Biochemical changes of some olive (Olea europaea L.) cultivars under water-deficit stress

This experiment was carried out to determine the effect of water stress on the biochemical characteristics of three young potted olive cultivars during the 2015 growing season.
A factorial experiment based on a completely randomized design was used with three replications in the Gilan-e Gharb region of Kermanshah province.
One-year-old rooted cuttings of three olive cultivars (‘Zard’, ‘Amigdalolia’, and ‘Conservolia’) were planted in 12-L pots and subjected to three irrigation treatments: control (100% of field capacity), 75% and 50% field capacity during 120 days from May 10 to September 21, 2015. Biochemical characteristics such as chlorophyll a, b and total, proline, and total carbohydrate were measured at the end of the experiment.
Chlorophyll a, b and total, proline, and total carbohydrate were significantly different among cultivars under water-deficit conditions.
Water deficit reduced the chlorophyll content of all cultivars compared to the controls.
The lowest total chlorophyll content occurred in ‘Conservolia’ olive under severe water deficit in comparison to the other cultivars.
Water deficit induced an increase in free proline and soluble carbohydrates in all olive cultivars.
The highest rate of proline and carbohydrate increase was recorded in ‘Conservolia’ olive (45.1 and 65.2%, respectively) by 50% water deficit compared to well-watered control plants.
Generally, based on the results cultivars responded differentially to water-deficit. ‘Conservolia’ was more tolerant than the others.

I International Conference and X National Horticultural Science Congress of Iran (IrHC2017)

I. Arji, S. Ahmadipour, A. Ebadi, V. Abdosi

biochemical markers, proline, carbohydrate, chlorophyll

https://doi.org/10.17660/ActaHortic.2021.1315.57