Pollen viability of Euro‐Mediterranean orchids under different storage conditions: The possible effects of climate change

Pellegrino, Giuseppe; Mahmoudi, Maher; Palermo, Anna Maria

doi:10.1111/plb.13185

Cited by 1 publication

(3 citation statements)

References 56 publications

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“…The effects of rising temperatures have a marginal effect on bending movements compared to the effects observed concerning the viability of the pollen [ 17 ]. Certainly, the lack of pollen germination has consequences that are more drastic than the effects of a reduction in bending time on reproductive success.…”

Section: Discussionmentioning

confidence: 99%

“…In the first case, we have a reduction in the reproductive success of the plant, in the second, only a reduction in the percentage of cross-pollination. Therefore, an increase in temperature significantly reduces pollen viability [ 17 ], but it has no dangerous effects on bending.…”

Section: Discussionmentioning

confidence: 99%

“…In the last few decades, much attention has been paid to the impact of climate change on orchid biology. It has been shown that an increase in temperature has a strong influence on orchid distribution, reducing the availability of suitable habitats [ 15 , 16 ], and on pollen viability duration, reducing the viability of pollen and consequently, the reproductive success of the plants [ 17 ]. The objectives of this study were to expand upon the current information concerning the pollinaria reconfiguration mechanism of widespread Euro-Mediterranean orchids; investigate the effects of increasing air temperature on pollinaria reconfiguration time; collect observations of orchid pollinators and their foraging behaviors on inflorescences with particular attention to the permanence times of the insect on the flower.…”

Section: Introductionmentioning

confidence: 99%

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Pollinaria Reconfiguration Mechanism of Widespread Euro-Mediterranean Orchids: The Effects of Increasing Air Temperature

Lanzino

Palermo

Pellegrino

2022

Plants

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Orchids are fascinating for many reasons: their reproductive strategies, their pollination systems and the various morphological adaptations they have evolved, including the presence of pollen grains agglomerated into two masses, called pollinia, which form a structure known as a pollinarium. After withdrawal from a flower, the pollinarium undergoes a bending movement such that the pollen masses become correctly orientated to strike the stigma. We evaluated the duration of pollinator visits to inflorescences and the effects of temperature on pollinaria reconfiguration in eight orchid species in order to analyze the effects of increasing air temperature on the changes in bending time, and thus on geitonogamy levels. The impact of temperature on insect behavior was not assessed because our priority was to understand the effects of temperature on the process of pollinaria reconfiguration. All the examined species showed natural reconfiguration times that were 1.7–3.0 times longer than the pollinator residency times. A higher temperature showed a reduction in bending time regardless of the species tested. However, the bending time was never shorter than the residence time of the insects on the flower. Our data showed that high temperatures had a limited effect on the pollinarium reconfiguration time, thus indicating that high temperatures had a limited effect on folding compared to the effect that it had on the viability of the pollen.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%