Seasonal and diurnal variations in leaf aroma volatiles of Cinnamomum tamala (Buch.-Ham.) T. Nees & Eberm as evidenced from metabolite profiling, histochemical and ultrastructural analyses.

IF 3.5 2区农林科学 Q1 FORESTRY

Tree physiology Pub Date : 2024-11-01 DOI:10.1093/treephys/tpae138

Sulagna Saha, Adinpunya Mitra

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Abstract

Though the leaves of Cinnamomum tamala is extensively employed in culinary applications due to its rich aroma and therapeutic properties, the produce exhibits variability in composition and contents of leaf essential oil due to fluctuations in climatic conditions and harvesting time. This work evaluated the impact of seasonal and diurnal variations on the composition and contents of aroma volatiles in the mature leaves of C. tamala. In summer, the profile of aroma volatile was dominated by phenylpropanoids (112.96 ± 24.11 μg/g of freeze-dried leaf tissue) while in winter monoterpenes (58.45 ± 8.194 μg/g of freeze-dried leaf tissue) acquired the dominance. The variability in the contents of primary metabolites was shown to be influenced by the harvesting season and time. Organic acids and sugars showed highest accumulation in leaves harvested during summer evening and winter morning, respectively. Histochemical study showed the presence of lipids and terpenes in the secretory cells as revealed through sudan III and NaDi staining. The ontogeny of secretory oil cells that accumulate essential oil were elucidated through ultrastructural study.

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代谢物分析、组织化学和超微结构分析显示的 Cinnamomum tamala (Buch.-Ham.) T. Nees & Eberm 叶片香气挥发物的季节和昼夜变化。

尽管肉桂叶因其丰富的香气和治疗特性被广泛应用于烹饪，但由于气候条件和采摘时间的波动，其叶片精油的成分和含量表现出差异性。这项研究评估了季节和昼夜变化对塔马拉香叶中香气挥发物成分和含量的影响。在夏季，芳香挥发物以苯丙酸类化合物（112.96 ± 24.11 μg/克冻干叶片组织）为主，而在冬季，单萜烯类化合物（58.45 ± 8.194 μg/克冻干叶片组织）占据主导地位。初级代谢物含量的变化受收获季节和时间的影响。有机酸和糖分别在夏季傍晚和冬季早晨收获的叶片中积累最多。组织化学研究表明，分泌细胞中存在脂质和萜烯，这一点可以通过茚三酮和 NaDi 染色来揭示。通过超微结构研究，阐明了积累精油的分泌油细胞的发育过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tree physiology 农林科学-林学

CiteScore

7.10

自引率

7.50%

发文量

133

审稿时长

1 months

期刊介绍： Tree Physiology promotes research in a framework of hierarchically organized systems, measuring insight by the ability to link adjacent layers: thus, investigated tree physiology phenomenon should seek mechanistic explanation in finer-scale phenomena as well as seek significance in larger scale phenomena (Passioura 1979). A phenomenon not linked downscale is merely descriptive; an observation not linked upscale, might be trivial. Physiologists often refer qualitatively to processes at finer or coarser scale than the scale of their observation, and studies formally directed at three, or even two adjacent scales are rare. To emphasize the importance of relating mechanisms to coarser scale function, Tree Physiology will highlight papers doing so particularly well as feature papers.