Development of the Stigmatic Surface of Prunus avium L., Sweet Cherry

Uwate, W. J.; Lin, J.Y.

doi:10.2307/2443038

Cited by 12 publications

(2 citation statements)

References 7 publications

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“…The presence of stigma exudate at the onset of anthesis is an indication of pistil receptivity at this time (Uwate and Lin 1981;Herrero and Arbeloa 1989). As the anthers are still turgid and intact at this stage, this means that olive stigmas become receptive before the anthers of the same flower have dehisced to release the pollen grains.…”

Section: Discussionmentioning

confidence: 99%

Structural organization and cytochemical features of the pistil in Olive (Olea europaea L.) cv. Picual at anthesis

et al. 2008

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Pistil structure and composition are critical in recognizing and permitting the germination of suitable pollen grains. We have studied the structure of the different component tissues of the pistil, their organization and cytochemical features of olive flowers, Olea europaea L., at anthesis, an essential first step for understanding the processes of pollen-pistil interaction and fertilization. The pistil from olive cv. Picual trees is characterized by a wet bilobed stigma, a solid style and a bilocular ovary containing four ovules. The stigma is composed of external multicellular papillae and a non-papillate inner region of secretory cells. An exudate is observed on the surface of the papillae at anthesis, the moment when the flowers (first) open, but the anthers are not yet dehiscent. The inner secretory cells of the stigma and those of the stylar transmitting tissue are continuous, constituting a funnel-shaped zone which extends from within the stigma to the style base. The outer surface of the ovary and style epidermis is surrounded by a cuticle layer, while internally, the locule wall, formed by the innermost cells of the endocarp, consists of two layers of periclinally oriented cells with thicker cell walls. Starch granules are distributed differentially, concentrated most densely in the style (adjacent to the vascular bundles), in the distil region of the ovary, and in the micropylar ends of the ovules. Well-developed vascular bundles are present in the lower part of the stigma, the style and in the pericarp of the ovary. The histochemical identification of sugars and lipid substances within and around the vascular bundles suggests that they are involved in the transport of these materials. Ultrastructural observations confirm the presence of exudates on the papillar surface and confirm the secretory characteristics of the inner stigmatic cells. They also demonstrate marked differences in size, form, and vacuolar and cytoplasmic contents among the cells of the various style and upper ovary tissues. We provide the first detailed cytological description at anthesis of all the olive pistil tissues, indicating the structural and cytochemical basis for the pistil behavior which will transpire during the progamic phase.

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Section: Discussionmentioning

confidence: 99%

Structural organization and cytochemical features of the pistil in Olive (Olea europaea L.) cv. Picual at anthesis

et al. 2008

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“…Trees flower in April/May and are insect-pollinated, mostly by bees (Uwate and Lin 1981;Hecker 2001;Conrad 2002). The fruiting period of P. avium lasts from June to August (Hecker 2001;Conrad 2002; personal observation).…”

Section: Study Speciesmentioning

confidence: 99%

Bird diversity and seed dispersal along a human land-use gradient: high seed removal in structurally simple farmland

et al. 2010

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Only few studies have analysed the relationship between biodiversity and ecosystem function at the landscape scale although relationships and mechanisms known from experimental studies might be different in natural systems. We quantified bird diversity and seed removal from 38 wild cherry trees (Prunus avium) along a human land-use gradient from forest to structurally diverse to simple agricultural systems. High human land-use intensity led to low species richness and total abundance of the local bird community around wild cherry trees, as expected from previous studies. Nevertheless, trees in structurally simple agroecosystems were visited as frequently as trees in structurally complex landscapes and in forests. Furthermore, the number of seeds removed per tree did not decline with increasing human land-use intensity. Thus, ecosystem function was robust in spite of locally reduced bird diversity. The reason might be that movement behaviour and movement distances of birds changed along the human land-use gradient. It appears that birds moved longer distances to forage in fruiting cherry trees in structurally simple agroecosystems. This suggests that for systems where ecosystem function is mediated by highly mobile organisms, movement behaviour and distances are of considerable importance. Increases in movement distances with increasing human land-use intensity might also be common in other systems in which ecosystem function depends on mobile links.

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Flowering of Deciduous Perennial Fruit Crops

Sedgley¹

1990

Horticultural Reviews

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Development of the Stigmatic Surface of Prunus avium L., Sweet Cherry

Cited by 12 publications

References 7 publications

Structural organization and cytochemical features of the pistil in Olive (Olea europaea L.) cv. Picual at anthesis

Structural organization and cytochemical features of the pistil in Olive (Olea europaea L.) cv. Picual at anthesis

Bird diversity and seed dispersal along a human land-use gradient: high seed removal in structurally simple farmland

Flowering of Deciduous Perennial Fruit Crops

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