Meristem culture may be used to propagate infertile plants, nursery stock, or F1 hybrids that do not breed true. As few virus diseases affect the plant apex, the technique can be used to produce virus-free stock.shoot-tip culture) The culture of excised meristems on suitable nutrient media under aseptic conditions. The stem apex is usually used though axillary meristems may also be taken. Often gibberellic acid must be added to the medium to promote normal growth into a plantlet.
The typical constellation of symptoms associated with disseminated Lyme disease may include severe fatigue with a need for naps during the day, low grade fevers, muscle and joint pains, sleep disturbance, irritability, headaches, light or sound sensitivity, sharp stabbing or shooting pains, and/or numbness and tingling.
New research points to reinfection, not relapse. Difficult to diagnose, Lyme disease is transmitted when an infected tick bites a human. Immediate symptoms include a telltale bull's eye rash (also known as erythema migrans), fever, headache, muscle and joint aches, stiff neck and fatigue. In the days and weeks following an untreated tick bite, infection can spread from the site of the bite to additional parts of the body.