Results 51 to 60 of about 119,944 (359)
Cells, 2020 The oocyte faces a particular challenge in terms of gene regulation. When oocytes resume meiosis at the end of the growth phase and prior to ovulation, the condensed chromatin state prevents the transcription of genes as they are required.
Marie Christou-Kent +4 more
doaj +1 more source
The Fertilisation of Linum [PDF]
Nature, 1902 IN the Proceedings of the Academy of Natural Sciences of Philadelphia for 1902, pp. 33–36, is a very interesting paper by the late Mr. Thomas Meehan, treating of some points in the life-history of certain plants. On p. 36, Mr. Meehan says:—“Mr. Darwin once stated that one might as well use organic dust as to endeavour to get seeds of Linum pereune by ...
openaire +2 more sources
Microalgae scatter off solid surfaces by hydrodynamic and contact forces [PDF]
Phys. Rev. Lett. 115, 258102 (2015), 2015 Interactions between microorganisms and solid boundaries play an important role in biological processes, like egg fertilisation, biofilm formation and soil colonisation, where microswimmers move within a structured environment. Despite recent efforts to understand their origin, it is not clear whether these interactions can be understood as ...
arxiv +1 more source
Nitrogen forms affect root structure and water uptake in the hybrid poplar [PDF]
, 2011 The study analyses the effects of two different forms of nitrogen fertilisation (nitrate and ammonium) on root structure and water uptake of two hybrid poplar (Populus maximowiczii x P. balsamifera) clones in a field experiment.
A Clemensson-Lindell +47 more
core +2 more sources
Current Issues in Molecular Biology, 2022 Zinc (in the form of Zn2+) is necessary for male fertility. Both Zn2+ quantity and its localisation have been detected in seminal plasma and ejaculated spermatozoa, suggesting its active uptake via zinc import transporters (ZIPs).
Isidora Protic +4 more
doaj +1 more source
Fertilisation of Dictamnus [PDF]
Nature, 1872 AN arrangement for the distribution of the pollen of Dictamnus Fraxinella, which I noticed last June, may interest some of the botanical readers of NATURE. The plants will shortly be in flower, so that any one who is curious about the matter can see it for himself.
openaire +3 more sources
Research on variable rate fertilisation machine based on big data analysis
Acta Agriculturae Scandinavica. Section B, Soil and Plant Science, 2022 In order to improve the effect of intelligent fertilisation, according to actual fertilisation needs, this paper combines big data technology to perform data analysis, and designs a variable fertilisation mechanical structure that can be used for mixed ...
Fang Gao, Hongchang Li
doaj +1 more source
Fertilisation of the Pansy [PDF]
Nature, 1873 I AM glad to be able to confirm, to-some extent, from observation, Mr. Bennett's theory of the fertilisation of the Pansy, given in NATURE, vol. viii. p. 49. I watched a considerable number of specimens of Viola tricolor on a grassy hill-top where the smaller insects were very numerous and busy, and twice saw them entered by a minute fly.
openaire +3 more sources
The pain of a new idea: Do Late Bloomers response to Extension Service in Rural Ethiopia? [PDF]
arXiv, 2020 The paper analyses the efficiency of extension programs in the adoption of chemical fertilisers in Ethiopia between 1994 and 2004. Fertiliser adoption provides a suitable strategy to ensure and stabilize food production in remote vulnerable areas. Extension services programs have a long history in supporting the application of fertiliser.
arxiv
Population and species neighbor identity impact trait–trait relationships and plant performance
Population Ecology, EarlyView.We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx +2 more
wiley +1 more source