Carbohydrate metabolism and transport in apple roots under nitrogen deficiency

Zhao, Hang; Sun, Simin; Zhang, Lihua; Yang, Jingjing; Wang, Zhengyang; Ma, Fengwang; Li, Mingjun

doi:10.1016/j.plaphy.2020.07.037

Cited by 39 publications

(20 citation statements)

References 26 publications

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“…The efficient use of nitrogen (N) has been a bottleneck affecting global agricultural systems. N deficiency drastically reduces the photosynthetic rate, the number of flowers, and crop yields due to the decrease in the amount of RuBisCO protein and activity [ 155 , 156 ]. Roots subjected to N deficiency accumulate more photosynthetic products such as sucrose and sorbitol.…”

Section: Influence Of Environmental Factors On Photo-assimilate Transportmentioning

confidence: 99%

“…Roots subjected to N deficiency accumulate more photosynthetic products such as sucrose and sorbitol. Thus, unloading of photosynthates to the roots primarily serves as an energy source and signal molecule involved in root growth, thereby increasing the root-to-shoot biomass ratio [ 155 ]. Increased root carbon boosts the chances of the root to forage for more N in the soil or nutrient solution, indicating the relationship between the signaling roles of sugar and nitrate (NO 3 − ) in improving shoot and root growth.…”

Section: Influence Of Environmental Factors On Photo-assimilate Transportmentioning

confidence: 99%

See 1 more Smart Citation

Sucrose Utilization for Improved Crop Yields: A Review Article

Aluko

Wang

et al. 2021

IJMS

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Photosynthetic carbon converted to sucrose is vital for plant growth. Sucrose acts as a signaling molecule and a primary energy source that coordinates the source and sink development. Alteration in source–sink balance halts the physiological and developmental processes of plants, since plant growth is mostly triggered when the primary assimilates in the source leaf balance with the metabolic needs of the heterotrophic sinks. To measure up with the sink organ’s metabolic needs, the improvement of photosynthetic carbon to synthesis sucrose, its remobilization, and utilization at the sink level becomes imperative. However, environmental cues that influence sucrose balance within these plant organs, limiting positive yield prospects, have also been a rising issue over the past few decades. Thus, this review discusses strategies to improve photosynthetic carbon assimilation, the pathways actively involved in the transport of sucrose from source to sink organs, and their utilization at the sink organ. We further emphasize the impact of various environmental cues on sucrose transport and utilization, and the strategic yield improvement approaches under such conditions.

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Section: Influence Of Environmental Factors On Photo-assimilate Transportmentioning

confidence: 99%

Section: Influence Of Environmental Factors On Photo-assimilate Transportmentioning

confidence: 99%

Sucrose Utilization for Improved Crop Yields: A Review Article

Aluko

Wang

et al. 2021

IJMS

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“…We think that on the one hand, the decreases in F6P and G6P contents can be attributed to the lower efficiency of hexose phosphorylation by hexokinase rather than the reduction in glucose supply. On the other hand, under warming conditions, A. faxoniana growing at high altitudes possibly consumes less energy than that growing at low altitude ( Zhao et al, 2020 ; Zhang et al, 2021 ). Therefore, A. faxoniana at low altitude need to obtain more energy to cope with warming, whereas it is most likely to adopt an energy conservation strategy at high altitude.…”

Section: Discussionmentioning

confidence: 99%

Low-Altitude Boundary of Abies faxoniana Is More Susceptible to Long-Term Open-Top Chamber Warming in the Eastern Tibetan Plateau

2021

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With global climate change, for evaluating warming effect on subalpine forest distribution, the substantial effects of long-term warming on tree growth and soil nutrients need to be explored. In this study, we focused on different responses in the boundaries of trees and soils to warming. Using the open-top chamber (OTC), a 10-year artificial warming experiment was conducted to evaluate the impacts of warming on Abies faxoniana at three different altitudes. We determined metabolites and nutrient concentrations in needles of A. faxoniana and characterized the soil chemistries. Many kinds of sugars, amino acids, and organic acids showed higher contents at high altitude (3,500 m) compared with low altitude (2,600 m), which could have been due to the temperature differences. Warming significantly decreased needle sugar and amino acid concentrations at high altitude but increased them at low altitude. These results indicated contrasting physiological and metabolic responses of A. faxoniana to long-term warming at different altitudes. Furthermore, we found that OTC warming significantly increased the concentrations of soil extractable sodium, aluminum (Al), and manganese (Mn), while decreased potassium (K) and phosphorus (P) concentrations and pH values at low altitude rather than at middle (3,000 m) or high altitude. The soil carbon and nitrogen contents were increased only at the middle altitude. In A. faxoniana at low altitudes, more mineral nutrients iron, K, and P were demand, and a mass of Al, Mn, and zinc was accumulated under warming. Soil P limitation and heavy metals accumulation are disadvantageous for trees at low altitudes with warming. Therefore, compared with high altitudes, A. faxoniana growing at low boundary in alpine regions is expected to be more susceptible to warming.

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“…In apple orchards, proper N fertilization is a critical component of farmers' tree management, and during the growing season, the stress responses of apple trees induced by various N fertilization can result in unbalanced growth and physiological disorders. Global transcriptome data from previous studies [20,21] and recent studies have suggested examining the different responses to N tolerance in apple tissues [22,23]. However, little is known about the underlying molecular mechanisms of responsive metabolic signals associated with various N stress conditions in apple.…”

Section: Introductionmentioning

confidence: 99%

Identification of Genes Associated with Nitrogen Stress Responses in Apple Leaves

Lee

Giap

Kim

et al. 2021

Plants

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Nitrogen (N) is an essential macronutrient that regulates diverse physiological processes for plant survival and development. In apple orchards, inappropriate N conditions can cause imbalanced growth and subsequent physiological disorders in trees. In order to investigate the molecular basis underlying the physiological signals for N stress responses, we examined the metabolic signals responsive to contrasting N stress conditions (deficient/excessive) in apple leaves using transcriptome approaches. The clustering of differentially expressed genes (DEGs) showed the expression dynamics of genes associated with each N stress group. Functional analyses of gene ontology and pathway enrichments revealed the potential candidates of metabolic signals responsible for N-deficient/excessive stress responses. The functional interactions of DEGs in each cluster were further explored by protein–protein interaction network analysis. Our results provided a comprehensive insight into molecular signals responsive to N stress conditions, and will be useful in future research to enhance the nutrition tolerance of tree crops.

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Carbohydrate metabolism and transport in apple roots under nitrogen deficiency

Cited by 39 publications

References 26 publications

Sucrose Utilization for Improved Crop Yields: A Review Article

Sucrose Utilization for Improved Crop Yields: A Review Article

Low-Altitude Boundary of Abies faxoniana Is More Susceptible to Long-Term Open-Top Chamber Warming in the Eastern Tibetan Plateau

Identification of Genes Associated with Nitrogen Stress Responses in Apple Leaves

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