Water content, fibres, and herbivory in leaves of two distinct and adjacent tree communities of the Brazilian Atlantic Forest

Nascimento, Aline Alves do; Menezes, Luis Fernando Tavares de; Nascimento, Marcelo Trindade

doi:10.1590/2236-8906-43/2016

Cited by 3 publications

(1 citation statement)

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“…Stimulation of phenolic compounds, such as lignin, by mycorrhization also interferes negatively with nitrogen accumulation in leaves (Silveira and Higashi 2003). Low nitrogen content has been related to decreased foraging by lepidopteran caterpillars (Panizzi and Parra 2009), which are known to select and consume leaves with more than 7% N (Marquis 2012;Do Nascimento et al 2017).…”

Section: Discussionmentioning

confidence: 99%

The influence of mycorrhization on the growth of Zea mays L. and the sclerification of foliar tissues susceptible to chewing insect attacks

2020

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The interrelationships between arbuscular mycorrhizal fungi (AMF) and plants have been the subject of numerous studies; however, whether these mutualistic associations are capable of producing structural defenses in plants for pest control remains to be determined. The present study evaluated the influence of AMF on the sclerification of foliar tissues of corn and related it to insect attack. Corn plants were grown in 5.5-L pots containing soil/sand (sterile, fertilized, pH corrected) in a greenhouse. Mycorrhized plants received propagules of native AMF; non-mycorrhized plants received soil filtrate of AMF-free soil. Some of the plants of both treatments were collected at 40 days post-emergence, while others were collected at 50 days and 60 days. Height and dry mass of the aerial part and dry mass of radicular part were evaluated. The median region of leaves of the fourth (basal) and seventh (cartridge) leaf nodes was transversally sectioned, and the sections stained, mounted in semi-permanent medium and analyzed under a microscope to measure variables related to tissue organization and sclerification. Mycorrhized plants had greater height and aerial-part dry mass. Mycorrhization influenced nine of the 15 anatomical variables analyzed with increased lignified tissue in at least one of the growth stages. It can be concluded that colonization of corn roots by AMF promotes sclerification of leaf tissues and, thus, may interfere indirectly with the plant-pest relationship by altering the quality of phytomass available for insects.

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Section: Discussionmentioning

confidence: 99%