Response to Various Water Regimes of the Physiological Aspects, Nutritional Water Productivity, and Phytochemical Composition of Bush Tea (Athrixia phylicoides DC.) Grown under a Protected Environment

IF 3.1 3区农林科学 Q1 HORTICULTURE

Horticulturae Pub Date : 2024-06-04 DOI:10.3390/horticulturae10060590

Muneiwa Rumani, T. Mabhaudhi, Maanea L. Ramphinwa, Anza-Tshilidzi Ramabulana, N. Madala, L. S. Magwaza, F. Mudau

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引用次数: 0

Abstract

The influence of water regimes on plants is crucial for integrating bush tea (Athrixia phylicoides DC.) into strategies in Sub-Saharan Africa to tackle food and nutritional insecurity by considering physiological aspects, nutritional yield, nutritional water productivity, and metabolite composition. The objective of the study was to determine the physiological aspects, including leaf gas exchange and chlorophyll fluorescence, nutritional yield, nutritional water productivity, and metabolite composition of bush tea under varying water regimes. The tunnel experiment was laid out in a randomized complete block design (RCBD) with treatments consisting of three water regimes: 100% of crop water requirement (ETa), 30% of ETa, and a control (no irrigation), all replicated three times. The morphological aspects were recorded on a weekly basis. However, yield, nutrient content, nutritional water productivity (NWP), and phytochemical composition were determined at harvest. The phytochemical analysis by liquid chromatography mass spectrometry (LC-MS), coupled with visualization of the detected chemical spaces through molecular networking, indicated Athrixia phylicoides DC. to be rich in various bioactive compound derivatives, including methyl chlorogenate, flavonoids, tartaric acid, caffeoylquinic acid, and glutinane. The results showed that 30% ETa enhanced plant growth, nutrient content, and nutritional water productivity compared to other water treatments. Nevertheless, 100% ETa yielded more (95.62 kg ha−1) than 30% ETa (60.61 kg ha−1) and control (12.12 kg ha−1). The accumulation of chlorogenic acids was higher under 30% ETa compared to 100% ETa and control. Therefore, this study is the first to determine the accumulation of various bioactive compounds in bush tea leaf extracts under varying water regimes. This confirms that in areas with low water availability, bush tea is well adapted for production without limiting nutrients.

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在受保护环境下种植的丛生茶（Athrixia phylicoides DC.）的生理方面、营养水生产力和植物化学成分对不同水制度的反应

通过考虑生理方面、营养产量、营养水分生产率和代谢物组成，将灌木茶（Athrixia phylicoides DC.）纳入撒哈拉以南非洲解决粮食和营养不安全问题的战略中，水制度对植物的影响至关重要。这项研究的目的是确定灌木茶在不同水分制度下的生理特性，包括叶片气体交换和叶绿素荧光、营养产量、营养水分生产率和代谢物组成。隧道试验采用随机完全区组设计（RCBD），处理包括三种水分制度：100% 的作物需水量（ETa）、30% 的 ETa 和对照（不灌溉），均重复三次。形态方面的数据每周记录一次。然而，产量、养分含量、营养水分生产率（NWP）和植物化学成分则在收获时测定。利用液相色谱质谱法（LC-MS）进行植物化学分析，并通过分子网络将检测到的化学空间可视化，结果表明 Athrixia phylicoides DC.富含多种生物活性化合物衍生物，包括氯代甲酸、黄酮类、酒石酸、咖啡酰奎宁酸和谷甾醇。结果表明，与其他水处理相比，30% ETa 能提高植物生长、养分含量和营养水生产率。然而，100% ETa 的产量（95.62 千克/公顷-1）高于 30% ETa（60.61 千克/公顷-1）和对照（12.12 千克/公顷-1）。与 100% ETa 和对照相比，30% ETa 的绿原酸累积量更高。因此，本研究首次确定了灌木茶叶提取物中各种生物活性化合物在不同水分条件下的积累情况。这证实了在低水量地区，灌木茶在不限制养分的情况下也能很好地适应生产。

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

Horticulturae HORTICULTURE-

CiteScore

3.50

自引率

19.40%

发文量

998