Changes in Yield and Essential Oil Compositions of Dracocephalum kotschyi Boiss in Response to Azocompost, Vermicompost, Nitroxin, and Urea Under Water Deficit Stress

AbstractIntercropping of medicinal plants/legumes along with bio-fertilizer application is a relatively new sustainable practice for improving the yield and secondary metabolites production. Here, a 2-years field experiment was performed to evaluate the effects of water deficit stress and arbuscular mycorrhizal fungi (AMF) application (as bio-fertilizer) on nutrients concentration, dry matter yield, essential oil quantity and quality of thyme in intercropping with soybean. Three irrigation levels, including (i) irrigation after depletion of 20% (I20) as non-stressed, 50% (I50) as moderate water deficit and 80% (I80) available water as severe water deficit were applied as the main factor. The sub-factor was represented by different cropping patterns including thyme sole culture, replacement intercrop ratio of 50:50 and 66:34 (soybean: thyme) and the third factor was non-usage (control) and usage of AMF. According to our results, the thyme dry yield under moderate and severe water deficit stress decreased by 35 and 44% in the first year, and by 27 and 40% in the second year compared with non-stressed (I20) plants, respectively. Also, the macro- and micro-nutrients of thyme leaves increased significantly in intercropping patterns after application of AMF. The maximum essential oil percentage of thyme was achieved in 50:50 intercropping ratio treated with AMF. Under moderate and severe water deficits, the major constituents of thyme essential oil including thymol, p-cymene and γ-terpinene were increased in intercropping patterns treated with AMF. Generally, AMF application in intercropping ratio of 50:50 may be proposed to farmers as an eco-friendly approach to achieve desirable essential oil quality and quantity in thyme under water deficit stress conditions.

Download Full-text

Improving Resistance of Foeniculum Vulgare to Water Deficit Stress by Natural Regulators

Agriculture (Pol nohospodárstvo) ◽

10.2478/agri-2021-0003 ◽

2021 ◽

Vol 67 (1) ◽

pp. 29-41

Author(s):

Farshad Sorkhi ◽

Ramin Rostami ◽

Kazem Ghassemi-Golezani

Keyword(s):

Salicylic Acid ◽

Essential Oil ◽

Water Deficit ◽

Seed Yield ◽

Foliar Application ◽

Foliar Spray ◽

Proline Content ◽

Water Deficit Stress ◽

Foeniculum Vulgare ◽

Severe Water Deficit

Abstract This research was conducted as a combined analysis with four replications in two years (2018 ‒ 2019). Treatments were irrigation up to 90%, 50%, and 20% field capacity (as normal irrigation, moderate and severe water deficit stresses, respectively) and foliar application of natural regulators (untreated as control, salicylic acid, spermidine, and methanol). Increasing water deficit stress was led to a significant increase in essential oil percentage and proline content and a significant decrease in yield parameters and seed yield. Most of the traits (except the percentage of essential oil) were affected by natural growth regulators. The highest seed yield (1,127.59 kg/ha), plant biomass (5,426.92 kg/ha), essential oil yield (22.67 kg/ha), and proline content (29.34 μmol/g fresh weight) were obtained in methanol treated plants under normal irrigation. However, the highest amount of these traits under moderate and severe water deficit was recorded for salicylic acid-treated plants. Therefore, foliar spray of methanol was a useful treatment for non-stress conditions, but, application of salicylic acid was the superior treatment for reducing the negative effects of water deficit stress on Foeniculum vulgare.

Download Full-text

Essential Oil Composition at Different Plant Growth Development of Peppermint (Mentha x piperita L.) Under Water Deficit Stress

Journal of Essential Oil Bearing Plants ◽

10.1080/0972060x.2019.1581095 ◽

2019 ◽

Vol 22 (2) ◽

pp. 431-440 ◽

Cited By ~ 2

Author(s):

Gholamreza Abdi ◽

Majid Shokrpour ◽

Seyed Alireza Salami

Keyword(s):

Essential Oil ◽

Plant Growth ◽

Water Deficit ◽

Essential Oil Composition ◽

Water Deficit Stress ◽

Oil Composition ◽

Mentha X Piperita ◽

Growth Development

Download Full-text

Application of zeolite improves water and nitrogen use efficiency while increasing essential oil yield and quality of Salvia officinalis under water-deficit stress

Saudi Journal of Biological Sciences ◽

10.1016/j.sjbs.2021.10.059 ◽

2021 ◽

Author(s):

Saeid Hazrati ◽

Sara Khurizadeh ◽

Amir Reza Sadeghi

Keyword(s):

Essential Oil ◽

Water Deficit ◽

Nitrogen Use Efficiency ◽

Salvia Officinalis ◽

Water Deficit Stress ◽

Nitrogen Use ◽

Yield And Quality ◽

Use Efficiency ◽

Essential Oil Yield

Download Full-text

Physiological and biochemical changes in Matricaria chamomilla induced by Pseudomonas fluorescens and water deficit stress

Acta agriculturae Slovenica ◽

10.14720/aas.2018.111.1.07 ◽

2018 ◽

Vol 111 (1) ◽

pp. 63 ◽

Cited By ~ 5

Author(s):

Hamid MOHAMMADI ◽

Mohammad ESMAILPOUR ◽

Samaneh GHORBI ◽

Mehrnaz HATAMI

Keyword(s):

Essential Oil ◽

Pseudomonas Fluorescens ◽

Water Deficit ◽

Stress Condition ◽

Growth Parameters ◽

Dry Mass ◽

Water Deficit Stress ◽

Matricaria Chamomilla ◽

Seedling Inoculation ◽

Oil Concentration

Environmental stresses and rhizosphere microorganisms affect growth parameters and accumulation of active ingredients especially in plants with medicinal properties. The present study examined the effects of chamomile (Matricaria chamomilla L.) seedling inoculation with Pseudomonas fluorescens PF-135 strain on its growth parameters, photosynthetic pigments, proline, malondialdehyde (MDA), and hydrogen peroxide (H2O2) content, and essential oil concentration at both regular watering and water deficit experiments. Based on the obtained results, water deficit stress reduced root dry mass, and flower fresh and dry mass as well. However, amount of H2O2 and MDA in root and shoot tissues were considerably lower in inoculated plants compared to non-inoculated ones under both normal watering and water deficit regimes. It indicates that lipid peroxidation and production of reactive oxygen species has been diminished in inoculated plants. Also, essential oil content in inoculated plants significantly increased compared with that of non-inoculated ones under water deficit stress condition. It can be concluded that P. fluorescens PF-135 strain has an outstanding potential to alleviate adverse effects of water deficit on plant growth, and hence can be used as an excellent PGPR in order to boost chamomile productivity especially under water deficit stress condition.

Download Full-text