Alternate partial root-zone drip irrigation improves water– and nitrogen– use efficiencies of sweet-waxy maize with nitrogen fertigation

Fu, Fengbei; Li, Fusheng; Kang, Shaozhong

doi:10.1038/s41598-017-17560-2

Cited by 26 publications

(7 citation statements)

References 30 publications

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“…Shoot glutamine synthetase activity and NUtE shared most of the genotypic variation and contributed to PC2, which was mainly associated with cotton genotypes (Figures 5 and 6). Moreover, NUtE was negatively correlated with increasing nitrogen supply, which is in line with the previous results [70][71][72]. The reduction in NUtE with increasing nitrogen supply might be due to excessive storage of external N beyond plant requirements, and thus the external N cannot stimulate further growth [73].…”

Section: Variations In Morphophysiological and Biochemical Traits Aresupporting

confidence: 90%

Variations in Nitrogen Metabolism are Closely Linked with Nitrogen Uptake and Utilization Efficiency in Cotton Genotypes under Various Nitrogen Supplies

Iqbal

Dong

Wang

et al. 2020

Plants

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Cotton production is highly sensitive to nitrogen (N) fertilization, whose excessive use is responsible for human and environmental problems. Lowering N supply together with the selection of N-efficient genotypes, more able to uptake, utilize, and remobilize the available N, could be a challenge to maintain high cotton production sustainably. The current study aimed to explore the intraspecific variation among four cotton genotypes in response to various N supplies, in order to identify the most distinct N-efficient genotypes and their nitrogen use efficiency (NUE)-related traits in hydroponic culture. On the basis of shoot dry matter, CCRI-69 and XLZ-30 were identified as N-efficient and N-inefficient genotypes, respectively, and these results were confirmed by their contrasting N metabolism, uptake (NUpE), and utilization efficiency (NUtE). Overall, our results indicated the key role of shoot glutamine synthetase (GS) and root total soluble protein in NUtE. Conversely, tissue N concentration and N-metabolizing enzymes were considered as the key traits in conferring high NUpE. The remobilization of N from the shoot to roots by high shoot GS activity may be a strategy to enhance root total soluble protein, which improves root growth for N uptake and NUE. In future, multi-omics studies will be employed to focus on the key genes and pathways involved in N metabolism and their role in improving NUE.

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Section: Variations In Morphophysiological and Biochemical Traits Aresupporting

confidence: 90%

Variations in Nitrogen Metabolism are Closely Linked with Nitrogen Uptake and Utilization Efficiency in Cotton Genotypes under Various Nitrogen Supplies

Iqbal

Dong

Wang

et al. 2020

Plants

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“…need to improve irrigation management in order to increase water use efficiency. Partial root-zone irrigation (PRI) is a water-saving irrigation technique that improves water use efficiency without reducing yield (Kang et al, 1997;Kang and Zhang, 2004;Fu et al, 2017). Previous reports showed that PRI is associated with a relatively high level of photosynthetic activity despite the reduced irrigation and decreased transpiration compared with conventional irrigation (Kirda et al, 2004;Zegbe et al, 2004;Tang et al, 2005).…”

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confidence: 99%

Leaf-Derived Jasmonate Mediates Water Uptake from Hydrated Cotton Roots under Partial Root-Zone Irrigation

Luo

Zhang

et al. 2019

Plant Physiol.

