Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8892914 | Scientia Horticulturae | 2018 | 6 Pages |
Abstract
We investigated the role of pretreatment of seeds with hydrogen peroxide (H2O2) in promoting the tolerance of seedlings of Glycine max to waterlogging. Soybean seeds were pretreated with a solution of H2O2 70â¯mM or water for 24â¯h under aeration, and then were placed in plastic bags containing substrate. At 12â¯days after sowing, the seedlings were subjected to waterlogging for 32â¯days. There were three evaluations: 0, 16â¯days and 32â¯days of waterlogging. Biomass accumulation, root volume, stem diameter, gas exchanges, activity of antioxidant system and cell membrane damages were evaluated. The pretreatment of seeds with H2O2 generated seedlings with elevated activity of antioxidant enzymes, low H2O2 and O2â. content, and low cell membrane damages. Hydrogen peroxide pretreatment also resulted in increased content of photosynthetic pigments and net photosynthetic rate, high biomass accumulation, root volume and stem diameter. H2O2 pretreatment of soybeans seeds generated seedlings more tolerant to waterlogging. There is probably a stress memory involved in the process of induction of tolerance in soybeans mediated by hydrogen peroxide.
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Authors
Cinthia Aparecida Andrade, Kamila Rezende Dázio de Souza, Meline de Oliveira Santos, Dayane Meireles da Silva, Jose Donizeti Alves,