Evolution and Importance of Embryo Morphology

The premuscular primordia appear more positive than the undifferentiated mesenchyme.

Expression of Wnt and [beta]-Catenin in Mouse Tooth Germs and Chick Facial Primordia: A Comparison/ Expresion de Wnt y [beta]-Catenina en Germenes de Dientes de Raton y Primordios Faciales de Polluelos: Una Comparacion

The stomodeum is also clearly visible, and there is an initial differentiation of the mandibules, maxillules, maxillae, and maxilliped primordia. The telson reaches the level of the maxillae (Fig.

Embryonic Development in the Peppermint Shrimp, Lysmata boggessi (Caridea: Lysmatidae)

Snow, "The dorsiventrality of leaf primordia," New Phytologist, vol.

The YABBY Genes of Leaf and Leaf-Like Organ Polarity in Leafless Plant Monotropa hypopitys

It has been reported that Pax-2 is one of the earliest markers of the developing inner ear, which was expressed in the auditory and vestibular sensory primordia [26, 27] and related to the highly proliferative potential of progenitor cells in developing sensory patches of chicken [28].

The Key Transcription Factor Expression in the Developing Vestibular and Auditory Sensory Organs: A Comprehensive Comparison of Spatial and Temporal Patterns

Among all these tested combinations, shoot primordia appeared on the calli on SIM1and SIM2 media only after 28 days of sub-culturing(Fig.

THE EFFECT OF EXPLANT SOURCES AND GROWTH REGULATORS ON CALLUS INDUCTION AND REGENERATION IN DIFFERENT TOMATO CULTIVARS

tuoliensis is the earliest variety from Xinjiang in China; it needs low temperatures for bud stage and temperature <4degC for the differentiation of mushroom primordia, which are the bottleneck of P.

DNA Methylation Changes in Pleurotus eryngii Subsp. tuoliensis (Bailinggu) in Response to Low Temperature Stress

The emergence of root primordia in air layers, occurred with a continuous vertical linear pattern above the cut area, extending towards the distal region of the branch, which may indicate an origin from ray cells.

Sexual and vegetative propagation of the medicinal Mexican species Phyllonoma laticuspis (Phyllonomaceae)

In wandering third stadium larvae, pb-GAL4 is expressed in a small ring of cells in the aristal primordia, which was observed in the early prepupae (Figure 2(F)).

The Noncell Autonomous Requirement of Proboscipedia for Growth and Differentiation of the Distal Maxillary Palp during Metamorphosis of Drosophila melanogaster

On shoot apex longitudinal section was possible to observe standard type colleters between leaf primordia and stipule, emerge on secretion (fig.

ENVIRONMENTAL SCANNING ELECTRON MICROSCOPY (ESEM) OF Morinda citrifolia L. (Rubiaceae) COLLETERS

Further, during flowering the formation of pistillate organs may be favoured by high auxin level in the vicinity of differentiating primordia.

Effects of plant growth regulators on flowering, fruiting and fruit yield in bitter gourd (Momordica charantia L.)