Next Article in Journal
Identifying Symptoms of Bankruptcy Risk Based on Bankruptcy Prediction Models—A Case Study of Poland
Next Article in Special Issue
The Potential Impact of Climate Extremes on Cotton and Wheat Crops in Southern Punjab, Pakistan
Previous Article in Journal
Spatiotemporal Statistical Imbalance: A Long-Term Neglected Defect in UN Comtrade Dataset
Previous Article in Special Issue
Effect of Marginal-Quality Irrigation on Accumulation of some Heavy Metals (Mn, Pb, and Zn) in TypicTorripsamment Soils and Food Crops
 
 
Article

Hyperspectral Imagery Detects Water Deficit and Salinity Effects on Photosynthesis and Antioxidant Enzyme Activity of Three Greek Olive Varieties

1
Department of Geoinformation in Environmental Management, Mediterranean Agronomic Institute of Chania, 73100 Chania, Greece
2
ELGO-DIMITRA, Institute of Olive Tree, Subtropical Crops and Viticulture, Leoforos Karamanli 167, 73134 Chania, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Svein Øivind Solberg
Sustainability 2022, 14(3), 1432; https://doi.org/10.3390/su14031432
Received: 7 December 2021 / Revised: 20 January 2022 / Accepted: 25 January 2022 / Published: 26 January 2022
(This article belongs to the Collection Sustainable Soil Management in a Changing Climate)
The olive tree (Olea europaea L.) is one of the main crops of the Mediterranean region which suffers from drought and soil salinization. We assessed the photosynthetic rate, leaf water content and antioxidative enzyme activity (APX, GPX, SOD and CAT) of three Greek olive cultivars (‘Amfisis’, ‘Mastoidis’ and ‘Lefkolia Serron’) subjected to drought and salinity stresses. Hyperspectral reflectance data were acquired using an analytical spectral device (ASD) FieldSpec® 3 spectroradiometer, while principal component regression, partial least squares regression and linear discriminant analysis were used to estimate the relationship between spectral and physiological measurements. The photosynthetic rate and water content of stressed plants decreased, while enzyme activity had an increasing tendency. ‘Amfisis’ was more resistant to drought and salinity stress than ‘Mastoidis’ and ‘Lefkolia Serron’. The NDVI appeared to have the highest correlation with the photosynthetic rate, followed by the PRI. APX enzyme activity was the most highly correlated with the 1150–1370 nm range, with an additional peak at 1840 nm. CAT enzyme activity resulted in the highest correlation with the visible part of the spectrum with two peaks at 1480 nm and 1950 nm, while GPX enzyme activity appeared to have a strong correlation within all the available spectral ranges except for 670–1180 nm. Finally, SOD activity showed high correlation values within 1190–1850 nm. This is the first time the correlation of hyperspectral imagery with photosynthetic rate and antioxidant enzyme activities was determined, providing the background for high-throughput plant phenotyping through a drone with a hyperspectral camera. This progress would provide the possibility of early stress detection in large olive groves and assist farmers in decision making and optimizing crop management, health and productivity. View Full-Text
Keywords: antioxidant enzymes; Olea europaea L.; photosynthesis; PCR; plant phenotyping; PLSR; remote sensing; sustainability; vegetation indices antioxidant enzymes; Olea europaea L.; photosynthesis; PCR; plant phenotyping; PLSR; remote sensing; sustainability; vegetation indices
Show Figures

Figure 1

MDPI and ACS Style

Boshkovski, B.; Doupis, G.; Zapolska, A.; Kalaitzidis, C.; Koubouris, G. Hyperspectral Imagery Detects Water Deficit and Salinity Effects on Photosynthesis and Antioxidant Enzyme Activity of Three Greek Olive Varieties. Sustainability 2022, 14, 1432. https://doi.org/10.3390/su14031432

AMA Style

Boshkovski B, Doupis G, Zapolska A, Kalaitzidis C, Koubouris G. Hyperspectral Imagery Detects Water Deficit and Salinity Effects on Photosynthesis and Antioxidant Enzyme Activity of Three Greek Olive Varieties. Sustainability. 2022; 14(3):1432. https://doi.org/10.3390/su14031432

Chicago/Turabian Style

Boshkovski, Blagoja, Georgios Doupis, Anhelina Zapolska, Chariton Kalaitzidis, and Georgios Koubouris. 2022. "Hyperspectral Imagery Detects Water Deficit and Salinity Effects on Photosynthesis and Antioxidant Enzyme Activity of Three Greek Olive Varieties" Sustainability 14, no. 3: 1432. https://doi.org/10.3390/su14031432

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop