What is enzymatic antioxidants in plants?
To ensure survival, plants have developed efficient antioxidant machinery having two arms, (i) enzymatic components like superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), glutathione reductase (GR), monodehydroascorbate reductase (MDHAR), and dehydroascorbate reductase ( …
What are the enzymes of antioxidants?
Superoxide dismutase (SOD), glutathione peroxidase (GPX) and catalase are the key enzymatic antioxidants of this defense system by which the free radicals that are produced during metabolic reactions are removed.
How do antioxidants help plants?
These low molecular weight antioxidants function as redox buffers that interact with numerous cellular components and influence plant growth and development by modulating processes from mitosis and cell elongation to senescence and death 17.
Is sulforaphane an enzyme?
Sulforaphane (SFN), is a naturally occurring isothiocyanate found in cruciferous vegetables, and is richest in broccoli sprouts. It is the most potent inducer of PII enzymes identified to date and is thought to act via activation of the Nrf2 transcription factor and the Anti-oxidant Response Element (ARE).
What is ROS in plant?
Plants are subjected to various environmental stresses throughout their life cycle. Reactive oxygen species (ROS) play important roles in maintaining normal plant growth, and improving their tolerance to stress.
What minerals are antioxidants?
Antioxidants and free radicals Antioxidants are found in certain foods and may prevent some of the damage caused by free radicals by neutralising them. These include the nutrient antioxidants, vitamins A, C and E, and the minerals copper, zinc and selenium.
What are the sources of antioxidants?
Good sources of specific antioxidants include:
- allium sulphur compounds – leeks, onions and garlic.
- anthocyanins – eggplant, grapes and berries.
- beta-carotene – pumpkin, mangoes, apricots, carrots, spinach and parsley.
- catechins – red wine and tea.
- copper – seafood, lean meat, milk and nuts.
Is sulforaphane an antioxidant?
The ITC sulforaphane, which is derived from glucoraphanin, has garnered particular interest as an indirect antioxidant due to its extraordinary ability to induce expression of several enzymes via the KEAP1/Nrf2/ARE pathway.
Is sulforaphane a polyphenol?
Well examined bioactive substances from broccoli, cauliflower and green tea involve the isothiocyanate sulforaphane (11), the polyphenol family of catechins (12) and the polyphenol quercetin, which is one of the most abundant flavonoids found in many fruits and vegetables, such as broccoli, apples, onions and berries ( …