Molecular (ISSR, cp DNA, ITS) and morphological study of the genus Tragopogon L. (Asteraceae)

Abstract

Tragopogon L. (Cichorioideae, Lactuceae, Scorzonerinae) is an Old World genus with 150 species, Rechinger in Flora Iranica divided this genus in 13 section and 37 species that 26 species of them are exist in Iran. Safavi et al. divided it into 26 species without sections in flora Iran. Despite the anatomical and molecular studies done around the world, the exact classification of this genus is not clear due to the high number of secret species, hybridization, polyploidy and rapid diversification. The morphology studies of 32 species and Molecular studies (ISSR, ITS, cp DNA) of 22 species of the genus Tragopogon was investigated. The purpose of these studies are classification and determination of interspecific relationship in this genus. Sections of Rubriflori, Sosnowskya, Chromopappus, Majores, Angustissimi, Krascheninnikovia in flora of Iranica are confirmed on the basis of morphometry and molecular data. Section of Profundisulcati in flora Iranica is confirmed on the base of morphometry data. The Species of T. jesdianus, T. porphyrocephalus, T. rezaiyensis and T. Stroterocarpus in the flora of Iranica are not classified in any section which we classified in the Rubriflori section, Cp DNA dendrogram are not useful for classification in this genus and Chloroplast sequences are very similar among Tragopogon species, Therefore, the use of cp DNA markers in the classification of this genus is not recommended.

Scanning electron microscopic investigation onChicorytribe (Compositae) botanical sources and their antimicrobial potential

“…Wagenitz (1976) identified three evolution processes in the Asteraceae: spines reduction, absence of inner columellae, and formation of surface ridges (lophate or fenestrate pollen). The genus Tragopogon generally has trizonocolporate pollen grains, but dizonocolporate and tetrazonocolporate pollen grains were also reported by Azizi et al (2022). According to ITS data, the species Tragopogon porphyrocephalus, T. stroterocarpus , and T. jesdianus belong to the Rubriflori section, which is aligned with the pollen statistics of Azizi et al (2021).…”