Promotion of flowering by Mn-EDDHA in the long-short-day plant Wolffia arrhiza (L.) Horkel ex Wimm

• Published in: Journal of plant physiology Vol. 153; no. 5; pp. 777 - 780
• Main Authors: Krajnčič, Božidar, Nemec, Jože, Tojnko, Stanislav, Vogrin, Andrej
• Format: Journal Article
• Language: English
• Published: Jena Elsevier GmbH 1998; Elsevier
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Biology and morphogenesis of the reproductive apparatus. Photoperiodism, vernalisation; Chelating agent EDDHA; Economic plant physiology; flowering; Flowering, floral biology, reproduction patterns; Fundamental and applied biological sciences. Psychology; gibberellic acid GA 3; Growth and development; Mn-EDDHA; Plant physiology and development; Vegetative and sexual reproduction, floral biology, fructification; Wolffia arrhiza (L.) Horkel ex Wimm; Chelating agent EDDHA; Mn-EDDHA · 2H 2O; flowering; Mn-EDDHA; Wolffia arrhiza (L.) Horkel ex Wimm; gibberellic acid GA 3; Monocotyledones; Regulation(control); Lemnaceae; Angiospermae; Chelating agent; Flowering; Gibberellin; Spermatophyta; Photoperiod; Growth regulator treatment; Pretreatment; Manganese
• ISSN: 0176-1617; 1618-1328
• DOI: 10.1016/S0176-1617(98)80235-6

Investigations were made into axenically cultured long-short-day (LD-SD) plants Wolffia arrhiza, grown under 16 h LD and 8 h SD conditions and light intensity of 48 μmol · m −2 · s −1. The experiments were aimed at establishing the effects of GA 3, EDDHA, and Mn-EDDHA, as well as their combinations on flowering. In the used concentrations under LD conditions, flowering was induced by GA 3 (0.1−0.7 μmol · L −1) and by EDDHA (of 1.5–21 μmol · L −1). GA 3 in higher concentrations (1.4–2.9 μmol · L −1) did not induce flowering. In the nutrient solution with Mn-EDDHA (1.5 μmol · L −1) flowering was promoted significandy under LD and SD conditions when compared with flowering in the same nutrient solution with an equivalent amount of manganese in the nonchelate form 1.5 μmol · L −1 MnCl 2. Flowering was promoted to the greatest extent under LD conditions in the nutrient solution with Mn-EDDHA and the addition of combinations of = optimal concentrations of GA 3 (0.4μmol · L −1) and EDDHA (19.5μmol · L −1). The obtained results also show that GA 3, EDDHA and Mn-EDDHA may replace the SD requirement for flowering in the examined plants.