Results 61 to 70 of about 84,030 (303)

Pollen morphology of Monsonia

open access: yesSouth African Journal of Botany, 1986
The pollen morphology of all 25 species of Monsonia L. (Geraniaceae) has been studied. The pollen grains are tricolpate, subprolate to spheroidal. The exine structure is reticulate. The nexine consists only of nexine 1 (footlayer). The pollen of Monsonia species cannot be identified to species level. They have to be assigned to pollen types or subtypes.
Verhoeven, R.L., Venter, H.J.T.
openaire   +1 more source

Advancing European Plant Variety Registration: Data‐Driven Insights and Stakeholder Perspectives

open access: yesAgribusiness, EarlyView.
ABSTRACT Efficient plant variety registration is crucial for fostering innovation in the European Union, yet the current regulatory framework is complex and faces calls for reform. This study provides data‐driven evidence to inform the ongoing legislative debate by employing a mixed‐methods approach.
Sergio Urioste Daza   +2 more
wiley   +1 more source

Pollen morphology of 31 taxa of genus Iris(Iridaceae)and its taxonomic implications

open access: yesGuangxi Zhiwu
To investigate the pollen morphology and its potential taxonomic implications for genus Iris L.(Iridaceae), the pollen grains from 31 taxa across three subgenera of Iris were used as materials.
ZHU Ying*, SONG Hua, LI Kai, ZHANG Lei, WANG Baibing
doaj   +1 more source

Palynology and meiotic behavior of Genipa americana L., a species native to the Amazon

open access: yesBioscience Journal, 2023
Genipa americana L., commonly known as genipap, belongs to the Rubiaceae family. This study aimed to describe the pollen morphology of the species, evaluate its meiotic behavior and pollen viability, and provide information to help the maintenance and ...
Danieli Aline Cigolini Ruzza   +7 more
doaj   +1 more source

Pollen morphology of Andrographideae (Acanthaceae)

open access: yesReview of Palaeobotany and Palynology, 1992
Abstract Pollen morphology of Andrographis Wallich, Cystacanthus T. Anderson, Diotacanthus Bentham, Gymnostachyum Nees, Haplanthus Nees and Phlogacanthus Nees from Andrographideae (Acanthaceae) is described and illustrated. Pollen morphological variation is compared to accepted generic limits.
openaire   +2 more sources

Smart Bioinspired Material‐Based Actuators: Current Challenges and Prospects

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 3, March 2025.
This work gathers, in a review style, an extensive and comprehensive literature overview on the development of autonomous actuators based on synthetic materials, bringing together valuable knowledge from several studies. Furthermore, the article identifies the fundamental principles of actuation mechanisms and defines key parameters to address the size
Alejandro Palacios   +4 more
wiley   +1 more source

Morphological and Ultrastructural Features of Selected Epidendroideae Pollen Dispersal Units and New Insights into Their Chemical Nature

open access: yesPlants
Orchidaceae display enormous diversity in their flower morphology, which is particularly evident in their pollen dispersal units (pollinia, pollinaria).
Carola Purgina   +3 more
doaj   +1 more source

Proline synthesis in developing microspores is required for pollen development and fertility [PDF]

open access: yes, 2018
Background: In many plants, the amino acid proline is strongly accumulated in pollen and disruption of proline synthesis caused abortion of microspore development in Arabidopsis.
Biancucci, Marco   +6 more
core   +1 more source

Pollen morphology of Contortae (Acanthaceae)

open access: yesBotanical Journal of the Linnean Society, 1993
Variation in pollen morphology is described and illustrated for 36 genera of Acanthaceae with contorted corolla aestivation. A parsimony analysis of pollen characters is presented.
openaire   +1 more source

Phylogenetic systematics of Juncaceae

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Juncaceae has needed taxonomic revision for some time. Specifically, the genus Juncus s.l. is known to be paraphyletic because five small southern‐hemisphere genera have been shown repeatedly to be nested within it. In 2022, a new classification was proposed, based on phylogenies built from one nuclear and three plastid regions ...
Reed J. Kenny   +2 more
wiley   +1 more source

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