Pandey Veena, Bhatt I D, Nandi Shyamal K
G. B. Pant National Institute of Himalayan Environment (GBP-NIHE), Kosi-Katarmal, Almora, Uttarakhand 263 643 India.
Physiol Mol Biol Plants. 2021 Feb;27(2):327-340. doi: 10.1007/s12298-021-00944-0. Epub 2021 Feb 18.
Jones an important medicinal herb of the Himalayan region, is an essential source of many therapeutic compounds and is traded/consumed in very high volume. The hypothesis of this study was that different seasons and light conditions may affect the content of medicinally valuable components with changes in the morpho-physiological attributes of the plant. Growing plants under suitable light conditions and harvesting of appropriate plant parts in optimum season is crucial for harnessing the full potential of the crop. Thus, the study was carried out to determine the seasonal response of plants (genetically identical plants of same age) in terms of growth and phytochemical content under two different light conditions (full sunlight and 50% shade). During all seasons, growth parameters (plant height, leaf number, leaf area, relative water content, plant biomass) and the principle bioactive compounds (valerenic acid) were higher under shade conditions, while total flavonoids, tannins, phenolic compounds and antioxidant activities were higher under full sunlight conditions. HPLC analysis revealed that valerenic acid and most of the phenolic content were higher during summer season, especially in leaf part of the plant. The study suggested harvesting of plants (especially leaf), during summer season to harness high quality raw material and to prevent loss of belowground parts. This strategy can be adopted by farmers for large scale cultivation of species.
The online version of this article contains supplementary material available at 10.1007/s12298-021-00944-0.
Jones是喜马拉雅地区一种重要的药用植物，是许多治疗性化合物的重要来源，且交易/消费量极大。本研究的假设是，不同季节和光照条件可能会随着植物形态生理特性的变化而影响具有药用价值成分的含量。在适宜的光照条件下种植植物，并在最佳季节收获合适的植物部位，对于充分发挥作物的潜力至关重要。因此，本研究旨在确定在两种不同光照条件（全日照和50%遮荫）下，植物（相同年龄的基因相同的植物）在生长和植物化学成分方面的季节性反应。在所有季节中，遮荫条件下的生长参数（株高、叶片数、叶面积、相对含水量、植物生物量）和主要生物活性化合物（缬草烯酸）较高，而总黄酮、单宁、酚类化合物和抗氧化活性在全日照条件下较高。高效液相色谱分析表明，缬草烯酸和大部分酚类含量在夏季较高，尤其是在植物的叶片部分。该研究建议在夏季收获植物（尤其是叶片），以获取高质量的原材料并防止地下部分损失。农民在大规模种植该物种时可采用这一策略。
本文的在线版本包含可在10.1007/s12298-021-00944-0获取的补充材料。
