Variation Among Maize Hybrids in Response to High Vapor Pressure Deficit at High Temperatures

Shekoofa, Avat; Sinclair, Thomas R.; Messina, Carlos D.; Cooper, Mark

doi:10.2135/cropsci2015.02.0134

Cited by 48 publications

(53 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To ameliorate the impact of drought on crop yields, the critical need is commonly to improve crop performance in expectation of developing soil water deficits. The traits that appear to be particularly desirable to improve yield performance under water-deficit conditions generally are associated with limiting water use by the crop early in the growing season so that water is conserved for use later in season to sustain plant productivity during reproductive development [ 15 , 16 , 17 , 18 ]. To achieve soil water conservation early in the growing season there are two prime mechanisms for water conservation, both of which appear to be closely related to AQPs activity: (i) transpiration sensitivity to soil drying and (ii) transpiration sensitivity to high atmospheric vapor pressure deficit (VPD).…”

Section: Plant Water Usementioning

confidence: 99%

Aquaporin Activity to Improve Crop Drought Tolerance

Shekoofa

Sinclair

2018

Cells

Self Cite

View full text Add to dashboard Cite

In plants, aquaporins (AQP) occur in multiple isoforms in both plasmalemma and tonoplast membranes resulting in regulation of water flow in and out of cells, and ultimately, water transfer through a series of cells in leaves and roots. Consequently, it is not surprising that physiological and molecular studies have identified AQPs as playing key roles in regulating hydraulic conductance in roots and leaves. As a result, the activity of AQPs influences a range of physiological processes including phloem loading, xylem water exit, stomatal aperture and gas exchange. The influence of AQPs on hydraulic conductance in plants is particularly important in regulating plant transpiration rate, particularly under conditions of developing soil water-deficit stress and elevated atmospheric vapor pressure deficit (VPD). In this review, we examine the impact of AQP activity and hydraulic conductance on crop water use and the identification of genotypes that express soil water conservation as a result of these traits. An important outcome of this research has been the identification and commercialization of cultivars of peanut (Arachis hypogaea L.), maize (Zea mays L.), and soybean (Glycine max (Merr) L.) for dry land production systems.

show abstract

Section: Plant Water Usementioning

confidence: 99%

Aquaporin Activity to Improve Crop Drought Tolerance

Shekoofa

Sinclair

2018

Cells

Self Cite

View full text Add to dashboard Cite

show abstract

“…Future climate extremes are likely to strike crop growth as concurrent heat and drought events, thus setting higher demand for agricultural adaptations as the optimal breeding or management strategy may differ among stresses . A number of crop traits can be potentially adopted to ameliorate drought stress, including the limited-transpiration trait that can stabilize or even lower transpiration rates of both maize and soybean under high VPD conditions (Sinclair et al, 2010;Messina et al, 2015;Shekoofa et al, 2016). Yet limiting transpiration may bring the side effect of enhancing temperature stress, as canopy transpiration is a major pathway for latent heat flux.…”

Section: Spatial Variability In Climate Stressmentioning

confidence: 99%

The combined and separate impacts of climate extremes on the current and future US rainfed maize and soybean production under elevated CO₂

Jin

Zhuang

Wang

et al. 2017

Global Change Biology

155

View full text Add to dashboard Cite

Heat and drought are two emerging climatic threats to the US maize and soybean production, yet their impacts on yields are collectively determined by the magnitude of climate change and rising atmospheric CO concentrations. This study quantifies the combined and separate impacts of high temperature, heat and drought stresses on the current and future US rainfed maize and soybean production and for the first time characterizes spatial shifts in the relative importance of individual stress. Crop yields are simulated using the Agricultural Production Systems Simulator (APSIM), driven by high-resolution (12 km) dynamically downscaled climate projections for 1995-2004 and 2085-2094. Results show that maize and soybean yield losses are prominent in the US Midwest by the late 21st century under both Representative Concentration Pathway (RCP) 4.5 and RCP8.5 scenarios, and the magnitude of loss highly depends on the current vulnerability and changes in climate extremes. Elevated atmospheric CO partially but not completely offsets the yield gaps caused by climate extremes, and the effect is greater in soybean than in maize. Our simulations suggest that drought will continue to be the largest threat to US rainfed maize production under RCP4.5 and soybean production under both RCP scenarios, whereas high temperature and heat stress take over the dominant stress of drought on maize under RCP8.5. We also reveal that shifts in the geographic distributions of dominant stresses are characterized by the increase in concurrent stresses, especially for the US Midwest. These findings imply the importance of considering heat and drought stresses simultaneously for future agronomic adaptation and mitigation strategies, particularly for breeding programs and crop management. The modeling framework of partitioning the total effects of climate change into individual stress impacts can be applied to the study of other crops and agriculture systems.

