The evolution of pollen heteromorphism inViola: A phylogenetic approach

2000 ◽  
Vol 223 (3-4) ◽  
pp. 155-171 ◽  
Author(s):  
S. Nadot ◽  
H. E. Ballard ◽  
J. B. Creach ◽  
I. Dajoz
Keyword(s):  
Pollen Heteromorphism

scholarly journals Variability of pollen aperture heteromorphism in annual pansies (Viola Section Melanium)

2015 ◽  
Vol 74 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Sara Magrini ◽  
Anna Scoppola
Keyword(s):  
Pollen Grains ◽  
Perennial Species ◽  
Pollen Assemblage ◽  
Significant Variability ◽  
Pollen Types ◽  
Pollen Heteromorphism

Abstract Pollen heteromorphism is frequent in the section Melanium of the genus Viola, in which over 80% of the species produces pollen morphs with 3 to 6 apertures. Some authors have pointed out that many factors can affect the proportion of the different pollen types in perennial species, and that this proportion can change among populations. This work focuses on the study of the polymorphic pollen assemblage of three annual pansies: Viola arvensis, V. kitaibeliana, and V. hymettia, and on the assessment of its variability both within a population and within the same plant. In all the species, with both large and small flowers, 3-, 4- and 5-aperturate pollen grains were observed, with a large prevalence of 4-aperturate types. No pollen grains with 6 apertures were found. No significant variability of the pollen assemblage among flowers of the same plant was observed. In addition, in these three Viola species the frequencies of the various pollen morphs are also fairly constant among plants of the same population.

scholarly journals Pollen heteromorphism in Schleichera Lour. (Sapindaceae), observed in surface soil samples from central India

2021 ◽  
Vol 61 (1) ◽  
pp. 32-41
Author(s):  
Md. Firoze Quamar ◽  
Biswajeet Thakur ◽  
Veeru Kant Singh ◽  
Santosh Kumar Pandey
Keyword(s):  
Laser Scanning ◽  
Surface Soil ◽  
Pollen Grains ◽  
Central India ◽  
Soil Samples ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Pollen Heteromorphism ◽  
C Value ◽  
First Time

Angiosperms display striking variation of pollen morphological features within and between populations of the same species, as well as within individual plants. We describe and illustrate variation of pollen aperture number, which is called pollen heteromorphism, in Schleichera Lour. (Sapindaceae) from surface soil samples collected from central India, based on combined observations from light microscopy (LM) and confocal laser scanning microscopy (CLSM). Tri-zono-parasyncolporoidate pollen grains are, in general, known to occur in Schleichera Lour., but occasional tetra-zono-parasyncolporoidate pollen is also recorded, for the first time, from Chhattisgarh State, central India. Changes in ploidy level (diploidy/polyploidy), chromosome number, the C-value of DNA, completion of meiosis, as well as environmental factors and/or pollination ecology could be driving the occurrence of pollen heteromorphism. The present study could provide insights into the phylogeny and systematics, and has implications for pollen preservation as well.

Pollen heteromorphism in Panax ginseng C.A. Meyer (Araliaceae) anthers

2007 ◽  
Vol 412 (1) ◽  
pp. 76-78 ◽  
Author(s):  
G. D. Reunova ◽  
A. A. Reunov ◽  
Ya. N. Aleksandrova ◽  
T. I. Muzarok ◽  
Yu. N. Zhuravlev
Keyword(s):  
Panax Ginseng ◽  
Pollen Heteromorphism

Lack of correlation between pollen aperture number and environmental factors in pansies (ViolaL., sect.MelaniumGing.) - pollen heteromorphism re-examined

Plant Biology ◽  
2018 ◽  
Vol 20 (3) ◽  
pp. 555-562 ◽  
Author(s):  
A. Słomka ◽  
J. Żabicka ◽  
L. Shuka ◽  
J. Bohdanowicz ◽  
E. Kuta
Keyword(s):  
Environmental Factors ◽  
Pollen Heteromorphism
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