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Annals of Botany 37: 427-438, 1973
© 1973 Annals of Botany Company

RESEARCH-ARTICLE

The Influence of Boron on the RNA Level, {alpha}-amylase Activity, and Level of Sugars in Germinating Themeda triandra Forsk Seed

C. F. CRESSWELL and HELEN NELSON1

Department of Botany, University of the Witwatersrand Johannesburg, South Africa

Received: 19 July 1972   

The presence of boron in the germination medium markedly increased the RNA level and a-amylase activity in the embryo and endosperm tissue of dormant 2-month-old seed. In non-dormant 14-month-old seed the presence of boron slightly increased the level of RNA, but had virtually no effect on the {alpha}-amylase activity. Gibberellic acid (GA2) in the germination medium also increased the {alpha}-amylase activity in the 2-month-old seed; the greatest activity was obtained when both boron and GA2 were together in the germination medium. Changes in starch, sucrose, and reducing sugar levels were obtained in the seed, in the presence of boron. Indications of changes in RNA level, a-amylase activity, and sugar translocation in non-germinating seed occur between the dormant and non-dormant state. The relationship between boron and gibberellic acid is discussed.


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