Responses of photosynthesis, dry mass and carbon isotope discrimination in winter wheat to different irrigation depths

Zheng, Lihua; J., J.; Sun, Xihuan; Guo, Xianghong; Jiang, J.P.; Ruo-en, Ren; Zhang, X. L.

doi:10.1007/s11099-018-0833-5

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…The typical variable assessed at this level of organization is the RMD along the soil profile, as it allows monitoring and quantifying root presence in soils, especially in experimental containers that simulate canopies. Although there are studies that assessed this trait in crops, such as soybean, rice, barley, and wheat, most of them are related to the effect of soil compaction and fertilization regimes (Heeraban & Juma, 1993; Mehrabi et al., 2021; Mohanty et al., 2007; Pantuwan et al., 1996; Zheng et al., 2018). Regrettably, few studies have quantified canopy‐level RMD during and after waterlogging (i.e., recovery), leading to limited knowledge about root system responses to waterlogging (Huang et al., 2021; Pordel et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

Waterlogging tolerance of winter crops: Root mass density and canopy dynamics

2023

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Waterlogging has become an increasingly important abiotic stress. To develop strategies for mitigating its effects, it is crucial to identify traits that confer tolerance. Root mass density (RMD) is a pivotal trait for waterlogging tolerance; however, the behavior of this trait during waterlogging is not well understood. Therefore, two experimental years were conducted to study the effects of early‐ and late‐waterlogging at the canopy level on wheat (Triticum aestivum L., barley (Hordeum vulgare L.), oilseed rape (Brassica napus L.), and pea (Pisum sativum L.) crops in 1 m3 containers. The results showed that early‐waterlogging reduced RMD, green leaf, and stem dry weights (DWs) in wheat and barley. Nevertheless, they were able to recover without yield penalties. Late‐waterlogging had little impact on RMD in wheat and barley; however, it lowered the tiller number and caused accelerated leaf senescence, resulting in a 65% yield reduction in barley. Early‐waterlogged oilseed rape and pea also exhibited reduced RMD, with oilseed rape recovering with a 17% yield reduction, whereas pea was the most sensitive crop, showing no recovery and a 90% yield reduction. Overall, early‐ waterlogging generally reduces RMD, particularly in the shallow soil layer, but with recovery potential. In contrast, late‐ waterlogging affects yield by reducing tillers/branches and accelerating senescence, with little impact on RMD. Identifying these traits and their responses to waterlogging stress can aid in the development of strategies to mitigate the negative impacts of waterlogging on crops.

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Section: Introductionmentioning

confidence: 99%

Waterlogging tolerance of winter crops: Root mass density and canopy dynamics

2023

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“…Under soil water stress, there is a "threshold" response of photosynthesis of wheat leaves to soil water content [27]. When the intercellular CO 2 concentration of leaves changes from decreasing to increasing, it indicates that the main reason for the decrease of the photosynthetic rate is caused by water stress changes from stomatal limitation to nonstomatal limitation [28,29]. It is known that the moderate water deficit in a specific growth period does not reduce crop yield but increases crop productivity and WUE [30,31].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Leaf Water Use Efficiency Threshold Values for Water Stress in Winter Wheat (Triticum aestivum L.)

et al. 2020

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Drought significantly threatens crop productivity and food security worldwide. However, the severity of drought is predicted to increasingly intensify in the future. To provide an antidrought strategy for farmers and breeders, the response of stomatal behavior of crops to water stress should be well studied. In this study, a lysimeter experiment was conducted to study the relationship between gas exchange parameters and grain yields of winter wheat. Light, moderate, and severe drought levels were imposed at seedling, jointing, heading, and filling stages. The results showed that crop evapotranspiration (ETc, mm) of winter wheat during the entire growing season was limited by drought imposed at any growth stage, and ETc under severe drought treatment was always the lowest. The stomatal limitation value had a significant linear correlation with the stomatal conductance (Gs, μmol mol H2O m–2 s–1) and transpiration rate (Tr, mmol H2O m–2 s–1). Light and moderate drought levels at the seedling stage did not generate irreversible physiological stress on wheat plants, while severe drought at any growth stage caused significant reduction in gas exchange parameters and grain yields. Theoretical threshold values of leaf water use efficiency (WUEl) for light, moderate, and severe drought levels were 2.62, 3.36, and 4.11 μmol mmol–1, respectively. The threshold values are useful to provide theoretical reference for achieving smart irrigation in the North China Plain.

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Irrigation based on daily weighted evapotranspiration affects yield and quality of oriental melon

Ren

Liu

et al. 2021

Scientia Horticulturae

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Responses of photosynthesis, dry mass and carbon isotope discrimination in winter wheat to different irrigation depths

Cited by 3 publications

References 38 publications

Waterlogging tolerance of winter crops: Root mass density and canopy dynamics

Waterlogging tolerance of winter crops: Root mass density and canopy dynamics

Estimation of Leaf Water Use Efficiency Threshold Values for Water Stress in Winter Wheat (Triticum aestivum L.)

Irrigation based on daily weighted evapotranspiration affects yield and quality of oriental melon

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