Drought tolerance of the sugar cane varieties during the initial development

Silverio, Janaína de Miranda; Silva, Tonny José Araújo da; Bonfim-Silva, Edna Maria; Iaia, Antonio Marcos; Duarte, Thiago Franco; Pires, Regina Célia Matos

doi:10.21475/ajcs.17.11.06.p437

Cited by 7 publications

(3 citation statements)

References 10 publications

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“…Irrigations were done at 16, 23, and 29 days after transplantation ( Figure 1 ). According to Inman-Bamber et al (1998) and Silverio et al (2017), Ψ m between -60 and -100 kPa can be considered a condition of severe water stress for sugarcane at the initial developmental stages. Ψ m was monitored on daily basis and the study was finished 1 day after the first root has reached the bottom of the rhizotron (0.90 m depth), which happened 35 days after transplanting.…”

Section: Methodsmentioning

confidence: 99%

Physiological Plasticity Is Important for Maintaining Sugarcane Growth under Water Deficit

et al. 2017

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The water availability at early phenological stages is critical for crop establishment and sugarcane varieties show differential performance under drought. Herein, we evaluated the relative importance of morphological and physiological plasticity of young sugarcane plants grown under water deficit, testing the hypothesis that high phenotypic plasticity is associated with drought tolerance. IACSP95-5000 is a high yielding genotype and IACSP94-2094 has good performance under water limiting environments. Plants were grown in rhizotrons for 35 days under three water availabilities: high (soil water matric potential [Ψm] higher than -20 kPa); intermediate (Ψm reached -65 and -90 kPa at the end of experimental period) and low (Ψm reached values lower than -150 kPa). Our data revealed that morphological and physiological responses of sugarcane to drought are dependent on genotype and intensity of water deficit. In general, IACSP95-5000 showed higher physiological plasticity given by leaf gas exchange and photochemical traits, whereas IACSP94-2094 showed higher morphological plasticity determined by changes in leaf area (LA) and specific LA. As IACSP94-2094 accumulated less biomass than IACSP95-5000 under varying water availability, it is suggested that high morphological plasticity does not always represent an effective advantage to maintain plant growth under water deficit. In addition, our results revealed that sugarcane varieties face water deficit using distinct strategies based on physiological or morphological changes. When the effectiveness of those changes in maintaining plant growth under low water availability is taken into account, our results indicate that the physiological plasticity is more important than the morphological one in young sugarcane plants.

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Section: Methodsmentioning

confidence: 99%

Physiological Plasticity Is Important for Maintaining Sugarcane Growth under Water Deficit

et al. 2017

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“…Crop management practices have evolved to cope with the rougher weather and soils of the Cerrado, as well as with the demand-and production-scale trends. Other relevant improvements in the system are drought-resistant sugarcane varieties, the development of mechanical instead of manual planting technology, better crop nutrition, integrated pest and disease management, including the adoption of biological control, and, especially, the shift from burnt and manual to mechanical harvesting [31]. Additionally, relevant to the system is the development of new practices, such as deficit-irrigated and minimum-till production systems [32].…”

Section: Sugarcane System Descriptionmentioning

confidence: 99%

Drought Risk Assessment of Sugarcane-Based Electricity Generation in the Rio dos Patos Basin, Brazil

Zeballos

Sebesvári²,

Rhyner³

et al. 2022

Sustainability

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Brazil has a large share of hydropower in its electricity matrix. Since hydropower depends on water availability, it is particularly vulnerable to drought events, making the Brazilian electricity matrix vulnerable to climate change. Starting in 2005, Brazil opened the matrix to new renewable sources, including sugarcane-based electricity. Sugarcane is known for its resilience to short dry spells. Over the last decades, its production area moved from the coastal plains of the Atlantic Forest biome to the savannahs of the Cerrado biome, which is characterised by a five- to six month-long dry season. The sugarcane-based electricity system is highly dynamic and complex due to the interlinkages, dependencies, and cascading impacts between its agricultural and industrial subsystems. This paper applies the risk framework proposed by the IPCC to assess climate-change-driven drought risks to sugarcane electricity generation systems to identify their strengths and weaknesses, considering the system dynamics and linkages. Our methodology aims to understand and characterize drought in the agriculture as well as industrial subsystems and offers a specific understanding of the system by using indicators tailored to sugarcane-based electricity generation. Our results underline the relevance of actions at different levels of management. Initiatives, such as regional weather forecasts specifically for agriculture, and measures to increase industrial water-use efficiency were identified to be essential to reduce the drought risk. Actions from farmers and mill owners, supported and guided by the government at different levels, have the potential to increase the resilience of the system. For example, the implementation of small dams was identified by local actors as a promising intervention to adapt to the long dry seasons; however, they need to be implemented based on a proper technical assessment in order to locate these dams in suitable places. Moreover, the results show that creating and maintaining small water reservoirs to enable the adoption of deficit-controlled irrigation technology contribute to reducing the overall drought risk of the sugarcane-based electricity generation system.

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“…Apart from this, monoliths have found wide usage in various fields of science, including some aspects of soil physics (Paludo et al, 2017), biology (Peres-Oliveira et al, 2017), microbiology, engineering, agrometeorology (Silvério et al, 2017), fertility, hydrology, and plant production in natural environments or greenhouses (Allaire;Bochove, 2006). The model of the sampler and the operator may cause many errors during collection, such as changing the bulk density and soil porosity (Souza et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of Soil Monolith Collectors of Adjustable Dimensions

Venzon

Silva

Bonfim-Silva

et al. 2020

BJD

Self Cite

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Scientists across the globe face a large challenge during representative soil sample collection when having to carefully retain the physical-chemical structure of the soil. The goal was to validate the performance of a mechanical collector of soil monoliths of adjustable formats and to establish suitable mechanical indicators of the operational equipment. The collector's operating ability, efficiency, and precision were confirmed in terms of the aspects listed: definition of the optimal rotation of work; maintenance of a uniform diameter and height of the monoliths in cylindrical and conical formats; collection efficiency under unfavorable conditions (roots and gravel presence); specification of the ideal soil moisture levels for collection from the various types of soil classes; collection from terrain characterized by uneven topography and evaluation of the wearing out of cutting tool edges (drill).

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Drought tolerance of the sugar cane varieties during the initial development

Cited by 7 publications

References 10 publications

Physiological Plasticity Is Important for Maintaining Sugarcane Growth under Water Deficit

Physiological Plasticity Is Important for Maintaining Sugarcane Growth under Water Deficit

Drought Risk Assessment of Sugarcane-Based Electricity Generation in the Rio dos Patos Basin, Brazil

Mechanical Performance of Soil Monolith Collectors of Adjustable Dimensions

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