Difference between chlorosis and necrosis
Answers
Explanation:
1) chlorosis :_Chlorosis refers to the yellowing of plant parts, mainly leaves and veins. Yellow spots appear on the leaves, giving a mosaic pattern. 2)Yellowing occurs due to insufficient amounts of chlorophylls. 3)Chlorophyll production can be decreased due to many reasons.4) One of the major reasons is nutrient deficiency. 5)Iron is one of the key elements in chlorophyll. Thus, iron deficiency is a major cause of chlorosis. Furthermore, chlorosis can also occur as a result of disease, herbicide injury, poor water drainage, damaged roots, high alkalinity, compacted soil, etc. However,6) the reasons for chlorosis may vary from plant species to species. For example, some plants grow well in alkaline soils, but they also may show chlorosis due to some other reason
Necrosis:_In plants, necrosis refers to the death of plant cells or tissues. Necrosis occurs due to injuries or diseases. Furthermore, necrosis takes place as a result of nutrient deficiency. Necrotic areas appear as brown spots. Necrosis can occur on leaves, stems, roots, leaf margins, veins, etc. Unlike chlorosis, necrosis is irreversible
Viral infections often lead to necrosis in plants since viruses use plant cells to replicate, and they often come out by lysing the host cell. Tobacco necrosis virus affects tobacco plants causing necrosis. Similarly, Soybean vein necrosis virus affects the vascular system, while cymbidium mosaic virus affects orchid flowers. Bacteria and fungi also cause necrosis in plants. Some bacteria degrade cell walls of plant cells, leading to cell death and necrosis. Some fungi attack the vascular system of plants and cause different diseases like anthracnose that lead to necrosis in plants.