Article ; Online: Effect of Reactive Oxygen Scavenger N,N′-Dimethylthiourea (DMTU) on Seed Germination and Radicle Elongation of Maize
International Journal of Molecular Sciences, Vol 24, Iss 21, p
2023 Volume 15557
Abstract: Reactive oxygen species (ROS) are an important part of adaptation to biotic and abiotic stresses and regulate seed germination through positive or negative signaling. Seed adaptation to abiotic stress may be mediated by hydrogen peroxide (H 2 O 2 ). The ... ...
Abstract | Reactive oxygen species (ROS) are an important part of adaptation to biotic and abiotic stresses and regulate seed germination through positive or negative signaling. Seed adaptation to abiotic stress may be mediated by hydrogen peroxide (H 2 O 2 ). The effects of the ROS scavenger N,N′-dimethylthiourea (DMTU) on maize seed germination through endogenous H 2 O 2 regulation is unclear. In this study, we investigated the effects of different doses of DMTU on seed endogenous H 2 O 2 and radicle development parameters using two maize varieties (ZD958 and DMY1). The inhibitory effect of DMTU on the germination rate and radicle growth was dose-dependent. The inhibitory effect of DMTU on radicle growth ceased after transferring maize seeds from DMTU to a water medium. Histochemical analyses showed that DMTU eliminated stable H 2 O 2 accumulation in the radicle sheaths and radicles. The activity of antioxidant enzyme and the expression of antioxidant enzyme-related genes ( ZmAPX2 and ZmCAT2 ) were reduced in maize seeds cultured with DMTU compared with normal culture conditions (0 mmol·dm −3 DMTU). We suggest the use of 200 mmol·dm −3 DMTU as an H 2 O 2 scavenger to study the ROS equilibrium mechanisms during the germination of maize seeds, assisting in the future with the efficient development of plant growth regulators to enhance the seed germination performance of test maize varieties under abiotic stress. |
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Keywords | seed germination ; DMTU ; H 2 O 2 ; maize ; gene expression ; radicle elongation ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999 |
Subject code | 580 |
Language | English |
Publishing date | 2023-10-01T00:00:00Z |
Publisher | MDPI AG |
Document type | Article ; Online |
Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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