Abstract：
:We show that the chemotactic movements of colonies of the starving amoeba Dictyostelium discoideum are driven by a force that depends on both the direction of propagation (directional sensing) of reaction-diffusion chemotactic waves and on the gradient of the concentration of the chemoattractant, solving the chemotactic wave paradox. It is shown that the directional sensing of amoebae is due to the sensitivity of the cells to the time variation of the concentration of the chemoattractant combined with its spatial gradient. It is also shown that chemotaxis exclusively driven by local concentration gradient leads to unstable local motion, preventing cells from aggregation. These findings show that the formation of mounds, which initiate multicellularity in Dictyostelium discoideum, is caused by the sensitivity of the amoebae due to three factors, namely, to the direction of propagation of the chemoattractant, to its spatial gradient, and to the emergence of cAMP "emitting centres", responsible for the local accumulation of the amoebae.
journal_name
C R Bioljournal_title
Comptes rendus biologiesauthors
Dilão R,Hauser MJdoi
10.1016/j.crvi.2013.10.008subject
Has Abstractpub_date
2013-11-01 00:00:00pages
565-71issue
11-12eissn
1631-0691issn
1768-3238pii
S1631-0691(13)00203-5journal_volume
336pub_type
杂志文章abstract：:The Mediterranean stone pine Pinus pinea L. (gymnosperm, Pinaceae) is much appreciated for its seed production, widely used in food preparation in the Mediterranean Basin. Seeds contain 25% proteins on a dry-weight basis. Pinus pinea accumulate globulins as major storage proteins in seeds (75% of total storage protein...
journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
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doi：10.1016/j.crvi.2007.04.006
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
doi：10.1016/j.crvi.2009.01.005
更新日期：2009-06-01 00:00:00
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
doi：10.1016/s1631-0691(02)01452-x
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journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
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journal_title：Comptes rendus biologies
pub_type： 杂志文章,评审
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journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
pub_type： 杂志文章,评审
doi：10.1016/j.crvi.2004.05.009
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
doi：10.1016/j.crvi.2006.11.005
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
doi：10.1016/j.crvi.2016.04.002
更新日期：2016-05-01 00:00:00
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journal_title：Comptes rendus biologies
pub_type： 杂志文章,评审
doi：10.1016/j.crvi.2003.05.002
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
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abstract：:Although there are many types of epilepsy of both genetic and acquired forms, temporal lobe epilepsy (TLE) with hippocampal sclerosis is probably the single most common human epilepsy, and the one most intensely studied. Despite a wealth of descriptive data obtained from patient histories, imaging techniques, electroe...
journal_title：Comptes rendus biologies
pub_type： 杂志文章,评审
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journal_title：Comptes rendus biologies
pub_type： 杂志文章,评审
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journal_title：Comptes rendus biologies
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pub_type： 历史文章,杂志文章
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journal_title：Comptes rendus biologies
pub_type： 杂志文章,评审
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journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
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abstract：:An efficient method of regeneration for antidiabetic plant (Stevia rebaudiana) has been established for healthy biomass and main steviol glycosides (SGs) production, using different PGRs and agar concentrations. Higher callus induction (93.3%) was recorded when leaf explants were placed on an MS medium supplemented wi...
journal_title：Comptes rendus biologies
pub_type： 杂志文章
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journal_title：Comptes rendus biologies
pub_type： 杂志文章,评审
doi：10.1016/s1631-0691(03)00017-9
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journal_title：Comptes rendus biologies
pub_type： 杂志文章
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更新日期：2017-04-01 00:00:00
