Results 41 to 50 of about 2,014,566 (222)

Seasonal variation in sexual readiness in a facultatively sexual freshwater cnidarian with diapausing eggs

Ecosphere, 2021
Facultative sexuality combines clonal propagation with sexual reproduction within a single life cycle. Clonal propagation enables quick population growth and the occupancy of favorable habitats.
Jácint Tökölyi, Réka Gergely, Máté Miklós   +2 more
doaj   +1 more source

Epidemic spreading on heterogeneous networks with identical infectivity [PDF]

, 2006
In this paper, we propose a modified susceptible-infected-recovered (SIR) model, in which each node is assigned with an identical capability of active contacts, $A$, at each time step.
Albert, Anderson, Bai, Barabási, Barthélemy, Barthélemy, Bing-Hong Wang, Derrida, Gupta, Jie Ren, Kim, Liljeros, May, Moreno, Morris, Pastor-Satorras, Pastor-Satorras, Pastor-Satorras, Pastor-Satorras, Pastor-Satorras, Rui Yang, Tao Zhou, Vázquez, Wen-Jie Bai, Wen-Xu Wang, Yan, Zhi-Wen Shi, Zhou, Zhou, Zhou   +29 more
core   +2 more sources

Effects of Plant Growth Regulators on the Rapid Propagation System of Broussonetia papyrifera L. Vent Explants

Forests, 2021
Broussonetia papyrifera is an important ecological and economic tree species. The sexual reproduction of B. papyrifera not only has a low germination rate, but also requires high environmental conditions.
Jiakang Zhou, Yang Liu, Liang Wu, Yunlin Zhao, Zhang Wan, Guiyan Yang, Zhenggang Xu   +6 more
semanticscholar   +1 more source

Germinação de sementes de tanchagem (Plantago tomentosa Lam.): influência da temperatura, luz e substrato Germination of Plantago tomentosa Lam. seeds: influence of the temperature, light and substrate

Ciência e Agrotecnologia, 2008
Plantago tomentosa Lam. (Plantaginaceae) é usada na medicina popular como agente anti-tumoral, antimicrobiana e antinflamatória. Sua propagação ocorre por meio de sementes, cuja germinação tem sido pouco investigada. Dessa forma, o presente trabalho teve
Sara Dousseau, Amauri Alves de Alvarenga, Lúcio de Oliveira Arantes, Davi Melo de Oliveira, Fernanda Carlota Nery   +4 more
doaj   +1 more source

Distinct Reproductive Strategy of Two Endemic Amazonian Quillworts

Diversity, 2021
We examined the reproductive strategy of two Amazonian quillworts (Isoëtes cangae and Isoëtes serracarajensis), endemic and threatened species of canga ecosystems.
Cecilio F. Caldeira, Arthur V. S. Lopes, Keyvilla C. Aguiar, Aline L. Ferreira, João V. S. Araujo, Vinnícius M. S. Gomes, Daniel B. Zandonadi, Cinthia B. Abranches, Silvio J. Ramos, Markus Gastauer, Naiara V. Campos, Lísia M. S. Gestinari, Luis A. Prado, Fernando M. G. Santos, Rodrigo L. Martins, Francisco A. Esteves, Guilherme Oliveira, Mirella P. Santos   +17 more
doaj   +1 more source

Propagating Cassava (Manihot esculenta) by Sexual Seed

Experimental Agriculture, 1994
SUMMARYCommercial cassava production from true cassava seeds (TCS) appears to be a promising option for reducing or eliminating several of the production constraints associated with vegetative propagation. The most important contribution of TCS would be to reduce virus build-up in vegetative material and to resolve the problems of stake storage, low ...
Iglesias, C.A., Hershey, Clair H., Calle, F., Bolaños, A.   +3 more
openaire   +2 more sources

Pulsating-campaigns of human prophylaxis driven by risk perception palliate oscillations of direct contact transmitted diseases [PDF]

, 2020
Human behavioral responses play an important role in the impact of disease outbreaks and yet they are often overlooked in epidemiological models. Understanding to what extent behavioral changes determine the outcome of spreading epidemics is essential to
Arenas, Alex, Granell, Clara, Gómez-Gardeñes, Jesús, Steinegger, Benjamin   +3 more
core   +2 more sources

Características físicas e químicas de substratos para produção de mudas de Ilex paraguariensis St. Hil. Physical and chemical characteristics of substrates for the production of Ilex paraguariensis St. Hil. seedlings

Revista Árvore, 2007
Neste trabalho, objetivou-se avaliar as propriedades físicas e químicas de diferentes materiais e suas combinações, bem como sua influência na produção de mudas de erva-mate em tubetes plásticos. O trabalho foi conduzido no viveiro da Empresa Baldo S.A.,
Ivar Wendling, Daniel Guastala, Renato Dedecek   +2 more
doaj   +1 more source

Physiological, morphological and biochemical characteristics of the sexual propagation of Piper aduncum (Piperaceae)

, 2011
Buscou-se neste trabalho efetuar a caracterizacao dos diasporos maduros e do processo germinativo de Piper aduncum L., bem como verificar a influencia da interacao entre presenca e ausencia de luz (fotoperiodo de 12 horas e escuro) e temperaturas (25 °C,
S. Dousseau, A. A. Alvarenga, E. Alves, I. S. Chaves, Elma dos Santos Souza, Juliana da Silva Alves   +5 more
semanticscholar   +1 more source

Improved node culture methods for rapid vegetative propagation of switchgrass (Panicum virgatum L.)

BMC Plant Biology, 2021
Background Switchgrass ( Panicum virgatum L.) is an important bioenergy and forage crop. The outcrossing nature of switchgrass makes it infeasible to maintain a genotype through sexual propagation.
Yongqin Wang, Weihong Dong, M. Saha, M. Udvardi, Yun Kang   +4 more
semanticscholar   +1 more source