Hormonal Regulation in Different Varieties of Chenopodium quinoa Willd. Exposed to Short Acute UV-B Irradiation

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Mariotti , L , Huarancca Reyes , T , Ramos-Diaz , J M , Jouppila , K & Guglielminetti , L 2021 , ' Hormonal Regulation in Different Varieties of Chenopodium quinoa Willd. Exposed to Short Acute UV-B Irradiation ' , Plants , vol. 10 , no. 5 , 858 . https://doi.org/10.3390/plants10050858

Title: Hormonal Regulation in Different Varieties of Chenopodium quinoa Willd. Exposed to Short Acute UV-B Irradiation
Author: Mariotti, Lorenzo; Huarancca Reyes, Thais; Ramos-Diaz, Jose Martin; Jouppila, Kirsi; Guglielminetti, Lorenzo
Contributor: University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Food and Nutrition
Date: 2021-04-23
Language: eng
Number of pages: 13
Belongs to series: Plants
ISSN: 2223-7747
URI: http://hdl.handle.net/10138/329901
Abstract: Increased ultraviolet-B (UV-B) due to global change can affect plant development and metabolism. Quinoa tolerates extreme conditions including high UV levels. However, the physiological mechanisms behind its abiotic stress tolerance are unclear, especially those related to UV-B. We previously demonstrated that 9.12 kJ m−2 d−1 may induce UV-B-specific signaling while 18.24 kJ m−2 d−1 promotes a UV-B-independent response. Here, we explored the effects of these UV-B doses on hormonal regulation linked to plant morphology and defense among diverse varieties. Changes in fluorescence parameters of photosystem II, flavonoids and hormones (indoleacetic acid (IAA), jasmonic acid (JA), abscisic acid (ABA) and salicylic acid (SA)) were surveyed under controlled conditions. Here, we showed that the sensitivity to short acute UV-B doses in varieties from different habitats is influenced by their parental lines and breeding time. UV-B sensitivity does not necessarily correlate with quinoa’s geographical distribution. The role of flavonoids in the UV-B response seems to be different depending on varieties. Moreover, we found that the extent of changes in JA and SA correlate with UV-B tolerance, while the increase of ABA was mainly related to UV-B stress.
Subject: 11831 Plant biology
indoleacetic acid
abscisic acid
chlorophyll fluorescence
flavonoids
jasmonic acid
salicylic acid
quinoa
ultraviolet-B
RESISTANCE LOCUS8
RADIATION
ARABIDOPSIS
RESPONSES
STRESS
ACCUMULATION
FLAVONOIDS
DEFENSE
PROFILE
GROWTH
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