Results 41 to 50 of about 4,782 (205)

Purification and Characterization of Chloroplast Dehydroascorbate Reductase from Spinach Leaves [PDF]

Plant and Cell Physiology, 2000
Green leaves of plants require the high-level activity that can regenerate ascorbate during photosynthesis. One of such enzyme is dehydroascorbate reductase (DHAR), but the molecular and enzymological properties of the enzyme remain to be fully characterized. In this study, we showed that two major DHAR existed in spinach leaves. The two DHARs occupied
T, Shimaoka, A, Yokota, C, Miyake
openaire   +2 more sources

Changes in the ascorbate-glutathione system during storage of recalcitrant seeds of Acer saccharinum L.

Acta Societatis Botanicorum Poloniae, 2011
Two seed lots of Acer saccharinum (recalcitrant), with an initial moisture content of 50% and 55%, were stored at +3oC for 6 months. After this time, their viability (measured as germinability) reached 100% and 30%, respectively.
Ewelina Ratajczak, Stanisława Pukacka
doaj   +1 more source

Post-harvest chitosan treatment suppresses oxidative stress by regulating reactive oxygen species metabolism in wounded apples

Frontiers in Plant Science, 2022
Mechanical wound on fruit triggers the formation of reactive oxygen species (ROS) that weaken cell walls, resulting in post-harvest losses. This mechanism can be controlled by using fruit preservatives to stimulate fruit antioxidant enzyme activities for
Sabina Ackah, Yang Bi, Sulin Xue, Salimata Yakubu, Ye Han, Yuanyuan Zong, Richard Atinpoore Atuna, Dov Prusky, Dov Prusky   +8 more
doaj   +1 more source

Dehydroascorbate Reductase Affects Non-photochemical Quenching and Photosynthetic Performance [PDF]

Journal of Biological Chemistry, 2008
Ascorbic acid (Asc) is a major antioxidant involved in photoprotection and photosynthetic function in plants. Dehydroascorbate reductase (DHAR) catalyzes the regeneration of Asc from its oxidized state and serves as an important regulator of Asc recycling.
Zhong, Chen, Daniel R, Gallie
openaire   +2 more sources

The Antioxidants of Legume Nodule Mitochondria

Molecular Plant-Microbe Interactions, 2001
The mitochondria of legume root nodules are critical to sustain the energy-intensive process of nitrogen fixation. They also generate reactive oxygen species at high rates and thus require the protection of antioxidant enzymes and metabolites.
Iñaki Iturbe-Ormaetxe, Manuel A. Matamoros, Maria C. Rubio, David A. Dalton, Manuel Becana   +4 more
doaj   +1 more source

Exogenous Allantoin Confers Rapeseed (Brassica campestris) Tolerance to Simulated Drought by Improving Antioxidant Metabolism and Physiology

Antioxidants, 2023
Allantoin is an emerging plant metabolite, but its role in conferring drought-induced oxidative stress is still elusive. Therefore, an experiment was devised to explore the role of allantoin (0.5 and 1.0 mM; foliar spray) in rapeseed (Brassica campestris
Md. Rakib Hossain Raihan, Mira Rahman, Anshu Rastogi, Masayuki Fujita, Mirza Hasanuzzaman   +4 more
doaj   +1 more source

Tobacco chloroplast transformants expressing genes encoding dehydroascorbate reductase, glutathione reductase, and glutathione-S-transferase, exhibit altered anti-oxidant metabolism and improved abiotic stress tolerance [PDF]

, 2011
One approach to understanding the Reactive Oxygen Species (ROS)-scavenging systems in plant stress tolerance is to manipulate the levels of antioxidant enzyme activities. In this study, we expressed in the chloroplast three such enzymes: dehydroascorbate
Bénédicte Le Martret, Miranda Poage, Philip J. Dix, Dix, Philip, Poage, Miranda, Nugent, Gregory D., Gregory D. Nugent, Shiel, Karen, Le Martret, Benedicte, Karen Shiel   +9 more
core   +1 more source

Distribution and Functions of Monodehydroascorbate Reductases in Plants: Comprehensive Reverse Genetic Analysis of Arabidopsis thaliana Enzymes

Antioxidants, 2021
Monodehydroascorbate reductase (MDAR) is an enzyme involved in ascorbate recycling. Arabidopsis thaliana has five MDAR genes that encode two cytosolic, one cytosolic/peroxisomal, one peroxisomal membrane-attached, and one chloroplastic/mitochondrial ...
Mio Tanaka, Ryuki Takahashi, Akane Hamada, Yusuke Terai, Takahisa Ogawa, Yoshihiro Sawa, Takahiro Ishikawa, Takanori Maruta   +7 more
doaj   +1 more source

Improving photosynthesis and the ascorbate-glutathione cycle of own-root and grafted-root chrysanthemums by brassinolide under drought stress

Horticultural Science
Many studies have demonstrated that brassinolide improves the drought tolerance of plants. This study aims to test whether the drought tolerance of chrysanthemums can be improved by brassinolide and to clarify the underlying physiological mechanism.
Peng Ming Yang, Rui Jiao Yang, Song Tao He   +2 more
doaj   +1 more source

Acinetobacter calcoaceticus CSY-P13 Mitigates Stress of Ferulic and p-Hydroxybenzoic Acids in Cucumber by Affecting Antioxidant Enzyme Activity and Soil Bacterial Community

Frontiers in Microbiology, 2018
Ferulic acid (FA) and p-hydroxybenzoic acid (PHBA) are main phenolic compounds accumulated in rhizosphere of continuously cropped cucumber, causing stress in plants. Microbial degradation of a mixture of FA and PHBA is not well understood in soil.
Fenghui Wu, Fenghui Wu, Yan-Qiu An, Yanrong An, Xiu-Juan Wang, Zeng-Yan Cheng, Yue Zhang, Xinwei Hou, Chang-Xia Chen, Li Wang, Ji-Gang Bai   +10 more
doaj   +1 more source