Results 61 to 70 of about 27,074 (169)

Loss of E3 ligase HvST1 function substantially increases distal crossover frequency

open access: yesNew Phytologist, Volume 249, Issue 3, Page 1325-1341, February 2026.
Summary This study characterizes the function of a grass‐specific E3 ubiquitin ligase, HvST1, in regulating synapsis and crossover (CO) formation during meiosis in barley (Hordeum vulgare). In large‐genome cereals, COs are predominantly restricted to distal chromosomal regions, limiting genetic recombination and breeding flexibility.
Jamie Neil Orr   +8 more
wiley   +1 more source

Floral biology of Tropaeolum majus L. (Tropaeolaceae) and its relation with Astylus variegatus activity (Germar 1824) (Coleoptera: Melyridae)

open access: yesAnais da Academia Brasileira de Ciências, 2011
Tropaeolum majus L. (nasturtium) is a culture popularly known by its medicinal, ornamental and culinary utility. This work aimed to evaluate the interaction between Astylus variegatus (Germar 1824) (Coleoptera: Melyridae) and the nasturtium flowers ...
Maria Emilia P.F. Silva   +5 more
doaj  

Palinologia de espécies de Gesneriaceae Rich. & Juss. ocorrentes no Estado do Rio de Janeiro, Brasil Palynology of Gesneriaceae Rich. & Juss. species from Rio de Janeiro State, Brazil

open access: yesActa Botânica Brasílica, 2010
Foi realizado um estudo palinológico de 21 espécies da família Gesneriaceae reunidas em seis gêneros e três tribos: tribo Beslerieae -Besleria L. (4 spp.); tribo Episcieae - Codonanthe (Mart.) Hanst. (3 spp.), Nematanthus Schrad.
Ana Carolina da Silva Fourny   +3 more
doaj   +1 more source

Utilização do teor em metais pesados no pólen como marcador ambiental : estudo preliminar [PDF]

open access: yes, 2012
Este trabalho apresenta os resultados preliminares sobre a avaliação de metais pesados no pólen de plantas que vegetam em locais com diferentes níveis de poluição.
Anjos, O.   +3 more
core  

Fine‐tuning the buzz: comparing visitation frequency and pollination effectiveness in plant–pollinator networks

open access: yesNew Phytologist, Volume 249, Issue 4, Page 2140-2152, February 2026.
Summary Ecological network approaches have advanced our understanding of how species interactions influence community and evolutionary dynamics. However, a key limitation is that most network analyses rely solely on visitation data, often overlooking functional aspects of interactions.
Lorena B. Valadão‐Mendes   +4 more
wiley   +1 more source

EVALUATION OF FLORAL CHARACTERISTICS OF MELON HYBRIDS (Cucumis melo L.) IN POLLINATOR ATTRACTIVENESS

open access: yesRevista Brasileira de Fruticultura, 2016
Floral morphology and biology are important characteristics for plant-pollinator interactions and may influence the behavior of these agents. This study aimed to determine which floral attributes of different melon hybrids influence this interaction and,
LÚCIA HELENA PIEDADE KIILL   +4 more
doaj   +1 more source

Aplicação de uma língua electrónica na classificação de méis monoflorais [PDF]

open access: yes, 2007
Analisou-se o perfil polínico de 51 amostras de mel nacional. Os pólens mais frequentes no mel são originários das plantas dos géneros Lavandula, Cistus, Echium, Erica, Castanea, Thymus, Prunus, Cytisus, Carduus, Trifolium e Citrus.
Dias, L.G.   +5 more
core  

Temperature‐dependent pollinator‐mediated selection on floral thermoregulation

open access: yesNew Phytologist, Volume 249, Issue 4, Page 1716-1726, February 2026.
Summary The thermal environment is one of the most pervasive agents of selection. Most plants cannot choose their microclimate, so understanding how they cope with thermal variability is of critical concern. Several floral traits can modify the floral thermal microenvironment, which may alleviate negative impacts of thermal extremes on gametophytes and
Matthew H. Koski   +5 more
wiley   +1 more source

Viabilidade do pólen de cinco acesso de bacurizeiro (Platonia insignis MART.) em diferentes concentrações de sacarose. [PDF]

open access: yes, 2015
O bacurizeiro é uma das espécies frutíferas nativas de maior importância socioeconômica do Meio-Norte do Brasil. No entanto, ainda há carência de conhecimentos científicos sobre a espécie, especialmente sobre a biologia floral, os mecanismos reprodutivos
COSTA, M. do P. S. D.   +6 more
core  

Last millennium environmental changes and climate inferences in the Southeastern Atlantic forest, Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2010
This study presents paleoenvironmental data based on pollen, elemental and isotopic compositions of organic matter (TOC, N, d13C and d15N) and 14C dating of 170 cm lake sediment record.
Luiz C.R. Pessenda   +6 more
doaj   +1 more source

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