Micropropagation of Arrowroot (Maranta arundinacea) | | Author : Guilherme Augusto Arantes Sousa, Josimara Nolasco Rondon, Marney Pascoli Cereda, Francilina Araujo Costa, Victória Maria Ingre Targa, Denilson de Oliveira Guilherme | | Abstract | Full Text | Abstract :The study aimed at establishing a protocol to produce arrowroot plants quickly. Seedlings were grown from stem nodes on
modified MS medium in controlled growth chamber, green house and filed and again aclimatized in green house on washed sands and soil. Chlorophyll content both of a and b in seedlings were higher in the plants grown in field (32.97 and 9.80 respectively) and likewise greenhouse grown seedlings had greater contents than in plants grown in vitro (16.66 and 3.76
respectively). Plants acclimatized in green house soil for 120 days achieved an average rhizome height up to 32.7 cm along
with having higher number of leaves (7.0) and dry weight (100 g) compared to those acclimatized in washed sands (15.00
cm, 7.0 and 50 g respectively). So, the results showed that is possible to obtain rhizomes of arrowroot in less time. |
| Occurrence of noni anthracnose caused by Colletotrichum siamense in Amazonas, Brazil | | Author : Blenda Naara Santos da Silva, Ana Francisca Tibúrcia Amorim Ferreira e Ferreira, Adolfo José da Mota, Jânia Lília da Silva Bentes | | Abstract | Full Text | Abstract :Noni (Morinda citrifolia L.) is native from Southeast Asia and was introduced in Brazil recently, where it has well adapted to the edaphoclimatic conditions. The fruits are consumed because of their numerous therapeutic properties. From March to November 2018, circular brown spots with concentric rings were observed on leaves of noni plants, at Federal University of Amazonas campus (UFAM), where the temperature and rainfall ranged from 23°C and 32°C, and 47 mm and 335 mm in this period. |
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