Protein content, antioxidant activity, carbohydrates and photosynthesis in leaves of girdled stems of four olive cultivars

Annabi, K.; Laaribi, Ibtissem; Gouta, Hassouna; Laabidi, Foued; Mechri, Beligh; Larbi, Ajmi; Zouari, Imen; Muscolo, Adele; Panuccio, Maria Rosaria; Mezghani, Mouna Aïachi

doi:10.1016/j.scienta.2019.108551

Cited by 12 publications

(7 citation statements)

References 51 publications

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“…However, carbohydrate resources within a tree could be manipulated by branch or trunk girdling to minimize competition for resources between fruit and rapidly growing shoots. It has been demonstrated that girdling promoted carbohydrate accumulation above the girdle portion of the tree by preventing the basipetal movement of photosynthetic assimilates through the phloem (Annabi et al, 2019;Quentin et al, 2013;Vemmos et al, 2012). After MBG treatment, the change of starch level in the treated leaves kept pace with that in the control, only at day 30 after treatment MBG led to a significantly larger accumulation of starch compared with the control.…”

Section: Discussionmentioning

confidence: 99%

“…Girdling, defined as the removal of a ring of bark around the branches or trunk, is an important technique and has been widely used to improve fruit retention and increase fruit yield (Annabi et al, 2019;Goren et al, 2003;Khandaker et al, 2011). The effects of girdling have been related to the interruption of phloem transport pathway, which resulted in the blocking of the downward transport of photosynthates (Urban and Alphonsout, 2007;Wang et al, 2006), basipetal flow of IAA (Dann et al, 1985), and acropetal flow of CTK (Havelange et al, 2000), thereby increasing carbohydrate availability for the developing organ above the girdle (Casanova et al, 2009;Rivas et al, 2006) and modifying the hormonal balance in the canopy (Kong et al, 2012;Shivashankara et al, 2019).…”

Section: Macadamia (Macadamia Integrifolia Andmentioning

confidence: 99%

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Reduction of Early Fruit Abscission by Main-branch-girdling in Macadamia Is Related to the Favorable Status of Carbohydrates and Endogenous Hormones

Yang

Chen

et al. 2022

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Fruit abscission occurring severely in the early fruit development affects macadamia yield. Developing effective methods to improve fruit retention is a priority for macadamia cultivation and production. Girdling is an important horticultural practice that has been widely used to increase fruit yield. Previous studies have shown that girdling fails to increase macadamia yield despite enhancing the early fruit set, but few have examined the effect of girdling on its related physiological mechanism. The objective of this study was to investigate the effects of main-branch girdling (MBG) on early fruit retention and also on the levels of carbohydrates and endogenous hormones in the leaves, bearing shoots and fruit of macadamia. Herein, MBG was performed at fruit set using a single-blade knife on 9-year-old macadamia trees (Macadamia integrifolia). Results showed that MBG significantly reduced young fruit drop, concurrent with significant increases in the contents of starch in both the leaves and the bearing shoots and in glucose, fructose, and sucrose levels in the husk and seed. It was suggested that the availability of carbohydrate for fruit retention was improved by MBG. Additionally, MBG increased indole-3-acetic acid (IAA), gibberellin (GA3), and zeatin-riboside (ZR, a type of cytokinin) concentrations and decreased abscisic acid (ABA) contents in the husk and the seed, indicating that MBG reduced the early fruit drop by modifying the balance of endogenous hormones. Therefore, a positive interplay between carbohydrates and endogenous hormones induced by MBG was involved in the reduction of early fruit abscission in macadamia.

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Section: Discussionmentioning

confidence: 99%

Section: Macadamia (Macadamia Integrifolia Andmentioning

confidence: 99%

Reduction of Early Fruit Abscission by Main-branch-girdling in Macadamia Is Related to the Favorable Status of Carbohydrates and Endogenous Hormones

Yang

Chen

et al. 2022

horts

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“…Olive leaves contain a wide variety of carbohydrates, including glucose, mannitol, fructose, arabinose, myo-inositol, xylotol, xylose, galactinol, galactose, sucrose, raffinose, stachyose and many others. Among them, glucose and mannitol are the most abundant [200,201). Moula et al [20] found, in their investigation of the quantification of soluble sugars in young olive plants (cultivars 'Chemlali' and 'Koroneiki') submitted to salt stress, a significant increase in the concentration of mannitol, which was the most abundant sugar, while glucose and fructose showed no variation under this stress.…”

Section: Sugar Accumulationmentioning

confidence: 99%

Tolerance Mechanisms of Olive Tree (<em>Olea europaea</em>) Under Saline Conditions

El Yamani,

Cordovilla

2024

Preprint

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The olive tree (Olea europaea L.) is an evergreen tree that occupies 19% of the woody crop area and is cultivated in 67 countries on five continents. The largest olive production is concentrated in the Mediterranean basin, where the olive tree has had an enormous economic, cultural and environmental impact since the 7th century BC. In the Mediterranean region, salinity stands out as one of the main abiotic stress factors significantly affecting agricultural production. Moreover, climate change is expected to lead to increased salinisation in this region, threatening olive productivity. Salt stress causes combined damage by osmotic stress and ionic toxicity, restricting olive growth and interfering with multiple metabolic processes. A large variability in salinity tolerance among olive cultivars has been described. This paper aims to synthesize information from the published literature on olive adaptations to salt stress and its importance in salinity tolerance. The morphological, physiological, biochemical, and molecular mechanisms of olive tolerance to salt stress are reviewed.

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“…Limb damage depth and griddling may positively affect ethylene which stimulates the induction of the floral buds and improve flowering in the following season. An increase in flower initiation following possible phloem blockage due to vibrating action, is usually evident in the season following treatment (Annabi, et al, 2019).…”

Section: Limb Damage Depth (Ld) At Point Of Contact With Shaking Machine Clampmentioning

confidence: 99%

Development of a Pneumatic Olive Harvester

et al. 2021

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A pneumatic olive harvester was developed and evaluated in this study. The components of the developed machine were the limb clamp, vibrating unit, control elements, main tube, air-pressured hoses, control valve, and power source. The measurements that related to the development of the harvester were fruit and limb damage, and some physical and mechanical properties of the olives fruit-stem system. The results demonstrated that the effectiveness of the developed machine to harvest olive fruits. The appropriateness of the developed machine was evaluated by some criteria: machine productivity, fruit removal, fruit damage, limb damage depth at the contact point with the clamp of the machine, breakage of shaken limb, and consumed energy. The suitable values of these criteria were achieved at 27 Hz frequency and 60 mm stroke.

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Protein content, antioxidant activity, carbohydrates and photosynthesis in leaves of girdled stems of four olive cultivars

Cited by 12 publications

References 51 publications

Reduction of Early Fruit Abscission by Main-branch-girdling in Macadamia Is Related to the Favorable Status of Carbohydrates and Endogenous Hormones

Reduction of Early Fruit Abscission by Main-branch-girdling in Macadamia Is Related to the Favorable Status of Carbohydrates and Endogenous Hormones

Tolerance Mechanisms of Olive Tree (<em>Olea europaea</em>) Under Saline Conditions

Development of a Pneumatic Olive Harvester

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