Taxonomic significance of the leaf micromorphology in the tribe Sorbarieae (Spiraeoideae: Rosaceae)

Jun-Ho Song, Suk-Pyo Hong
2016 Korean Journal of Plant Taxonomy  
␉ᔼᯪμ+λྐྵᯪ)௯=#˔᳇௯,#ʻᄡሞ ᳇⊬ጏലሽ̿#ጏԽʀ#ẃ᧒ሽ̿#ɀƹ⊥ ᘂᵡΉԂΞᕾƭ ‫ٶݯ‪ংద‬ף‬ ‫ݯ‪ద‬آₚ‬ ᨃᑢ‫آݯ‬ ABSTRACT: A comparative study of leaf epidermal microstructures in the tribe Sorbarieae (Adenostoma: 3 spp., Chamaebatiaria: 1 sp., Sorbaria: 11 spp., Spiraeanthus: 1 sp.) including related genera Gillenia (2 spp.) and Lyonothamnus (2 spp.) was carried out using scanning electron microscopy (SEM) in order to evaluate their significance in taxonomy. The leaves of Adenostoma, Chamaebatiaria, and Spiraeanthus were
more » ... atic, whereas Gillenia, Lyonothamnus, and Sorbaria were hypostomatic. The size range of the guard cells is 7.84−48.7 × 5.86−38.6 µm; the smallest one was found in Sorbaria tomentosa var. tomentosa (7.84−11.8 × 6.84−10.5 µm), while the largest measured example was Adenostoma fasciculatum var. obtusifolium (30.3−48.7 × 18.8−38.6 µm). Anomocytic stomata complex were the most frequent type (rarely cyclocytic), with usually both anomocytic and actinocytic types occurring in one leaf. On the surfaces, both the adaxial and abaxial anticlinal walls of the subsidiary cells vary (e.g., straight/curved, undulate, sinuate). Four types (unicellular non-glandular trichome, stellate, glandular trichome, pustular glandular trichome) of trichomes are found in the leaves. The epicuticular wax can be divided two types: membraneous platelets (Lyonothamnus) and platelets (Sorbaria arborea var. arborea, S. arborea var. subtomentosa, S. kirilowii, S. tomentosa var. tomentosa, Spiraeanthus schrenkianus). The trichome diversity (in particular, stellate, gland) and the existence of epicuticular wax may have taxonomic significance, although the leaf epidermal micromorphological characteristics do not provide synapomorphy in this tribe. These leaf micromorphological features are most likely better understood in the Sorbarieae when used in conjunction with external morphological characters. ࢼ: ᮒাᑚ↗(Adenostoma: 3 spp., Chamaebatiaria: 1 sp., Sorbaria: 11 spp., Spiraeanthus: 1 sp.)‫آ‬ ‫ئ‬ ᚪቾ‫ږ‬ Gillenia᪳ 2ᚪቾ‫,ږ‬ Lyonothamnus᪳ 2ᚪቾ‫ږ‬ ‫ݲݾ‬ ♃ 20ᚪቾ‫⁾ږ‬ ₴ ‫ݒٲ‬ ᔞᩞ‫↖ڒ‬Ỷ ద‫ݲ‬ ᚪ ቾ‫℧ݯ‬ ⁆῏ᩗ ֦ζ‫₶؆ݮ‬ ∢᧒K₶ࠚᔞ‫(ף‬SEM) ₚ῏‫ݮ‬ἒ ‫؆ݮ╖ئ‬ ‫ݮ⃒ݖ‬ἦఊ. Adenostoma᪳, Chamaebatiaria᪳, Spiraeanthus᪳Ỷᩂ ‫؛ݖ‬ᘛ‫(◚ݿ‬stomatal complex) ⚻‫آ‬ ᕖ⚻ Ꮞ൶Ỷ ‫ₚ؛ݖ‬ ↚⃒ ‫ݮ‬ ặ‫؛ݖ‬ἣ(amphistomatic type)ₚỮ؆, Gillenia᪳, Lyonothamnus᪳‫آ‬ Sorbaria᪳Ỷᩂ ᕖ⚻(abaxial ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. side)Ỷዲ ↚⃒‫ݮ‬ ₚ‫؛ݖ‬ἣ(hypostomatic type)ᆂ া˖ఊ. ‫؛‬ᗦᩞ‫⁾‬ ʂ‫ݖ‬ 7.84−48.7 × 5.86− 38.6 µmᆂ ᪳‫آ‬ ↫ዮఊ ఊ᪲ ╎ₚኢ ᘚₚಖ, Sorbaria tomentosa var. tomentosa (7.84−11.8 × 6.84− 10.5 µm)Ԧ Ԧ ₷ ‫؛‬ᗦᩞ‫‬ᆂ া˖؆, Adenostoma fasciculatum var. obtusifolium (30.3−48.7 × 18.8−
doi:10.11110/kjpt.2016.46.2.199 fatcat:hko7trcrwvho7oefs6geeorxcy