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Volume 13
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10.3390/w13091284
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Article

Effect of Water Supply on Physiological Response and Phytonutrient Composition of Chili Peppers

by
Stella Agyemang Duah
1,*,
Clarice Silva e Souza
1,
Zsuzsa Nagy
1,
Zoltán Pék
1,
András Neményi
1,
Hussein G. Daood
2,
Szergej Vinogradov
3 and
Lajos Helyes
1
1
Institute of Horticulture, Faculty of Agriculture and Environmental Sciences, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
2
Regional Knowledge Centre, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
3
Department of Economics and Methodology, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
*
Author to whom correspondence should be addressed.
Water 2021, 13(9), 1284; https://doi.org/10.3390/w13091284
Submission received: 25 March 2021 / Revised: 28 April 2021 / Accepted: 30 April 2021 / Published: 1 May 2021
(This article belongs to the Special Issue Crop Water Stress and Deficit Irrigation)
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Abstract

Water supply is a primary contributor to the growth and phytonutrient composition in chili peppers. Several physiological stress factors can influence phytonutrients in chili peppers, resulting in their differential synthesis. Maintaining the right and exact amount of water through a drip system can promote an effective fruit set and crop quality. Four pepper cultivars (‘Hetényi Parázs’; HET, ‘Unikal’; UNIK, ‘Unijol’; UNIJ and ‘Habanero’; HAB) were investigated under different water supply treatments: RF or rain-fed, DI or deficit irrigation, and OWS or optimum water supply. The two-year experiment was carried out in May 2018 and 2019 under open field conditions. Physiological parameters (relative chlorophyll content, chlorophyll fluorescence, and canopy temperature) were measured during the growth stage and phytonutrients (vitamin C, capsaicinoids and carotenoids) analyzed using high-performance liquid chromatography (HPLC) at harvest in September. The study revealed that, due to higher precipitation and rainfall interruption, increased water supply affected physiological response and phytonutrients in the cultivars. HAB under OWS had a lower response during the growth period when compared to HET, UNIK, and UNIJ. As water supply increased, measured individual carotenoid concentration increased in some cultivars. On the other hand, as water supply decreased, vitamin C and capsaicinoids concentration increased. Even though cultivars responded to the water supply treatments differently, HET exhibited a more uniform and stable composition in all treatments.
Keywords: Capsicum sp.; physiological response; water supply; phytonutrients Capsicum sp.; physiological response; water supply; phytonutrients

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MDPI and ACS Style

Agyemang Duah, S.; Silva e Souza, C.; Nagy, Z.; Pék, Z.; Neményi, A.; Daood, H.G.; Vinogradov, S.; Helyes, L. Effect of Water Supply on Physiological Response and Phytonutrient Composition of Chili Peppers. Water 2021, 13, 1284. https://doi.org/10.3390/w13091284

AMA Style

Agyemang Duah S, Silva e Souza C, Nagy Z, Pék Z, Neményi A, Daood HG, Vinogradov S, Helyes L. Effect of Water Supply on Physiological Response and Phytonutrient Composition of Chili Peppers. Water. 2021; 13(9):1284. https://doi.org/10.3390/w13091284

Chicago/Turabian Style

Agyemang Duah, Stella, Clarice Silva e Souza, Zsuzsa Nagy, Zoltán Pék, András Neményi, Hussein G. Daood, Szergej Vinogradov, and Lajos Helyes. 2021. "Effect of Water Supply on Physiological Response and Phytonutrient Composition of Chili Peppers" Water 13, no. 9: 1284. https://doi.org/10.3390/w13091284

APA Style

Agyemang Duah, S., Silva e Souza, C., Nagy, Z., Pék, Z., Neményi, A., Daood, H. G., Vinogradov, S., & Helyes, L. (2021). Effect of Water Supply on Physiological Response and Phytonutrient Composition of Chili Peppers. Water, 13(9), 1284. https://doi.org/10.3390/w13091284

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