NOTES ON LEAF AND STEM ANATOMY OF Thlaspi sensu lato

Abstract

In this study, anatomical characteristics of leaves and stems of 19 taxa of Thlaspi sensu lato, 9 of which are endemic to Turkey, were investigated in order to determine taxonomic relationships among the studied taxa. The anatomical characteristics of all taxa were determined and assessed using the cluster analysis and the principal component analysis. The transverse sections of the leaves and stems exhibited various diagnostic characters in terms of the pattern of epidermal cell and mesophyll layers, the number and size of vascular bundles, and the thickness of the cortex and endodermis. Important differences were detected in number, size, and index of stomata, and in epidermal cell wall structures in the adaxial and abaxial surfaces. The results showed that the compared anatomical characteristics among taxa are partially compatible with their sectional delimitation in their traditional rank in The Flora of Turkey and the East Aegean Islands. The results also point out that some taxonomic rearrangements may be required. Özet: Bu çalışmada, 9'u Türkiye için endemik olan 19 Thlaspi sensu lato taksonunun yaprak ve gövde anatomik karakterleri, taksonlar arasındaki taksonomik ilişkileri belirleme amacıyla tanımlanmıştır. Tüm taksonların anatomik karakterleri belirlendi ve kümeleme analizi ve temel bileşen analizi kullanılarak değerlendirildi. Yaprakların ve gövdelerin enine kesitleri epidermal hücre ve mezofil tabakalarının yapıları, vasküler demetlerin sayısı ve boyutu, korteks ve endodermisin kalınlığı açısından çeşitli teşhis karakterleri gösterdi. Ayrıca, adaksiyal ve abaksiyal yüzeylerde stomaların sayı, boyut ve indeksinde ve epidermal hücre duvarı yapılarında önemli farklılıklar saptandı. Bu sonuçlar taksonlar arasındaki karşılaştırılmış anatomik özelliklerin Türkiye Florası ve Doğu Ege Adaları'ndaki geleneksel sıralamasındaki seksiyon sınırlamaları ile kısmen uyumlu olduğunu göstermektedir. Elde edilen veriler ayrıca bazı taksonomik yeniden düzenlemelerin gerekli olabileceğine işaret etmektedir.

Comparative anatomy and pollen morphology of two endemic Noccaea species (Brassicaceae) and their taxonomic significance

“…Other anatomical measurements given in Table 1 were similar in the species studied. Metcalfe and Chalk (1957) previously reported that the bifacial mesophyll was the most common in the Brassicaceae family, but in later studies, it was commonly observed in unifacial and equifacial types (Akbar and Begum, 2020;Yılmaz-Çıtak and Dural, 2020;Karaismailoğlu and Erol, 2020).…”

“…Çitak and Dural (2020) investigated anatomy of the vegetative and reproductive parts of Turkish Iberis L. species. Karaismailoğlu (2020) investigated in detail the petiole anatomy of 21 representatives of the Alysseae tribe. Karaismailoğlu and Erol (2020) studied anatomical characteristics of stems and leaves of 19 taxa of Thlaspi sensu lato.…”

“…Karaismailoğlu (2020) investigated in detail the petiole anatomy of 21 representatives of the Alysseae tribe. Karaismailoğlu and Erol (2020) studied anatomical characteristics of stems and leaves of 19 taxa of Thlaspi sensu lato. Mohamed et al (2021) studied the flower anatomy of some Brassicaceae species.…”

Alyssum strigosum s.l. (Brassicaceae)’un Morfolojik, Anatomik ve Palinolojik Özellikleri

“…The observations and investigation of the stem cross-sections showed that most of species were characterised by vascular bundles that were placed and arranged in a ring. The leaf anatomy has been used to characterise tribes and some genera in the family Brassicaceae (Orcan and Binzet, 2003;Selvi and Paksoy, 2013;Çıtak and Dural, 2020;Karaismailoğlu, 2019b;Karaismailoğlu and Erol, 2020;Karaismailoğlu and Şirin, 2020;Yıldırım et al 2021). In the present study, the equifacial leaves were observed in the studied species, which were declared in a previous study (Orcan and Binzet, 2003) and were generally characteristic of xerophytic plants, according to Yentür (2003).…”

Thlaspi harungalipii (Brassicaceae), Türkiye'den Yeni Bir Tür

“…Al-Shehbaz (2014) performed a synopsis of the genus Noccaea having transferred many Thlaspi taxa to this genus. However, successive comprehensive studies on the genus in Turkey including morphological, anatomical, palynological, cytological and molecular data have showed that taxa in the sections Nomisma, Thlaspi and Pterotropis should be considered under the genus Thlaspi (Karaismailoğlu, 2018;Karaismailoğlu & Erol, 2018;Karaismailoğlu & Erol, 2019;Karaismailoğlu & Erol, 2020;Karaismailoğlu & Fidan, 2021;Karaismailoğlu et al, 2022).…”