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排序方式: 共有843条查询结果,搜索用时 15 毫秒
111.
Elodie Claverie Félicien Meunier Mathieu Javaux Walid Sadok 《Physiologia plantarum》2018,162(3):290-300
Increasing evidence suggests that in crops, nocturnal water use could represent 30% of daytime water consumption, particularly in semi‐arid and arid areas. This raises the questions of whether nocturnal transpiration rates (TRN) are (1) less influenced by drought than daytime TR (TRD), (2) increased by higher nocturnal vapor pressure deficit (VPDN), which prevails in such environments and (3) involved in crop drought tolerance. In this investigation, we addressed those questions by subjecting two wheat genotypes differing in drought tolerance to progressive soil drying under two long‐term VPDN regimes imposed under naturally fluctuating conditions. A first goal was to characterize the response curves of whole‐plant TRN and TRN/TRD ratios to progressive soil drying. A second goal was to examine the effect of VPDN increase on TRN response to soil drying and on 13 other developmental traits. The study revealed that under drought, TRN was not responsive to progressive soil drying and – intriguingly – that TRN seemingly increased with drought under high VPDN consistently for the drought‐sensitive genotype. Because TRD was concomitantly decreasing with progressive drought, this resulted in TRN representing up to 70% of TRD at the end of the drydown. In addition, under drought, VPDN increase was found not to influence traits such as leaf area or stomata density. Overall, those findings indicate that TRN contribution to daily water use under drought might be much higher than previously thought, that it is controlled by specific mechanisms and that decreasing TRN under drought might be a valuable trait for improving drought tolerance. 相似文献
112.
Jordane Gavinet Bernard Prévosto Anne Bousquet-Melou Raphaël Gros Elodie Quer Virginie Baldy Catherine Fernandez 《Plant and Soil》2018,430(1-2):59-71
Background & Aims
Oak seedling establishment is difficult and may be partly explained by litter-mediated interactions with neighbors. Litter effects can be physical or chemical and result in positive or negative feedback effects for seedlings. Mediterranean species leaves contain high levels of secondary metabolites which suggest that negative litter effects could be important.Methods
Seedlings of Quercus ilex and Quercus pubescens were grown for two years in pots with natural soil and litter inputs from 6 Mediterranean woody species, artificial litter (only physical effect) or bare soil.Results
Litter types had highly different mass loss (41–80%), which correlated with soil organic C, total N and microbial activity. Litter of Q. pubescens increased soil humidity and oak seedlings aerial biomass. Litters of Cotinus coggygria and Rosmarinus officinalis, containing high quantities of phenolics and terpenes respectively, decomposed fast and led to specific soil microbial catabolic profiles but did not influence oak seedling growth, chemistry or mycorrhization rates.Conclusions
Physical litter effects through improved soil humidity seem to be predominant for oak seedling development. Despite high litter phenolics content, we detected no chemical effects on oak seedlings. Litter traits conferring a higher ability to retain soil moisture in dry periods deserve further attention as they may be critical to explain plant-soil feedbacks in Mediterranean ecosystems.113.
114.
Contribution of the β‐glucosidase BglC to the onset of the pathogenic lifestyle of Streptomyces scabies
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115.
116.
ABSTRACTThe Discoidin Domain Receptor 1 (DDR1) receptor tyrosine kinase performs pleiotropic functions in the control of cell adhesion, proliferation, survival, migration, and invasion. Aberrant DDR1 function as a consequence of either mutations or increased expression has been associated with various human diseases including cancer. Pharmacological inhibition of DDR1 results in significant therapeutic benefit in several pre-clinical cancer models. Here, we discuss the potential implication of DDR1-dependent pro-survival functions in the development of cancer resistance to chemotherapeutic regimens and speculate on the molecular mechanisms that might mediate such important feature. 相似文献
117.
Shen-Ying Zhang Nathaniel E. Clark Catherine A. Freije Elodie Pauwels Allison J. Taggart Satoshi Okada Hanna Mandel Paula Garcia Michael J. Ciancanelli Anat Biran Fabien G. Lafaille Miyuki Tsumura Aurélie Cobat Jingchuan Luo Stefano Volpi Bastian Zimmer Sonoko Sakata Alexandra Dinis Jean-Laurent Casanova 《Cell》2018,172(5):952-965.e18
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119.
Exploring the relationship between tychoparthenogenesis and inbreeding depression in the Desert Locust,Schistocerca gregaria
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Chelsea J. Little Marie‐Pierre Chapuis Laurence Blondin Elodie Chapuis Hélène Jourdan‐Pineau 《Ecology and evolution》2017,7(15):6003-6011
Tychoparthenogenesis, a form of asexual reproduction in which a small proportion of unfertilized eggs can hatch spontaneously, could be an intermediate evolutionary link in the transition from sexual to parthenogenetic reproduction. The lower fitness of tychoparthenogenetic offspring could be due to either developmental constraints or to inbreeding depression in more homozygous individuals. We tested the hypothesis that in populations where inbreeding depression has been purged, tychoparthenogenesis may be less costly. To assess this hypothesis, we compared the impact of inbreeding and parthenogenetic treatments on eight life‐history traits (five measuring inbreeding depression and three measuring inbreeding avoidance) in four laboratory populations of the desert locust, Schistocerca gregaria, with contrasted demographic histories. Overall, we found no clear relationship between the population history (illustrated by the levels of genetic diversity or inbreeding) and inbreeding depression, or between inbreeding depression and parthenogenetic capacity. First, there was a general lack of inbreeding depression in every population, except in two populations for two traits. This pattern could not be explained by the purging of inbreeding load in the studied populations. Second, we observed large differences between populations in their capacity to reproduce through tychoparthenogenesis. Only the oldest laboratory population successfully produced parthenogenetic offspring. However, the level of inbreeding depression did not explain the differences in parthenogenetic success between all studied populations. Differences in development constraints may arise driven by random and selective processes between populations. 相似文献
120.
Karine Triques Elodie Piednoir Marion Dalmais Julien Schmidt Christine Le Signor Mark Sharkey Michel Caboche Bénédicte Sturbois Abdelhafid Bendahmane 《BMC molecular biology》2008,9(1):42