Palynological Studies on Ten Species of Angiosperms from Nepal

Abstract

Palynological studies on ten species of angiosperms family namely Hibiscus rosa-sinensis L. officinale, S. asper, C. japonica, C. officinalis and T. officinale and smooth in L. candidum.The general appearance of the pollen grain is circular in P. axillaries but longer than wide in L.candidum. The circular, echinate, large and triporate pollens seem to be primitive ones and spharoidal, hexaporate features have been regarded as comparatively advanced ones. Polyporate pollens are considered to be secondarily derived. The nature of the pollen grain in these species could be evolutionary significance. The similarities in structure of the pollen grain showed the inter-species relationships among the species and that's why put in same family while the differences in structures showed reasons for them to exist as distinct species. Only one species namely L.candidum from monocot family (Liliaceae) included in this study.

Scanning electron microscopic investigation on Chicory tribe (Compositae) botanical sources and their antimicrobial potential

“…These findings are similar to those of Diez et al (1999). Mallick (2017) defined pollen of Sonchus asper as hexagonal, and echinate hexahedral, which did not agree with our findings. Sonchus oleraceus pollen was found to be spheroidal, prolate, rectangular, and tricoloporate to tetracoloporate (Mazari et al, 2012).…”

Palyno‐morphological attributes of some selected plant species of family Asteraceae from district Dera Ismail Khan, KPK, Pakistan

“…Similarly, the maximum width of colpi was observed in E. echinatus (15 μm) and Our findings were different from the findings of Al-Saadi and Al-Mayah (2012), El-Garf and Osman (2007), Perveen (1999), and Sadeq and Aliwy (2019) (Figure 5). Plant species of Asteraceae family LM and SEM observation shows that A. subulatus, C. arvensis, and L. luteoalbum have echinate pollen (Ahmad et al, 2013;Khan et al, 2020;Mallick, 2017). C. oxycantha have micro-echinate pollen (Masoumi et al, 2019), C. arvense, L. mucronata, and P. lanceolata have echinate-microreticulate pollen (Perveen, 1999), G. maderaspatana, E. annus, S. marianum, and V. encelioides have echinate perforate pollen (Abhivivek, Sharma, and Thakur (2021);El-Garf & Osman, 2007;Ullah et al, 2021), C. prolifera have scabrate type of pollen grain (Meo & Khan, 2003), and E. echinatus have microechinate pollen type (Perveen, 1999;Perveen, Khan, Mansuri, & Tabassum, 2016) (Table 3).…”

Morphological Study of Pollen Grains of Angiosperms

“…The pollen apertures provide the main routes for exchange with the environment and serves as exit point for the pollen tube. Palynological studies on ten species of angiosperms from Nepal have been reported by Karna-Mallick (2017). In another study, Karna-Mallick (2019) studied pollen morphology of 15 species of angiosperms and found that most of the pollen grains are spheroidal and apertures of the pollens are triporate to polyporate.…”