The wheat ABA receptor gene TaPYL1‐1B contributes to drought tolerance and grain yield by increasing water‐use efficiency

Drought stress is an important limitation to the growth and grain yield of pearl millet in arid and semi-arid regions of the world. Potassium iodide, a senescing agent, was used as a screening tool for evaluating drought tolerance of 22 strains of pearl millet at the grain development stage (grain filling) under glasshouse conditions. In order to use potassium iodide as a selection method in breeding programs for improvement of drought tolerance, the technique was compared with some drought evaluating parameters such as water retention capability, osmotic adjustment, photosynthetic capacity and water-use efficiency. Application of a 0.3% solution of potassium iodide at anthesis was very effective in causing drought stress, and hence grain yield reduction, in pearl millet. It showed a significant association with water deficit in growth attributes such as fresh and dry weights of shoots, and grain yield. Osmotic adjustment, water retention capability (decrease in weight of excised leaves during 5-h drying period), photosynthetic rate, and single-leaf water-use efficiency (net CO2 assimilation rate/transpiration) did not show positive relationships with the degree of drought tolerance measured using potassium iodide spray or water-deficit treatment. A large amount of variation in drought tolerance observed in 22 lines of pearl millet can be of considerable practical value. For example, the 3 lines ICMP-83720, ICMV-9413 and ICMV-94472, ranked as highly drought tolerant on the basis of their overall growth and physiological performance, and could be of direct use under mild drought conditions.

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Effects of Supplemental Irrigation on Water Consumption Characteristics, Grain Yield and Water Use Efficiency in Winter Wheat under Different Soil Moisture Conditions at Seeding Stage

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1006.2017.01357 ◽

2017 ◽

Vol 43 (9) ◽

pp. 1357 ◽

Cited By ~ 3

Author(s):

Xiang LIN ◽

Dong WANG

Keyword(s):

Soil Moisture ◽

Winter Wheat ◽

Grain Yield ◽

Water Use Efficiency ◽

Water Use ◽

Water Consumption ◽

Supplemental Irrigation ◽

Use Efficiency ◽

Moisture Conditions

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Effects of Ridge Mulching with Side-dressing on Grain Yield, Protein Content and Water Use Efficiency in Dryland Wheat

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1006.2017.00899 ◽

2017 ◽

Vol 43 (6) ◽

pp. 899 ◽

Cited By ~ 1

Author(s):

Ming HUANG ◽

Zhao-Hui WANG ◽

Lai-Chao LUO ◽

Sen WANG ◽

Ming BAO ◽

...

Keyword(s):

Grain Yield ◽

Water Use Efficiency ◽

Protein Content ◽

Water Use ◽

Use Efficiency

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Optimizing Grain Yield and Water Use Efficiency Based on the Relationship between Leaf Area Index and Evapotranspiration

Agriculture ◽

10.3390/agriculture11040313 ◽

2021 ◽

Vol 11 (4) ◽

pp. 313

Author(s):

Guoqiang Zhang ◽

Bo Ming ◽

Dongping Shen ◽

Ruizhi Xie ◽

Peng Hou ◽

...

Keyword(s):

Grain Yield ◽

Water Use Efficiency ◽

Leaf Area Index ◽

Water Use ◽

Plant Density ◽

Maize Yield ◽

Area Index ◽

Irrigation Level ◽

Use Efficiency ◽

The Relationship

Achieving optimal balance between maize yield and water use efficiency is an important challenge for irrigation maize production in arid areas. In this study, we conducted an experiment in Xinjiang China in 2016 and 2017 to quantify the response of maize yield and water use to plant density and irrigation schedules. The treatments included four irrigation levels: 360 (W1), 480 (W2), 600 (W3), and 720 mm (W4), and five plant densities: 7.5 (D1), 9.0 (D2), 10.5 (D3), 12.0 (D4), and 13.5 plants m−2 (D5). The results showed that increasing the plant density and the irrigation level could both significantly increase the leaf area index (LAI). However, LAI expansion significantly increased evapotranspiration (ETa) under irrigation. The combination of irrigation level 600 mm (W3) and plant density 12.0 plants m−2 (D4) produced the highest maize yield (21.0–21.2 t ha−1), ETa (784.1–797.8 mm), and water use efficiency (WUE) (2.64–2.70 kg m−3), with an LAI of 8.5–8.7 at the silking stage. The relationship between LAI and grain yield and evapotranspiration were quantified, and, based on this, the relationship between water use and maize productivity was analyzed. Moreover, the optimal LAI was established to determine the reasonable irrigation level and coordinate the relationship between the increase in grain yield and the decrease in water use efficiency.

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Increase maize productivity and water use efficiency through application of potassium silicate under water stress

Scientific Reports ◽

10.1038/s41598-020-80656-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

M. A. Gomaa ◽

Essam E. Kandil ◽

Atef A. M. Zen El-Dein ◽

Mamdouh E. M. Abou-Donia ◽

Hayssam M. Ali ◽

...

Keyword(s):

Grain Yield ◽

Water Use Efficiency ◽

Water Deficit ◽

Water Use ◽

Field Experiments ◽

Foliar Application ◽

Potassium Silicate ◽

Water Deficit Stress ◽

Maize Productivity ◽

Use Efficiency

AbstractIn Egypt, water shortage has become a key limiting factor for agriculture. Water-deficit stress causes different morphological, physiological, and biochemical impacts on plants. Two field experiments were carried out at Etay El-Baroud Station, El-Beheira Governorate, Agriculture Research Center (ARC), Egypt, to evaluate the effect of potassium silicate (K-silicate) of maize productivity and water use efficiency (WUE). A split-plot system in the four replications was used under three irrigation intervals during the 2017 and 2018 seasons. Whereas 10, 15, and 20 days irrigation intervals were allocated in main plots, while the three foliar application treatments of K-silicate (one spray at 40 days after sowing; two sprays at 40 and 60 days; and three sprays at 40, 60, and 80 days, and a control (water spray) were distributed in the subplots. All the treatments were distributed in 4 replicates. The results indicated that irrigation every 15 days gave the highest yield in both components and quality. The highly significant of (WUE) under irrigation every 20 days. Foliar spraying of K-silicate three times resulted in the highest yield. Even under water-deficit stress, irrigation every fifteen days combined with foliar application of K-silicate three times achieved the highest values of grain yield and its components. These results show that K-silicate treatment can increase WUE and produce high grain yield requiring less irrigation.

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