In vitro propagation of Colubrina glandulosa Perkins: a potential native species for reforestation programs

Ciencia Florestal

article

Odirlei Orlindo Hass¹  Thiago Sanches Ornellas²  Ricardo Bittencourt¹ 

[1] Universidade Regional de Blumenau;Universidade Federal de Santa Catarina

关键词: Sobraji;    Micropropagation;    Meta-topoline;    PPM™;   

DOI  :  10.5902/1980509853294

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

Colubrina glandulosa (sobraji) is a fast-growing timber species with a straight trunk, with the potential to form homogeneous reforestation, either by itself or associated with other species. In the view of this, we sought to establish a micropropagation protocol, using seeds and nodal segments, aiming at the production of seedlings on a commercial scale. The seeds were disinfected in NaClO 6% for 10, 20 or 30 minutes and sown in MS culture medium supplemented, or not, with 0.5 mL L-1 of Comet®. The nodal segments were disinfected in 2% NaClO and 5% PPM™ solution, introduced in WPM culture medium, supplemented with PPM™ (0; 0.2 or 0.4%) and 0.5 mL L-1 of Comet® associated with 0.75 g L-1 of sodium ampicillin or 2 mL L-1 Kasumin®. In multiplication, nodal segments were grown in WPM culture medium supplemented with BAP (6-benzylaminopurine) or mT (meta-topoline) (2; 4; 8 or 12 µM), combined with the presence or absence of ANA (naphthalenoacetic acid) (2 µM) in three subcultures. For rooting, the WPM/2 culture medium supplemented with IBA (indolbutyric acid) (0, 2 or 4 µM) was used, associated or not with 0.15% activated carbon. The rooted seedlings were acclimatized ex vitro. The highest percentage of germination (78.57%) was observed in seeds treated with 6% NaClO for 10 minutes, without fungicide in the culture medium. The 0.2% concentration of PPM™ provided the highest percentage of nodal segment survival (70%). The succession of subcultures significantly increases the rate of shoot induction and the highest number of shoots per explant (3.28 ± 1.8) occurred at a concentration of 2 µM mT. The formation of the largest number of roots was observed in the absence of activated carbon without the need for exogenous auxin and in acclimatization, there was a high percentage of seedling survival. In this way, it was possible to obtain a viable micropropagation protocol, constituting a promising methodology in the production of seedlings.

【 授权许可】

CC BY-NC