Biomass allocation in tomato (Lycopersicon esculentum) plants grown under partial rootzone drying: enhancement of root growth

Functional Plant Biology : FPB
Darren M MingoIan C Dodd

Abstract

Tomato (Lycopersicon esculentum Mill.) plants were grown in either a glasshouse (GH) or a controlled environment cabinet (CEC) to assess the effects of partial rootzone drying (PRD) on biomass allocation. Control and PRD plants received the same amounts of water. In control plants, water was equally distributed between two compartments of a split-root system. In PRD plants, only one compartment was watered while the other was allowed to dry. At the end of each drying cycle, wet and dry compartments were alternated. In the GH, total biomass did not differ between PRD and control plants after four cycles of PRD, but PRD increased root biomass by 55% as resources were partitioned away from shoot organs. In the CEC, leaf water potential did not differ between treatments at the end of either of two cycles of PRD, but stomatal conductance of PRD plants was 20% less at the end of the first cycle than at the beginning. After two cycles of PRD in the CEC, biomass did not differ between PRD and control plants, but PRD increased root biomass by 19% over the control plants. The promotion of root biomass in PRD plants was associated with the alternation of wet and dry compartments, with increased root biomass occurring in the re-watered com...Continue Reading

References

Sep 28, 2000·Journal of Experimental Botany·M StollP Dry
Dec 14, 2002·Plant Physiology·Pierre MartreMaarten J Chrispeels
Jul 1, 2003·Functional Plant Biology : FPB·Tiago P Dos SantosM Manuela Chaves

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Citations

Sep 10, 2020·Journal of Experimental Botany·Ying LiWeifeng Xu
Feb 6, 2020·International Journal of Environmental Research and Public Health·Jingwei WangWenquan Niu
Jul 27, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J I L MorisonW J Davies
Apr 16, 2015·Journal of Experimental Botany·Taisheng DuWilliam J Davies
Jun 6, 2009·Journal of Experimental Botany·Ian C Dodd
Jan 30, 2015·Journal of Experimental Botany·Ian C DoddMartin S A Blackwell
Mar 13, 2018·Journal of Experimental Botany·Daniela Dietrich
Jan 26, 2021·Plant Science : an International Journal of Experimental Plant Biology·Victor D'Amico-DamiãoRogério F Carvalho
Jan 12, 2021·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·A M AbdelmoghnyV N Waghmare

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