Banca de QUALIFICAÇÃO: MARIA ANDRESSA FERNANDES GONCALVES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARIA ANDRESSA FERNANDES GONCALVES
DATA : 06/12/2023
HORA: 08:30
LOCAL: On line
TÍTULO:

Biochar mitigates the deleterious effects on biomass in soybean plants exposed to water deficit, enhancing leaf development, stomatal regulation and gas exchange

PALAVRAS-CHAVES:

Drought; Euterpe oleracea; Glycine max; Growth; Soil conditioner.

PÁGINAS: 64
RESUMO:

Drought is the primary global limiting factor for agricultural production, and soybean plants are sensitive to water deficits. Management strategies have been studied to improve the yield in water- district  areas.  Applying  biochar  (BC)  improves  substrates'  physical  and  chemical  properties, increasing water retention and nutrient bioavailability. This study aimed to investigate whether the application of BC derived from Acai agroindustry waste could mitigate the deleterious effects of water deficit in soybean plants. The experiment was randomized using five proportions of BC [0.0, 2.5, 5.0, 7.5, and 10.0% (w/w)] obtained from the pyrolysis of Euterpe oleracea seeds at 700 °C. In general, BC provided the best results at a concentration of 10% (w/w). BC positively modulated the stomatal  mechanisms  of  plants  subjected  to  water  deficit,  with  increased  stomatal  density  and functionality  detected  on  both  faces.  This  soil  conditioner  benefited  physiological  performance, promoting significant increases in the net photosynthetic rate (17%), water-use efficiency (88%), and carboxylation  instantaneous  efficiency  (179%),  and  minimizing  the  deleterious  effects  of  water deficit  on  the  gas  exchange  due to  the  benefits  of  stomatal  regulation.  The  use  of  BC  induced significant increases in biomass, including leaf dry matter (41%), root dry matter (36%), and total dry matter (83%). This study proved that BC plays an essential role in substrate water availability, favours leaf development, and improves the performance of the photosynthetic machinery in soybean plants subjected to water deficit.

MEMBROS DA BANCA:
Presidente - 1803899 - ALLAN KLYNGER DA SILVA LOBATO
Externo à Instituição - FLÁVIO JOSÉ RODRIGUES CRUZ - IFAP
Externo à Instituição - JOÃO RODRIGO COIMBRA NOBRE - UEPA
Externa à Instituição - MARIA ANTONIA MACHADO BARBOSA - UEMG