scholarly journals The Circadian Clock Influences the Long-Term Water Use Efficiency of Arabidopsis

2020 ◽  
Vol 183 (1) ◽  
pp. 317-330 ◽  
Author(s):  
Noriane M. L. Simon ◽  
Calum A. Graham ◽  
Nicholas E. Comben ◽  
Alistair M. Hetherington ◽  
Antony N. Dodd
Keyword(s):  
Circadian Clock ◽  
Water Use Efficiency ◽  
Water Use ◽  
Use Efficiency

scholarly journals The circadian clock contributes to the long-term water use efficiency of Arabidopsis

2019 ◽  
Author(s):  
Noriane M. L. Simon ◽  
Calum A. Graham ◽  
Nicholas E. Comben ◽  
Alistair M. Hetherington ◽  
Antony N. Dodd
Keyword(s):  
Circadian Clock ◽  
Water Use Efficiency ◽  
Water Use ◽  
Biomass Accumulation ◽  
Time Of Day ◽  
Circadian Oscillator ◽  
Circadian Regulation ◽  
Use Efficiency ◽  
The Impact

AbstractIn plants, water use efficiency is a complex trait derived from numerous physiological and developmental characteristics. Here, we investigated the involvement of circadian regulation in long-term water use efficiency. Circadian rhythms are generated by the circadian oscillator, which provides a cellular measure of the time of day. In plants, the circadian oscillator contributes to the regulation of many aspects of physiology, including stomatal opening, the rate of photosynthesis, carbohydrate metabolism and developmental processes. We investigated in Arabidopsis the impact of the misregulation of genes encoding a large number of components of the circadian oscillator upon whole plant, long-term water use efficiency. From this, we identified a role for the circadian oscillator in water use efficiency. This appears to be due to contributions of the circadian clock to the control of transpiration and biomass accumulation. We also identified that the circadian oscillator within guard cells can contribute to long-term water use efficiency. Our experiments indicate that knowledge of circadian regulation will be important for developing future crops that use water more efficiently.One-sentence summaryThe circadian clock in Arabidopsis makes an important contribution to long-term water use efficiency.

scholarly journals Overexpression of MdATG8i improves water use efficiency in transgenic apple by modulating photosynthesis, osmotic balance, and autophagic activity under moderate water deficit

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Xin Jia ◽  
Ke Mao ◽  
Ping Wang ◽  
Yu Wang ◽  
Xumei Jia ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Deficit ◽  
Water Use ◽  
Photosynthetic Capacity ◽  
Critical Role ◽  
Drought Conditions ◽  
Moderate Drought ◽  
Use Efficiency ◽  
Autophagic Activity

AbstractWater deficit is one of the major limiting factors for apple (Malus domestica) production on the Loess Plateau, a major apple cultivation area in China. The identification of genes related to the regulation of water use efficiency (WUE) is a crucial aspect of crop breeding programs. As a conserved degradation and recycling mechanism in eukaryotes, autophagy has been reported to participate in various stress responses. However, the relationship between autophagy and WUE regulation has not been explored. We have shown that a crucial autophagy protein in apple, MdATG8i, plays a role in improving salt tolerance. Here, we explored its biological function in response to long-term moderate drought stress. The results showed that MdATG8i-overexpressing (MdATG8i-OE) apple plants exhibited higher WUE than wild-type (WT) plants under long-term moderate drought conditions. Plant WUE can be increased by improving photosynthetic efficiency. Osmoregulation plays a critical role in plant stress resistance and adaptation. Under long-term drought conditions, the photosynthetic capacity and accumulation of sugar and amino acids were higher in MdATG8i-OE plants than in WT plants. The increased photosynthetic capacity in the OE plants could be attributed to their ability to maintain optimal stomatal aperture, organized chloroplasts, and strong antioxidant activity. MdATG8i overexpression also promoted autophagic activity, which was likely related to the changes described above. In summary, our results demonstrate that MdATG8i-OE apple lines exhibited higher WUE than WT under long-term moderate drought conditions because they maintained robust photosynthesis, effective osmotic adjustment processes, and strong autophagic activity.

scholarly journals Soil water cycle and crop water use efficiency after long-term nitrogen fertilization in Loess Plateau

2012 ◽  
Vol 59 (No. 1) ◽  
pp. 1-7 ◽  
Author(s):  
B. Wang ◽  
W. Liu ◽  
Q. Xue ◽  
T. Dang ◽  
C. Gao ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Soil Water ◽  
Water Use ◽  
Water Cycle ◽  
Triticum Aestivum L ◽  
Growing Seasons ◽  
Water Recharge ◽  
Use Efficiency ◽  
N Management

The objective of this study was to investigate the effect of nitrogen (N) management on soil water recharge, available soil water at sowing (ASWS), soil water depletion, and wheat (Triticum aestivum L.) yield and water use efficiency (WUE) after long-term fertilization. We collected data from 2 experiments in 2 growing seasons. Treatments varied from no fertilization (CK), single N or phosphorus (P), N and P (NP), to NP plus manure (NPM). Comparing to CK and single N or P treatments, NP and NPM reduced rainfall infiltration depth by 20–60 cm, increased water recharge by 16–21 mm, and decreased ASWS by 89–133 mm in 0–300 cm profile. However, crop yield and WUE continuously increased in NP and NPM treatments after 22 years of fertilization. Yield ranged from 3458 to 3782 kg/ha in NP or NPM but was 1246–1531 kg/ha in CK and single N or P. WUE in CK and single N or P treatments was < 6 kg/ha/mm but increased to 12.1 kg/ha/mm in a NP treatment. The NP and NPM fertilization provided benefits for increased yield and WUE but resulted in lower ASWS. Increasing ASWS may be important for sustainable yield after long-term fertilization.

Physiological foundation for the differences of long-term water use efficiency among Populus deltoides clones

2006 ◽  
Vol 26 (7) ◽  
pp. 2079-2086 ◽  
Author(s):  
Fengjun Zhao ◽  
Yingbai Shen ◽  
Rongfu Gao ◽  
Xiaohua Su ◽  
Bingyu Zhang
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Populus Deltoides ◽  
Use Efficiency

The effect of long-term atmospheric CO2 enrichment on the intrinsic water-use efficiency of sour orange trees

Chemosphere ◽  
2003 ◽  
Vol 50 (2) ◽  
pp. 217-222 ◽  
Author(s):  
S.W. Leavitt ◽  
S.B. Idso ◽  
B.A. Kimball ◽  
J.M. Burns ◽  
A. Sinha ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Co2 Enrichment ◽  
Atmospheric Co2 ◽  
Sour Orange ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency ◽  
Orange Trees

Responses of CO2 Assimilation, Transpiration and Water Use Efficiency to Long-Term Elevated CO2 in Perennial C3 Xeric Loess Steppe Species

1996 ◽  
Vol 148 (3-4) ◽  
pp. 356-361 ◽  
Author(s):  
Zoltán Tuba ◽  
Kálmán Szente ◽  
Zoltán Nagy ◽  
Zsolt Csintalan ◽  
Judit Koch
Keyword(s):  
Water Use Efficiency ◽  
Elevated Co2 ◽  
Water Use ◽  
Co2 Assimilation ◽  
Steppe Species ◽  
Use Efficiency
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