Affiliation:
1. Department of Medicinal and Aromatic Plants, Institute of Horticultural Sciences Hungarian University of Agriculture and Life Sciences , Villányi út 29-43 H-1118 Budapest , Hungary
Abstract
SummaryIntroduction:Drought stress is known to change biochemical activities resulting in altered plant growth and development.Objective:Due to the shortage of research evidence in a certain taxa of basil, it is imperative to examine the relationship between drought stress and morphological changes as well as essential oil accumulation.Methods:An open field experiment was conducted in 2020 to determine the effects of drought stress on the morphological and biochemical responses of selectedOcimumspecies. Five basil species, namelyO. basilicum‘Genovese’,O. basilicum‘Ohre’,O. × africanum,O. americanum,O. selloi, andO. sanctum‘Krishna’ were grown under irrigated (control) and non-irrigated (drought stress treatment) plots with two block replications.Results:The result showed that irrigation had a positive effect on production. Consequently, fresh and dry biomass yields were higher on irrigated plots by 39% and 33%, respectively. No significant changes were detected between the treatments in essential oils (EO) yield and EO composition of major compounds. However, a slight increase in camphor (O. × africanum), nerol (O. americanum), and trans-β-caryophyllene (O. sanctum‘Krishna’) ratios were observed under irrigation treatments. On the other hand, drought stress increased EO content, polyphenol content, and antioxidant capacity. Furthermore, drought stress had a positive effect on the ratios of 1,8-cineole (O. × africanum), and eugenol (O. sanctum‘Krishna’). There is only a slight increase in EO content under drought stress, which is not comparable to the significant yield reduction recorded. Morphological and biochemical variations were also detected among basil species. Accordingly, higher biomass (616.33 g/plant) and EO yield (3.72 ml/100 g) among the species were obtained fromO. basilicum‘Genovese’ andO. × africanum, respectively.Conclusion:Irrigation is imperative for maximizing biomass and EO yield of tested basil species.
Reference38 articles.
1. 1. Hiltunen R, Holm Y. Essential oil of Ocimum. In: Basil: The Genus Ocimum. Amsterdam. Har-wood Academic Publishers 1999; 77-111.
2. 2. Shasany AK, Kole C. The Ocimum genome, compendium of plant genomes. Switzerland. Springer Nature 2018. doi: https://www.springer.com/series/1180510.1007/978-3-319-97430-9
3. 3. Maddi R, Amani P, Bhavitha S, Gayathri T, Lohitha T. A review on Ocimum species: Ocimum americanum L., Ocimum basilicum L., Ocimum gratissimum L. and Ocimum tenuiflorum L. Inter J Res Ayurv Pharm 2019; 10(3):41-48. doi: https://dx.doi.org/10.7897/2277-4343.10035910.7897/2277-4343.100359
4. 4. Carović-Stanko K, Liber Z, Besendorfer V, Javornik B, Bohanec B, Kolak I, Satovic Z. Genetic relations among basil taxa (Ocimum L.) based on molecular markers, nuclear DNA content, and chromosome number. Plant Syst Evol 2009; 285(1-2):13-22. doi: https://dx.doi.org/10.1007/s00606-009-0251-z10.1007/s00606-009-0251-z
5. 5. Simon JE, Quinn J, Murray RG. Basil: A source of essential oils. In: Proceedings of the 1st National Symposium NEW CROPS: Research, Development, Economics, Indianapolis, Indiana, October 1988; Timber Press, Portland, Oregon. 1990; 484-489.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献