+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Transpiration Sensitivity to Evaporative Demand Across 120 Years of Breeding of Australian Wheat Cultivars



Transpiration Sensitivity to Evaporative Demand Across 120 Years of Breeding of Australian Wheat Cultivars



Journal of Agronomy and Crop Science 203(3): 219-226



Historically, wheat yields in drought-prone Australian environments have been consistently increasing for over a century. There is currently an agreement that approximately half of that increase is attributable to breeding programmes, but their physiological basis remains poorly documented. In this investigation, we hypothesized that limited whole-plant transpiration rate (TR) under high atmospheric vapour pressure deficit (VPD) could result in advantageous water conservation and crop yield increase under south Australian conditions. Therefore, TR response to VPD was measured in the 0.9-3.2 kPa range for a group of 23 wheat cultivars that were released from 1890 to 2008. Consistent with a water-conservation hypothesis, all genotypes displayed a VPD break point (BP) in TR with increasing VPD such that TR was limited at VPD above a BP of about 2 kPa. The BP and slope of TR with increasing VPD above the break point were correlated with the year of release, although the changes were in different directions. Such changes in these transpiration parameters were independent of plant leaf area and only marginally correlated with Zadok's stages. These results indicated that selection over 120 years by breeders for yield increase unconsciously resulted in genotype selection for the expression of the limited-TR trait.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 066337689

Download citation: RISBibTeXText

DOI: 10.1111/jac.12193


Related references

Differential sensitivities of transpiration to evaporative demand and soil water deficit among wheat elite cultivars indicate different strategies for drought tolerance. Environmental and Experimental Botany 84: 1-10, 2012

Control of evaporative demand on transpiring plants: III. Transpiration and growth of cucumber under controlled evaporative demand. Biotronics 23: 105-111, 1994

High resolution mapping of traits related to whole-plant transpiration under increasing evaporative demand in wheat. Journal of Experimental Botany 67(9): 2847-2860, 2016

Transpiration sensitivities to evaporative demand and leaf areas vary with night and day warming regimes among wheat genotypes. Functional Plant Biology 40(7): 708-718, 2013

Variability in temperature-independent transpiration responses to evaporative demand correlate with nighttime water use and its circadian control across diverse wheat populations. Planta 250(1): 115-127, 2019

Increases in grain yield of wheat by breeding for an osmoregulation gene: Relationship to water supply and evaporative demand. Australian Journal of Agricultural Research 51(8): 971-978, 2000

Transpiration of container-grown Acer rubrum under conditions of high evaporative demand. Applied engineering in agriculture 15(5): 553-557, 1999

Transpiration from banana leaves in the subtropics in response to diurnal and seasonal factors and high evaporative demand. Scientia Horticulturae 37(1-2): 129-144, 1988

Higher forage yields under temperate drought explained by lower transpiration rates under increasing evaporative demand. European Journal of Agronomy 72: 91-98, 2016

Differential transpiration by three boreal tree species in response to increased evaporative demand after variable retention harvesting. Agricultural and Forest Meteorology 138(1-4): 104-119, 2006

Control of evaporative demand and transpiring plants i. sensitivities of evaporative demand to environmental factors. Biotronics 20: 53-64, 1991

Influence of soil water potential and atmospheric evaporative demand on transpiration and the energy status of water in plants. Agron J 59(1): 4-7, 1967

Peristomal transpiration and stomatal movement: a controversial view. VII. Correlation of stomatal aperture with evaporative demand and water uptake through the roots. Zeitschrift fur Pflanzenphysiologie = International journal of plant physiology 02(5): 397-413, 1981

Peristomatal transpiration and stomatal movement a controversial view 7. correlation of stomatal aperture with evaporative demand and water uptake through the roots. Zeitschrift fuer Pflanzenphysiologie 102(5): 397-414, 1981

Prevalence and importance of sensitivity to the Stagonospora nodorum necrotrophic effector SnTox3 in current Western Australian wheat cultivars. Crop and Pasture Science 62(7): 556-562, 2011