Banca de QUALIFICAÇÃO: YNGLETY CASCAES PEREIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : YNGLETY CASCAES PEREIRA
DATE: 30/10/2020
TIME: 09:00
LOCAL: On line
TITLE:

24-EPIBRASSINOLIDE INDUCES PROTECTION AGAINST WATERLOGGING AND ALLEVIATES IMPACTS ON THE ROOT STRUCTURES, PHOTOSYNTHETIC MACHINERY AND BIOMASS IN SOYBEAN

KEY WORDS:

Brassinosteroids. Gas Exchange. Glycine max. Growth. Hypoxia. Metaxylem.

PAGES: 39
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Fisiologia de Plantas Cultivadas
SUMMARY:

Climate change can have negative effects on plant growth and physiology, inducing various abiotic stresses and, consequently, limiting productivity. Waterlogging is an environmental threat that limits crop growth and yield Ensuring productivity in adverse environmental conditions is a priority, given the need to ensure food security. 24-Epibrassinolide (EBR) is one of the most active forms of brassinosteroids that are plant steroids, involved in promoting plant growth and development. Recent studies have shown that these steroids can also act in the adaptation and tolerance of plants against various abiotic stresses. Our hypothesis was based on the damage caused by waterlogging and the possible benefits of EBR on plant metabolism. The aim of this research was to investigate the anatomical, biochemical and physiological responses of the application of EBR in Glycine max plants under waterlogging. This study used a completely randomized factorial design with two water conditions (control and waterlogging) and three concentrations of 24-epibrassinolide (0, 5 and 10 nM EBR). This research clearly demonstrated that exogenous EBR protected soybean plants against oxidative stress caused by waterlogging, which was confirmed by the improvements in the root anatomy, photosynthetic machinery and biomass. Application of EBR attenuated the negative impacts of waterlogging under Chl a, Chl b, Total Chl and Car contents, the concentration of 10 nM EBR induced increases of 14%, 47%, 19% and 111%, respectively, when compared to the waterlogging + 0 nM of EBR treatment. The results prove that pre-treatment with EBR improved the tolerance of soybean plants to waterlogging and that the application of 10 nM EBR produced better effects on biomass.

BANKING MEMBERS:
Presidente - 1803899 - ALLAN KLYNGER DA SILVA LOBATO
Externa à Instituição - BRUNA SAYURI FUJIYAMA - NENHUMA
Externo à Instituição - DOUGLAS JOSÉ MARQUES - UFU
Externo à Instituição - FLÁVIO JOSÉ RODRIGUES CRUZ - UFRPE