Effect of Light Intensity and Carbohydrate Reserves on Flowering in Olive

Stutte, G.W.; Martin, George C.

doi:10.21273/jashs.111.1.27

Cited by 39 publications

(7 citation statements)

References 5 publications

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“…54 Source-sink limitation olives also differ in leaf carbohydrate and mineral content. 12,55,56 It follows that carbohydrates play a crucial role in source-sink limitation.…”

Section: Discussionmentioning

confidence: 99%

Reducing the sink/source ratio of on‐date palm plants during fruit growth has physiological and biochemical impacts on the shift in source–sink limitations

Alikhani-Koupaei¹,

Nia

2023

J Sci Food Agric

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BACKGROUNDThe present study examined the impact of reducing the ‘sink’ on the ‘source’ in On‐palms with a bunch number greater than eight. The capacity of leaves and fruit, as well as assimilate loading and unloading in phloem, restrict plant growth and yield. The study evaluated yield components, as well as photosynthetic and hormonal feedback, resulting from source–sink relationships.RESULTSDuring the mid‐Kimri, removing bunches from On‐trees stabilized yield components and fruit size, suggesting that On‐trees have a sink limitation. Bunch thinning boosted these indicators compared to normal trees with a bunch number between six and eight inclusive, indicating that On‐trees had source limitations. In mid‐Khalal, the treatments presented a type of source and sink limitation that is opposite to mid‐Kimri. The thinning techniques addressed the source–sink limitation by adjusting the additional carbon allocation. This resulted in an increase of non‐reducing sugars and starch in different organs, whereas reducing sugars decreased. These adjustments were made to reduce sucrose‐phosphate synthase and sucrose synthase activity, raising invertase activity, lowering indole‐3‐acetic acid, zeatin, gibberellin, and abscisic acid hormone levels in fruits, as well as lowering trehalose production in organs. Levels of hormones, enzymes, and trehalose showed less variation during bunch thinning and source limitation compared to bunch removal and sink limitation.CONCLUSIONAt Rutab, thinning types demonstrated the source limitation of On‐trees. Bunch removal and bunch thinning by removing the source–sink limitation had the greatest effect on increasing yield components and fruit size, respectively. To improve the quality and quantity of fruit, it is important to use both thinning techniques simultaneously. © 2023 Society of Chemical Industry.

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“…54 Source-sink limitation olives also differ in leaf carbohydrate and mineral content. 12,55,56 It follows that carbohydrates play a crucial role in source-sink limitation.…”

Section: Discussionmentioning

confidence: 99%

Reducing the sink/source ratio of on‐date palm plants during fruit growth has physiological and biochemical impacts on the shift in source–sink limitations

Alikhani-Koupaei¹,

Nia

2023

J Sci Food Agric

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“…Experiments were conducted to determine whether changing nutrient concentrations helped to induce Eichhornia crassipes flowering, and the result demonstrated that very low nutrient concentration conditions induced inflorescence formation [7], which reconfirmed the conclusion of Richards [8]. High soluble sugar content promoted S. tonkinensis flowering [9], while it was the opposite for olive [10]. Starch is one of the nutrients that may be converted into soluble sugar to meet the need for metabolic energy during the process of flower bud differentiation [9].…”

Section: Introductionmentioning

confidence: 90%

A Study on Petal Morphological and Physiological Characteristics of Styrax japonicus during the Flowering Period

Chen

Hong

et al. 2021

Agronomy

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Styrax japonicus is a small ornamental tree with medicinal values, although its flowering period is short. To date, information about the morphological and physiological characteristics of the petals during the flowering period is limited. In this study, we observed the structure of the petals at the full flowering stage with a scanning electron microscope and detected the contents of nutrients, minerals, and endogenous hormones and the activities of enzymes at different flowering stages. The results showed that the content of soluble sugar exhibited an ‘increase-decrease’ trend, whereas the contents of soluble protein, nitrogen (N), phosphorus (P), and abscisic acid (ABA) showed a ‘decrease-increase’ pattern. The content of starch descended continuously, but the contents of potassium (K), gibberellic acid (GA3), indoleacetic acid (IAA), and malondialdehyde (MDA) ascended continuously. The activities of peroxidase (POD) and superoxide dismutase (SOD) first rose and then declined during the flowering period. Higher contents of soluble sugar, N, K, and IAA promoted S. japonicus flowering; meanwhile, lower contents of starch, soluble protein, P, and GA3 in addition to the lower activity of SOD might be some of the causes of the short flowering period. This work will serve as the foundation for a scientific technique to utilize the flowers and extend the flowering period in S. japonicus.

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“…'Manzanilla') reported by Rallo and Martin [16] and Ramos [8]. The differences in the amount of flower formation are expected, considering the well-documented alternate bearing behavior of the olive tree, and could relate to competition for assimilates and different inhibitory factors [22][23][24][25]. It is possible that the consistent temporal patterns we observed between ON and OFF trees, in spite of the quantitative differences in budburst percentages (Figures 1 and 3), support the hypothesis of separate controls of flowering level and dormancy release.…”

Section: The Effect Of Tree Bearing Condition On Reproductive Budburstmentioning

confidence: 99%

Olive Bud Dormancy Release Dynamics and Validation of Using Cuttings to Determine Chilling Requirement

Rubio-Valdés

Cabello

Rapoport

et al. 2022

Plants

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Dormancy release dynamics in olive tree (Olea europaea L.) reproductive buds as affected by cold accumulation, tree bearing status, and budburst temperature was studied under natural and controlled conditions, using both cuttings and container- and field-grown plants. The chilling necessary for dormancy release was acquired at different times within the bud population, presenting a progressive pattern of reproductive budburst. Once sufficient chilling is accumulated, 20 °C is a suitable temperature for reproductive budburst, although higher temperature, e.g., 30 °C, during dormancy release can inhibit budburst. While the bearing status of trees determined the amount of return bloom, dormancy release followed a similar pattern for previously bearing and non-bearing trees. Concurrent with investigating budburst factors, the use of shoot cuttings was tested as a method for olive dormancy release studies by contrasting with results from whole trees. It was found it to be valid for studying reproductive budburst, thus providing a useful method to screen chilling requirements in cultivar evaluation and the breeding programs currently ongoing in this species. However, the method was not valid for vegetative budburst, with varying results between cuttings and the whole plant.

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Effect of Light Intensity and Carbohydrate Reserves on Flowering in Olive

Cited by 39 publications

References 5 publications

Reducing the sink/source ratio of on‐date palm plants during fruit growth has physiological and biochemical impacts on the shift in source–sink limitations

Reducing the sink/source ratio of on‐date palm plants during fruit growth has physiological and biochemical impacts on the shift in source–sink limitations

A Study on Petal Morphological and Physiological Characteristics of Styrax japonicus during the Flowering Period

Olive Bud Dormancy Release Dynamics and Validation of Using Cuttings to Determine Chilling Requirement

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