Banca de DEFESA: TAINA LYRA DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : TAINA LYRA DA SILVA
DATE: 30/08/2022
TIME: 14:00
LOCAL: Google Meet - meet.google.com/tmw-yykz-ygh
TITLE:

SEED MORPHOPHYSIOLOGY AND STORAGE OF FOREST SPECIES FROM THE BAIANA HILEIA.

KEY WORDS:

Biometry; numbness; viability.

PAGES: 74
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Produção e Beneficiamento de Sementes
SUMMARY:

The Hileia Baiana presents species with diversified characteristics that are little explored, facing difficulties in the identification of its fauna and consequently in the conservation of this ecosystem. In this sense, the present research aimed to describe the morphophysiology of seeds and storage of forest species from Hileia Baiana. The experiments were carried out in the Seed Analysis Laboratory of the Arboretum Program and forest seeds of the following species were used: Aegiphila integrifolia (Jacq.), Diospyros lasiocalyx (Mart.) B. Wall and Margaritaria nobilis L. The water content was evaluated. , biometrics, mass of 1000 thousand seeds. In this way, it showed the standardization of the seeds of Aegiphila integrifolia, Apeiba tibourbou Aubl. and Margaritaria nobilis, as well as variability in the seed characters of Diospyros lasiocalyx. In the second chapter, it was determined the overcoming of seed dormancy using the following treatments: (T1) intact seeds; (T2) mechanical scarification with sandpaper nº 80; (T3) thermal scarification with distilled water at 100 ºC and immersion for 24 hours; (T4) immersion in gibberellic acid at 500 mg L-1 for 24 hours; (T5) immersion in PROGIBB solution at 500 mg L-1 for 24 hours; (T6) immersion in distilled water for 24 hours; (T7) mechanical scarification and immersion in distilled water for 24 hours and (T8) immersion in 2% sodium hypochlorite for 2 minutes and immersion in distilled water at 50 °C for 5 minutes. A. tibourbou showed 50% germination and emergence of D. lasiocalyx (33%), however it is still necessary to apply other methods for the germination of the other species. In the third chapter, the seeds were stored in a cold chamber at 5 °C in a 2 x 4 x 5 factorial scheme, with two types of packaging: plastic (waterproof) and paper (semipermeable), four storage methods: freezing in a freezer, powdered natural drying period of 24 hours, seeds with addition of fungicide, newly processed seeds and five storage times (0, 10, 20, 30 and 40 days). The water content found for the newly collected seeds was 37.26% and the weight of a thousand seeds was 65.20 g. The treatments proved to be inefficient for the conservation of the species, not resulting in the emergence of seeds. The newly processed seeds showed an average germination of 61%, thus, due to the difficulty of storing and conserving Sloanea obtusifolia in a longer period after processing, strategies must be taken into account, as a way of guaranteeing the permanence of the species and its Genetical diversity.

BANKING MEMBERS:
Presidente - 3025873 - KHETRIN SILVA MACIEL
Interna - 3027379 - JANNAINA VELASQUES DA COSTA PINTO
Externo à Instituição - JORGE LUIZ FORTUNA - UNEB
Externa à Instituição - LIANA HILDA GOLIN MENGARDA