Effect of ABA and GA3 on protein mobilization in embryos and cotyledons of angico [Anadenanthera peregrina (L.) speg] seeds during germination

Barduche, Douglas; Paiva, Renato; Lopes, M. A.; Paiva, Edílson

doi:10.1590/s1516-89131999000200002

Cited by 1 publication

(1 citation statement)

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“…Thus, since oxygen is the substrate of the ABA 8'-hydroxylase enzyme, its low availability indirectly promotes DELOS: Desarrollo Local Sostenible, Curitiba, v.16, n.44, p. 1434Curitiba, v.16, n.44, p. -1464Curitiba, v.16, n.44, p. , 2023 an increase in ABA levels (Krochko et al, 1998). ABA hormone prevents seed germination by inhibiting the expression of genes that encode enzymes involved in the degradation of reserves, such as amylases and proteases (Barduche et al, 1999). Benech-Arnold et al (2006) observed an increase in sensitivity to ABA in embryos of Hordeum vulgare L. when seeds are subjected to hypoxia.…”

Section: Resultsmentioning

confidence: 99%

Reinvigoration of corn seeds (common, popcorn, sweet and super sweet) by hydroconditioning

Maximiano,

Carmona,

Souza

et al. 2023

Rev. DELOS

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Hydroconditioning has been tested in some crops as an attempt to improve seed performance in the field. Minimum germination standards for corn (Zea mays L.) seeds in Brazil varies from 85% for common, 70% for popcorn and sweet and 60% for super sweet one, due to genotypic effect on physiological seed quality. This study aimed to evaluate the effects of periods of hydroconditioning (0, 30, 60, 90 and 120 minutes) and gas insufflation techniques (atmospheric air, concentrated oxygen and none) on seed germination and vigor of corn seeds of different physiological qualities (high and low) and types (common, popcorn, sweet and super sweet). The experiment was carried out in a 5x3x2 factorial design for each corn type, with four replicates. The evaluated parameters comprised water content, germination and electrical conductivity of seeds; main root and seedling length and dry mass of seedlings. Positive effects of the hydroconditioning were observed on seed reinvigoration of corn of all qualities and types and the best results were achieved with hydroconditioning with air or oxygen insufflation, during 60 to 90 minutes, which is therefore recommended to reinvigorate seeds of common, popcorn, sweet and super sweet corn.

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Section: Resultsmentioning

confidence: 99%