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Submitted on: 27 March 2003.
Revised on: 20 July 2003.
Accepted on: 12 August 2003.
___________________Current Plant Biology---ELSEVIER
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http://reply.papertrans.cn/1/71/7040/7040-34.png
Submitted on: 28 August 2003.
Revised on: 03 December 2003.
Accepted on: 19 December 2003.
___________________Current Plant Biology---ELSEVIER
http://reply.papertrans.cn/1/71/7040/7040-36.png