TY  - JOUR
AU  - Verbraeken, Lennart
AU  - Wuyts, Nathalie
AU  - Mertens, Stien
AU  - Cannoot, Bernard
AU  - Maleux, Katrien
AU  - Demuynck, Kirin
AU  - De Block, Jolien
AU  - Merchie, Julie
AU  - Dhondt, Stijn
AU  - Bonaventure, Gustavo
AU  - Crafts-Brandner, Steven
AU  - Vogel, Jonathan
AU  - Bruce, Wesley
AU  - Inzé, Dirk
AU  - Maere, Steven
AU  - Nelissen, Hilde
TI  - Drought affects the rate and duration of organ growth but not inter-organ growth coordination
JO  - Plant physiology
VL  - 186
IS  - 2
SN  - 0032-0889
CY  - Rockville, Md.
PB  - Soc.
M1  - FZJ-2021-06072
SP  - 1336 - 1353
PY  - 2021
AB  - Drought at flowering and grain filling greatly reduces maize (Zea mays) yield. Climate change is causing earlier and longer-lasting periods of drought, which affect the growth of multiple maize organs throughout development. To study how long periods of water deficit impact the dynamic nature of growth, and to determine how these relate to reproductive drought, we employed a high-throughput phenotyping platform featuring precise irrigation, imaging systems, and image-based biomass estimations. Prolonged drought resulted in a reduction of growth rate of individual organs—though an extension of growth duration partially compensated for this—culminating in lower biomass and delayed flowering. However, long periods of drought did not affect the highly organized succession of maximal growth rates of the distinct organs, i.e. leaves, stems, and ears. Two drought treatments negatively affected distinct seed yield components: Prolonged drought mainly reduced the number of spikelets, and drought during the reproductive period increased the anthesis-silking interval. The identification of these divergent biomass and yield components, which were affected by the shift in duration and intensity of drought, will facilitate trait-specific breeding toward future climate-resilient crops.
LB  - PUB:(DE-HGF)16
C6  - pmid:33788927
UR  - <Go to ISI:>//WOS:000671555900044
DO  - DOI:10.1093/plphys/kiab155
UR  - https://juser.fz-juelich.de/record/904502
ER  -