نتایج جستجو برای: seed establishment

تعداد نتایج: 139911  

Journal: :The Journal of animal ecology 2016
Zhishu Xiao Zhibin Zhang

It is well known that direct effects of seed predators or dispersers can have strong effects on seedling establishment. However, we have limited knowledge about the indirect species interactions between seeds of different species that are mediated by shared seed predators and/or dispersers and their consequences for plant demography and diversity. Because scatter-hoarding rodents as seed disper...

Extended Abstract Introduction: Cow tail (Smirnovia iranica) is considered a valuable shrub species indigenous and adapted to the sandy lands of the Iranian central regions which besides playing an essential role in the desert cover for soil protection and of forage production, is considered important due to its great medicinal values. Considering the fact that seed germination of this plant d...

Journal: :Journal American Society of Mining and Reclamation 1991

Journal: :یافته های تحقیقاتی در گیاهان زراعی و باغی 0
محسن آذرنیا حمیدرضا عیسوند دانشکده کشاورزی دانشگاه لرستان

there are several methods to increase crops yield, including use of high quality seeds. seed priming is a simple and low-cost method to increase seed quality, if be done right, will lead to increasing plant performance and yield. seed priming treatment applied before planting to enhance germination parameters, seedling establishment and etc. primed seeds get some physiological and biochemical c...

Journal: :Ecology 2012
Mary Bricker John Maron

Loss of seeds to consumers is common in plant communities, but the degree to which these losses influence plant abundance or population growth is often unclear. This is particularly the case for postdispersal seed predation by rodents, as most studies of rodent seed predation have focused on the sources of spatiotemporal variation in seed loss but not quantified the population consequences of t...

2014
Pimonrat Tiansawat Adam S. Davis Mark A. Berhow Paul-Camilo Zalamea James W. Dalling

The seed stage is often critical in determining the regeneration success of plants. Seeds must survive an array of seed predators and pathogens and germinate under conditions favourable for seedling establishment. To maximise recruitment success plants protect seeds using a diverse set of chemical and physical defences. However, the relationship between these defence classes, and their associat...

2016
Fiona J. Thomson Tony D. Auld Daniel Ramp Richard T. Kingsford

The dispersal capacity of plant species that rely on animals to disperse their seeds (biotic dispersal) can alter with changes to the populations of their keystone dispersal vectors. Knowledge on how biotic dispersal systems vary across landscapes allows better understanding of factors driving plant persistence. Myrmecochory, seed dispersal by ants, is a common method of biotic dispersal for ma...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Fabián E Vaistij Yinbo Gan Steven Penfield Alison D Gilday Anuja Dave Zhesi He Eve-Marie Josse Giltsu Choi Karen J Halliday Ian A Graham

Freshly matured seeds exhibit primary dormancy, which prevents germination until environmental conditions are favorable. The establishment of dormancy occurs during seed development and involves both genetic and environmental factors that impact on the ratio of two antagonistic phytohormones: abscisic acid (ABA), which promotes dormancy, and gibberellic acid, which promotes germination. Althoug...

Journal: :Anais da Academia Brasileira de Ciencias 2013
Edson Simão Adriana T Nakamura Massanori Takaki

This study evaluated the contributions of Styrax camporum seed morphology (size of seeds, presence or absence of endocarp attached to the seed), different substrates (filter paper, vermiculite, sand and the soils of cerrado s. str., cerradão and a riparian forest), different water potentials (0, -0.1, -0.2, -0.3, -0.4 and -0.5 MPa), light and temperature to seed germination. Seed size did not a...

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