Results 61 to 70 of about 9,860 (127)

A new exceptionally preserved sawfly fossil (Hymenoptera: Pergidae) and an evaluation of its utility for divergence time estimation and biogeography

open access: yesSystematic Entomology, Volume 50, Issue 1, Page 237-251, January 2025.
We describe the first Australian Pergidae fossil species, Baladi warru, from McGraths Flat, a newly discovered Miocene Konservat‐Lagerstätte in Australia. The specimen contains pollen grains from Quintianapolis that were imaged with high‐resolution using SEM.
Juanita Rodriguez   +4 more
wiley   +1 more source

Stable isotope analysis indicates partial mycoheterotrophy in arbuscular mycorrhizal woody seedlings in tropical forests

open access: yesFunctional Ecology, Volume 38, Issue 12, Page 2720-2733, December 2024.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Chlorophyllous plants exhibiting partial mycoheterotrophy obtain carbon through mycorrhizal interactions in addition to photosynthesis. In arbuscular mycorrhizal (AM) plants, the Paris‐morphotype (i.e.
Franziska E. Zahn   +3 more
wiley   +1 more source

Cattle and nurse trees shape subtropical forest–grassland ecotones

open access: yesJournal of Applied Ecology, Volume 61, Issue 10, Page 2430-2443, October 2024.
Tree cover can potentially expand on the subtropical South American grasslands. Reductions in cattle densities and increases in rainfall levels associated with climate change could facilitate forest expansion in this region. Abstract South American subtropical landscapes are dominated by open grasslands and mosaics of forest–grassland formations ...
Milena Holmgren   +8 more
wiley   +1 more source

Embryo excision in Compositae, with implications for combating biodiversity loss

open access: yesApplications in Plant Sciences, Volume 12, Issue 5, September-October 2024.
Abstract Premise Embryo excision is an effective, under‐described means of promoting germination in the sunflower family and may help to ensure the survival of endangered taxa or lineages with limited seed availability. Methods and Results We describe and illustrate a detailed method of embryo excision used successfully to stimulate germination in a ...
Bruce G. Baldwin   +2 more
wiley   +1 more source

Morfologia de plântulas e estádios juvenis de espécies invasoras = Morphology and development of seedlings and saplings of weeds

open access: yesActa Scientiarum: Biological Sciences, 2007
Plântulas e plantas jovens de vinte espécies de plantas invasoras, que ocorrem nas culturas mais freqüentes de Maringá, Estado do Paraná, Brasil e regiões adjacentes, foram descritas morfologicamente, e contribuem para identificação no campo e fornecem ...
Juliana Marzinek   +2 more
doaj  

Morfoanatomia da plântula e do tirodendro de Arrabidaea mutabilis Bureau & K. Schum. (Bignoniaceae)- DOI: 10.4025/actascibiolsci.v29i2.599

open access: yesActa Scientiarum: Biological Sciences, 2007
Em remanescentes florestais da região noroeste do Paraná (Brasil), ocorrem várias espécies de lianas, que podem afetar o desenvolvimento de espécies arbóreas e arbustivas. Dentre essas lianas, destaca-se Arrabidaea mutabilis Bur. & K. Schum., pelo rápido
Luiz Antonio Souza   +2 more
doaj   +1 more source

Habitat differences in seed‐dispersing vertebrates indicate dispersal limitation in tropical bracken‐dominated deforested areas

open access: yesBiotropica, Volume 56, Issue 3, May 2024.
Forest regeneration in tropical bracken‐dominated deforested areas is mainly hindered by dispersal limitation. We found differences in species composition of seed‐dispersing birds and bats between the forest and bracken‐dominated areas, which could be one of the main causes of dispersal limitation in forest regeneration in tropical bracken‐dominated ...
Silvia C. Gallegos   +10 more
wiley   +1 more source

Eficacia de biofungicidas frente a la caída de plántula de pepino, inducida por Pythium aphanidermatum

open access: yesRevista de Investigación en Agroproducción Sustentable, 2018
El objetivo de la presente investigación fue determinar la eficacia de ciertos tratamientos, a base de biofungicidas, frente a la caída de plántula de pepino causada por Pythium aphanidermatum.
Deissy Milly Leiva Villanueva
doaj   +1 more source

Relação entre tamanho e armazenamento de sementes de soja colhidas no cerrado de Roraima na qualidade física e fisiológica

open access: yesAgro@mbiente On-line, 2010
Uma mesma cultivar de soja pode apresentar variação no tamanho das sementes. A variabilidade no tamanho das sementes pode causar redução, tanto na qualidade física quanto na qualidade fisiológica das mesmas, como também pode apresentar variação de ...
Cylles Zara dos Reis Barbosa
doaj   +1 more source

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