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Partial root-zone irrigation (PRI), a water-saving technique, improves water uptake in hydrated roots by inducing specific responses that are thought to be regulated by signals originating from leaves; however, this signaling is poorly understood. Using a split-root system and polyethylene glycol 6000 to simulate PRI in cotton (Gossypium hirsutum), we showed that increased root hydraulic conductance (L) and water uptake in the hydrated roots may be due to the elevated expression of cotton plasma membrane intrinsic protein (PIP) genes. Jasmonate (jasmonic acid [JA] and jasmonic acid-isoleucine conjugate [JA-Ile]) content and the expression of three JA biosynthesis genes increased in the leaves of the PRI plants compared with those of the polyethylene glycol-free control. JA/JA-Ile content also increased in the hydrated roots, although the expression of the three JA genes was unaltered, compared with the control. The JA/JA-Ile contents in leaves increased after the foliar application of exogenous JA and was followed by an increase in both JA/JA-Ile content and L in the hydrated roots, whereas the silencing of the three JA genes had the opposite effect in the leaves. Ring-barking the hydrated hypocotyls increased the JA/JA-Ile content in the leaves but decreased the JA/JA-Ile content and L in the hydrated roots. These results suggested that the increased JA/JA-Ile in the hydrated roots was mostly transported from the leaves through the phloem, thus increasing L by increasing the expression of GhPIP in the hydrated roots under PRI. We believe that leaf-derived JA/JA-Ile, as a long-distance signal, positively mediates water uptake from the hydrated roots of cotton under PRI. Water resources are becoming increasingly scarce in many regions due to global climate change and increasing population growth. There is thus an urgent

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“…In addition, N translocation efficiency was defined as the N translocation amount divided by N uptake at silking. The NUE was calculated as the ratio of yield relative to N uptake amount of the whole plant at maturity (Fu et al, 2017).…”

Section: Grain Weight Yield and Nuementioning

confidence: 99%

Association of maize (Zea mays L.) senescence with water and nitrogen utilization under different drip irrigation systems

Yao

Wang

et al. 2023

Front. Plant Sci.

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IntroductionDrip irrigation is an efficient water-saving system used to improve crop production worldwide. However, we still lack a comprehensive understanding of maize plant senescence and its association with yield, soil water, and nitrogen (N) utilization under this system.MethodsA 3-year field experiment in the northeast plains of China was used to assess four drip irrigation systems: (1) drip irrigation under plastic film mulch (PI); (2) drip irrigation under biodegradable film mulch (BI); (3) drip irrigation incorporating straw returning (SI); and (4) drip irrigation with the tape buried at a shallow soil depth (OI), and furrow irrigation (FI) was used as the control. The plant senescence characteristic based on the dynamic process of green leaf area (GLA) and live root length density (LRLD) during the reproductive stage, and its correlation with leaf N components, water use efficiency (WUE), and N use efficiency (NUE) was investigated.ResultsPI followed by BI achieved the highest integral GLA and LRLD, grain filling rate, and leaf and root senescence rate after silking. Greater yield, WUE, and NUE were positively associated with higher N translocation efficiency of leaf protein responding for photosynthesis, respiration, and structure under PI and BI; whereas, no significant differences were found in yield, WUE, and NUE between PI and BI. SI effectively promoted LRLD in the deeper 20- to 100-cm soil layers, prolonged the GLA and LRLD persistent durations, and reduced the leaf and root senescence rates. The remobilization of non-protein storage N was stimulated by SI, FI, and OI, which made up for the relative inadequacy of leaf N.DiscussionInstead of persistent GLA and LRLD durations and high translocation efficiency of non-protein storage N, fast and large protein N translocation from leaves to grains under PI and BI was found to facilitate maize yield, WUE, and NUE in the sole cropping semi-arid region, and BI was recommend considering that it can reduce plastic pollution.

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Alternate partial root-zone drip irrigation improves water– and nitrogen– use efficiencies of sweet-waxy maize with nitrogen fertigation

Cited by 26 publications

References 30 publications

Variations in Nitrogen Metabolism are Closely Linked with Nitrogen Uptake and Utilization Efficiency in Cotton Genotypes under Various Nitrogen Supplies

Variations in Nitrogen Metabolism are Closely Linked with Nitrogen Uptake and Utilization Efficiency in Cotton Genotypes under Various Nitrogen Supplies

Leaf-Derived Jasmonate Mediates Water Uptake from Hydrated Cotton Roots under Partial Root-Zone Irrigation

Association of maize (Zea mays L.) senescence with water and nitrogen utilization under different drip irrigation systems

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