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首页> 外文期刊>Oikos: A Journal of Ecology >Tolerance to apical and foliar damage: costs and mechanisms in Raphanus raphanistrum
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Tolerance to apical and foliar damage: costs and mechanisms in Raphanus raphanistrum

机译：根尖和叶面损伤的耐受性：Raphanus raphanistrum的成本和机制

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摘要

To study mechanisms underlying plant tolerance to herbivore damage, we used apical and foliar damage as experimental treatments to study whether there are similar tolerance mechanisms to different types of damage. We also studied whether tolerance to different types of damage are associated, and whether there is a cost involved in plant tolerance to different types of herbivore damage. Our greenhouse experiment involved 480 plants from 30 full-sib families of an annual weed Raphanus raphanistrum, wild radish, which were subjected to control and two different simulated herbivore damage treatments, apex removal and foliar damage of 30% of leaf area. Apical damage significantly decreased seed production, whereas foliar damage had no effect. There was a significant genetic variation for tolerance to foliar, but not apical damage. No costs were observed in terms of negative correlation between tolerance to either damage type and fitness of undamaged plants. Tolerances to apical and foliar damage were not significantly correlated with each other. We observed a larger number of significant associations between tolerance and reproductive traits than between tolerance and vegetative traits. Plant height and leaf size of damaged plants interacted in their association to tolerance to foliar damage. Inflorescence number and pollen quantity per flower of damaged plants were positively associated with tolerance to apical damage. In late-flowering genotypes, petal size of undamaged plants and pollen quantity of damaged plants were positively associated with tolerance to foliar damage. In summary, traits involved in floral display and male fitness were associated with plant tolerance to herbivore damage.
机译：为了研究植物对草食动物危害的耐受机制，我们使用根尖和叶面伤害作为实验处理方法来研究对不同类型的危害是否存在相似的耐受机制。我们还研究了对不同类型损害的耐受性是否相关，以及植物对不同类型食草动物损害的耐受性是否涉及成本。我们的温室实验涉及来自一年生杂草Raphanus raphanistrum的30个同胞家族的480种植物，分别进行了控制和两种不同的模拟食草动物损害处理，根尖切除和叶面损害（占叶面积的30％）。根尖损害显着降低了种子产量，而叶面损害没有影响。对叶的耐受性存在显着的遗传变异，但对根尖的损害没有。在损害类型的耐受性和未受损植物的适应性之间的负相关性方面，未观察到成本。根尖和叶损伤的耐受性之间没有显着相关。我们观察到耐受性与生殖性状之间的显着关联要多于耐受性与营养性状之间的显着关联。受损植物的株高和叶片大小在对叶面损害的耐受性上相互影响。受损植物的花序数和每花粉的花粉量与根尖耐受性呈正相关。在晚花基因型中，未受损植物的花瓣大小和受损植物的花粉数量与叶面耐性呈正相关。总而言之，参与花卉展示和雄性适应的性状与植物对草食动物损害的耐受性有关。

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