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The role of leaf cutting and fire on extrafloral nectaries and nectar production in Stryphnodendron adstringens (Fabaceae, Mimosoideae) plants
Plant Species Biology ( IF 1.1 ) Pub Date : 2022-05-05 , DOI: 10.1111/1442-1984.12373 Marina Neves Delgado 1, 2 , Helena Castanheira Morais 1 , Davi Rodrigo Rossatto 3
Plant Species Biology ( IF 1.1 ) Pub Date : 2022-05-05 , DOI: 10.1111/1442-1984.12373 Marina Neves Delgado 1, 2 , Helena Castanheira Morais 1 , Davi Rodrigo Rossatto 3
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Herbivory pressure is an important ecological aspect to determine quantitative variation in plant defenses, such as the number of extrafloral nectaries (EFNs) and their nectar amount and quality. Extrafloral nectaries can attract ants, which can be considered a type of induced plant defense. Besides, plants tend to invest more in defense when they are more vulnerable to herbivores. Therefore, we aimed to elucidate if Stryphnodendron adstringens (Fabaceae), a common Cerrado tree species, when subjected to damage (by manual leaf cutting and experimental fire) would produce a greater number of EFNs and changes its nectar quality on newly produced leaves in comparison with plants not subjected to these treatments. Leaf damage was performed artificially directly on the plant branches and at the entire plant canopy (by means of scissors or fire events). Extrafloral nectary density was higher in new leaves produced after the treatment application (artificial herbivory and fire) in comparison with plants under control treatment. The amount of nectar was also higher under treatments in comparison with control, with a significant change on nectar quality in plants subjected to the treatments of artificial herbivory. The results provided support for the hypothesis that EFNs are an inducible defensive strategy in S. adstringens, confirming the existence of phenotypic plasticity given environmental pressures.
中文翻译：
叶切和火对Stryphnodendron adstringens（豆科，含羞草科）植物花外蜜腺和花蜜生产的作用
草食压力是确定植物防御数量变化的重要生态方面，例如花外蜜腺 (EFN) 的数量及其花蜜的数量和质量。花外蜜腺可以吸引蚂蚁，这可以被认为是一种诱导植物防御。此外，当植物更容易受到食草动物的攻击时，它们往往会在防御上投入更多。因此，我们旨在阐明Stryphnodendron adstringens（豆科）是一种常见的 Cerrado 树种，与未经过这些处理的植物相比，当受到损害（通过手动切叶和实验性火灾）时，会产生更多的 EFN，并改变新产生的叶子上的花蜜质量。直接在植物枝条和整个植物冠层上人工进行叶片损坏（通过剪刀或火灾事件）。与对照处理的植物相比，处理应用（人工食草和火）后产生的新叶的花外蜜腺密度更高。与对照相比，处理下的花蜜量也更高，人工食草动物处理的植物的花蜜质量发生了显着变化。S. adstringens，在环境压力下证实了表型可塑性的存在。
更新日期：2022-05-05
中文翻译：
叶切和火对Stryphnodendron adstringens（豆科，含羞草科）植物花外蜜腺和花蜜生产的作用
草食压力是确定植物防御数量变化的重要生态方面，例如花外蜜腺 (EFN) 的数量及其花蜜的数量和质量。花外蜜腺可以吸引蚂蚁，这可以被认为是一种诱导植物防御。此外，当植物更容易受到食草动物的攻击时，它们往往会在防御上投入更多。因此，我们旨在阐明Stryphnodendron adstringens（豆科）是一种常见的 Cerrado 树种，与未经过这些处理的植物相比，当受到损害（通过手动切叶和实验性火灾）时，会产生更多的 EFN，并改变新产生的叶子上的花蜜质量。直接在植物枝条和整个植物冠层上人工进行叶片损坏（通过剪刀或火灾事件）。与对照处理的植物相比，处理应用（人工食草和火）后产生的新叶的花外蜜腺密度更高。与对照相比，处理下的花蜜量也更高，人工食草动物处理的植物的花蜜质量发生了显着变化。S. adstringens，在环境压力下证实了表型可塑性的存在。
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