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Fasciation (pronounced / ˌ f æ ʃ i ˈ eɪ ʃ ə n /, from the Latin root meaning "band" or "stripe"), also known as cresting, is a relatively rare condition of abnormal growth in vascular plants in which the apical meristem (growing tip), which normally is concentrated around a single point and produces approximately cylindrical tissue ...
Plant galls are abnormal outgrowths [1] of plant tissues, similar to benign tumors or warts in animals. They can be caused by various parasites, from viruses, fungi and bacteria, to other plants, insects and mites. Plant galls are often highly organized structures so that the cause of the gall can often be determined without the actual agent ...
Edema causes the appearance of growths, mainly on the underside of leaves, and can also cause indentations on the top side of leaves. [4] The growths can take a different appearance depending on the plant species, but can often take the form of needle like hairs, blisters, [3] corky growths and white crusty eruptions. [4]
Attacks by fungi, bacteria, and nematodes can cause rapid killing of plants, large tree branches or even entire trees. A pine tree with pine wilt Wilt diseases in woody plants tend to fall into two major categories, those that start with the branches and those that start with the roots.
Phyllody on a purple coneflower (Echinacea purpurea). Phyllody is the abnormal development of floral parts into leafy structures. It is generally caused by phytoplasma or virus infections, [1] though it may also be because of environmental factors that result in an imbalance in plant hormones. [2]
Physiological plant disorders are caused by non-pathological conditions such as poor light, adverse weather, water-logging, phytotoxic compounds or a lack of nutrients, and affect the functioning of the plant system. Physiological disorders are distinguished from plant diseases caused by pathogens, such as a virus or fungus. [1]
In medicine, a vegetation is an abnormal growth [1] named for its similarity to natural vegetation. Vegetations are often associated with endocarditis . [ 2 ] [ 3 ] [ 4 ] They can be made of fibrin [ 5 ] and platelets .
Generally, the new growth and rapidly growing tissues of the plant are affected first. The mature leaves are rarely if ever affected because calcium accumulates to high concentrations in older leaves. [5] Calcium deficiencies in plants are associated with reduced height, fewer nodes, and less leaf area. [6]
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