Exogenous carbon source supplementation counteracts root and hypocotyl growth limitations under increased cotyledon shading, with glucose and sucrose differentially modulating growth curves

0552933 - ÚEB 2022 RIV US eng J - Journal Article
García-González, Judith - Lacek, Jozef - Weckwerth, W. - Retzer, Katarzyna
Exogenous carbon source supplementation counteracts root and hypocotyl growth limitations under increased cotyledon shading, with glucose and sucrose differentially modulating growth curves.
Plant Signaling & Behavior. Roč. 16, č. 11 (2021), č. článku e1969818. ISSN 1559-2316. E-ISSN 1559-2324
R&D Projects: GA MŠMT(CZ) EF16_019/0000738; GA ČR(CZ) GJ19-13375Y; GA MŠMT(CZ) LM2018129
Institutional support: RVO:61389030
Keywords : Arabidopsis thaliana * carbon source * dark grown root * drootsystem * etiolated * hypocotyl growth * illumination * root growth * shaded cotyledons
OECD category: Biochemistry and molecular biology
Impact factor: 2.734, year: 2021
Method of publishing: Open access
http://doi.org/10.1080/15592324.2021.1969818

Plant growth is continuously modulated by endogenous and exogenous stimuli. By no means the only, but well described, signaling molecules produced in plants and distributed through the plant body to orchestrate efficient growth are photosynthates. Light is a potent exogenous stimulus that determines, first, the rate of photosynthesis, but also the rate of plant growth. Root meristem activity is reduced with direct illumination but enhanced with increased sugar levels. With reduced cotyledon illumination, the seedling increases hypocotyl elongation until adequate light exposure is again provided. If endogenous carbon sources are limited, this leads to a temporary inhibition of root growth. Experimental growth conditions include exogenous supplementation of sucrose or glucose in addition to culturing seedlings under light exposure in Petri dishes. We compared total root length and hypocotyl elongation of Arabidopsis thaliana wild type Col-0 in response to illumination status and carbon source in the growth medium. Overall, sucrose supplementation promoted hypocotyl and root length to a greater extent than glucose supplementation. Glucose promoted root length compared to non-supplemented seedlings especially when cotyledon illumination was greatly reduced.
Permanent Link: http://hdl.handle.net/11104/0327998