TY  - JOUR
A1  - Cordeiro, Andre M.
A1  - Andrade, Luis
A1  - Monteiro, Catarina C.
A1  - Leitao, Guilherme
A1  - Wigge, Philip Anthony
A1  - Saibo, Nelson J. M.
T1  - Phytochrome-interacting factors
BT  - a promising tool to improve crop productivity
JF  - Journal of experimental botany
N2  - Review exploring the regulation of PHYTOCHROME-INTERACTING FACTORS by light, their role in abiotic stress tolerance and plant architecture, and their influence on crop productivity. 
Light is a key determinant for plant growth, development, and ultimately yield. Phytochromes, red/far-red photoreceptors, play an important role in plant architecture, stress tolerance, and productivity. In the model plant Arabidopsis, it has been shown that PHYTOCHROME-INTERACTING FACTORS (PIFs; bHLH transcription factors) act as central hubs in the integration of external stimuli to regulate plant development. Recent studies have unveiled the importance of PIFs in crops. They are involved in the modulation of plant architecture and productivity through the regulation of cell division and elongation in response to different environmental cues. These studies show that different PIFs have overlapping but also distinct functions in the regulation of plant growth. Therefore, understanding the molecular mechanisms by which PIFs regulate plant development is crucial to improve crop productivity under both optimal and adverse environmental conditions. In this review, we discuss current knowledge of PIFs acting as integrators of light and other signals in different crops, with particular focus on the role of PIFs in responding to different environmental conditions and how this can be used to improve crop productivity.
KW  - Cold
KW  - drought
KW  - grain size
KW  - heat
KW  - light signaling
KW  - phytochrome
KW  - PIF
KW  - plant architecture
KW  - plant breeding
KW  - plant yield
KW  - salinity
Y1  - 2022
U6  - https://doi.org/10.1093/jxb/erac142
SN  - 0022-0957
SN  - 1460-2431
VL  - 73
IS  - 12
SP  - 3881
EP  - 3897
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Bachmann, Jennifer
A1  - Heimbach, Tabea
A1  - Hassenrück, Christiane
A1  - Kopprio, German A.
A1  - Iversen, Morten Hvitfeldt
A1  - Grossart, Hans-Peter
A1  - Gärdes, Astrid
T1  - Environmental Drivers of Free-Living vs. Particle-Attached Bacterial Community Composition in the Mauritania Upwelling System
JF  - Frontiers in microbiology
N2  - Saharan dust input and seasonal upwelling along North-West Africa provide a model system for studying microbial processes related to the export and recycling of nutrients. This study offers the first molecular characterization of prokaryotic particle-attached (PA; > 3.0 mu m) and free-living (FL; 0.2-3.0 mu m) players in this important ecosystem during August 2016. Environmental drivers for alpha-diversity, bacterial community composition, and differences between FL and PA fractions were identified. The ultra-oligotrophic waters off Senegal were dominated by Cyanobacteria while higher relative abundances of Alphaproteobacteria, Bacteroidetes, Verrucomicrobia, and Planctomycetes (known particle-degraders) occurred in the upwelling area. Temperature, proxy for different water masses, was the best predictor for changes in FL communities. PA community variation was best explained by temperature and ammonium. Bray Curtis dissimilarities between FL and PA were generally very high and correlated with temperature and salinity in surface waters. Greatest similarities between FL and PA occurred at the deep chlorophyll maximum, where bacterial substrate availability was likely highest. This indicates that environmental drivers do not only influence changes among FL and PA communities but also differences between them. This could provide an explanation for contradicting results obtained by different studies regarding the dissimilarity/similarity between FL and PA communities and their biogeochemical functions.
KW  - prokaryotes
KW  - biodiversity
KW  - microbial ecology
KW  - alpha diversity
KW  - Bray Curtis dissimilarity
KW  - temperature
KW  - salinity
KW  - 16S rRNA Illumina amplicon sequencing
Y1  - 2018
U6  - https://doi.org/10.3389/fmicb.2018.02836
SN  - 1664-302X
VL  - 9
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  -