Banca de DEFESA: GLEICIANE RODRIGUES DOS SANTOS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : GLEICIANE RODRIGUES DOS SANTOS
DATE: 19/05/2022
TIME: 08:00
LOCAL: Realizado por videoconferência
TITLE:

"METABOLIC AND ROOT CHANGES IN Euterpe oleracea BIOSTIMULATED WITH Bacillus subtilis"

KEY WORDS:

 Açaí, Biostimulants, Sustainability, Productivity, Management

PAGES: 81
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Microbiologia Agrícola
SUMMARY:

Under conditions of biotic and abiotic stress, it has impaired the growth and development of açai (Euterpe oleracea Mart.) plants in the Amazon region. In view of this, research is carried out to mitigate the effects of water scarcity, high nutritional demand that consequently promote slow initial growth. Some plant growth-promoting rhizobacteria (PGPR) have gained importance due to the potential for use in agriculture that alleviate the effects of abiotic stress, evidencing their use of these microorganisms as sustainable strategies for agricultural production. However, the mechanisms of action of biostimulants are enigmatic, as different PGPRs can interact uniquely with the plant of interest, which is the main bottleneck for their use in the agricultural sector. The aim of this study was to evaluate changes in primary metabolism (both biochemically and physiologically) and later to characterize changes in root architecture in açaí plants biostimulator with Bacillus subtilis. The experiment was carried out in a completely randomized design in açai seedlings inoculated with B. subtilis and non-inoculated seedlings. The metabolism of açai plant’s when inoculated with B. subtilis stimulated the biosynthesis of phytohormones, which consequently stimulated the photosynthetic machinery, resulting in greater absorption of nutrients and the synthesis of primary compounds. It is noticeable the increase in the content of amino acids, organic acids and soluble sugars that subsidized the mechanisms underlying growth promotion such as energy production and protein synthesis that allow promoting plant growth in greater proportion compared to uninoculated plants. Resulting in accumulation of root biomass, increase in surface area and increase in the number of lateral root tips and ramifications. The identification of key metabolites opens study perspectives for the growth and development of plants that are more responsive to this type of input and, consequently, more adapted to adverse environmental conditions.

BANKING MEMBERS:
Externo à Instituição - FABIO LOPES OLIVARES - UENF
Presidente - 1551252 - GISELE BARATA DA SILVA
Interno - 1521814 - HUGO ALVES PINHEIRO
Externo à Instituição - TERCILIO CALSA JUNIOR - UFPE
Externo à Instituição - WAGNER LUIZ ARAÚJO - UFV