Pollen morphological investigations of family Cactaceae and its taxonomic implication by light microscopy and scanning electron microscopy.

Microscopy Research and Technique
Salman MajeedMunazza Jabeen

Abstract

The family Cactaceae is the diversified group of angiosperm plants whose pollen statistics has been used for taxonomic identification. In this article, we present the pollen morphology of eight species belong to seven taxonomically complex genera of Cactaceae including Astrophytum, Cylindropuntia, Echinocereus, Echinopsis, Mammillaria, Opuntia, and Thelocactus using light and scanning electron microscopy. The pollen grains were acetolyzed, measured, described, and electron photomicrographs were taken. Cactaceae can be characterized by presenting different palynomorphological features including pollen type, sculpturing, polar and equatorial diameter, aperture orientation, exine thickness, P/E ratio, and echini features. Four types of pollen shapes, that is, prolate spheroidal (three species), subprolate (two species), prolate (two species), and oblate spheroidal in Echinocereus reichenbachii were observed. The polar and equatorial diameter observed maximum in O. ficus indica 116.95 and 112.27 μm while minimum in M. compressa 38.42 and 21.05 μm. Pollen of two types, tricolpate in members of subfamily Cactioideae and pantoporate in the Opuntioideae were examined. The fertility percentage has been observed maximum in Opuntia macroc...Continue Reading

References

Apr 23, 2002·Nature Reviews. Genetics·Spencer C H Barrett
Oct 6, 2005·Biological & Pharmaceutical Bulletin·Rubeena SaleemShaheen Faizi
Dec 5, 2014·AoB Plants·Ana NovoaDavid M Richardson
Mar 28, 2018·Microscopy Research and Technique·Fazal UllahAkash Tariq
Sep 17, 2019·PhytoKeys·Catalina Ruiz-DomínguezVictoria Sosa

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