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Resistance to the cotton blight bacteria is one of the primary objectives for cotton plant breeders. Although cotton plant resistance may be to a particular Xcm race, it reveals how the physiological characteristics of plants can effectively aid in plant resistance to diseases and pest attacks.
1 Bacterial. 2 Fungal. 3 Parastic. 4 Viral. 5 Phytoplasmal. 6 References. Toggle the table of contents. ... This article is a list of diseases of cotton (Gossypium ...
When either these bacterial genes or a plant's resistance genes to the pathogen are not present, the interaction will result in disease. Alternatively, when the genes are present, the plant's resistance genes will produce a product that is able to recognize the avr genes of the bacteria, which allows for the plant host to have resistance. [3 ...
As the pathogen proceeds from the leaf margins towards the veins, water stress and chlorotic symptoms develop due to occlusion of water-conducting vessels by bacterial exopolysaccharides and components of degraded plant cell walls. [1] [6] The darkening of vascular tissues following bacterial invasion gives the black rot disease its name. [2]
Blight is a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organs. [1] Accordingly, many diseases that primarily exhibit this symptom are called blights. Several notable examples are: [citation needed]
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A leaf spot is a limited, discoloured, diseased area of a leaf that is caused by fungal, bacterial or viral plant diseases, or by injuries from nematodes, insects, environmental factors, toxicity or herbicides. These discoloured spots or lesions often have a centre of necrosis (cell death). [1]
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