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Annals of Botany 90: 149-152, 2002
© 2002 Annals of Botany Company

Silica Accumulation in Long-lived Leaves of Sasa veitchii (Carrière) Rehder (Poaceae–Bambusoideae)

H. MOTOMURA*,1, N. MITA2 and M. SUZUKI1

1 The Botanical Garden, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-0862, Japan and 2 Research Center for Deep Geological Environments, Geological Survey of Japan, 1-1-1 Higashi, Tsukuba,Ibaraki 305-8567, Japan

* For correspondence. Fax +81 22 217 6788, e-mail hmochi{at}mail.cc.tohoku.ac.jp

Received: 10 January 2002; Returned for revision: 25 January 2002; Accepted: 25 March 2002

ABSTRACT

Silica accumulation in long-lived leaves of Sasa veitchii was investigated using the molybdenum blue method. In general, silica accumulation was rapid during spring and summer, and slow during winter. The leaves continuously accumulate silica throughout their life. The significance of these observations is discussed in relation to two hypotheses for silica accumulation in plants: (1) that silica accumulation is a result of water consumption by the plant; and (2) that silica is actively accumulated to protect the plant. The results of the present study support the former hypothesis.

Key words: Sasa veitchii (Carrière) Rehder, bamboo, Poaceae, leaf, silica accumulation, ageing, sigmoid curve, molybdenum blue method.


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