Background: Rosa centifoliais commercially propagated by asexual means but in vitro propagation ensure the production of disease free and healthy plants and browning of explants creates hurdle in their multiplication. Objectives: The aim was to reduce oxidative browning of shoots of R. centifolia in MS medium during in vitro propagation. Materials and Methods: Axillary buds of R. centifolia we...

Baccharis dracunculifolia DC. is a pioneer plant native from Brazil that has great importance due to its secondary metabolites (essential oil and Brazilian green propolis) potential in the recovery of degraded areas. The main goal this study was evaluate propagation techniques B. by sexual reproduction asexual male female stem cuttings. For reproduction, individuals natural population were peri...

The relative contributions of sexual and asexual reproduction to the genetic structure of populations can be difficult to determine for fungi that use a mixture of both types of propagation. Nuclear RFLPs and DNA fingerprints were used to make indirect and direct measures of departures from random mating in a population of the plant pathogenic fungus Mycosphaerella graminicola during the course...

the resistance of plasmodium falciparum to 4-amioquinolines has been confirmed in parts of south america such as venezuela, colombia, brazil and panama since 1961. during 1968-1970, 147 p. falciparum cases in the kazeroon and bandar abbas areas were tested against 4-aminoquinolines, bases on 25 mg resochin /kg of body weight over a period of 3 days. twenty–foure, 48 , 72 and 96 hours after drug...

Although regeneration studies are useful for understanding how organs renew, little information is available about regeneration of reproductive organs and germ cells. We here describe the behavior of germ-cell precursors during regeneration of the oligochaete annelid worm Enchytraeus japonensis, which has the remarkable feature of undergoing asexual (by fission) and sexual reproduction . We fir...

A Keiki is the product of asexual propagation which naturally develop at node a flower stalk or cane. Phalaenopsis produce along middle to end nodes on stalk. Although keikis are an inefficient way propagate orchids commercial scale, it interesting study cytokinin hormone Benzyl Aminopurine (BAP) effect stimulate Two each were used in this experiment. Cytokinin (0 mg L −1 , 2 000 4 6 BAP) was o...

Abstract The red algal genus Asparagopsis produces secondary metabolites that when fed to ruminants reduce methane production by up 98%. However, cultivation methods for are nascent and fundamental information on reproduction, which is essential large-scale cultivation, lacking. In this study we examined asexual propagation in armata , the regrowth of fragments mechanisms attachment assess pote...