Results 21 to 30 of about 4,714,607 (247)

Pollination ecology of Synedrella nodiflora (l.) Gaertn. (Asteraceae)

Journal of Threatened Taxa, 2018
Synedrella nodiflora (L.) Gaertn grows almost throughout the year if the soil is damp. It produces heterogamous capitula with female ray florets anthesing first day and bisexual disc florets anthesing on the next three consecutive days.
B. Usharani, A.J. Solomon Raju
doaj   +1 more source

Pollen characterisation of Maltese honey [PDF]

, 2013
In 2004 and 2005, pollen characterisation of 35 samples of honey collected from the islands of Malta and Gozo, was carried out with the aim to identify the botanical origin of honey produced on these islands.
Mifsud, David, Lanfranco, Edward, Gambin, Claudette   +2 more
core   +1 more source

Secondary pollen presentation: More than to increase pollen transfer precision.pdf

, 2021
Pollination precision and efficiency have been deemed to be important driving forces in floral evolution.Herkogamy reduction is a main mechanism to increase pollination precision. Secondary pollen presentation (SPP),by which pollen is presented on other floral organs especially pistils, has been widely accepted as a specialmechanism to increase pollen ...
openaire   +1 more source

Taxonomy of the genus Keetia (Rubiaceae-subfam. Ixoroideae-tribe Vanguerieae) in southern Africa, with notes on bacterial symbiosis as well as the structure of colleters and the ‘stylar head’ complex

Bothalia: African Biodiversity & Conservation, 2009
The genus Keetia E.Phillips has a single representative in the Flora of southern Africa region (FSA). namely K.  gueinzii (Sond.) Bridson. The genus and this species are discussed, the distribution mapped and traditional uses indicated. The structures of
P. M. Tilney, A. E. van Wyk
doaj   +1 more source

Effects of Alternaria alternata f.sp. lycopersici toxins on pollen [PDF]

, 1988
Effects of the phytotoxic compounds (AAL-toxins) isolated from cell-free culture filtrates of Alternaria alternata f.sp. lycopersici on in vitro pollen development were studied. AAL-toxins inhibited both germination and tube growth of pollen from several
Franken, J., Franken, J.,, Witsenboer, H.M.A.,, Witsenboer, H.M.A., Bino, R.J.,, Hille, J., Dons, J.J.M.,, Hille, J.,, Bino, R.J., Dons, J.J.M.   +9 more
core   +2 more sources

Pollination ecology and fruiting behavior of Pavetta indica L. (Rubiaceae), a keystone shrub species in the southern Eastern Ghats forest, Andhra Pradesh, India

Journal of Threatened Taxa, 2016
Pavetta indica is a massive bloomer for a brief period in May.  The flowers are hermaphroditic, strikingly protandrous, self and cross-compatible, nectariferous and psychophilous.  They possess secondary pollen presentation mechanism as a device to avoid
A.J. Solomon Raju, M. Mallikarjuna Rao, K. Venkata Ramana, C. Prasada Rao, M. Sulakshana   +4 more
doaj   +1 more source

Loss of YABBY2-like gene expression may underlie the evolution of the laminar style in Canna and contribute to floral morphological diversity in the Zingiberales

Frontiers in Plant Science, 2015
The Zingiberales is an order of tropical monocots that exhibits diverse floral morphologies. The evolution of petaloid, laminar stamens, staminodes, and styles contributes to this diversity.
Kelsie eMorioka, Roxana eYockteng, Roxana eYockteng, Roxana eYockteng, Ana M. R. Almeida, Ana M. R. Almeida, Chelsea eSpecht   +6 more
doaj   +1 more source

Gelechiidae Moths Are Capable of Chemically Dissolving the Pollen of Their Host Plants [PDF]

, 2011
Background: Many insects feed on pollen surface lipids and contents accessible through the germination pores. Pollen walls, however, are not broken down because they consist of sporopollenin and are highly resistant to physical and enzymatic damage. Here
Li, Yongquan, Luo, Shixiao, Zhang, Dianxiang, Chen, Shi, Renner, Susanne S.   +4 more
core   +1 more source

Structure and Function of a Multi‐Megadalton Virus‐Like Proteolytic Dodecahedron

Angewandte Chemie, EarlyView.
Zuzalysin, a virulence metallopeptidase of the periodontal pathogen Porphyromonas gingivalis, is secreted as a latent, flexible ≈95‐kDa monomer. Calcium triggers cysteine‐switch activation and hierarchical assembly into pentamers, bipentamers, tripentamers, and a ≈5.6‐MDa, ≈355‐Å dodecahedron. Structures at 1.8–3.6 Å reveal a virus‐sized catalytic cage
Mariusz Madej, Arturo Rodríguez‐Banqueri, Danuta Mizgalska, Borys Szmigielski, Zuzanna Nowakowska, Małgorzata Benedyk‐Machaczka, Monika Bzowska, Katarzyna Mikruta, Juan Sebastián Ramírez‐Larrota, Chinanu Agunanne, Olivier Julien, Anthony J. O'Donoghue, Carsten Scavenius, Mario López‐Martín, Enrique Marcos, Łukasz Koziej, Sebastian Glatt, Pablo Guerra, Ulrich Eckhard, Jan Potempa, F. Xavier Gomis‐Rüth   +20 more
wiley   +2 more sources

Biologia floral e polinização de Arrabidaea conjugata (Vell.) Mart. (Bignoniaceae) Floral and pollination biology of Arrabidaea conjugata (Vell.) Mart. (Bignoniaceae)

Acta Botânica Brasílica, 2005
O trabalho aborda a biologia floral, a atividade forrageira dos visitantes florais (polinizadores e pilhadores), os eventos fenológicos e o sistema de reprodução de Arrabidaea conjugata (Vell.) Mart.
Maria Célia Rodrigues Correia, Maria Célia B. Pinheiro, Heloísa Alves de Lima   +2 more
doaj   +1 more source