The Interplay of Physiological and Biochemical Response to Short-Term Drought Exposure in Garlic (Allium sativum L.)
Author:
Kovačević Tvrtko Karlo1ORCID, Išić Nina1, Major Nikola12ORCID, Krpan Marina3ORCID, Ban Dean12, Franić Mario12ORCID, Goreta Ban Smiljana12ORCID
Affiliation:
1. Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, K. Hugues 8, 52440 Poreč, Croatia 2. Centre of Excellence for Biodiversity and Molecular Plant Breeding, Svetošimunska 1, 10000 Zagreb, Croatia 3. Department of Food Quality Control, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
Abstract
The impacts of global climate change and a rapid increase in population have emerged as major concerns threatening global food security. Environmental abiotic stress, such as drought, severely impairs plants’ morphology, physiology, growth, and yield more than many other environmental factors. Plants use a complex set of physiological, biochemical, and molecular mechanisms to combat the negative effects caused by drought-induced stress. The aim of this study was to investigate morphological, spectral, physiological, and biochemical changes occurring in 30 garlic accessions exposed to short-term drought stress in a greenhouse setting and to identify potential early drought-induced stress markers. The results showed that, on average, garlic plants exposed to drought conditions exhibited a decrease in assimilation, transpiration, and stomatal conductance of 39%, 52%, and 50%, respectively, and an average increase in dry matter and proline content of 10.13% and 14.29%, respectively. Nevertheless, a significant interaction between the treatment and accessions was observed in the investigated photosynthetic and biochemical parameters. The plants’ early response to drought ranged from mild to strong depending on garlic accession. Multivariate analysis showed that accessions with a mild early drought response were characterized by higher values of assimilation, transpiration, and stomatal conductance compared to plants with moderate or strong early drought response. Additionally, accessions with strong early drought response were characterized by higher proline content, lipid peroxidation, and antioxidant capacity as measured by FRAP compared to accessions with mild-to-moderate early drought response.
Funder
Biodiversity and Molecular Plant Breeding, Centre of Excellence for Biodiversity and Molecular Plant Breeding (CoE CroP-BioDiv), Zagreb, Croatia
Subject
Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics
Reference55 articles.
1. Chen, S., Shen, X., Cheng, S., Li, P., Du, J., Chang, Y., and Meng, H. (2013). Evaluation of Garlic Cultivars for Polyphenolic Content and Antioxidant Properties. PLoS ONE, 8. 2. Comparative Analysis of Some Garlic Varieties under Drought Stress Conditions;Badran;J. Agric. Sci.,2015 3. Food and Agriculture Organization of the United Nations (2023, March 02). S.D. FAOSTAT. Available online: http://www.fao.org/faostat/en/#data/QC/visualize. 4. Evaluation of Allicin Content and Botanical Traits in Iranian Garlic (Allium sativum L.) Ecotypes;Baghalian;Sci. Hortic.,2005 5. Changes in Phenolic Compounds in Garlic (Allium sativum L.) Owing to the Cultivar and Location of Growth;Beato;Plant Foods Hum. Nutr.,2011
|
|