PART - 2 - Unit IV : CH - 13 Plant Growth and Development — BIOLOGY STD 11 Science — Question

(1) Climactic Respiration : Ethylene is highly effective in fruit ripening. It enhances the respiration rate during ripening of the fruits. This rise in rate of respiration is called respiratory climactic.
(2) Bakanae (Foolish Seedling): Some farmers of Japan saw plants with thin and yellow leaves, taller and less productive in the paddy fields. This disease of paddy was called Bakanae disease or foolish seedling disease. This disease is caused by a fungus called Gibberella fujikuroi. Yabuta, Yumiki and Hayashi isolated gibberellin from this fungus and named it gibberellic acid. They found that spraying the juice extracted from this fungus on healthy paddy plants also causes disease in them.