The Effect of Low Temperature on Physiological, Biochemical and Flowering Functions of Olive Tree in Relation to Genotype

Mougiou, Niki; Baalbaki, Boushra; Doupis, Georgios; Kavroulakis, Nektarios; Poulios, Stylianos; Vlachonasios, Konstantinos E.; Koubouris, Georgios C.

doi:10.3390/su122310065

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The Effect of Low Temperature on Physiological, Biochemical and Flowering Functions of Olive Tree in Relation to Genotype

Niki Mougiou

^1,†

Boushra Baalbaki

^2,†,

Georgios Doupis

³,

Nektarios Kavroulakis

³,

Stylianos Poulios

¹,

Konstantinos E. Vlachonasios

and

Georgios C. Koubouris

^3,*

Department of Botany, School of Biology, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

Department of Sustainable Agriculture, Mediterranean Agronomic Institute of Chania (CIHEAM), Alsyllio Agrokepiou, P.O. Box 85, 73100 Chania, Greece

Institute for Olive Tree, Subtropical Crops and Viticulture, ELGO DEMETER, Agrokipio, 73100 Chania, Greece

Author to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Sustainability 2020, 12(23), 10065; https://doi.org/10.3390/su122310065

Received: 11 October 2020 / Revised: 28 November 2020 / Accepted: 30 November 2020 / Published: 2 December 2020

(This article belongs to the Special Issue Sustainable Soil Management in a Changing Climate)

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Abstract

Olive tree growth and reproduction are severely affected by temperature extremes, compromising fruit yield. In that aspect, the olive varieties “Koroneiki” and “Mastoidis” were employed in a mild cold stress experiment, imitating night frost incidents to assess their biochemical, physiological and reproductive functions in relation to genotype. The physiological performance of the stressed plants was not significantly altered, suggesting that both cultivars were well adapted to mild cold night stress. The biochemical response of the plants, regarding antioxidant enzymes, H₂O₂ and TBARS accumulation, confirmed that both cultivars could cope with the stress applied. The mRNA levels of the PPO gene, which participates in hydroxytyrosol biosynthesis and plant defense, were elevated after 24-h stress at 0 °C, in both cultivars with “Mastoidis” plants exhibiting higher levels for a longer period. Three more genes involved in hydroxytyrosol biosynthesis upregulated their expression levels as a response to cold stress. The numerous plant phenology aspects measured reinforced the conclusion that both cultivars responded to the stress applied. The results of the present study may contribute to better understanding olive tree adaptive responses to low temperature events, an abiotic stress condition that is often present in an open plantation, thus assisting farmers on breeding and cultivar selection. View Full-Text

Keywords: antioxidant enzymes; climate change; frost damage; photosynthesis; plant phenotyping

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MDPI and ACS Style

Mougiou, N.; Baalbaki, B.; Doupis, G.; Kavroulakis, N.; Poulios, S.; Vlachonasios, K.E.; Koubouris, G.C. The Effect of Low Temperature on Physiological, Biochemical and Flowering Functions of Olive Tree in Relation to Genotype. Sustainability 2020, 12, 10065. https://doi.org/10.3390/su122310065

AMA Style

Mougiou N, Baalbaki B, Doupis G, Kavroulakis N, Poulios S, Vlachonasios KE, Koubouris GC. The Effect of Low Temperature on Physiological, Biochemical and Flowering Functions of Olive Tree in Relation to Genotype. Sustainability. 2020; 12(23):10065. https://doi.org/10.3390/su122310065

Chicago/Turabian Style

Mougiou, Niki, Boushra Baalbaki, Georgios Doupis, Nektarios Kavroulakis, Stylianos Poulios, Konstantinos E. Vlachonasios, and Georgios C. Koubouris 2020. "The Effect of Low Temperature on Physiological, Biochemical and Flowering Functions of Olive Tree in Relation to Genotype" Sustainability 12, no. 23: 10065. https://doi.org/10.3390/su122310065

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The Effect of Low Temperature on Physiological, Biochemical and Flowering Functions of Olive Tree in Relation to Genotype

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