The effect of successive years of defoliation by the larch sawfly (Pristiphora erichsonii (Hartig)) on the foliage properties of the Japanese larch (Larix kaempferi (Lamb.) Carr.), with particular reference to the CN balance hypothesis
The effect of successive years of defoliation by the larch sawfly (Pristiphora erichsonii (Hartig)) on the foliage properties of the Japanese larch (Larix kaempferi (Lamb.) Carr.), with particular reference to the CN balance hypothesis
复制标题
落叶松锯蝇 (Pristiphora erichsonii (Hartig)) 连续多年的落叶对日本落叶松 (Larix kaempferi (Lamb.) Carr.) 叶子特性的影响，特别是 CN 平衡假说
DOI：
10.1007/s10310-014-0442-5
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发表时间：
2015
影响因子：
1.5
通讯作者：
N. Kamata
中科院分区：
文献类型：
--
作者：
P.Pinkantayong;M. Kubo;T. Terada;M. Fujii;S. Kamoda;K. Muramoto;N. Kamata
碳/养分平衡假说（CNBH）试图解释植物性状诱导变化的机制。从CNBH的角度研究了日本落叶松对落叶松叶蜂（Pristiphora erichsonii）落叶的反应。本研究在日本北海道中部的7个日本落叶松人工林中进行。落叶强度由2009年至2012年拍摄的冠层照片确定。从2010年到2012年，测定了树叶的化学和物理性质。2009年在两个地点发现了严重的昆虫落叶，2010年和2011年在所有7个地点发现了严重的昆虫落叶。叶片氮的减少和酚类物质，单宁，CN比的增加，发现在严重落叶后的几年，并显着影响2009年落叶强度。2010年和2011年落叶的影响较弱。这些结果表明，过去的落叶历史加性地影响叶片的性质，在2年后的昆虫落叶。除了2009年落叶的影响，现场的酚类物质，糖，和CN的比例的影响。相对于其他地点，2009年发现严重落叶的两个地点的氯化萘比率都很高。酚类化合物和糖并不随着CN比例线性增加，这表明限制影响了它们的合成。这些结果表明，L.在氮限制条件下，山奈氏特性被部分上调，但二级化合物合成很可能受到除氮限制以外的外部位点依赖性因素的影响。
The carbon/nutrient balance hypothesis (CNBH) attempts to explain the mechanism of induced changes in plant properties. The responses of the Japanese larch (Larix kaempferi) to defoliation by the larch sawfly (Pristiphora erichsonii) were examined from the perspective of the CNBH. This study was conducted in seven Japanese larch plantations in central Hokkaido, Japan. The defoliation intensity was determined from canopy photos taken from 2009 to 2012. The chemical and physical properties of the foliage were determined from 2010 to 2012. Severe insect defoliation was found at two sites in 2009 and at all seven sites in 2010 and 2011. A decrease in foliar nitrogen and increases in phenolics, tannins, and the CN ratio were found in the years following severe defoliation and were significantly influenced by the 2009 defoliation intensity. The influence of defoliation in 2010 and 2011 was weaker. These results indicated that the past defoliation history additively affected the foliage properties in the 2 years following insect defoliation. In addition to the 2009 defoliation effects, site effects were found on phenolics, sugars, and the CN ratio. Relative to the other sites, the CN ratio was high at both sites where severe defoliation was found in 2009. Phenolics and sugars did not increase linearly with the CN ratio, indicating that limitations affected their synthesis. These results suggest that the induced changes inL. kaempferiproperties are partially up-regulated under nitrogen limitation, but that secondary compound synthesis was, most likely, influenced by external site-dependent factors other than nitrogen limitation.