Logo

Home | Sitemap | Contact us | Search | Language
Left Right
 
  Home >>Botany Dictionary>>Cyanophycin - Cytotaxonomy

Cyanophycin - Used for food reserve characteristic of algae that belong to Cyanophyta.

Cyathiun - A specialied cup-shaped inflorescence of members of Euphorbiaceae which resembles a single flower and consists of a simple female flower in the centre surrounded by a number of naked male flowers and all these are enclosed involucre of bracts. Involucre also bears a number of glands along its rim.

Cyclosis (cytoplasmic streaming). The movement of cytoplasm which is taking place within the cell due to cytoplasmic viscosity as a result of change in nature of protein, specially the actin.

Cyme - An infloresence in which the terminal bud is a flowerbud, i.e., it is a sympodium, and any subsequent flowers are formed in a similar way at the ends of lateral branches.

Cypsella - Used for the type of fruit that is dry and indehiscent.1t develops from bicarpellary, syncarpous, inferior ovary and is unilocular with pericarp separate from the seed coat.

Cyst - Any thick-walled resting spore.

Cytokinesis - Refers to the process of cytoplasmic division which follows karyokinesis. As telophase continues, a cell plate is formed in the cytoplasm in the equatorial region of spindle and thus cell gets divided into two daughter cell, each having a daughter nucleus.

Cystolith - A large intracellular structure which is formed by deposition of lime on an ingrowth of cell wall e.g., in plant of Ficus elastica and Urtica dioica.

Cytochrome - Any iron-porphyrin having electron carrying pro­teinaceous pigment that forms part of electron transport chains of respiration or photosynthesis. Porphyrin prosthetic group has a chelated iron ion which changes from ferric to ferrous during reduction and vice-versa during oxidation.

Cytogenetics - Refers to the application of cytological techniques to the problems of inheritance particu1ary the study of chro­mosome structure and its relation to phenotype.

Cystocaq - A swol1en, urn-shaped fruiting body which occurs in some red algae e.g. polysiphonia. It is formed after fertili­ation of carpogonium.

Cytokinin (kinin). Used for any of a group of growth substances which primarily stimulate cell division. The effect occurs only in association with auxin. Different proportions of auxin and cytokinin may induce different types of meristematic activity.

Cytology
(cell biology). The branch of biology dealing with the structure, organisation and functioning of cell and its mate­rial.

Cytomixis - Used for describing apparent migration of cytoplasm and nuclear material from one pollen mother cell to another through pores (cytoplasmic channels) in the cell walls. It takes place prior to and during the prophase stage of meiosis.

Cytopharynx - Describing a narrow passage which is arising from the base and upto the surface in the gullet of euglenoid cells.

Cytoplasm
(hyaloplasm). Used for the part of protoplasm exclud­ing nucleus, soluble phase, but having principle components of cell including cisternal elements and membrane-bound organelles, biochemical pathways, storage products in its matrix.

Cytotaxonomy - Describing the number, structure and behaviour Of chromosomes in taxonomic work. Chromosome number of karyotype forms t1)e most specific taxonomic character.

Cytoplasmic Inheritance -(extra chromosomalinheritance). Used for the determination and inheritance of a characteristic by gennes present in the cytoplasm (plasma genes). Expression I of such characters does not relate to behaviour or movement of chromosomes and so their inheritance does not follow Mendelian laws.

Left Right