Leaf nitrogen supply improves sugarcane photosynthesis  under low temperature

Cerqueira, Gilberto Santos; Santos, Milena Christy; Marchiori, Paulo Eduardo Ribeiro; Silveira, Neidiquele M.; Machado, Eduardo Caruso; Ribeiro, Rafael V.

doi:10.32615/ps.2019.033

Cited by 15 publications

(13 citation statements)

References 66 publications

(35 reference statements)

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“…Then, low temperature seems to have an important role during the maturation period (Figure 1a), limiting photosynthesis in field-grown plants under subtropical conditions. Previously, we found sugarcane plants are sensitive to low temperature, with reduced photosynthetic rates due to stomatal, photochemical, and biochemical (low Rubisco activity) limitations (Cerqueira et al, 2019).…”

Section: Discussionmentioning

confidence: 94%

Physiological and biochemical processes underlying the differential sucrose yield and biomass production in sugarcane varieties

Martins,

Magalhães Filho,

Cruz

et al. 2024

Ex. Agric.

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Summary Sucrose yield in sugarcane is a complex process regulated by both environmental and endogenous factors. However, the metabolic balance driving vegetative growth and sucrose accumulation remains poorly understood. Herein, we carried out a comprehensive assessment of carbohydrate dynamics throughout the crop cycle in two sugarcane varieties varying in biomass production, evaluating the carbon metabolism in both leaves and stalks. Our data revealed that the decline in photosynthetic rates during sugarcane maturation is associated not only to accumulation of sugars in leaves but also due to stomatal and non-stomatal limitations. We found that metabolic processes in leaves and stalks were intrinsically linked. While IACSP94-2094 had higher stalk sucrose concentration than IACSP95-5000, this latter produced more biomass. Compared to IACSP95-5000, IACSP94-2094 showed higher sucrose phosphate synthase (SPS) activity in leaves and stalks, along with lower soluble acid invertase (SAI) activity in leaves during the maximum growth stage. Interestingly, IACSP94-2094 also exhibited higher stalk SPS activity and lower stalk SAI activity than IACSP95-5000 during maturation. High biomass production by IACSP95-5000 was associated with higher sucrose synthase (SuSy) and SAI activity in leaves and higher SuSy and soluble neutral invertase (SNI) activity in stalks when compared to IACSP94-2094 during the maximum growth. Despite the contrasting strategies, both varieties displayed similar total sucrose yield, a balance between sucrose concentration and biomass production. This phenomenon implies the presence of a compensatory mechanism in sugarcane, with high biomass production compensating low sucrose accumulation and vice versa.

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Section: Discussionmentioning

confidence: 94%

Physiological and biochemical processes underlying the differential sucrose yield and biomass production in sugarcane varieties

Martins,

Magalhães Filho,

Cruz

et al. 2024

Ex. Agric.

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“…Leaf nitrogen concentration is correlated with the concentrations of chlorophyll and RuBisCO (Ellis, 1979; Evans, 1989; Luo et al., 2021). High RuBisCO concentrations help to maintain photosynthetic efficiency in cooler temperatures where biochemical reaction rates are slower (Cerqueira et al., 2019; Holaday et al., 1992).…”

Section: Discussionmentioning

confidence: 99%

Drivers of plant diversity, community composition, functional traits, and soil processes along an alpine gradient in the central Chilean Andes

Schroeder,

Robles,

Jara‐Arancio

et al. 2024

Ecology and Evolution

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High alpine regions are threatened but understudied ecosystems that harbor diverse endemic species, making them an important biome for testing the role of environmental factors in driving functional trait‐mediated community assembly processes. We tested the hypothesis that plant community assembly along a climatic and elevation gradient is influenced by shifts in habitat suitability, which drive plant functional, phylogenetic, and spectral diversity. In a high mountain system (2400–3500 m) Región Metropolitana in the central Chilean Andes (33°S, 70°W). We surveyed vegetation and spectroscopic reflectance (400–2400 nm) to quantify taxonomic, phylogenetic, functional, and spectral diversity at five sites from 2400 to 3500 m elevation. We characterized soil attributes and processes by measuring water content, carbon and nitrogen, and net nitrogen mineralization rates. At high elevation, colder temperatures reduced available soil nitrogen, while at warmer, lower elevations, soil moisture was lower. Metrics of taxonomic, functional, and spectral alpha diversity peaked at mid‐elevations, while phylogenetic species richness was highest at low elevation. Leaf nitrogen increased with elevation at the community level and within individual species, consistent with global patterns of increasing leaf nitrogen with colder temperatures. The increase in leaf nitrogen, coupled with shifts in taxonomic and functional diversity associated with turnover in lineages, indicate that the ability to acquire and retain nitrogen in colder temperatures may be important in plant community assembly in this range. Such environmental filters have important implications for forecasting shifts in alpine plant communities under a warming climate.

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“…However, the higher photosynthetic chlorophyll a pigment concentrations at higher elevations suggests that the leaf nitrogen accumulation at these elevations may play a role in the maintenance of photosynthetic activity Leaf nitrogen concentration is correlated with the concentrations of chlorophyll, which, and RuBisCO (Ellis, 1979; Evans, 1989; Luo et al, 2021). High RuBisCO concentrations help to maintain photosynthetic efficiency in cooler temperatures where biochemical reaction rates are slower (Cerqueira et al, 2019; Holaday et al, 1992).…”

Section: Discussionmentioning

confidence: 99%

Drivers of plant diversity, community composition, functional traits and soil processes along an alpine gradient in the central Chilean Andes

Schroeder

Robles

Jara‐Arancio

et al. 2023

Preprint

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High alpine regions are threatened but understudied ecosystems that harbor diverse endemic species, making them an important biome in which to test the role of environmental factors in driving functional trait-mediated community assembly processes. In a high mountain system in the central Chilean Andes, we tested hypotheses about the drivers of plant community diversity, functional composition and soil processes along an elevation gradient. We surveyed vegetation and spectroscopic reflectance (400-2400 nm) to quantify taxonomic, phylogenetic, functional, and spectral diversity at five sites from 2400 m to 3500 m elevation. We characterized soil attributes and processes by measuring water content, carbon and nitrogen, and net nitrogen mineralization rates. At high elevation, colder temperatures led to a reduction in available soil nitrogen, while at warmer, lower elevations, soil moisture was lower. Metrics of taxonomic, functional, and spectral alpha diversity peaked at mid-elevations, while phylogenetic species richness was highest at low elevation. Leaf nitrogen followed global patterns of increasing leaf nitrogen with colder temperatures, a pattern consistent at the community level as well as within individual species. The increase in leaf nitrogen, coupled with shifts in taxonomic and functional diversity associated with turnover in lineages, indicate that the ability to acquire and retain nitrogen in colder temperatures may be important in plant community assembly in this range. Such environmental filters have important implications for forecasting shifts in alpine plant communities under a warming climate.

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Leaf nitrogen supply improves sugarcane photosynthesis under low temperature

Cited by 15 publications

References 66 publications

Physiological and biochemical processes underlying the differential sucrose yield and biomass production in sugarcane varieties

Physiological and biochemical processes underlying the differential sucrose yield and biomass production in sugarcane varieties

Drivers of plant diversity, community composition, functional traits, and soil processes along an alpine gradient in the central Chilean Andes

Drivers of plant diversity, community composition, functional traits and soil processes along an alpine gradient in the central Chilean Andes

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