Water use efficiency for grain yield in an old and two more recent maize hybrids

Nagore, María Luján; Maggiora, A. Della; Andrade, Fernando H.; Echarte, Laura

doi:10.1016/j.fcr.2017.09.013

Cited by 23 publications

(10 citation statements)

References 35 publications

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“…Similar to our results, it was reported that the yield WUE of dehydration-tolerant variety was higher than the dehydration susceptible variety and there was no varietal difference of WUE in wheat (Thapa et al, 2018). Also, the high yield WUE values of maize were also associated with their high grain yields, resulting from the high number of grains per plant (Cai et al, 2017;Nagore et al, 2017).…”

Section: Factors In Relation To Water Use Affecting Dehydration Tolersupporting

confidence: 89%

Factors related water and dry matter during pre- and post- heading in four millet species under severe water deficit

Matsuura

2019

Plant Production Science

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The objectives of this study are to clarify the relative importance of sink and related factors of dry matter and water use pre-and post-heading in four millet species under severe water deficit. Panicum miliaceum, Panicum sumatrense, Setaria glauca., and S. italica were used. Water deficit (20% soil water content) was imposed from 25 d after sowing until harvest, with 40% soil water as a control. At the heading, half of the leaf area or all leaves on each plant were removed in both the control and the water deficit treatment (Source manipulation). Water deficit treatment markedly decreased the leaf water potential of all species from −2.02 MPa (S. italica) to −1.72MPa (P. miliaceum). The grain yields of water deficit treatment in S. italica, P. miliaceum, S. glauca and P. sumatrense decreased to 62, 48, 31, and 24% of the control, respectively. Four millet species were divided to dehydration-tolerant millet (S. italica and P. miliaceum) and dehydration-susceptible millet (S. glauca and P. sumatrense) by calculating drought susceptibility index. The interspecific difference in dehydration tolerance was accounted for by the number of grains per panicle and the harvest index. The source operation showed that the sink was more important than the source. In conclusion, under severe soil drying, it was considered that S. italica and P. miliaceum showed strong dehydration tolerance because they maintained the number of grains per panicle and did not reduce dry matter production and the partitioning of dry matter to the panicle after heading. Abbreviations: CLA0: all leaves were removed at heading in the control; CLA0.5: half of the leaf area per plant was removed at heading in the control; DAS: days after sowing; DLA0: all leaves were removed at heading in the dehydration treatment; DLA0.5: half of the leaf area was removed at heading in the dry treatment; DSI: drought susceptibility index; NSC: nonstructural carbohydrate; OA: osmotic adjustment; WUE: water use efficiency.

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Section: Factors In Relation To Water Use Affecting Dehydration Tolersupporting

confidence: 89%

Factors related water and dry matter during pre- and post- heading in four millet species under severe water deficit

Matsuura

2019

Plant Production Science

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“…The hybrids Giza-168, Fine-276, and Giza-167 displayed better CWP values associated with significantly greater growth and productivity—in particular, at low water amounts—compared to the sensitive ones. Therefore, using these drought-tolerant hybrids is preferred to improve the CWP and increase the grain and biological yields principally in arid environments [ 93 , 94 , 95 , 96 ].…”

Section: Discussionmentioning

confidence: 99%

Exogenously Used 24-Epibrassinolide Promotes Drought Tolerance in Maize Hybrids by Improving Plant and Water Productivity in an Arid Environment

Desoky

Mansour

Ali

et al. 2021

Plants

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The influence of 24-epibrassinolide (EBR24), applied to leaves at a concentration of 5 μM, on plant physio-biochemistry and its reflection on crop water productivity (CWP) and other agronomic traits of six maize hybrids was field-evaluated under semi-arid conditions. Two levels of irrigation water deficiency (IWD) (moderate and severe droughts; 6000 and 3000 m3 water ha–1, respectively) were applied versus a control (well-watering; 9000 m3 water ha–1). IWD reduced the relative water content, membrane stability index, photosynthetic efficiency, stomatal conductance, and rates of transpiration and net photosynthesis. Conversely, antioxidant enzyme activities and osmolyte contents were significantly increased as a result of the increased malondialdehyde content and electrolyte leakage compared to the control. These negative influences of IWD led to a reduction in CWP and grain yield-related traits. However, EBR24 detoxified the IWD stress effects and enhanced all the above-mentioned parameters. The evaluated hybrids varied in drought tolerance; Giza-168 was the best under moderate drought, while Fine-276 was the best under severe drought. Under IWD, certain physiological traits exhibited a highly positive association with yield and yield-contributing traits or CWP. Thus, exogenously using EBR24 for these hybrids could be an effective approach to improve plant and water productivity under reduced available water in semi-arid environments.

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“…Basso and Ritchie (2018) suggested that WUE has increased over time because the grain yields have increased while water use has remained relatively constant. Nagore et al (2017) compared an older maize hybrid with more recently released hybrids and found the more recent hybrids had a WUE of 25.1 kg ha -1 mm -1 compared to 23.1 kg ha -1 mm -1 for the older hybrid. The more recent hybrids also showed a greater advantage in WUE all at soil water contents over the course of this study.…”

Section: Water Use Efficiency Trendsmentioning

confidence: 99%

Water-Use Efficiency: Advances and Challenges in a Changing Climate

2019

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Water use efficiency (WUE) is defined as the amount of carbon assimilated as biomass or grain produced per unit of water used by the crop. One of the primary questions being asked is how plants will respond to a changing climate with changes in temperature, precipitation, and carbon dioxide (CO 2 ) that affect their WUE At the leaf level, increasing CO 2 increases WUE until the leaf is exposed to temperatures exceeded the optimum for growth (i.e., heat stress) and then WUE begins to decline. Leaves subjected to water deficits (i.e., drought stress) show varying responses in WUE. The response of WUE at the leaf level is directly related to the physiological processes controlling the gradients of CO 2 and H 2 O, e.g., leaf:air vapor pressure deficits, between the leaf and air surrounding the leaf. There a variety of methods available to screen genetic material for enhanced WUE under scenarios of climate change. When we extend from the leaf to the canopy, then the dynamics of crop water use and biomass accumulation have to consider soil water evaporation rate, transpiration from the leaves, and the growth pattern of the crop. Enhancing WUE at the canopy level can be achieved by adopting practices that reduce the soil water evaporation component and divert more water into transpiration which can be through crop residue management, mulching, row spacing, and irrigation. Climate change will affect plant growth, but we have opportunities to enhance WUE through crop selection and cultural practices to offset the impact of a changing climate.

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Water use efficiency for grain yield in an old and two more recent maize hybrids

Cited by 23 publications

References 35 publications

Factors related water and dry matter during pre- and post- heading in four millet species under severe water deficit

Factors related water and dry matter during pre- and post- heading in four millet species under severe water deficit

Exogenously Used 24-Epibrassinolide Promotes Drought Tolerance in Maize Hybrids by Improving Plant and Water Productivity in an Arid Environment

Water-Use Efficiency: Advances and Challenges in a Changing Climate

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