Results 71 to 80 of about 1,565 (195)

Pollinator efficiency, rather than bee decline, explains a shift to hummingbird pollination in tropical montane forests

open access: yesNew Phytologist, Volume 251, Issue 4, Page 2237-2247, August 2026.
Hummingbird pollination is a hallmark of American plant diversity and has long been thought to evolve in tropical mountains due to declining bee activity. Using sister species of Costus specialized on bees (C. kuntzei) and hummingbirds (C. wilsonii), we show that this shift is not driven by reduced bee visitation with elevation, but by greater ...
Pedro Juárez   +7 more
wiley   +1 more source

Kultura antera psenice

open access: yes, 2010
U monografiji se daje pregled biotehnoloških metoda primenljivih u procesu oplemenjivanja pšenice. Poseban akcenat se stavlja na kulturu tkiva i regeneraciju zelenih biljaka iz antera gajenih u in vitro uslovima.
Vukosavljev, Mirjana
core  

Quantitative Evaluation of the Effectiveness of Erbium Glass Laser Therapy for Acne Scars

open access: yesApplied Sciences
Background: Acne scarring presents a significant esthetic and psychological concern, commonly classified into atrophic and hypertrophic types. Effectively managing these lesions often involves the use of therapeutic strategies such as laser treatments ...
Wiktoria Odrzywołek   +5 more
doaj   +1 more source

Embriología de las estructuras reproductoras masculinas del género Pinguicula L. (Lentibulariaceae)

open access: yesBotan‪ical Sciences, 2005
Con el propósito de contribuir al conocimiento embriológico del género Pinguicula (Lentibulariaceae) se estudiaron los procesos ontogenéticos de las estructuras reproductoras masculinas de una especie representativa de cada uno de los tres subgéneros ...
Silvia Espinosa-Matías   +2 more
doaj   +1 more source

Trimerous magnoliid flowers with a unique set of floral and pollen traits from the Late Cretaceous of Southern Bohemia (Czech Republic)

open access: yesNew Phytologist, Volume 251, Issue 4, Page 2266-2283, August 2026.
Morphospace position and phylogenetic placements of Trimeriantha monopolyada. Summary Floral structure is a key aspect of angiosperm diversity. Recent research revealed that significant floral disparity was already present in the Cretaceous. However, our understanding of early floral diversity remains limited, as it is directly dependent on the fossil ...
Xieting Wu   +7 more
wiley   +1 more source

ALOGAMIA EM ARROZ (Oryza sativa L.) E RELAÇÃO COM CARACTERÍSTICAS AGRONÔMICAS RICE (Oryza sativa L.) ALLOGAMY AND RELATIONSHIP WITH AGRONOMIC TRAITS

open access: yesPesquisa Agropecuária Tropical, 2007
<!-- @page { margin: 2cm } --> <p class="western" align="justify"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">A produção de sementes híbridas de arroz, utilizando a técnica chinesa, requer uma
Péricles de Carvalho Ferreira Neves   +1 more
doaj   +1 more source

Anatomia do desenvolvimento floral de Cassia multijuga Rich. (Leguminosae-Caesalpinoidae)

open access: yesRodriguésia
No estudo anatômico da flor de Cassia muitijuga Rich., chamou-nos atenção as seguintes ocorrências: desenvolvimento não simultâneo dos verticilos florais; presença de tecido nectarífero nos frisos laterais das anteras; desenvolvimento simultâneo das ...
Delphos José Guimarães   +2 more
doaj   +1 more source

Morphological markers for microspore developmental stage in maize

open access: yesBrazilian Archives of Biology and Technology, 2008
The use of maize in anther culture has been limited because only few genotypes presented a high androgenetic potential. Obtaining the proper stage of microspore development at culture initiation is one of the most crucial factors for success in the ...
Ana Paula de Moraes   +3 more
doaj   +1 more source

Regenerasi dan Aklimatisasi Kultur Antera Enam Persilangan F1 Padi Sawah

open access: yesJurnal Agronomi Indonesia (Indonesian Journal of Agronomy), 2016
ABSTRACT<br /><br />The breeding of rainfed rice tolerant to drought can be accomplished using anther culture. The objectives of this research were to determine regeneration abilities of six F1 anther culture and its acclimatization ability. The experiment was arranged in completely randomized design with 14 replications.
Cucu Gunarsih   +3 more
openaire   +1 more source

Induksi Pembelahan Sporofitik Pada Kultur Antera Takokak (Solanum Torvum) Dengan Perlakuan Cekaman Suhu Dan Penambahan Prolina

open access: yes, 2017
Androgenesis melalui teknik kultur antera merupakan salah satu cara tercepat untuk mendapatkan galur murni. Upaya pengembangan teknik ini belum pernah dilaporkan pada tanaman takokak (Solanum torvum). Tujuan penelitian ini adalah untuk induksi pembelahan
Octafyanna, Niedya
core   +1 more source

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