Development of viviparous hypocotyls of <i>Bruguiera gymnorrhiza</i>

Zhang Yi-hui; Wang Wen-qing; Chi Minjie; Lin Peng

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Zhang Yi-hui, Wang Wen-qing, Chi Minjie, Lin Peng. Development of viviparous hypocotyls of Bruguiera gymnorrhiza[J]. Haiyang Xuebao, 2006, 28(2): 121-127.

Citation:

Zhang Yi-hui, Wang Wen-qing, Chi Minjie, Lin Peng. Development of viviparous hypocotyls of Bruguiera gymnorrhiza[J]. Haiyang Xuebao, 2006, 28(2): 121-127.

Zhang Yi-hui, Wang Wen-qing, Chi Minjie, Lin Peng. Development of viviparous hypocotyls of Bruguiera gymnorrhiza[J]. Haiyang Xuebao, 2006, 28(2): 121-127.

Citation:

Zhang Yi-hui, Wang Wen-qing, Chi Minjie, Lin Peng. Development of viviparous hypocotyls of Bruguiera gymnorrhiza[J]. Haiyang Xuebao, 2006, 28(2): 121-127.

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Development of viviparous hypocotyls of Bruguiera gymnorrhiza

School of Life Sciences, Xiamen University, Xiamen 361005, China;Research Center for Wetlands and Ecological Engineering, Xiamen University, Xiamen 361005, China

Received Date: 2005-03-03
Rev Recd Date: 2005-07-19

Abstract

Abstract

Hy pocotyls of Bruguiera gymnorrhiza were collected at various stages of development while still on the parent plant.Length,density,fresh weight,dry weight,water content,osmotic potential,ions concentrations and contents (Ca²⁺,Mg²⁺,Na⁺,K⁺,Cl^-) were determined.The result showed that the hypocotyls of B.gymnorrhiza undergoed some growth before becoming detached from the parent plant.They accumulated large amounts organic nutriments and ions during the development.The growth of hypocotyls could divided into 3 stages according to the changes of each physiology characteristics:The first 45 d was the fruit stage.The following 60 d were a period of highest activity after the hypocotylemerged through the fruit wall.In the final 60 d before detachment,the seedlings came into being.The osmotic potential of mature hypocotyls B.gymnorrhiza was negative than that of the solution on whichtheir parent plant vegetated,while the ions concentrations were approaching to those of the solution on which their parent plant vegetating.Thus help the seedlings survive better in the flooding and saline conditions.The density of mature hypocotyls of B.gymnorrhiza were lower than seawater,thus the hypocotyls can float and be dispersed by tide.
- Bruguiera gymnorrhiza,
- hypocotyl,
- development,
- mangroves

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References(26)

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