Effects of clonal integration on response to sand burial and defoliation by the dune plant Ipomoea pes-caprae (Convolvulaceae)
Effects of clonal integration on response to sand burial and defoliation by the dune plant Ipomoea pes-caprae (Convolvulaceae)
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DOI：
10.1071/bt98030
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发表时间：
2000-01-01
影响因子：
1.1
通讯作者：
Bach, CE
中科院分区：
文献类型：
--
作者：
Bach, CE
研究了热带沙丘植物Ipomoea pes-caprae L. （Roth）克隆整合对沙埋和落叶两种胁迫下生长和死亡的影响。子分株上1个梢采用砂埋和人工落叶处理，部分接穗与其他分株相连，部分不接穗。砂埋对连生和非连生分株的茎长和叶片产量均有显著促进作用。除落叶的幼芽外，其他幼芽的茎生长均受落叶影响，但仅对未埋的分株有效。落叶对连接分株其他枝条生长的负面影响也大于不连接分株。在整个分株水平上，埋藏对连接分株的茎和叶的生长均有促进作用，而对未连接分株则无促进作用。这些结果支持了一种假说，即分株间的生理整合介导了对沙埋和落叶的反应。
This study examined the importance of clonal integration on the growth and mortality of a tropical dune plant, Ipomoea pes-caprae L. (Roth), in response to two stresses: sand burial and defoliation. Sand burial and artificial defoliation treatments were applied to one shoot on daughter ramets, some of which were connected to other ramets and some of which were not connected to other ramets. Sand burial significantly enhanced both stem growth and leaf production of the buried shoots, both for connected and unconnected ramets. Defoliation decreased stem growth of shoots other than the defoliated shoot, but only for unburied ramets. Defoliation also had a greater negative effect on growth of other shoots on connected ramets than on unconnected ramets. At the level of the entire ramet, burial stimulated both stem growth and leaf production for connected ramets, but not for unconnected ramets. These results support the hypothesis that physiological integration between ramets mediates the response to both sand burial and defoliation in Ipomoea pes-caprae.