Buscar
Mostrando ítems 1-10 de 26
Could microechinate orbicules be related to the release of pollen in anemophilous and 'buzz pollination' species?
(Csiro Publishing, 2019-02)
The function of orbicules has been a matter of speculation for a long time and until now no satisfactory answer has been put forward. We propose two hypotheses that could contribute to the elucidation of their function: ...
Pollen development and orbicule and pollen grain morphology in species of cephalanthus (rubiaceae-naucleeae) from the Americas
(Csiro Publishing, 2017)
This paper is the first embryological report on the genus Cephalanthus L. and contributes to future studies in other genera in the tribe Naucleeae. The development of the anther wall in Cephalanthus glabratus (Spreng.) K. ...
Tourmaline orbicules in peraluminous monzogranites of Argentina: A study case of fluid-rock interaction between leucogranite and country-rock metasediments
(Pergamon-Elsevier Science Ltd, 2017-12)
Tourmaline orbicules hosted in peraluminous granites are documented worldwide. Seven occurrences were identified in Argentina. Petrography, mineral chemistry, whole-rock geochemistry mass balance and microthermometric ...
Pollen development and orbicule and pollen grain morphology in species of Cephalanthus (Rubiaceae-Naucleeae) from the Americas
(Csiro Publishing, 2017-05)
This paper is the first embryological report on the genus Cephalanthus L. and contributes to future studies in other genera in the tribe Naucleeae. The development of the anther wall in Cephalanthus glabratus (Spreng.) K. ...
Oxalis section Alpinae (Oxalidaceae): orbicule diversity and pollen grain morphology
(Tubitak Scientific & Technical Research Council Turkey, 2016-06)
Orbicule characteristics and pollen morphology were studied using light microscopy and scanning electron microscopy with 13 species of Oxalis section Alpinae, endemic to South America. Orbicules are either homogeneous or ...
Pollen development and anther morphology in 14 species of Rhamnaceae
(Springer Wien, 2016-12)
Microsporogenesis, microgametogenesis, and anther structure of 14 species belonging to Rhamneae (Rhamnoids clade), Paliureae, Pomaderreae, Colletieae, and Gouanieae (Ziziphoids clade) of the Rhamnaceae family were analyzed ...
Developmental and ultrastructural characters of the pollen grains and tapetum in species of Nymphaea subgenus Hydrocallis
(Springer Wien, 2017-07)
Variations in pollen characters and tapetum behavior were recently acknowledged in the early-divergent family Nymphaeaceae and even within the genus Nymphaea, which probably is not monophyletic; some traits such as infratectum ...
Developmental and ultrastructural characters of the pollen grains and tapetum in species of nymphaea subgenus hydrocallis
(Springer, 2017)
Variations in pollen characters and tapetum behavior were recently acknowledged in the early-divergent family Nymphaeaceae and even within the genus Nymphaea, which probably is not monophyletic; some traits such as infratectum ...