Pollen morphology and exine ultrastructure of selected species of Waltheria L. (Byttnerioideae-Malvaceae)

被引：15

作者：

Saba, Marileide Dias ^{[1
]}

Ribeiro dos Santos, Francisco de Assis ^{[2
]}

机构：

[1] Univ Estado Bahia UNEB, Lab Estudos Palinol, Dept Educ, BR-48970000 Senhor Do Bonfim, BA, Brazil

[2] Univ Estadual Feira de Santana, Dept Ciencias Biol, Lab Micromorfol Vegetal, BR-44036900 Feira de Santana, BA, Brazil

来源：

REVIEW OF PALAEOBOTANY AND PALYNOLOGY | 2015年 / 221卷

关键词：

Palynology; Heterostyly; Pollen dimorphism; Malvaceae; Sterculiaceae; STERCULIACEAE;

D O I：

10.1016/j.revpalbo.2015.07.007

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The pollen morphology of five species: Waltheria albicans Turczaninow, Waltheria brachypetala Turczaninow, Waltheria cinerascens Auguste Saint-Hilaire, Waltheria martiana Bentham ex J.G. Saunders, and Waltheria viscosissima Auguste Saint-Hilaire were studied by light microscopy (LM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), focusing on apertural type and exine. Pollen grains are medium to large, isopolar, oblate spheroidal to prolate spheroidal, 3(-4)-5(-6)-zonocolporate, costate, and fastigiate. Exine ornamentation is microreticulate, homobrochate, suprareticulate (longistyled morph), and microechinate to echinate (brevistyled morph). Sexine thickness is equal to or greater than the nexine. In TEM, the sexine consists of four layers, having an inner sexine 1, and outer sexine 4. An ultrathin section of exine revealed a columellate-like intine on pollen grains of W. cinerascens. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：204 / 210

页数：7

共 27 条

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