Herbivory pattern and induced responses to simulated herbivory inQuercus mongolica var.grosseserrata
Herbivory pattern and induced responses to simulated herbivory inQuercus mongolica var.grosseserrata
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蒙古栎的食草模式和对模拟食草的诱导反应
DOI：
10.1007/bf02347785
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发表时间：
1996
影响因子：
2
通讯作者：
G. Kudo
中科院分区：
文献类型：
--
作者：
G. Kudo
研究了蒙古栎叶性状的季节变化和取食格局，并进行了模拟取食试验。叶Q。蒙古种在春季同时出现，大部分保留到秋季。氮素浓度在叶片初出时最高，随叶龄迅速下降。叶面积质量（LMA）随叶龄的增加而增加。植食动物的攻击集中在萌芽后的前20天，这与此时叶片对植食动物的高营养价值相对应。模拟草食动物实验表明，LMA增加与人工叶片损伤，这表明叶片韧性的增加，氮浓度下降后，在本赛季与完整的叶片相比。结果表明，人工叶片损伤后，草食动物的攻击随着初始叶片损伤的增加而减少。然而，叶片寿命不受初始叶片损伤。这些反应被认为是一种策略，以分散叶片之间的植食性损害。
Seasonal changes in leaf traits and the herbivory pattern ofQuercus mongolicavar.grosseserratawere studied, and simulated herbivory experiments were carried out in order to evaluate leaf trait responses. Leaves ofQ. mongolicaemerged simultaneously in spring and most were retained until autumn. Nitrogen concentration was highest when leaves first emerged and decreased rapidly with leaf age. Leaf mass per area (LMA) increased with leaf age. Herbivore attack was concentrated in the first 20 days after bud-break, which corresponded to the high nutritional value of the leaves for herbivores at this time. Simulated herbivory experiments indicated that LMA increased with artificial leaf damage, suggesting an increase in leaf toughness, and that nitrogen concentration decreased later in the season in comparison with intact leaves. As a result, herbivore attack following artificial leaf damage decreased with increasing initial leaf damage. However, leaf longevity was not affected by initial leaf damage. These responses were considered to be a strategy to disperse herbivory damage among leaves.