EVERYDAY SCIENCE

Detailed explanation-1: -Gibberellins were first isolated from the fungus Gibberella fujikuroi, the cause of the foolish seedling disease of rice (Figure 1-37D). The best-known gibberellin is gibberellic acid. Compounds such as vitamin E and helminthosporol also have gibberellin-like activity.

Detailed explanation-2: -Gibberellic acid, a metabolic product of the fungus Gibberella fujikuroi: Some observations on its production and isolation.

Detailed explanation-3: -The rice pathogen Gibberella fujikuroi (mating population C) is able to produce large amounts of GAs, especially the bioactive compounds gibberellic acid (GA3) and its precursors, GA4 and GA7. The main steps of the biosynthetic pathway have long been established from the identification of intermediates in wild-type G.

Detailed explanation-4: -Gibberella fujikuroi is a fungal plant pathogen. It causes bakanae disease in rice seedlings.

Detailed explanation-5: -The gene coding for copalyl diphosphate synthase (CPS), which represents the first gene of the gibberellin pathway, was isolated from the rice pathogen Gibberella fujikuroi. This fungus is used commercially for the production of gibberellic acid and related gibberellins.