"Protostele" Pronounce,Meaning And Examples

"Protostele" Natural Recordings by Native Speakers

Protostele

"Protostele" Meaning

A rare or obsolete word!

A protostele is a type of plant stem in which all the vascular tissue is arranged in a central pit or tube.

"Protostele" Examples

English sentence usage examples for "Protostele"

In botany, a protostele is the type of hypocotyl found in plants:
In seed plants the hypocotyl contains a protostele, which in turn contains a pith and is usually of the solid type.
A protostele in botany is a rare plant body arrangement: The bulk of a protostele arises from the heart or central tissue of an eustele.
The protostele in botany is a central or solid type of stelar organisation: Other types of stelar situation include those having a protostele, in which the shoot initial instead of giving off two lateral initials gives off many radial strips of peripherally meristematic tissue in which there is a series of very small, thick-walled cells of xylem.
Eustele: Stem or stem-like part with a protostele, an axial root and leaves borne at some distance from the node: Stems, stems, leaves, axils, node, nodes, apical meristem, pith.
They have an epistele (a leaf-bearing lamina surrounding the protostele): The few lymphatic families encountered in N.C. usually come perfectly intact to us; they are therefore not worth a description.

"Protostele" Similar Words

Protopoditic

Protopoditic refers to something that resembles or pertains to a prototype, which is a preliminary or early form or example of something, often serving as a basis or model for further development or refinement. In other words, protopoditic means related to or characterized by being an early or initial version of something, often experimental or exploratory in nature.

Protoporphrin

Protoporphyrin is a type of porphyrin compound that is a precursor to the production of heme, a vital component of hemoglobin in red blood cells and other hemoproteins. It is a greenish-colored compound that is produced during the breakdown of heme through a process called heme catabolism. There are several forms of protoporphyrin, including: Protoporphyrin IX: This is the most common form of protoporphyrin, which is a pentacarboxylic acid ring compound containing four pyrrole subunits. Protoporphyrin (dinitro.INTCO): This form of protoporphyrin is a reduced form of protoporphyrin IX, in which the four carboxylic acid groups have been replaced by nitro groups. Reduced protoporphyrin: This form of protoporphyrin is a further reduced form of protoporphyrin IX, in which the double bonds between the pyrrole subunits have been reduced. Protoporphyrin is an important intermediate in the biosynthesis of heme, and disruptions in the enzymes involved in heme biosynthesis can lead to conditions such as porphyria, a group of rare genetic disorders characterized by abnormal accumulation of porphyrins in the body. In addition to its role in heme synthesis, protoporphyrin has been studied for its potential biological effects, including its ability to interact with DNA and RNA, and its role in the regulation of cellular signaling pathways.

Protoporphyria

Erythropoietic protoporphyria (EPP) is a rare genetic disorder that affects the production of heme, a green pigment in hemoglobin found in red blood cells. It is caused by a mutation in the ALAS2 gene. The condition is characterized by an increase in protoporphyrin levels in the blood, particularly in the erythrocytes. The accumulation of protoporphyrin causes photosensitivity, leading to blistering erythema, pain, and swelling of sun-exposed areas, as well as other symptoms.

Protoporphyrin

Protoporphyrin is a type of porphyrin, a family of organic compounds with a porphyrin macrocycle. Protoporphyrin IX (PPIX), also known as porphyrin IX, is a key intermediate in the biosynthesis of heme, a crucial component of hemoglobin, myoglobin, and other hemoproteins. A porphyrin is a macrocyclic compound comprising four modified pyrrole subunits interconnected at their α carbon atoms via methine bridges (CH-). The four pyrrole groups are arranged to create an equilateral rectangle, with a central coordinated atom (iron in heme, magnesium in chlorophyll), surrounded by four reduced-side pyrrole groups and four axial ligands. Protoporphyrin IX can be obtained from the interaction of four molecules of δ-aminolaevulinic acid (ALA) via the porphyrin pathway. The enzyme ferrochelatase binds iron to the porphyrin IX ring in a reaction called ferrochelatase or ferrocheletation, producing heme. Porphyrins, including protoporphyrin IX, are fluorescent compounds with a characteristic intense red fluorescence under ultraviolet light. This property has been utilized for biological and photodynamic applications, such as photosensitizing light-sensitive reactions in reactive oxygen species in medical treatments like photodynamic therapy for cancer. Abnormal levels of protoporphyrin IX have been linked with various diseases related to the biosynthesis pathways of heme, such as porphyrias and some forms of anemia.

Protopterus

Protopterus is an ancient genus of lungfish from the order Neoceratodontiformes. It is one of the five living genera of lungfish, which are places on the main branch of the Chordata with other tetrapods (four-legged vertebrates).

Protoscolices

Protosilicate

A mineralogical term! A protosilicate is a type of silicate mineral that contains a relatively small amount of silicon (Si) and oxygen (O) but lacks a full complement of oxygen atoms compared to silicates.

Protosomite

A protosomite is a hypothetical precursor to a somite, a group of mesodermal cells in embryonic development that gives rise to various body structures such as the musculature, vertebrae, and dermis of the skin. A protosomite would be an early, less complex structure that eventually develops into a somite.

Protostelic

Protostoma

Protostome

Protostomes

Protostomes are a superphylum of bilaterally symmetrical animals, characterized by a developing embryo in which the mouth forms before the anus. This group includes: Mollusks (squid, octopuses, clams, snails, slugs) Annelids (segmented worms, such as earthworms and leeches) Echinoderms (starfish, sea urchins, sea cucumbers) Nematodes (roundworms) Various arthropod groups, including insects, arachnids, and crustaceans. The protostomes developed from a common ancestor that lived over 600 million years ago, and this group is the largest and most diverse group of animals on the planet.

Protostomia

Metazoa are divided into two subgroups: protostomia and deuterostomia. Protostomia are those animals in whose embryos the blastopore develops into a mouth.

Protosuchia

Protosuchia is an extinct order of early long-snouted or crocodile-like archosaurs that lived during the Triassic period, around 245-201 million years ago. They were one of the first groups of crocodile-like animals to evolve and were likely fish-eating, semi-aquatic predators. The name Proto Suchia means "样子 first crocodiles" or "proto-crocodiles" in Greek and Latin.

Protosuchians

The term "Protosuchians" refers to a group of archaic crocodile-like extinct reptiles that lived during the Early Cretaceous period, from around 145 to 100 million years ago. They were among the first cousins of modern crocodilians.