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Submitted on: 11 May 1998.
Revised on: 13 August 1998.
Accepted on: 01 September 1998.
___________________AQUATIC BOTANY---ELSEVIER
Submitted on: 12 February 2017.
Revised on: 09 June 2017.
Accepted on: 03 August 2017.
___________________AQUATIC BOTANY---ELSEVIER
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Submitted on: 19 June 2023.
Revised on: 02 September 2023.
Accepted on: 25 September 2023.
___________________AQUATIC BOTANY---ELSEVIER
Submitted on: 18 August 2000.
Revised on: 07 November 2000.
Accepted on: 02 December 2000.
___________________AQUATIC BOTANY---ELSEVIER
http://reply.papertrans.cn/1/24/2332/2332-28.png
http://reply.papertrans.cn/1/24/2332/2332-29.png
http://reply.papertrans.cn/1/24/2332/2332-30.png