Anti-ABA polyclonal antibody

Vitamin C (ascorbic acid) is a complex compound with multiple functions. It is made up of L-ascorbic acid, L-monodehydroascorbic acid (MDHA), and L-dehydroascorbic acid (DHA) and oxidation products of them. Vitamin C is an antioxidant molecule involved in plant and animal metabolism and also a co-factor of many enzymes. You have the plant foods — which are the best human diet — and from those you can get vitamin C. While synthetic vitamin C is chemically indistinguishable from plant vitamin C, the micronutrients and phytochemicals in fruit and vegetables influence how bioavailable vitamin C is.

Figure 1. The redox reactions of ascorbate
(Source: Smirnoff N. 2018)

Vitamin C serves a range of functions in the fruit chloroplasts, and is needed for photosynthesis. For one, it's indispensable for directly hunting ROS and H₂O₂. And, like Vitamin C, it's also a member of the xanthophyll cycle, and prevents photoinhibition in photosystem II (PSII). Additionally, it can provide electrons to both photosystems. A shift in vitamin C concentrations completely alters gene expression for the photosynthesis gene. By deficient vitamin C through the knockdown of the expression of dehydroascorbate reductase (DHAR), plants lose chlorophyll a, the large subunit of RuBisCO, and absorb CO₂. Vitamin C can prevent leaf senescence by preventing photosynthesis and countering ROS. And it's a co-factor of ACA oxidase, which produces the plant hormone ethylene. It is also a co-factor of dioxygenases that make abscisic acid and gibberellins, and break down auxins.

The amount of ascorbic acid in plants depends on a variety of factors. Researchers have also found large variations in ascorbic acid from species to species, and even species to species between varieties and developmental stages. Physiological factors that affect plant production of ascorbic acid include environmental (outside) and internal genetic (inside). The light regulation of plant ascorbic acid. Research indicates that many light-responsive elements are present in the promoters of genes involved in the ascorbic acid synthesis pathway (such as GMP, GME, GGP, GPP, GalDH, and GLDH), and these genes are induced by light. Intrinsic genetic factors include genes responsible for ascorbic acid biosynthesis and regulatory factors. For instance, AMR1 negatively regulates the expression levels of the ascorbic acid biosynthesis genes GMP, GME, GGP, GPP, GalDH, and GLDH. The expression of AMR1 increases with leaf senescence, leading to a decrease in ascorbic acid content.

Anti-ascorbic acid polyclonal antibody
Anti-Vitamin C polyclonal antibody
Anti-AA polyclonal antibody
Anti-AsA polyclonal antibody