TAILIEUCHUNG - Contributions to the pollen morphology of the family compositae

The pollen morphology of 24 species of Compositae belonging to 18 genera was examined by light and scanning microscopy. The present data confirms the eurypalynous nature of the family. Delimitation of the genera on the basis of pollen characters is less marked. Pollen grains usually radially symmetrical, isopolar rarely apolar, tricolporate, often porate. | Tr. J. of Biology 23 (1999) 523–535 © TÜBİTAK Contributions to the Pollen morphology of the family Compositae Anjum PERVEEN Department of Botany, University of Karachi, Karachi-PAKİSTAN Received: Abstract: The pollen morphology of 24 species of Compositae belonging to 18 genera was examined by light and scanning microscopy. The present data confirms the eurypalynous nature of the family. Delimitation of the genera on the basis of pollen characters is less marked. Pollen grains usually radially symmetrical, isopolar rarely apolar; tricolporate, often porate. Shape commonly oblatespheroidal to prolate-spheroidal, with some suboblate to subprolate types. Tectum echinate to echinolophate, often non-echinate. Tectum in-between the spines or spinules is sub-psilate, or perforated to striate. On the basis of the exine pattern, 4 distinct pollen types are recognized viz., Pollen type-I: Dicoma tomentosa, Pollen type-II: Eclipta prostrata, Pollen type-III: Echinops echinatus and Pollen type-IV: Launaea nudicaulis. Within the pollen types, pollen characters are significantly sufficient for characterization of the species. An interesting correlation observed is that the taxa having spiny capitula have a mostly non-echinate or spinulose tectum with very thick exine (7-25 µm). Key Words: Pollen morphology, Compositae, Eurypalynous Compositae Familyasının Pollen Morfolojisine Katkılar Özet: Compositae familyasının 18 sınıfına ait 24 türünde pollen morfolojisi ışık ve scanning elektron mikroskopik olarak incelendi. Elde edilen veriler bu familyanın eurypalynous tabiatında olduğunu destekliyor. Pollen karakterlerine göre bu sınıfın (grubun) sınırları tam olarak belirlenmemiş değil. Pollen tanecikleri genellikle radial olarak simetrik, izopolar, ender olarak da apolar; tricolporate ya da daha sıklıkla porate olduğu görüldü. Formu (yapısı) çoğunlukla oblate-spheroidal’den prolatespheroidal’e kadar değişmekte olup bazen sub-oblate’den sub-prolate tiplere kadar değişen

• Sinh học
• Pollen morphology
• Scanning microscopy
• Eurypalynous nature
• Pollen characters
• Radially symmetrical
• Pollen viability
• Sex ratio
• Different cultivars of litchi
• Germination and their
• Antioxidant activity
• Pollen grains
• Saudi arabian date palm
• Pollen grains morphology
• Phytochemical constituents
• Onobrychis fallax
• Genus Onobrychis
• Scanning electron microscopy
• Onobrychis aequidentata
• Genus Fritillaria L
• Detailed pollen morphological
• Rugulate reticulate
• Psilate perforate
• Oxalis section Alpinae
• Oxalis pollen
• Ubisch bodies
• Orbicule diversity
• Pollen grain morphology
• Hesperis L
• Seed morphology
• Genus Hesperis L
• Scanning electron microscopes
• Light microscopy
• Genus Salvia
• Largest pollen
• Scaligeria DC
• species
• Cluster analysis
• Principle component analysis
• Principal component analysis
• Asian Vigna species
• Genus Vigna
• Subgenus Ceratotropis
• Palynological characters
• Numerical analysis
• Genus Alchemilla L
• Prolate spheroidal
• Genus Seseli L
• Psilate perforate at pole
• Taxonomic significance
• Achillea L
• sect
• Achillea
• Echinate microperforate
• Echinate rugulatemicroperforate in SEM
• Genus Silene from Turkey
• Siphonomorpha Otth
• Lasiostemones Boiss
• Microechinate microperforate
• Astragalus L
• Electron microscopies
• Generally 3 colporate
• Scanning electron microscopy
• Spinulate microperforate
• R
• bulbocodium L
• Mauri var
• crocea
• Baker and var
• leichtliniana
• Agricultural science
• Pollen grain sculpture
• Seed coat characters of 11 taxa of genus Hibiscus
• Vitis vinifera L
• Grape cultivars
• Grape hybrids
• Scorzonera ketzkhovelii Grossh
• Scorzonera tomentosa L
• Pollen grains 3 zonopororate
• Ora circular
• Journal of Botany
• Palynomorphological characteristics
• Equatorial axis
• Flowering phenology and abundance
• Flower morphology
• Iris aphylla
• Floral morphology
• Pollen production
• Ramonda myconi L
• Resurrection plants
• Microreticulate perforate exine
• Auriculate ornamentation
• Genus Origanum L
• General morphology
• Pollen structure
• Chromosome features
• O
• ayliniae
• Tomato Lycopersicon esculentum Mill
• Glycerin gelatin liquid safranin mixture
• Triphenyl tetrazolium chloride
• Morphological structure
• K vitamin
• Pome fruits
• Stone fruits
• Mediterranean fruits
• Scanning electron microscope
• Plant material