The taxonomic implication of leaf anatomy in tribe Sorbarieae (Spiraeoideae: Rosaceae)

Abstract

A comparative study of leaf anatomy in tribe Sorbarieae (Adenostoma, Chamaebatiaria, Sorbaria, Spiraeanthus) including one related genus Lyonothamnus was carried out using light microscopy. Anatomical characteristics of the leaf blade and midrib were described and taxonomically evaluated. The anatomical characters which described in this study are as follows: thickness of leaf midrib, blade in cross section, cuticle, epidermal cell, stoma, trichome, mesophyll, crystal, main vasculature type. All features were compared and the vascular patterns of midrib were distinguished two types.-Type 1: Trace tripartite (Adenostoma), Type 2: Trace continuous, subtype 2A: flat arc (Chamaebatiaria, Spiraeanthus), subtype 2B: U-shape arc (Lyonothamnus, Sorbaria). In conclusion, some of leaf anatomical characters (e.g., cuticle, epidermal cell, trichome, mesophyll, main vasculature type) can be useful for diagnostic features. Hypostomatic type, dorsiventral mesophyll, Ushape vasculature type would constitute a major characters for genus Sorbaria in Sorbarieae. The detailed anatomical description of studied taxa is provided, and its systematic importance is also briefly discussed.

Comparative petiole anatomy of the tribe Sorbarieae (Rosaceae) provide new taxonomically informative characters

“…Adenostoma and Lyonothamnus have well-developed cuticles (3.0-10.0 μm), in contrast to the other genera studied (0.2-4.0 μm). This difference is consistent with the leaf anatomical data (Song and Hong 2014). A thick cuticle is usually related to environmental factors, since its main function is in preventing water loss (Almeida et al 2013).…”

“…Therefore, Sorbarieae requires comprehensive taxonomic and systematic investigation. Our previous studies revealed various characteristics that have systematic and taxonomic significance within the Sorbarieae sensu Potter et al (2007), such as leaf anatomy (Song and Hong 2014), leaf epidermal micromorphology (Song and Hong 2016a), petal micromorphology (Song and Hong 2016b), and palynology (Song et al 2016). These results encouraged us to investigate other characteristics to enhance our understanding of the phylogenetic relationships and evolution of characteristics within the Sorbarieae, which is a well-supported monophyletic group within the Spiraeoideae (Potter et al 2007).…”

“…Rahn (1989) treated Sorbaria rhoifolia as a synonym of S. grandiflora. Recent character studies of the Sorbarieae have shown that there are no significant differences in leaf anatomy (Song and Hong 2014), pollen morphology (Song et al 2016), leaf micromorphology (Song and Hong 2016a), and petal micromorphology (Song and Hong 2016b) between them. In the present study, S. grandiflora and S. rhoifolia had similar characteristics, such as crystal densities and trichome characteristics.…”

“…The goals of the present study were to 1) document comprehensive petiolar anatomical data from the proximal, medial, and distal regions; 2) identify useful characters by describing the petiole anatomy of the tribe Sorbarieae and provide an identification key; and 3) investigate structural changes in the vascular supply from the stem-leaf transitional zone to the leaf medial zone by comparing recently published leaf anatomical data relevant for this tribe (Song and Hong 2014).…”

A Study on the Petal Micromorphological Characteristics of the Tribe Sorbarieae (Rosaceae)

“…한편, 수과 의 열매를 갖는 특징으로 과거 독립된 Adenostomeae족으로 인 식되었던 Adenostoma속이 Chamaebatiaria속, Sorbaria속, Spiraeanthus속과 함께 높은 지지율로 단계통군을 이루어 쉬 땅나무족이 다른 족들과 구분되는 독립된 족임이 밝혀졌다 (Potter et al, 2007). 한편, 쉬땅나무족의 형태학적 형질은 잎 의 해부학적 연구와 (Song and Hong, 2014), 미세형태학적 연구 , 화분의 형태학적 연구 (Song et al, sorbifolia var. glandulosa Nakai), 청쉬땅나무(S. sorbifolia for.…”