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Effects of shading on growth and photosynthetic metabolism in Dipteryx alata Vogel seedlings under flooding
Brazilian Journal of Botany ( IF 1.6 ) Pub Date : 2021-08-11 , DOI: 10.1007/s40415-021-00735-7
Jéssica Aline Linné 1 , Maílson Vieria Jesus 1 , Lucas Coutinho Reis 1 , Daiane Mugnol Dresch 1 , Silvana de Paula Quintão Scalon 1 , Cleberton Correia Santos 1 , Vânia Tomazelli de Lima 2
Affiliation  

Currently, environmental climate changes are constant and severe, causing physiological, biochemical and morphological changes in plants, which may induce adaptation and acclimatization to abiotic stresses. Greater knowledge about plant ecophysiology, such as the effects of light/shading and water condition may help the production and implantation of seedlings in projects for the recovery of degraded areas. Therefore, the aim of this study was to evaluate the photosynthetic metabolism, growth and quality of Dipteryx alata Vogel seedlings under three shading levels: 0%—full sun, 30% and 70% with two water regimes: the control—75% of the water retention capacity in the substrate—and the flooding of seedlings for 60 days and 100 days of post-flooding, which this last period was called recovery phase. We verified that flooding was harmful to gas exchange, potential quantum efficiency of photosystem II, plant height, expansion of the specific leaf area and quality of seedlings. However, the species recovered most of characteristics evaluated at 100 days of post-flooding with the end of stress showing the best results under 30% shading. The combination of metabolic adjustments of this species indicates resilience and plasticity then it expresses tolerance in conditions of seasonal flooding.



中文翻译:

遮荫对淹水条件下龙舌兰幼苗生长和光合代谢的影响

目前,环境气候变化持续而剧烈,引起植物生理、生化和形态变化,可能导致对非生物胁迫的适应和驯化。更多关于植物生态生理学的知识,例如光/阴影和水条件的影响,可能有助于在退化地区恢复项目中生产和种植幼苗。因此,本研究的目的是评估双翅双翅目的光合代谢、生长和品质。三种遮荫水平下的 Vogel 幼苗:0% — 全日照,30% 和 70% 两种水分状况:对照 — 基质中保水能力的 75% — 以及浸水 60 天和 100 天后的幼苗- 洪水,这最后一个时期被称为恢复阶段。我们证实洪水对气体交换、光系统 II 的潜在量子效率、植物高度、比叶面积的扩大和幼苗质量有害。然而,该物种恢复了洪水后 100 天评估的大部分特征,压力结束时在 30% 遮荫下显示最佳结果。该物种代谢调整的组合表明了弹性和可塑性,然后它表达了对季节性洪水条件的耐受性。

更新日期:2021-08-11
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