Experimental assessment of salinity tolerance of Ceriops tagal seedlings and saplings from the Indus delta, Pakistan
Experimental assessment of salinity tolerance of Ceriops tagal seedlings and saplings from the Indus delta, Pakistan
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DOI：
10.1016/s0304-3770(01)00160-7
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发表时间：
2001-07-01
期刊：
影响因子：
1.8
通讯作者：
Khan, MA
中科院分区：
文献类型：
--
作者：
Aziz, I;Khan, MA
采用0、25、50、75和100%加氮海水分灌的砂质土壤，在印度河三角洲采得塔格尔（C. tagal）繁殖体盆栽中进行生长。幼苗试验生长6个月，幼树试验生长12个月。在50%的海水中观察到最大的生长，随着盐度的增加而下降。水关系数据表明，该物种逐渐调整其内部水势以响应外部水势的变化，即作为渗透构象响应。C. tagal也是一种非分泌物，积累了大量的钠离子和氯离子，而其他离子的可用性受到严重限制。我们的结果表明，C， tagal几乎和Avicennia marina一样耐盐，但不能忍受盐度的突然变化。因此，这个物种可能被用来恢复潮间带地区，那里有定期的淡水供应。(C) 2001 Elsevier Science B.V.版权所有
Propagules of Ceriops tagal (C. tagal) collected from the Indus delta were grown in pots containing sandy soil sub-irrigated with 0, 25, 50, 75 and 100% seawater fortified with nitrogen. Seedlings were experimentally grown for 6 months and saplings for 12 months. Maximum growth was observed in 50% seawater and declined with increasing salinity. Water relations data showed that this species progressively adjusted its internal water potential in response to change in external water potential, i.e. responded as an osmoconformer. C. tagal is also a non-secretor and accumulated a larger quantity of sodium and chloride ions while availability of other ions were severely restricted. Our result suggests that C, tagal is almost as salt tolerant as Avicennia marina but would not be able to tolerate a sudden major shift in salinity. This species could, thus, probably be used to rehabilitate inter-tidal areas, which receive a regular supply of fresh water. (C) 2001 Elsevier Science B.V. All rights reserved.