Abstract Melocactus sergipensis, Melocactus violaceus, and Melocactus zehntneri are under threat of extinction. Their wild populations are exploited by predatory extraction, because the potential as ornamental plants. Thus, alternatives for sustainable production and conservation are needed. The present study investigated the influence of artificial (growth room) and natural light (greenhouse) on the in vitro germination and growth of these three Melocactus species, and their effects during the acclimatization. Plants were established in vitro and cultivated for 56 days under two lighting conditions (absence/ presence of light) and two light intensity (artificial light: 40 µmol m-2 s-1/ natural light: 160 µmol m-2 s-1). The samples were acclimatized in a greenhouse. The data were analyzed using an Analysis of Variance and compared by Tukey's test (P

中文翻译：

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不同的栽培环境是否会影响三种受威胁的巴西仙人掌物种的萌发和初始生长？

摘要 Melocactus sergipensis、Melocactus violaceus 和Melocactus zehntneri 正面临灭绝的威胁。它们的野生种群被掠夺性提取利用，因为它们具有作为观赏植物的潜力。因此，需要可持续生产和保护的替代方案。本研究调查了人工（生长室）和自然光（温室）对这三种 Melocactus 物种的体外萌发和生长的影响，以及它们在驯化过程中的影响。植物在体外建立并在两种光照条件（无光/有光）和两种光强度（人工光：40 µmol m-2 s-1/自然光：160 µmol m-2 s-1）下培养 56 天. 样品在温室中驯化。使用方差分析对数据进行分析，并通过 Tukey' 进行比较