Micromorphology of lettuce (Lactuca sativa L.) pollen grains
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
In order to contribute to palynological studies of cultivated plants in Serbia, micromorphological
features of pollen grains of Lactuca sativa L. (Asteraceae) were examined by both, light microscopy
(LM) and scanning electron microscopy (SEM). Morphological parameters, such as grain size and
shape, apertures and exine ornamentation were described. The morphometric data such as length of
polar axis (P), length of equatorial axis (E), P/E ratio, lacunae diameter, echinae size, and thickness
of exine excluding echinae were noted. Pollen grain were found to be isopolar, radially symmetrical,
medium-sized, oblate-spheroidal in shape (P/E = 0.94), sub-circular in equatorial view, and hexagonal
in polar view with straight sides in outline. The length of the polar axis (P) is 32.6 ± 3.7 μm and of the
equatorial diameter (E) 34.8 ± 2.7 μm. The pollen grain is 3-zonocolporate. Each compound aperture
consists of ectoaperture which is a meridionally elongated colpus with rounded ends, and... pore-shaped
endoaperture. Exine ornamentation is echinolophate. Lophate (fenestrate) pollen grains, typical for
Asteraceae, are characterized by number of lacunae that appear as large window-like spaces, a depressed
area lacking ectexine. Each lacuna is surrounded by a system of echinate ridges. Lettuce pollen grains
have 15 lacunae, 3 poral, 6 abporal and 6 paraporal (polar regions are without lacunae, small, reduced
to triradiate ridge). The poral lacuna communicating with adjacent abporal lacunae via interlacunar
gaps is observed rounded in shape. Paraporal lacunae, lying in the mesocolpial region adjacent to one
side of an equatorial ridge, are pentagonal. Abporal lacunae are rounded or angular, broad towards the
pole. Average lacuna diameter is 10.8 ± 2.5 μm. Lophae (ridges) are with one row of echines that are
1.9 ± 0.3 μm long, pointed and some are curved. The еctexine thickness excluding echines, measured
under LM, averaged 5.7 ± 0.7 µm.
Кључне речи:
Asteraceae / pollen / LM / SEMИзвор:
XI Симпозијум сa међунaродним учешћем "Иновaције у рaтaрској и повртaрској производњи", 2023, 90-91Издавач:
- University of Belgrade, Faculty of Agriculture, Serbia
Институција/група
Poljoprivredni fakultetTY - CONF AU - Mačukanović-Jocić, Marina AU - Rančić, Dragana AU - Terzić, Maja PY - 2023 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/6769 AB - In order to contribute to palynological studies of cultivated plants in Serbia, micromorphological features of pollen grains of Lactuca sativa L. (Asteraceae) were examined by both, light microscopy (LM) and scanning electron microscopy (SEM). Morphological parameters, such as grain size and shape, apertures and exine ornamentation were described. The morphometric data such as length of polar axis (P), length of equatorial axis (E), P/E ratio, lacunae diameter, echinae size, and thickness of exine excluding echinae were noted. Pollen grain were found to be isopolar, radially symmetrical, medium-sized, oblate-spheroidal in shape (P/E = 0.94), sub-circular in equatorial view, and hexagonal in polar view with straight sides in outline. The length of the polar axis (P) is 32.6 ± 3.7 μm and of the equatorial diameter (E) 34.8 ± 2.7 μm. The pollen grain is 3-zonocolporate. Each compound aperture consists of ectoaperture which is a meridionally elongated colpus with rounded ends, and pore-shaped endoaperture. Exine ornamentation is echinolophate. Lophate (fenestrate) pollen grains, typical for Asteraceae, are characterized by number of lacunae that appear as large window-like spaces, a depressed area lacking ectexine. Each lacuna is surrounded by a system of echinate ridges. Lettuce pollen grains have 15 lacunae, 3 poral, 6 abporal and 6 paraporal (polar regions are without lacunae, small, reduced to triradiate ridge). The poral lacuna communicating with adjacent abporal lacunae via interlacunar