show abstract

“…Since these experiments were performed in growth chambers, it is likely that the high temperatures (> 35°C) that were required to reach higher VPD values played a role in the observed responses. It is difficult to clarify interactions between plant VPD responses and temperature from existing literature because these interactions are often confounded experimentally (Sermons et al, 2012;Shekoofa et al, 2016). However, recently, Shekoofa et al (2016) investigated the conservation of the BP in maize lines expressing the limited transpiration trait at 32°C under temperatures up to 38°C.…”

Section: Lentil Genotypes Transpiration Response To High Vpdmentioning

confidence: 99%

“…It is difficult to clarify interactions between plant VPD responses and temperature from existing literature because these interactions are often confounded experimentally (Sermons et al, 2012;Shekoofa et al, 2016). However, recently, Shekoofa et al (2016) investigated the conservation of the BP in maize lines expressing the limited transpiration trait at 32°C under temperatures up to 38°C. Interestingly, this study reported that some maize hybrids had lost the VPD breakpoints when temperature increased from 36 to 38°C.…”

Section: Lentil Genotypes Transpiration Response To High Vpdmentioning

confidence: 99%

Relevance of limited-transpiration trait for lentil ( Lens culinaris Medik.) in South Asia

Guiguitant

Marrou

Vadez

et al. 2017

Field Crops Research

Self Cite

View full text Add to dashboard Cite

Drought is one of the most important environmental factors that limit crop production. It has been hypothesized that a limited-transpiration trait under high vapor pressure deficit (VPD) is a mechanism for water conservation leading to yield increase under water-deficit conditions. The first research objective was to compare expression of limited-transpiration (TR lim) in lentil (Lens culinaris Medik.) observed by whole-plant measurements in controlled environments and under natural conditions outdoors during a high VPD period. Seventeen lentil genotypes were studied. All genotypes showed a linear increase with increasing VPD under natural conditions. Differences were observed among genotypes in their expression of TR lim with increasing VPD in the controlled environment. Almost all genotypes showed a VPD breakpoint at approximately 3.4 kPa. A simulation analysis was conducted across South Asia to identify where, how often, and how much this trait in lentil would benefit farmers with four different VPD breakpoint scenarios (VPD breakpoint at 3.4, 2.2, 1.1 kPa, and VPD-insensitive). Results showed that the limited-transpiration trait at a low simulated threshold (1.1 kPa) can result in improved lentil performance in drought-prone environments and that the impact of the trait on lentil productivity varies with geography and environment. The largest average yield increase was simulated for drought-prone environments (250 g m −2). Outcomes from this simulation study provide insights into the plausible role of the limited-transpiration trait under high VPD in future lentil genetic improvement and implies that a search for germplasm with a breakpoint as low as 1.1 kPa needs to be made.

show abstract

Variation Among Maize Hybrids in Response to High Vapor Pressure Deficit at High Temperatures

Cited by 48 publications

References 14 publications

Aquaporin Activity to Improve Crop Drought Tolerance

Aquaporin Activity to Improve Crop Drought Tolerance

The combined and separate impacts of climate extremes on the current and future US rainfed maize and soybean production under elevated CO₂

Relevance of limited-transpiration trait for lentil ( Lens culinaris Medik.) in South Asia

Contact Info

Product

Resources

About

Variation Among Maize Hybrids in Response to High Vapor Pressure Deficit at High Temperatures

Cited by 48 publications

References 14 publications

Aquaporin Activity to Improve Crop Drought Tolerance

Aquaporin Activity to Improve Crop Drought Tolerance

The combined and separate impacts of climate extremes on the current and future US rainfed maize and soybean production under elevated CO2

Relevance of limited-transpiration trait for lentil ( Lens culinaris Medik.) in South Asia

Contact Info

Product

Resources

About

The combined and separate impacts of climate extremes on the current and future US rainfed maize and soybean production under elevated CO₂