Morphogenic effects of abiotic stress: reorientation of growth in Arabidopsis thaliana seedlings

Leaves and roots of Raphanus sativus have been used in various parts of the world to treat cancer and as antimicrobial and antiviral agents. The phytochemistry and pharmacology of this radish is reviewed. The structures of the compounds isolated and identified are listed and aspects of their chemistry and pharmacology are discussed. The compounds are grouped according to structural classes.

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Raphanus sativus (Radish): their chemistry and biology.

Cadmium-induced oxidative stress symptoms such as lipid peroxidation and H2O2 production were examined in the marine alga Nannochloropsis oculata. Changes in antioxidant enzyme levels and isozyme patterns were also examined. Increasing concentrations of Cd produced growth inhibition. Among the responses to added Cd, the H2O2 content and malonyldialdehyde accumulation increased significantly, indicating a state of oxidative stress. In the case of ascorbate peroxidase activity the increase was about 2.5 times and a marked induction of the isozyme APX2 contributed to this increase. Guaiacol peroxidase activity increased about 4-fold, this being due mainly to the isozyme GPX3. Catalase activity increased slightly, whereas superoxide dismutase and glutathione reductase activity decreased markedly. Alterations of antioxidant enzyme levels and isozyme pattern changes in Cd-treated alga suggest that they might be involved in the heavy metal tolerance in this alga.

Cadmium-induced changes in antioxidant enzymes from the marine alga Nannochloropsis oculata

Purification and characterization of membrane-bound peroxidases from Metroxylon sagu

Effect of sulfur dioxide on ROS production, gene expression and antioxidant enzyme activity in Arabidopsis plants

Characteristics of six isoperoxidases from Korean radish root

Effects of Na2SO3 on the activities of antioxidant enzymes in geranium seedlings

Purification and characterization of a cationic isoperoxidase from scented-geranium.

Purification and immunological relationships of six radish isoperoxidases

Callus was induced from the petioles of scented-geranium (Pelargonium graveolense) in MS medium containing various concentrations of plant growth regulators. The highest frequency of more than 70% of callus was induced in 2 mg/l NAA and 0.5 mg/l BAP or 2 mg/l 2,4-D and 0.5 mg/l BAP combined treatment, while not in 2,4-D, NAA or BAP alone. When the callus was transferred to the MS medium containing 0.05 mg/l NAA and 0.5 mg/l BAP, were highest intensity of shoot formation, 14 shoots/callus, was induced after 5 weeks. The highest rooting was observed on hormone-free rooting media from the regenerated shoots after 3 weeks, indicating that the regeneration from geranium callus might be possible by changing the hormone ratios. Peroxidase (POD) specific activities in callus induced from 2 mg/l NAA and 0.5 mg/l BAP were higher than those of 2 mg/l 2,4-D and 0.5 mg/l BAP callus during the entire culture periods. POD isozyme C3 was the main cathodic POD isozyme expressed in NAA and BAP callus, while C1 was the main in 2,4-D and BAP callus. However, anodic POD isozymes, A1, A2 and A3 were expressed with similar activities in both hormone combinations.

https://www.koreascience.kr:443/article/JAKO200003043027579.pdf

Mi Young Lee

Papers

Characteristics of six isoperoxidases from Korean radish root

Effects of Na2SO3 on the activities of antioxidant enzymes in geranium seedlings

Purification and characterization of a cationic isoperoxidase from scented-geranium.

Purification and immunological relationships of six radish isoperoxidases

Plant Regeneration of Geranium (Pelargonium graveolense) Callus and Changes of Peroxidase Isozyme Pattern