Nectar secretion and pollen production in Hyacinthus orientalis ‘Sky Jacket’ (Asparagaceae)

Bożek, Małgorzata

doi:10.5586/aa.1796

Cited by 8 publications

(7 citation statements)

References 56 publications

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“…Differences in pollen production between growing seasons have frequently been reported for some plant species, which would be related to differences in climatic conditions. Low air temperatures and a deficit in precipitation considerably decrease the amount of pollen produced in flowers (Bożek, 2019), corroborating in the present investigation with the cocoa crop, since in the months when there was less presence of rainfall, it was at the time that there was less production of pollen.…”

Section: Discussionsupporting

confidence: 90%

Pollen Production in Theobroma cacao L. Genotypes National Type and CCN-51 and Its Relationship with Climatic Factors on the Ecuadorian Coast

Cruzatty¹,

Vera-Pinargote²,

Gavilanes³

et al. 2020

Acta Agrobot

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Cocoa is a primary source of economic income in the agricultural and agroindustrial sectors of Ecuador. However, cocoa crops are vulnerable to meteorological conditions that affect reproduction processes, including pollen production, which has encouraged the study of factors related to low crop yields and practical implications in breeding programs. The objective of this study was to assess the pollen production per flower in 11 genotypes of Theobroma cacao national type and CCN-51 clone. The number of pollen grains per flower was estimated by collecting 10 flower buds from each genotype for 12 consecutive months and directly counting pollen grains using an optical microscope and a Neubauer chamber. An average of 32,611 pollen grains per flower was estimated, with the largest amount of pollen (44,000) produced by the CCN-51 genotype. There was a moderate positive correlation between the environmental variables and pollen production (temperature, r = 0.33; p = 0.028; precipitation, r = 0.43; p = 0.0025). Since pollen production is an important indicator used for the selection of promising genotypes, the genotypes identified with the highest pollen production should be used in breeding programs.

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Section: Discussionsupporting

confidence: 90%

Pollen Production in Theobroma cacao L. Genotypes National Type and CCN-51 and Its Relationship with Climatic Factors on the Ecuadorian Coast

Cruzatty¹,

Vera-Pinargote²,

Gavilanes³

et al. 2020

Acta Agrobot

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“…Hence, we can assume that nectary size and visibility do not necessarily correlate with the species, because nectar production strictly depends on phenology and many other factors, including environmental factors (Bożek, 2019;Dmitruk, 2019;Lovett-Doust & Lovett-Doust, 1988;Nicolson et al, 2007). However, in all of the investigated Gagea s.…”

Section: Discussionmentioning

confidence: 98%

Comparative Floral Morphology and Anatomy of Gagea s. str. and Lloydia

Novikov

2021

Acta Agrobot

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Flowers of the five species from the four sections of the genus Gagea (that is, G. lutea , G. pusilla , G. reticulata , G. fragifera , and G. serotina (syn. Lloydia serotina ) were investigated by light microscopy. All investigated species had similar flower organization, vertical zonality of the gynoecium, and floral vascularization. In all species, the flowers were trimerous, with the superior ovary and short complete or semicomplete syntepalous zone at the base. The presence of the syntepalous zone allows consideration of such flowers as an intermediate between hypogynous and perigynous. All investigated species had nectaries at the base of the tepals. However, in Gagea s. str., they were represented by relatively small nectariferous areas of the tepals located at the beginning of the synascidiate zone of the gynoecium. In contrast, the nectaries in G. serotina were represented by elongated tepalar outgrowths located higher, at the level of the fertile symplicate zone of the gynoecium. Considering reports on the potential peltate origin of the nectaries in G. serotina , it is probably incorrect to interpret them as homologous to the nectaries in Gagea s. str. The gynoecium in the studied species demonstrated identical vertical zonality with synascidiate, symplicate, and asymptomatic zones, and corresponded to type C of the syncarpous gynoecium. At the base of the ovary, three carpels were congenitally isolated (primary synascidiate zone); however, they were isolated only postgenitally (secondary synascidiate zone). This secondary synascidiate zone originated from a symplicate zone due to the fusion of the carpelar margins. Although it looks like a synascidiate zone, for correct interpretation of the gynoecium’s vertical structure, it should be considered symplicate. The vascularization of the flower in all investigated species was similar, with the participation of lateral vascular bundles in the supply of placentas.

