The staminal lever mechanism and floral diversity of some bee-pollinated Salvia L. (Lamiaceae) species

Download

index.pdf

Date

2011

Author

Atalay, Zeynep

Metadata

Show full item record

Item Usage Stats

190
views

64
downloads

The characteristic staminal lever mechanism is defined as a functional unit including the modification of stamens into lever-like structures, their reversible movement and the organisation with the remaining floral structures and they are involved in the process of pollen transfer. The staminal levers play a major role in the process of pollen deposition on the pollinators’ body and their proportion and interaction with pollinators may have significant consequences for the pollination system in Salvia. In this study, staminal lever mechanism and floral diversity of bee pollinated species including Salvia absconditiflora, Salvia aethiopis, Salvia russellii, Salvia tchihatcheffii which grow sympatrically are investigated in the campus flora of Middle East Technical University. The functioning of the staminal lever mechanism is tested and pollinators of the Salvia species are observed by field investigations. Special attention is given to species-specific patterns of pollen deposition on the pollinators’ body. Floral diversity of the Salvia species such as corolla shape, size, colour, stamen type are studied. Floral and pollinator structures are measured morphometrically by laboratory investigations. Moreover, the isolation mechanism among the co-occuring Salvia species are investigated by field observations. All field observations are backed by photos and video recordings. Field and laboratory investigations revealed that co-occuring Salvia species are reproductively isolated by several means and the diversity of floral constructions and staminal lever mechanism increases the mechanical isolation by attracting different pollinators and by loading pollen on different parts of their bodies.

Subject Keywords

Pollination.

URI

http://etd.lib.metu.edu.tr/upload/12613434/index.pdf
https://hdl.handle.net/11511/20695

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Investigation of wheat genes involved in zinc efficiency mechanism using differential display technique Türktaş, Mine; Akkaya, Mahinur S.; Kocabıyık, Semra; Department of Biotechnology (2003) Zinc is a metal involved in structure of many enzymes, in the growth and differentiation of plants. Wheat is one of the most consumed cereals. Some wheat cultivars can̕t deal with zinc deficiency and this situation not only reduces grain yield but also weakens the resistance of cereals to diseases and impairs the nutritional quality of the grain. Some wheat cultivars are not affected by zinc deficiency. In this study, ءdifferential display̕, used for determination differentially expressed genes between two ...
An investigation of the inertial interaction of building structures on shallow foundations with simplified soil-structure interaction analysis methods Eyce, Bora; Bakır, Bahadır Sadık; Department of Civil Engineering (2009) Seismic response of a structure is influenced by the inertial interaction between structure and deformable medium, on which the structure rests, due to flexibility and energy dissipation capability of the surrounding soil. The inertial interaction analyses can be performed by utilizing simplified soil-structure interaction (SSI) analyses methods. In literature, it is noted that varying soil conditions and foundation types can be modeled by using these SSI approaches with springdashpot couples having certain...
Behaviour of pile groups under lateral loads Ercan, Anıl; Erol, Orhan; Department of Civil Engineering (2010) To investigate the lateral load distribution of each pile in a pile group, the bending moment distribution along the pile and the lateral group displacements with respect to pile location in the group, pile spacing, pile diameter and soil stiffness three dimensional finite element analysis were performed on 4x4 pile groups in clay. Different Elatic Modulus values, pile spacings, pile diameters and lateral load levels used in this study. In the analysis PLAXIS 3D Foundation geotechnical finite element packag...
Evaluation of cement mortars by ultrasound Paksoy, Nesibe Gözde; Yaman, İsmail Özgür; Department of Civil Engineering (2006) Ultrasonic testing of concrete is often used for the assessment of its uniformity, strength, modulus of elasticity, durability and etc. therefore, the related parameters of testing such as the transducer frequency, the specimen geometry and etc. are well-known. On the other hand, most of the concrete properties are affected by the cement and the mechanical as well as some durability properties of cements are determined through cement mortars. Applications of ultrasound on determining the properties of cemen...
The behaviour of flow in the immediate vicinity of a sloping rectangular channel with free overfall Kutlu, İhsan; Tiğrek, Şahnaz; Department of Civil Engineering (2005) The flow characteristics of the subcritical and supercritical flows over a free overfall in a rectangular channel are studied experimentally. A series of experiments were conducted in a tilting flume with a wide range of flow rate. Data collected by several researchers are also included. An empirical relationship, which gives the flow rate as a function of the brink depth, the channel bed slope and the bed roughness are confirmed by using data collected in present study. In addition, the behaviors of the ra...

Citation Formats

Z. Atalay, “The staminal lever mechanism and floral diversity of some bee-pollinated Salvia L. (Lamiaceae) species,” M.S. - Master of Science, Middle East Technical University, 2011.