Banca de DEFESA: CINTYA MIKAELLY PEREIRA GAIA SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CINTYA MIKAELLY PEREIRA GAIA SOUZA
DATE: 24/02/2022
TIME: 08:00
LOCAL: googlemeet
TITLE:

PHYSIOLOGICAL BEHAVIOR IN OSMOCONDITIONED COWBEAN SEEDS

KEY WORDS:

Hydroconditioning. Osmoconditioning. Vigna unguiculata.

PAGES: 96
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Produção e Beneficiamento de Sementes
SUMMARY:

Physiological conditioning consists of a controlled hydration of the seeds over a certain time, allowing the initiation of metabolic processes for germination. Thus, the objective was to evaluate the effect of conditioning and physiological behavior with PEG 6000 and NaCl on cowpea seeds. The research was carried out at the Laboratory of Analysis of Seeds and Plants, of the Federal University of Agreste of Pernambuco, in Garanhuns - PE, with seeds of cowpea (Vigna unguiculata). Two experiments were installed, the first was using PEG 6000 and the second with NaCl. A completely randomized design was used in a 3x4 factorial scheme (3 cultivars and 4 treatments) with four replications of 25 seeds each. The conditioning methods tested were: hydropriming (H₂O) and osmopriming in PEG 6000 and NaCl solutions at concentrations -0.4MPa; -0.8MPa and -1.2MPa. Emergence test, emergence speed index, seedling performance (length of shoot and root, fresh mass of shoot and root and dry mass of shoot and root), photosynthetic pigments (chlorophyll a, b, carotenoids and a/b ratio), relative water content, electrolyte extravasation and leaf area index. In the experiment with PEG, it was possible to observe that, in general, the effects of conditioning in the seeds of the three cultivars of cowpea showed tolerance to initial water stress, but the seeds of the Paulistinha cultivar had higher seedling performance when osmoconditioned, showing with better physiological potential. In the experiment with NaCl, when osmoconditioned, the seeds of the Paulistinha and Corujinha cultivars showed greater tolerance to the initial saline stress in the evaluated parameters, evidencing that the germination potential of cowpea is little changed even in initial conditions of saline stress.

BANKING MEMBERS:
Presidente - 1648101 - EDILMA PEREIRA GONCALVES
Interna - 1209511 - KEDMA MARIA SILVA PINTO
Interno - 1580659 - MACIO FARIAS DE MOURA
Externa à Instituição - DEBORA TERESA DA ROCHA GOMES FERREIRA