gibberellin a 9/hemorrhage

Gibberellin (GA)-like substances are shown to be present in the bleeding sap of tomatoes. It is demonstrated that these substances can promote stem elongation in intact tomato plants. Waterlogging of the root system inhibits stem growth and severely reduces the export of GAs from the root to the

(2-Chloroethyl)trimethylammonium chloride (Cycocel or CCC), an inhibitor of gibberellin biosynthesis, when repeatedly supplied to the root systems of balsam (Impatiens glandulifera Royle) plants reduces growth in height and the level of gibberellin-like substances in the bleeding sap that exudes

CCC was shown to be effective in retarding stem growth of sunflower; this effect was overcome by gibberellic-acid application. Using an agar-diffusion technique, the gibberellin (GA) content of sunflower apices treated with CCC was found to be significantly reduced as compared to controls.

Information on the optimal conditions to promote the germination of Lamprocapnos spectabilis (L.) Fukuhara seeds is limited; consequently, this study was conducted to establish the requirements to break their dormancy and promote germination. The selected seeds were morphophysiologically dormant and