Comparative leaf morphology and anatomy of six Selaginella species (Selaginellaceae, subgen. Rupestrae) with notes on xerophytic adaptations

被引：9

作者：

Belen Adame-Gonzalez, Ana ^{[1
]}

Eugenia Muniz D-L, Maria ^{[2
]}

Valencia A, Susana ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Herbario Fac Ciencias, Dept Biol Comparada, Mexico City 04510, DF, Mexico

[2] Univ Nacl Autonoma Mexico, Taller Plantas 1 & 2 Fac Ciencias, Dept Biol Comparada, Mexico City 04510, DF, Mexico

来源：

FLORA | 2019年 / 260卷

关键词：

Epicuticular waxes; Isophyllous; Sporophyll; Xeric environment; Mexico; PHYLOGENETIC-RELATIONSHIPS; CLASSIFICATION; PHOTOSYNTHESIS; SURFACE; PLANTS; LIGHT;

D O I：

10.1016/j.flora.2019.151482

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The morphology and anatomy of vegetative leaves and sporophylls of six isophyllous species of Mexican Selaginella (subgen. Rupestrae): S. arsenei, S. extensa, S. peruviana, S. rupincola, S. sellowii and S. wrightii are described. The six species show small size of vegetative leaves (1.82-3.22 mm long x 0.32-0.62 mm wide), and lanceolate shape. The sporophylls are ovate (1.77-2.30 mm long x 0.63-0.84 mm wide). All species have hypostomatic leaves, with a central longitudinal stomatal groove on the abaxial surface. The central area is longitudinally flanked by long epidermal cells, and these by two rows of papillate cells. Epicuticular waxes as thin films, crusts or folds are present on the abaxial epidermal cells. The mesophyll has two longitudinal rows of sclerenchyma beneath the abaxial epidermis. Thickened epidermal cell walls are also present. These features are consistent with the climatic characteristics of the xeric environments these species live in, and can be considered xeric adaptations.

引用

页数：12