Palyno-morphological attributes of some selected plant species of family Asteraceae from district Dera Ismail Khan, KPK, Pakistan.
Microsc Res Tech
; 85(4): 1392-1409, 2022 Apr.
Article
de En
| MEDLINE
| ID: mdl-34843140
ABSTRACT
The current study aimed to investigate the palyno-morphological features of Asteraceous species from District Dera Ismail Khan, Khyber Pakhtunkhwa, Pakistan. A total of 13 species were collected, pressed, identified, and examined by using light and scanning electron microscopy. Both qualitative and quantitative pollen characters were observed, that is, equatorial and polar diameter, number of pores and colpi, exine thickness, exine sculpturing, pollen shape, and P/E ratio. Pollen shapes observed in studied taxa were spheroidal, suboblate, oblate-spheroidal, and lophate-spheroidal. The aperturation patterns of pollens vary from tricolporate to tetracolporate. The maximum polar and equatorial diameter of 75-100 (87.5 ± 13.6) µm and 87.5-117.5 (102.5 ± 16.4) µm, respectively, was recorded in Echinops echinatus, while minimum polar and equatorial diameter of 20-22.5 (21 ± 1.36) µm and 22.5-25 (23.5 ± 1.36) µm, respectively, was recorded in Aster subulatus. Six types of exine sculpturing patterns were observed; echinate, micro-echinate, echinate-microreticulate, microreticulate, echinate-perforate, and scabrate. Maximum exine thickness of 8.75 µm was recorded in E. echinatus and minimum of 1.25 µm in Launaea mucronata. The pollen morphology has valuable significance in understanding the taxonomy of different plant groups and plays a central role in the correct identification and classification of Asteraceous flora at species, generic, and tribe levels.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Pollen
/
Asteraceae
Type d'étude:
Qualitative_research
Pays/Région comme sujet:
Asia
Langue:
En
Journal:
Microsc Res Tech
Sujet du journal:
DIAGNOSTICO POR IMAGEM
Année:
2022
Type de document:
Article
Pays d'affiliation:
Pakistan