0.25
0.5
0.75
1.25
1.5
1.75
2
Strigolactones affect responses to osmotic stress and fruit ripening in crop plants
Published on Apr 17, 2018918 Views
Strigolactones (SLs) are a class carotenoid-derived molecules, originally characterized as mediators of plant signaling to soil (micro)organisms, including parasitic plants, endomycorrhizal fungi, and
Related categories
Chapter list
Strigolactones affect responses to osmotic stress and fruit ripening in crop plants03:21
The discovery of strigolactones03:36
SLs mediate biotic interaction in the rhizosphere05:14
SLs: novel plant hormones05:44
SLs control shoot and root architecture07:06
The structure of strigolactones09:18
The SL biosynthetic pathway10:44
In rice and Arabidopsis, the SL receptor D14 is a hydrolase that cleaves SL upon binding12:26
D14-like proteins act as receptors of SLs in parasitic plants and possibly of unknown SL-like ligands in Arabidopsis15:06
SL mediates adaptation of plant architecture to phosphate starvation17:22
Drought induces reduction of SL levels in Lotus roots but not in shoots19:46
Ljccd7, a Lotus japonicus CCD7 (MAX3) mutant with reduced SL biosynthesis and concentration21:40
Ljccd7 is hypersensitive to osmotic (drought) stress22:38
Experiments with Lotus mutants confirm results obtained with Arabidopsis mutants24:04
Root- and shoot-specific SL control of drought stress sensitivity investigated in tomato24:59
Grafting reveals that root-specific SL downregulation actually reduces sensitivity to drought stress26:06
In WT/SL- heterografts, drought stress downregulates SL biosynthesis in the root but upregulates biosynthesis in the shoot28:53
SL depletion in roots affects free ABA concentration30:50
Endogenous and exogenous SL levels control stomatal sensitivity to ABA33:23
A model for SL modulation under drought stress35:56
miR156: a controller of phase transition in plants36:30
miR156 also controls responses to drought stress37:09
Overexpression of miR156 in tomato (var. MicroTom) causes stomatal closure37:25
miR156 is induced by drought only when endogenous SL is available37:48
Exogenous SL is sufficient to increase miR156 in the absence of stress38:35
SL are needed for drought-induced MIR156 transcription in shoots38:52
ABCG25 localizes to the plasma membrane upon ABA treatment and is internalized upon stress40:19
Exogenously applied ABA and GR24 increase ABCG25 expression and PM localization of sGFP:ABCG2540:45
SLs affect reproductive development41:57
Fruit ripening processes are controlled by ABA42:56
Exploring ABA-SL interactions in ripening grape berries43:50
GR24 negatively affects ABA concentration in ABA-treated grape berries44:35
GR24 induces ABA degradation45:00
Control of ABA transport maybe a recurrent SL-dependent mechanism to control ABA responses?45:39
Conclusions: a complex control of drought stress responses and reproductive development by SL46:37
Application of SLs in agriculture48:00
Credits50:33