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“…Our study revealed that total nectar volume of individual A. ursinum plants did not differ significantly between study sites or years; while nectar sugar concentrations of individual flowers differed significantly between sites and years. The quantity of secreted nectar and the sugar concentration of nectar were found to be year-dependent also in Campanula patula [ 13 ] and Hyacinthus orientalis [ 14 ], but in the case of Oenothera species no difference was measured within a species regarding total quantity of nectar production by a flower between years [ 18 ]. Contrary to our results, the study conducted by [ 43 ] on Croton macrostachyus L. revealed that there is a significant difference in the mean nectar volume among study sites, but mean nectar concentration was not significantly different among study sites.…”

Section: Discussionmentioning

confidence: 99%

“…Nectar was collected with the microcapillary method from the base of the ovary. We decided to apply this method, which is one of the standard nectar sampling procedures [ 13 , 14 , 18 , 48 , 49 , 50 ], because it proved to be reliable in our previous studies [ 27 ], and we wanted to compare our results with previous reports that also applied the microcapillary method [ 51 , 52 ]. The solute concentration (as % w / w , consisting almost totally of sugars) was measured using a handheld sugar refractometer ATAGO N-50E, Tokyo, Japan.…”

Section: Methodsmentioning

confidence: 99%

“…A recent study revealed that interactions between mānuka ( Leptospermum scoparium J.R. et G. Forst) cultivars and soils affected plant growth and flowering, and in turn overall nectar yield was influenced by cultivars-soil interaction [ 12 ]. Nectar volume, concentration and sugar composition can also vary between flower developmental stages, floral sexes [ 13 ], flower position in raceme [ 14 ], flower life-span, morphological and phenological characteristics of individual plants [ 7 , 15 , 16 , 17 , 18 ]; and are influenced also by extrinsic factors such as pollinator behavior (frequency and abundance of pollinator visits, the number of flowers visited per plant, the duration of the visit) [ 13 ], presence of nectar robbers, or nectar contamination by yeasts [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Soil Humus, Iron, Sulphate and Magnesium Content Affect Nectar Traits of Wild Garlic (Allium ursinum L.)

Bodó

Farkas

Nagy

et al. 2021

Plants

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Recent studies revealed that from various ecological factors influencing nectar yield and quality of a plant, soil properties can be as important as microclimatic features. To date, few studies have investigated the relationship of soil characters to nectar traits of bee pollinated plants growing in natural associations. Our study intended to reveal which soil properties had the most powerful impact on nectar variables of wild garlic (Allium ursinum L.). Specimens were collected from fourteen habitats in two different years, and were potted in their original soil under the same climatic conditions. Nectar volumes and sugar concentrations were measured and soil samples were analysed for fourteen parameters. Statistical analyses revealed that the number of nectar producing Allium flowers, as well as the nectar volume and sugar content of nectar in individual flowers were influenced by both year and habitat. The humus, iron and sulphate content of soil showed negative correlation with the number of flowers producing nectar; total nectar volumes were negatively correlated with humus and iron content, but positively affected by magnesium content of the soil. Our results suggest that in addition to the effect of microclimatic factors, certain soil properties can have significant impact on nectar traits.

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Nectar secretion and pollen production in Hyacinthus orientalis ‘Sky Jacket’ (Asparagaceae)

Cited by 8 publications

References 56 publications

Pollen Production in Theobroma cacao L. Genotypes National Type and CCN-51 and Its Relationship with Climatic Factors on the Ecuadorian Coast

Pollen Production in Theobroma cacao L. Genotypes National Type and CCN-51 and Its Relationship with Climatic Factors on the Ecuadorian Coast

Comparative Floral Morphology and Anatomy of Gagea s. str. and Lloydia

Soil Humus, Iron, Sulphate and Magnesium Content Affect Nectar Traits of Wild Garlic (Allium ursinum L.)

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