(Botanik, Bitkibilim) Kallus, farklılaşmamış bitki dokusu. Doku kültürlerinde 2,4D gibi kimyasalların indüklemesi ile oluşan, sürgün veya kök yapılarına rejenere olabilecek, farklılaşmamış bitki dokusu. Kallus ayrıca bitki herhangi bir sebeple yaralandığında, yaralanan bölgenin üzerini kapatır
A callus (or callous) is an especially toughened area of skin which has become relatively thick and hard as a response to repeated contact or pressure. In botany, the term is also used to announce a condition of thickened surfaces of leaves or other plant parts. Since repeated contact is required, calluses are most often found on hands or feet. Calluses are generally not harmful, but may sometimes lead to other problems, such as infection. Shoes that fit tightly can often produce calluses on the feet. String instrument players develop calluses where their fingers make contact with the strings, but these calluses are often desirable as they help alleviate the pain from the tension of the strings and make playing easier. Dancers often develop calluses on the soles of their feet from dancing barefoot, which makes performing turns less difficult. Video game players may develop calluses on their thumbs, especially if using a controller with a non-ergonomic D-pad design. Frequent use of a writing implement may lead to a callus on the middle finger, commonly known as a "writer's bump"
Parenchymatous cell mass that forms over plant wounds and is commonly seen growing as white, undifferentiated cells from cultured plant cells or tissues
Undifferentiated plant cells resulting from cell division of differentiated organs, such as leaves, roots, seeds The undifferentiated callus can be triggered by hormones to develop into a whole plant
A small area of skin, usually on the foot, that has become thick and hard from rubbing or pressure Calluses may lead to other problems such as serious infection Shoes that fit well can keep calluses from forming See also: Foot care
A callus is an unwanted area of thick skin, usually on the palms of your hands or the soles of your feet, which has been caused by something rubbing against it. an area of thick hard skin. In botany, soft tissue that forms over a wounded or cut plant surface, leading to healing. A callus arises from cells of the cambium. When a callus forms, some of its cells may organize into growing points, some of which in turn give rise to roots while others produce stems and leaves. Thus a callus may be capable of regenerating an entire plant
(botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid bony tissue formed during the healing of a fractured bone form a callus or calluses; "His foot callused"
Same as Callosity The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistence, but is ultimately converted into true bone and unites the fragments into a single piece