Acclimation responses of macaw palm seedlings to contrasting light environments

Show simple item record Dias, Adriel N. Siqueira-Silva, Advanio I. Souza, João P. Kuki, Kacilda N. Pereira, Eduardo G. 2019-05-08T11:35:10Z 2019-05-08T11:35:10Z 2018
dc.identifier.issn 20452322
dc.description.abstract The photosynthetic adjustments of macaw palm (Acrocomia aculeata) were evaluated in 30-day- old seedlings exposed to high and low light environments, and sudden transference from low to high light and comparisons were made with the hardening protocol used in nurseries. Furthermore, we evaluated the responses to long-term exposure (265 days) to high and low light environments. Macaw palm seedlings exhibited an efficient mechanism that maximized light capture under scarce conditions, and dissipated excess energy to avoid damaging to the photosystem II under high light. The seedlings showed low saturation irradiance but no photoinhibition when exposed to excess light. When grown under low light intensities, seedlings presented higher photochemical efficiency and minimized the respiratory costs with positive carbon balance at lower irradiance than hardened seedlings did. The hardening procedure did not appear to be an advantageous method during seedling production. Long-term exposure to either low or high light did not cause significant leaf anatomical adjustments. However, the low light seedlings showed higher leaf area and chlorophyll content than those exposed to higher light intensity did, which enabled shaded seedlings to maximize the captured light. Furthermore, the high non-photochemical dissipation allowed rapid acclimation to excessive light exposure. These responses allow macaw palm cultivation and establishment in very different light environments. en
dc.format pdf pt-BR
dc.language.iso eng pt-BR
dc.publisher Scientific Reports pt-BR
dc.relation.ispartofseries Volume 08, Article 15300, Pages 01- 12, 2018 pt-BR
dc.rights Open Access pt-BR
dc.subject Acclimation responses pt-BR
dc.subject Palm seedlings pt-BR
dc.title Acclimation responses of macaw palm seedlings to contrasting light environments en
dc.type Artigo pt-BR

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  • Artigos [59]
    Artigos Técnico-científicos do Instituto de Ciências Agrárias

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