achene


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

achene

(əkēn`), dry, simple, one-seeded fruit with the seed attached to the inner wall at only one point. Achenes are indehiscent, i.e., they do not split open at maturity. The so-called seed of a sunflower is an achene; the shell is the wall of the fruit, and the true seed lies within. A strawberry consists of many achenes embedded in a fleshy receptacle.

Achene

 

a monospermous indehiscent fruit of angiospermous plants. An achene consists of two carpels with an inferior ovary; it has a dry, leathery pericarp (in Compositae and Dipsacaceae). Winglike processes, pappi, hooklets, and other formations often develop to promote distribution of the fruit. The achene of Dipsacaceae falls off with a sheath of concresced bracts; in some Compositae (cocklebur, globe thistle) the achene falls off with the sheath of the head.

achene

[ə′kēn]
(botany)
A small, dry, indehiscent fruit formed from a simple ovary bearing a single seed.
References in periodicals archive ?
Decrease in head diameter, thousand achene weight and number of achenes with increasing plant population was also recorded by Al-thabet (2006).
The following observations were noted; Number of days taken to emergence, number of days taken to flower completion, number of days taken to maturity, number of plants m-2, Plant height at maturity, head diameter, number of achene's per head, 1000-Achene weight and achene's yield.
Although, this winged structure aids in dispersal to some degree, we believe a primary function is to prevent the achene from becoming buried too deeply in the sandy soil.
As a precaution to prevent mold, achenes were surface sterilized with a 5% v:v sodium hypochlorite (household bleach) solution in distilled water for 5 min with agitation.
To characterize population differentiation in achene and head traits morphologically, a correlation analysis and a principal component analysis were performed on the population means of the traits defined in the previous paragraph.
The weather (mainly the temperature and precipitation during the achene filling period) affected the linoleic acid content of hybrids.
The only taxa where the developed prophyll accompanies the achene are Lipocarpha.
The fruit is a narrow five-lobed achene [1 .The general practice of multiplication for most of the perennial ornamental plants is by the use of vegetative plant parts including stem, leaves, terminal buds and roots due to its simplicity and practicability in developing countries [3].
The obtained results revealed that there was a significant difference for days taken to flowering (DF), achene's formation (DAF) and physiological maturity (DPM) and yield in both of the hybrids except, number of days to germination (DG.).
In addition to the small and rarely seen flowers, an unusual structure of the achene provides an important taxonomic characteristic.