Potential yield and water-use efficiency benefits in sorghum from limited maximum transpiration rate

Functional Plant Biology : FPB
Thomas R SinclairErik J van Oosterom

Abstract

Limitations on maximum transpiration rates, which are commonly observed as midday stomatal closure, have been observed even under well-watered conditions. Such limitations may be caused by restricted hydraulic conductance in the plant or by limited supply of water to the plant from uptake by the roots. This behaviour would have the consequences of limiting photosynthetic rate, increasing transpiration efficiency, and conserving soil water. A key question is whether the conservation of water will be rewarded by sustained growth during seed fill and increased grain yield. This simulation analysis was undertaken to examine consequences on sorghum yield over several years when maximum transpiration rate was imposed in a model. Yields were simulated at four locations in the sorghum-growing area of Australia for 115 seasons at each location. Mean yield was increased slightly (5-7%) by setting maximum transpiration rate at 0.4 mm h-1. However, the yield increase was mainly in the dry, low-yielding years in which growers may be more economically vulnerable. In years with yield less than ∼450 g m-2, the maximum transpiration rate trait resulted in yield increases of 9-13%. At higher yield levels, decreased yields were simulated. The yie...Continue Reading

References

Jan 5, 2002·Crop Science·A. G. CondonG. D. Farquhar

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Citations

Oct 17, 2019·Functional Plant Biology : FPB·Alexander D LevinMark A Matthews
Oct 1, 2014·Functional Plant Biology : FPB·Jana KholováVincent Vadez
Dec 1, 2013·Functional Plant Biology : FPB·Vincent VadezNouhoun Belko
Nov 14, 2018·Frontiers in Plant Science·Mura Jyostna Devi, Vangimalla R Reddy
Feb 1, 2019·Frontiers in Plant Science·Florie GosseauNicolas Langlade
May 1, 2019·Annual Review of Plant Biology·Andrew D B LeakeyDavid B Lobell
Mar 13, 2008·Physiologia Plantarum·Thomas R SinclairNoel Michele Holbrook
Feb 1, 2014·Functional Plant Biology : FPB·Sunita Choudhary, Thomas R Sinclair
Jun 1, 2012·Functional Plant Biology : FPB·Thomas R Sinclair
Sep 1, 2006·Functional Plant Biology : FPB·Ahmad M ManschadiGraeme L Hammer
Mar 7, 2014·Journal of Experimental Botany·Vincent VadezHanna Anderberg
Apr 20, 2010·Journal of Experimental Botany·Graeme L HammerRussell C Muchow
Jul 1, 2013·Functional Plant Biology : FPB·Sunita ChoudharyP V Vara Prasad
Jan 23, 2020·The Plant Journal : for Cell and Molecular Biology·Patrick Z EllsworthAsaph B Cousins
Dec 11, 2020·Journal of Experimental Botany·Megan K Bartlett, Gabriela Sinclair
Mar 30, 2021·Global Change Biology. Bioenergy·Michele FaralliClaudio Varotto
Jun 4, 2021·Journal of Experimental Botany·Vincent VadezMukkera Anjaiah
Jun 15, 2020·Plant Science : an International Journal of Experimental Plant Biology·Sunita ChoudharyVincent Vadez

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