000			02487nab a2200325 i 4500
003			BR-BrBNA
005			20250508204955.0
008			250508b2020 bl.mr|pooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aF03 _b1670
100			_aAnjos Neto, Antônio Pereira dos
100			_aOliveira, Gustavo Roberto Fonseca
100			_aMello, Simone da Costa
100			_aSilva, Marcio Souza da
100			_aGomes-Junior, Francisco Guilhien
100			_aNovembre, Ana Dionisia da Luz Coelho
100			_aAzevedo, Ricardo Antunes
245			_aSeed priming with seaweed extract mitigate heat stress in spinach: effect on germination, seedling growth and antioxidant capacity
500			_aPublicação on-line; 42 ref.; 7 illus; Sumaries (En)
520			_a ABSTRACT: Spinach seeds are sensitive to high temperatures during germination and plant growth. It is known that seed priming with water or with seaweed extract (SWE) may enhance germination and seedling growth. The objective of this study was to evaluate the effects of seed priming with SWE (Ascophyllum nodosum) on the germination, seedling growth and antioxidant capacity of spinach seedlings under conditions of heat stress. Five concentrations of SWE (0.0, 0.15, 0.30, 0.60 and 1.2%) were used for priming the seeds under two temperatures (15 and 30 °C). Seeds primed with 0.3% SWE had the greatest activity of antioxidant metabolism and showed improved germination percentage, germination speed and seedling vigor under conditions of heat stress (30 °C) compared to nonprimed controls. Hydropriming and priming with 0.3% SWE resulted in lower contents of hydrogen peroxide (H2O2) and malondialdehyde (MDA) under heat stress than control (nonprimed spinach seeds). This study showed that seed priming with SWE was effective to mitigate stress due to high temperatures and to improve spinach seed germination and seedling vigor. Key words: Spinacea oleracea, Ascophyllum nodosum, seed-primed, thermal stress.
650			_aESPINAFRE
650			_aTRATAMENTO DE SEMENTE
650			_aGERMINAÇÃO
650			_aSTRESS
650			_aTEMPERATURA
773	0		_01365 _9344638 _dCampinas-SP Instituto Agronômico - Coordenadoria da Pesquisa Agropecuária 1941 _o2024-4960 _tBragantia (Brazil) _x0006-8705 _gv. 49 p. 377-386; (2020) _wBR2025001034
856			_uhttps://www.scielo.br/j/brag/a/SrHV7fKkyQBNddTrx4XFJ8B/?format=pdf&lang=en
942			_cANA
999			_c331391 _d331391