Comparison of phenological, aerobiological and melissopalynological patterns of Olea europaea

Dimou, Maria

doi:10.1007/s13592-011-0100-2

Cited by 10 publications

(2 citation statements)

References 87 publications

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“…Climatic conditions are the greatest determining factor for olive cultivation [5], mainly temperature, precipitation and relative humidity, variables that directly condition the phenological response of the tree [1,[5][6][7]. Phenological studies allowed us to know the periodical rhythms of biological events and their relationships with the environment [8]. The onset of phenological events in arboreal plants is more closely related to thermal time rather than to calendar time [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…To survive periods of adverse climatic conditions, the growth of woody plants in temperate regions slows down, entering into a physiological state known as "dormancy" [10] in which the cell water is prevented from freezing [12]. The release of floral bud dormancy occurs when olive trees have been exposed to chilling temperatures for a sufficient time depending on the biogeographic area [8,11]. Once this chilling is fulfilled, certain amounts of heat-thermal units are required for the correct development of inflorescence [13].…”

Section: Introductionmentioning

confidence: 99%

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Reproductive Biology of Olive Trees (Arbequina cultivar) at the Northern Limit of Their Distribution Areas

Garrido

Fernández-González

Vázquez‐Ruiz

et al. 2021

Forests

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In recent years, North-western Spain has experienced an increase in the cultivated area of olive trees. The main propitious areas for olive groves are the Miño and Sil basins, as a consequence of their Oceanic climate with Mediterranean influence. The objective of this study is to determine the characteristics of reproductive biology, phenological and aerobiological behaviour of olive trees in the most northerly new plantation areas of the Iberian Peninsula. The study was carried out in an olive grove growing Olea europaea L. cv. ‘Arbequina’ located in Quiroga (Lugo) from 2016 to 2018. The phenological observations were based upon the main growth stages following the Biologische Bundesanstalt Bundessortenamt and Chemical industry (BBCH) scale. To predict the onset of flowering, a thermal time model was used in order to quantify the chill requirements, and growing degree-days were applied to determine the heat requirement. The production, viability and germination rates of Olea pollen were evaluated from samples selected in nine individual trees for the phenological survey. The aerobiological study was conducted by means of a Hirst-type pollen trap located in the centre of the olive grove. The vegetative period of the olive tree in the study area lasted an average of 259 days. The important phenological stage 6 (flowering) was the shortest stage. An average of 704 Chilling Hours (CH) with a threshold of 2.5 °C was required to overcome the chilling period, 1139 Growing Degree Days (GDD) for the beginning of flowering, and 4463 GDD for harvest. The pollen production per anther was 82589 grains (± 14084 pollen grains), with a rate of 81% viability and 12% pollen tube germination. The main pollen season started on average on May 20th and ended on June 16th with an average duration of 27 days and an annual pollen integral of 833 pollen grains. The low pollen concentrations could be a consequence of the Northern location of the forest, in a bioclimatic transition zone between the Eurosiberian and the Mediterranean areas, at the limit of olive tree distribution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reproductive Biology of Olive Trees (Arbequina cultivar) at the Northern Limit of Their Distribution Areas

Garrido

Fernández-González

Vázquez‐Ruiz

et al. 2021

Forests

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Heat accumulation period in the Mediterranean region: phenological response of the olive in different climate areas (Spain, Italy and Tunisia)

et al. 2013

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The main characteristics of the heat accumulation period and the possible existence of different types of biological response to the environment in different populations of olive through the Mediterranean region have been evaluated. Chilling curves to determine the start date of the heat accumulation period were constructed and evaluated. The results allow us to conclude that the northern olive populations have the greatest heat requirements for the development of their floral buds, and they need a period of time longer than olives in others areas to completely satisfy their biothermic requirements. The olive trees located in the warmest winter areas have a faster transition from endogenous to exogenous inhibition once the peak of chilling is met, and they show more rapid floral development. The lower heat requirements are due to better adaptation to warmer regions. Both the threshold temperature and the peak of flowering date are closely related to latitude. Different types of biological responses of olives to the environment were found. The adaptive capacity shown by the olive tree should be considered as a useful tool with which to study the effects of global climatic change on agro-ecosystems.

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Applied palynology as a trans-disciplinary science: the contribution of aerobiology data to forensic and palaeoenvironmental issues

Mercuri

2015

Aerobiologia

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The paper provides examples of integrated researches putting aerobiology at the centre of methodological approaches of applied palynology. Data from airborne pollen monitoring have demonstrated to be useful to obtain inferences about different environmental issues. For example, seasonality is fruitfully investigated with the help of pollen calendars. The close connection that may exist between aerobiology and forensic palynology is demonstrated by a study on airborne pollen with cytoplasm trapped by corpses; pollen calendars may be a reference tool for establishing the season of death in case of murders or other crimes. Palaeoclimate research can obtain fruitful information from studies on long- distance transport and the comparison of past spectra with the representativeness of pollen in modern spectra. Modern pollen monitoring suggests that the long- distance transport may be a routine (as Alnus viridis in the southern Po Valley) or an episodic event; the very local geomorphological and phytogeographical peculiarities of a given area must be known to interpret pollen spectra. The pollen produced by trees that have had a fundamental importance in our cultural development (Prunus, Olea and Castanea) is among the most interesting archaeobotanical topic to understand the relationship between humans and environmental resources. Sometimes, data cannot be compared because yearly sums and percentages of one taxon on the total pollen counts are not commonly reported in the aerobiological literature. Finally, the decline in Taxus pollen in a warming climate is reported among the case studies that illustrate the relevance of the aerobiological research to interpret past climate records and to study long- term climate changes

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Comparison of phenological, aerobiological and melissopalynological patterns of Olea europaea

Cited by 10 publications

References 87 publications

Reproductive Biology of Olive Trees (Arbequina cultivar) at the Northern Limit of Their Distribution Areas

Reproductive Biology of Olive Trees (Arbequina cultivar) at the Northern Limit of Their Distribution Areas

Heat accumulation period in the Mediterranean region: phenological response of the olive in different climate areas (Spain, Italy and Tunisia)

Applied palynology as a trans-disciplinary science: the contribution of aerobiology data to forensic and palaeoenvironmental issues

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