gaps is observed rounded in shape. Paraporal lacunae, lying in the mesocolpial region adjacent to one side of an equatorial ridge, are pentagonal. Abporal lacunae are rounded or angular, broad towards the pole. Average lacuna diameter is 10.8 ± 2.5 μm. Lophae (ridges) are with one row of echines that are 1.9 ± 0.3 μm long, pointed and some are curved. The еctexine thickness excluding echines, measured under LM, averaged 5.7 ± 0.7 µm. PB - University of Belgrade, Faculty of Agriculture, Serbia C3 - XI Симпозијум сa међунaродним учешћем "Иновaције у рaтaрској и повртaрској производњи" T1 - Micromorphology of lettuce (Lactuca sativa L.) pollen grains EP - 91 SP - 90 UR - https://hdl.handle.net/21.15107/rcub_agrospace_6769 ER -
@conference{ author = "Mačukanović-Jocić, Marina and Rančić, Dragana and Terzić, Maja", year = "2023", abstract = "In order to contribute to palynological studies of cultivated plants in Serbia, micromorphological features of pollen grains of Lactuca sativa L. (Asteraceae) were examined by both, light microscopy (LM) and scanning electron microscopy (SEM). Morphological parameters, such as grain size and shape, apertures and exine ornamentation were described. The morphometric data such as length of polar axis (P), length of equatorial axis (E), P/E ratio, lacunae diameter, echinae size, and thickness of exine excluding echinae were noted. Pollen grain were found to be isopolar, radially symmetrical, medium-sized, oblate-spheroidal in shape (P/E = 0.94), sub-circular in equatorial view, and hexagonal in polar view with straight sides in outline. The length of the polar axis (P) is 32.6 ± 3.7 μm and of the equatorial diameter (E) 34.8 ± 2.7 μm. The pollen grain is 3-zonocolporate. Each compound aperture consists of ectoaperture which is a meridionally elongated colpus with rounded ends, and pore-shaped endoaperture. Exine ornamentation is echinolophate. Lophate (fenestrate) pollen grains, typical for Asteraceae, are characterized by number of lacunae that appear as large window-like spaces, a depressed area lacking ectexine. Each lacuna is surrounded by a system of echinate ridges. Lettuce pollen grains have 15 lacunae, 3 poral, 6 abporal and 6 paraporal (polar regions are without lacunae, small, reduced to triradiate ridge). The poral lacuna communicating with adjacent abporal lacunae via interlacunar gaps is observed rounded in shape. Paraporal lacunae, lying in the mesocolpial region adjacent to one side of an equatorial ridge, are pentagonal. Abporal lacunae are rounded or angular, broad towards the pole. Average lacuna diameter is 10.8 ± 2.5 μm. Lophae (ridges) are with one row of echines that are 1.9 ± 0.3 μm long, pointed and some are curved. The еctexine thickness excluding echines, measured under LM, averaged 5.7 ± 0.7 µm.", publisher = "University of Belgrade, Faculty of Agriculture, Serbia", journal = "XI Симпозијум сa међунaродним учешћем "Иновaције у рaтaрској и повртaрској производњи"", title = "Micromorphology of lettuce (Lactuca sativa L.) pollen grains", pages = "91-90", url = "https://hdl.handle.net/21.15107/rcub_agrospace_6769" }
Mačukanović-Jocić, M., Rančić, D.,& Terzić, M.. (2023). Micromorphology of lettuce (Lactuca sativa L.) pollen grains. in XI Симпозијум сa међунaродним учешћем "Иновaције у рaтaрској и повртaрској производњи" University of Belgrade, Faculty of Agriculture, Serbia., 90-91. https://hdl.handle.net/21.15107/rcub_agrospace_6769
Mačukanović-Jocić M, Rančić D, Terzić M. Micromorphology of lettuce (Lactuca sativa L.) pollen grains. in XI Симпозијум сa међунaродним учешћем "Иновaције у рaтaрској и повртaрској производњи". 2023;:90-91. https://hdl.handle.net/21.15107/rcub_agrospace_6769 .
Mačukanović-Jocić, Marina, Rančić, Dragana, Terzić, Maja, "Micromorphology of lettuce (Lactuca sativa L.) pollen grains" in XI Симпозијум сa међунaродним учешћем "Иновaције у рaтaрској и повртaрској производњи" (2023):90-91, https://hdl.handle.net/21.15107/rcub_agrospace_6769 .