Mandela, the former president of the Republic of South Africa and Nobel Peace laureate, spent more than 40 yearsâ27 of them in prisonâas a central figure in the struggle against South Africaâs brutal and restrictive racial regime called apartheid.
meristem culture. (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.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.
1 APICAL meristems (located at the tips of roots and shoots) give rise to three PRIMARY MERISTEMS (protoderm, ground meristem, and procambium). 2  LATERAL MERSTEMS are cylindrical, secondary meristems in both stem and root that give rise to either vascular tissue or secondary dermal tissues.3  They are the. APICAL meristems (located at the tips of roots and shoots) give rise to three PRIMARY MERISTEMS (protoderm, ground meristem, and procambium). 2  LATERAL MERSTEMS are cylindrical, secondary meristems in both stem and root that give rise to either vascular tissue or secondary dermal tissues. 3  They are the.