Plant Vascular Architecture and Within-Plant Spatial Patterns in Resource Quality Following Herbivory
Plant Vascular Architecture and Within-Plant Spatial Patterns in Resource Quality Following Herbivory
复制标题
食草后植物维管束结构和植物内资源质量的空间模式
DOI：
10.1023/b:joec.0000018627.26420.e0
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发表时间：
2004
影响因子：
2.3
通讯作者：
J. Thaler
中科院分区：
文献类型：
--
作者：
D. Viswanathan;J. Thaler
在这项研究中，我们使用植物维管结构作为一个框架，从它来预测诱导的变化资源质量forLema trilina饲养的寄主植物Solanum dulcamara在低和高水平的草食动物。本文利用插入第一片真叶叶柄和茎切片的毛细管中染料分配的系统模式来确定不同叶位之间的维管连通程度。诱导两种防御蛋白--蛋白酶抑制剂（PI）和多酚氧化酶（PPO）活性的变化，以及幼虫L。在第一片叶被成虫损伤或未被成虫损伤的植物上的弱或强连接的叶中测量三线性性能。三线虫在高水平的植食性，幼虫的性能下降的第六叶，其中有强大的血管连接到第一叶，但增加的第五叶，其中有弱的血管连接到第一叶。PPO活性在第5叶和第6叶均升高，而PI活性在第5叶降低，但在第6叶保持不变。在低水平的植食性，幼虫的性能下降，观察到在第六叶，但没有发生变化，在弱连接的第五叶。因此，植物维管结构清楚地预测植物内的资源质量变化后，只有少量的草食动物的损害。
In this study, we used plant vascular architecture as a framework from which to predict induced changes in resource quality forLema trilineafeeding on the host plantSolanum dulcamaraat both low and high levels of herbivory. The systemic patterns of allocation of dye from a capillary tube inserted onto the petiole of the first true leaf and sections of the stem were used toEstablish theDegree of vascular connectivity among different leaf positions. Induced changes in the activity of twoDefensive proteins, proteinase inhibitor (PI) and polyphenol oxidase (PPO), as well as larvalL. trilineaperformance, were measured in weakly or strongly connected leaves on plants with the first leaf damaged or undamaged by adultL. trilinea. At high levels of herbivory, larval performanceDecreased on the sixth leaf, which has strong vascular connections to the first leaf, yet increased on the fifth leaf, which has weak vascular connections to the first leaf. PPO activity increased in both the fifth and sixth leaf, while PI activityDecreased in the fifth leaf although remaining unchanged in the sixth leaf. At low levels of herbivory, aDecrease in larval performance was observed in the sixth leaf, but no change occurred in the weakly connected fifth leaf. Hence, plant vascular architecture clearly predicted within-plant changes in resource quality following only small amounts of herbivore damage.