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- Title
Enzymatic activity in braúna seeds subjected to thermal stress.
- Authors
da Mata Ataíde, Glauciana; de Lima e Borges, Eduardo Euclydes; Flores, Andressa Vasconcelos
- Abstract
To occur seed germination distinct hydrolytic enzymes work together, enabling primary root protrusion. The objective of this study was to investigate changes in the activities of α-amylase, β-amylase, and glucose-6-phosphate dehydrogenase (G6PdH) during germination of Melanoxylon brauna Schott. seeds under thermal stress. To this end, seeds of this species were germinated under constant temperature (10, 25, 30 or 40°C) and samples were collected every 24h during a 96-h period, in which the activity of the enzymes were evaluated. At 25 and 30°C, optimal temperatures for the germination of the species, the activities of α-amylase, β-amylase, and G6PdH increased with seed imbibitions. At 10 and 40°C, enzyme activities decreased, impairing the germination process.
- Subjects
CAESALPINIACEAE; EFFECT of temperature on plants; EFFECT of stress on plants; GERMINATION; GLUCOSE-6-phosphate dehydrogenase; ALPHA-amylase; BETA-amylase
- Publication
Ciência Rural, 2016, Vol 46, Issue 6, p1044
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/0103-8478cr20141800