Clonal Saplings of Trembling Aspen Do Not Coordinate Defense Induction
Clonal Saplings of Trembling Aspen Do Not Coordinate Defense Induction
复制标题
颤抖白杨的克隆树苗不协调防御诱导
DOI：
10.1007/s10886-018-1006-5
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发表时间：
2018
影响因子：
2.3
通讯作者：
Lindroth, Richard L.
中科院分区：
文献类型：
--
作者：
Cope, Olivia L.;Lindroth, Richard L.
植物对昆虫摄食的化学防御反应可能局限于受损部位，也可能通过整个植物的信号转导系统表达。这种系统诱导过程已经在单茎植物中得到了广泛的研究，但在具有维管连接的多个分节的无性系植物中却很少研究。对于颤杨（Populus tremuloidesMichx）等无性系树种，由于无性系在空间上分布广泛且易受爆发食草动物的影响，因此在无性系中整合诱导防御可能具有适应性。我们使用三种基因型的同源白杨树苗对，以确定防御诱导信号是否在克隆中传递。每对中的一个分株受到伤害处理（由异毒蛾喂食，然后是机械损伤），随后测量两个分株叶片防御化学的变化。对损伤的反应因防御类型而异：受损品系中缩合单宁（CTs）增加，而未受损品系中没有，而水杨酸类酚苷（SPGs）在所有品系中均未诱导。基因型在它们的ct水平上有所不同，但在它们的SPGs水平上没有变化，并且对损伤治疗的反应相似。这些结果表明，即使血管和挥发性信息都可用，幼小的杨树也不会根据来自其他品种的信号或代谢物诱导防御。因此，与其他无性系植物物种不同，白杨似乎不协调克隆内的防御诱导。杨树缺乏协调的早期诱导可能与ct在耐受性中的功能有关，而不是抗性。
Induction of plant chemical defenses in response to insect feeding may be localized to the site of damage or expressed systemically, mediated by signal transduction throughout the plant. Such systemic induction processes have been widely investigated in plants with single stems, but rarely in clonal plants comprised of multiple ramets with vascular connections. For a clonal tree species such as trembling aspen (Populus tremuloidesMichx), integration of induced defense within clones could be adaptive, as clones are spatially extensive and susceptible to outbreak herbivores. We used pairs of aspen saplings with shared roots, replicated from three genotypes, to determine whether defense-induction signals are communicated within clones. One ramet in each pair was subjected to a damage treatment (feeding byLymantria dispar, followed by mechanical damage), and subsequent changes in leaf defensive chemistry were measured in both ramets. Responses to damage varied by defense type: condensed tannins (CTs) increased in damaged ramets but not in connected undamaged ramets, whereas salicinoid phenolic glycosides (SPGs) were not induced in any ramets. Genotypes varied in their levels of CTs, but not in their levels of SPGs, and responded similarly to damage treatment. These results suggest that, even with both vascular and volatile information available, young aspen ramets do not induce defenses based on signals or metabolites from other ramets. Thus, unlike other clonal plant species, aspen do not appear to coordinate defense induction within clones. Lack of coordinated early induction in aspen may be related to the function of CTs in tolerance, rather than resistance.
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春季冻害和遗传变异会改变树木的生长、化学和昆虫相互作用。
DOI：
10.1111/pce.13042
发表时间：
2017
期刊：
Plant, cell & environment
影响因子：
--
作者：
Kennedy F. Rubert‐Nason;J. Couture;Elizabeth A Gryzmala;P. Townsend;R. Lindroth
通讯作者：
R. Lindroth
影响因子：
2.7
作者：
Cole, Christopher T.;Stevens, Michael T.;Lindroth, Richard L.
通讯作者：
Lindroth, Richard L.
影响因子：
9.4
作者：
Madritch, Michael D.;Lindroth, Richard L.
通讯作者：
Lindroth, Richard L.
草食动物、血管通路和全身诱导：事实和文物
影响因子：
2.3
作者：
C. Orians
通讯作者：
C. Orians
影响因子：
2.3
作者：
Li, Tao;Blande, James D.
通讯作者：
Blande, James D.