Previous light acclimation affects growth responses of Cariniana legalis seedlings after transferring to the forest understory

IF 3.7 2区农林科学 Q1 FORESTRY

Forest Ecology and Management Pub Date : 2025-09-15 DOI:10.1016/j.foreco.2025.123171

Marayana Prado Pinheiro , Catriane Sousa-Santos , Amanda Freitas Cerqueira , Ândrea Carla Dalmolin , Ana Cristina Schilling , Martielly Santana dos Santos , Marcelo Schramm Mielke

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引用次数: 0

Abstract

Information on the effects of previous light acclimation of tree seedlings transferred to the forest understory is important for the success of enrichment plantations. Cariniana legalis (Mart.) Kuntze, a long-lived tropical tree, is ecologically significant in the Brazilian Atlantic Rainforest. This study aimed to assess how light acclimation influences the physiological performance and growth of C. legalis seedlings after being transferred to the forest understory. We hypothesized that (1) growth rates after transference to the forest understory depend on prior light acclimation in the nursery and (2) seedlings acclimated to higher light levels would require more light after transfer, showing a higher whole-plant light compensation point. Seedlings were acclimated to different daily light integral levels in shade houses and then moved to a gradient of light environments in the forest understory. The relative growth rate, net assimilation rate, and leaf area ratio were measured at the end of the acclimation period and about 40 days after the transfer. In addition, the maximum quantum efficiency of photosystem II (Fv/Fm ratio) was measured as an indicator of environmental stress at the end of the acclimation period and 34 days after the transfer. Light acclimation treatments significantly impacted relative growth rates and net assimilation rates. The Fv/Fm ratio significantly differed among light acclimation treatments in the nursery, but not after transference to the forest understory. The whole plant light compensation point did not differ among light acclimation treatments but was about seven times higher than values previously reported for the same species under nursery conditions. Based on our results, the seedlings of C. legalis acclimated to the values of daily light integral between 3.6 and 8.4 mol photons m⁻² day⁻¹, or 10–23 % of full sunlight, had the best performances in terms of growth uniformity after transfer to a tropical rainforest understory.

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先前的光驯化影响了法轮麻幼苗转移到林下后的生长响应

树木幼苗转移到林下的前期光驯化效果的信息对于富集人工林的成功至关重要。麻麻（麻麻）昆策是一种长寿的热带树木，在巴西大西洋雨林中具有重要的生态意义。本研究旨在探讨光驯化对豆豆幼苗移栽林下后生理性能和生长的影响。我们假设：(1)迁移到林下后的生长速率取决于苗圃先前的光驯化；(2)迁移后适应更高光水平的幼苗需要更多的光，表现出更高的全株光补偿点。幼苗在遮荫房屋中适应不同的日光照水平，然后转移到森林林下的光照环境梯度中。在驯化期结束后和移栽后约40 d测定相对生长率、净同化率和叶面积比。此外，在驯化期结束和转移后34 d，测定了光系统II的最大量子效率（Fv/Fm比值）作为环境胁迫的指标。光驯化处理显著影响了相对生长率和净同化率。苗圃内不同光驯化处理间Fv/Fm差异显著，转移至林下后差异不显著。全株光补偿点在不同的光驯化处理中没有差异，但比苗圃条件下的相同品种高约7倍。结果表明，日光照积分在3.6 ~ 8.4 mol光子m−2 day−1之间，占总日照量的10-23 %，迁移到热带雨林林下后，豆豆幼苗的生长均匀性最好。

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来源期刊

Forest Ecology and Management 农林科学-林学

CiteScore

7.50

自引率

10.80%

发文量

665

审稿时长

39 days

期刊介绍： Forest Ecology and Management publishes scientific articles linking forest ecology with forest management, focusing on the application of biological, ecological and social knowledge to the management and conservation of plantations and natural forests. The scope of the journal includes all forest ecosystems of the world. A peer-review process ensures the quality and international interest of the manuscripts accepted for publication. The journal encourages communication between scientists in disparate fields who share a common interest in ecology and forest management, bridging the gap between research workers and forest managers. We encourage submission of papers that will have the strongest interest and value to the Journal''s international readership. Some key features of papers with strong interest include: 1. Clear connections between the ecology and management of forests; 2. Novel ideas or approaches to important challenges in forest ecology and management; 3. Studies that address a population of interest beyond the scale of single research sites, Three key points in the design of forest experiments, Forest Ecology and Management 255 (2008) 2022-2023); 4. Review Articles on timely, important topics. Authors are welcome to contact one of the editors to discuss the suitability of a potential review manuscript. The Journal encourages proposals for special issues examining important areas of forest ecology and management. Potential guest editors should contact any of the Editors to begin discussions about topics, potential papers, and other details.