Iraqi J. Agric. Res. Vol. 17 No. 1 pp105-113 (2012)
EFFECT OF GIBBERLLIC ACID AND LIQUORIC EXTRACT ON SEED GERMINATION OF BLACK SEED ( Nigella sativa L. ) Z. S. Lazim
S. M. Sulaiman
ABSTRACT A laboratorial experiment was conducted in the Laboratory of Higher Studies and Scientific Research, Department of Horticulture, College of Agriculture, Sulaimani University at the growing season 2010 to study the effect of seed soaking treatments on black seed (Nigella sativa L.) in different solutions for two soaking periods. Treatments included the soaking of seeds in distilled water as control soaking treatment and also soaking the seeds in three concentrations of Gibberllic acid (GA3) solutions (50, 100 or 150 mg . l-1), and soaking the seeds in extraction solutions of liquorice at concentrations (2.5, 5.0, 7.5 g . l-1) for two periods of time (24 and 48 hrs). Results showed that seed soaking treatment of liquorice root extraction solution with (2.5 g . l-1) gave the highest values of germination percentage (81.33%), germination speed (8.47 days), seedlings height (7.24 cm), radicle length (4.08 cm) and plumule length (3.21 cm). When soaking periods were compared, results showed that seed soaking for 24 hrs gave the highest values of germination percentage (66.29%), seedlings height (4.94 cm), radical length (2.73 cm) and plumule length (2.21 cm). As respect to the interaction of treatments, the combination treatment of soaking the seeds in liquorice root extraction solution (2.5 g . l-1) for (24 hrs) gave the highest values of germination percentage (88%), germination speed (8.49 days), seedlings height (8.24 cm), plumule length (3.66 cm) and radical length (4.59 cm).
University of Sulaimani / College of Agriculture / Sulaimani / Iraq
and soaking the seeds in extraction solutions of liquorice at. concentrations (2.5, 5.0, 7.5 g . l-1. ) for two periods of time (24 and 48 hrs). Results showed that ...
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... Hongwei Shi, and Jie Yan*. College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310015,. P. R. China. E-mail: [email protected].
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