Screening of Chilli Pepper Genotypes as a Source of Capsaicinoids and Antioxidants under Conditions of Simulated Drought Stress

Tomas Kopta , Agnieszka Sękara , Robert Pokluda , Vojtech Ferby , Gianluca Caruso

Abstract

In many regions of the world, the production of vegetable crops is limited by a deepening water crisis. Drought stress affects productivity and the chemical composition of crops. The variability of drought tolerance between species and cultivars of economically important crops, such as pepper (Capsicum species), requires specific investigations to understand the physiological and biochemical responses to the aftermath of drought. The fruits and leaves of four chilli pepper cultivars were investigated to elucidate the fruits’ pungency (Scoville Heat Units, SHU), ascorbic acid content, DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity, polyphenol content, membrane lipid peroxidation and key protective antioxidant enzyme activity under drought stress (18–28% volumetric water content) as compared to the control (35–60%). Drought increased the chilli pepper fruits’ pungency expressed in Scoville Heat Units (SHU) as well as ascorbic acid content, but this relationship was also dependent on genotype and stress duration. ‘Jolokia’ was marked as most sensitive to drought by increasing content of capsaicinoids and DPPH˙ scavenging activity under stress conditions. Capsaicinoids and Ascorbic acid (AsA) greatly influenced the antioxidant activity of highly pungent chilli pepper fruits, although total phenols played a significant role in the mildly pungent genotypes. Generally, the activities of antioxidant enzymes increased under drought in chilli pepper leaves and fruits, although the intensity of the reaction varied among the cultivars used in the current research. All the investigated biochemical parameters were involved in the drought response of chilli pepper plants, but their significance and effectiveness were highly cultivar-dependent.
Author Tomas Kopta - Mendel University in Brno
Tomas Kopta,,
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, Agnieszka Sękara (FoBaH / Department of Horticulture)
Agnieszka Sękara,,
- Department of Horticulture
, Robert Pokluda - Mendel University in Brno
Robert Pokluda,,
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, Vojtech Ferby - Mendel University in Brno
Vojtech Ferby,,
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, Gianluca Caruso - University of Naples Federico II
Gianluca Caruso,,
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Journal seriesPlants, [Plants], ISSN 2223-7747, e-ISSN 2223-7747, (N/A 70 pkt)
Issue year2020
Vol9
No3
Pages1-17
Publication size in sheets0.8
Article number364
Keywords in EnglishCapsicum; cultivar; stress; soluble carbohydrates; ascorbic acid; phenolics; radical scavenging activity; Scoville Heat Units
ASJC Classification1105 Ecology, Evolution, Behavior and Systematics; 1110 Plant Science; 2303 Ecology
DOIDOI:10.3390/plants9030364
URL https://www.mdpi.com/2223-7747/9/3/364/pdf
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
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Screening of Chilli Pepper Genotypes as a Source of Capsaicinoids and Antioxidants under Conditions of Simulated Drought Stress of 02-04-2020
1,85 MB
Score (nominal)70
Score sourcejournalList
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.969; WoS Impact Factor: 2018 = 2.632 (2)
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FinansowanieThis research was funded within the project CZ.02.1.01/0.0/0.0/16_017/0002334 Research Infrastructure for Young Scientists, co-financed by the Operational Programme Research, Development and Education and by Project IGA-ZF/2019-AP004 from Mendel University in Brno. This research was also partially supported by the Ministry of Science and Higher Education of the Republic of Poland.
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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