Biometrics and grain yield of sorghum varieties irrigated with salt water

Guimarães, M. J. M.; Simões, Welson Lima; Oliveira, A. R. de; Araújo, Gherman Garcia Leal de; Silva, Ênio Farias de França e; Willadino, Lília

doi:10.1590/1807-1929/agriambi.v23n4p285-290

Cited by 19 publications

(14 citation statements)

References 14 publications

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“…Guimarães et al [66] found a 50% WUE decline with an EC w of 6.9 dS m −1 in sorghum, in accordance with the sharp WUE decrease observed in our experiment (Figure 3D). Richardson and McCree [67] and Yan et al [68] argued that sorghum reduces stomatal conductance and transpiration under salinity, potentially leading to WUE increases.…”

Section: Discussionsupporting

confidence: 92%

Salt Tolerance and Na Allocation in Sorghum bicolor under Variable Soil and Water Salinity

Calone

Sanoubar

Lambertini

et al. 2020

Plants

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Salinity is a major constraint for plant growth in world areas exposed to salinization. Sorghum bicolor (L.) Moench is a species that has received attention for biomass production in saline areas thanks to drought and salinity tolerance. To improve the knowledge in the mechanisms of salt tolerance and sodium allocation to plant organs, a pot experiment was set up. The experimental design combined three levels of soil salinity (0, 3, and 6 dS m−1) with three levels of water salinity (0, 2–4, and 4–8 dS m−1) and two water regimes: no salt leaching (No SL) and salt leaching (SL). This latter regime was carried out with the same three water salinity levels and resulted in average +81% water supply. High soil salinity associated with high water salinity (HSS-HWS) affected plant growth and final dry weight (DW) to a greater extent in No SL (−87% DW) than SL (−42% DW). Additionally, HSS-HWS determined a stronger decrease in leaf water potential and relative water content under No SL than SL. HSS-HWS with No SL resulted in a higher Na bioaccumulation from soil to plant and in translocation from roots to stem and, finally, leaves, which are the most sensitive organ. Higher water availability (SL), although determining higher salt input when associated with HWS, limited Na bioaccumulation, prevented Na translocation to leaves, and enhanced selective absorption of Ca vs. Na. At plant level, higher Na accumulation was associated with lower Ca and Mg accumulation, especially in No SL. This indicates altered ion homeostasis and cation unbalance.

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Section: Discussionsupporting

confidence: 92%

Salt Tolerance and Na Allocation in Sorghum bicolor under Variable Soil and Water Salinity

Calone

Sanoubar

Lambertini

et al. 2020

Plants

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“…Poucas variáveis de crescimento e de acúmulo de matéria seca do sorgo foram afetadas pelos distintos regimes hídricos (Tabelas I e II). Este resultado pode estar associado à alta tolerância do sorgo à seca e ao excesso de água combinados ao estresse salino (Guimarães et al, 2016;Guimarães et al, 2019). Nestas condições, o sorgo limita as suas atividades metabólicas (Bell et al, 2015).…”

Section: Discussionunclassified

“…O sorgo possui características fisiológicas que permitem interromper o crescimento ou limitar as suas atividades metabólicas sob escassez hídrica (Bell et al, 2015;Guimarães et al, 2019). Por outro lado, as plantas sujeitas ao excesso hídrico possuem sua condutância estomática afetada e diminui as taxas de fotossíntese e de crescimento, ocasionando em queda da produção da parte aérea e de raízes.…”

Section: Introductionunclassified

Crescimento e eficiência do uso da água do sorgo sob distintos regimes hídricos contínuos.

et al. 2020

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A avaliação do crescimento permite melhorar a compreensão da resposta da planta as condições de estresse. Objetivou-se avaliar a resposta do crescimento, acúmulo de biomassa e da eficiência do uso da água do sorgo a diferentes regimes hídricos continuados com água salina. O experimento foi conduzido em Serra Talhada, Pernambuco, Brasil. O sorgo, cv. Sudão IPA 4202, foi semeado em vasos em um viveiro. As plantas foram dispostas em delineamento inteiramente ao acaso submetidas a quatro regimes hídricos durante todo o ciclo com base na evapotranspiração de referência (ET0) (125%, 100%, 75% e 50%.ET0), com 32 repetições. Ao longo do tempo foram coletados dados de biometria, biomassa de forragem e consumo de água da cultura. A planta foi fracionada e seus componentes foram mensurados. Os índices morfofisiológicos foram obtidos. Não houve efeito de regime hídrico na maioria das variáveis de crescimento, acúmulo e partição de matéria seca. A eficiência do uso da água foi mantida, mesmo com a redução no consumo de água pela cultura. As mudanças no aparecimento e na senescência foliar não alteraram os índices morfofisiológicos, sugerindo manutenção da taxa fotossintética da cultura nas distintas disponibilidades de água. Conclui-se que, o sorgo, cv. Sudão IPA 4202, possui alta adaptação a ambientes de cultivo com ampla variação de regime hídrico, recomendando-se lâmina de 50%.ET0.

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“…Salinity is one of the most severe environmental stresses and the responses given by plants are diverse. These are reflected in physiological variables (stomach conductance, rate of perspiration and photosynthesis) (Freire et al, 2014), biometrics (height, leaf area, biomass production) (Guimarães et al, 2019), biochemistry (antioxidant enzymes) (Barbosa et al, 2014). Sorghum bicolor (L.) Moench is a crop species that presents C4 mechanism, and is one of the most versatile and efficient species in terms of photosynthetic mechanism (Berenguer & Faci, 2001).…”

Section: Introductionmentioning

confidence: 99%

Salinity decreases transpiration of sorghum plants

Guimarães

Simões

Barros³

et al. 2020

Exp Results

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Growing in a saline environment causes changes in important physiological processes that are directly related to plant growth and development. In this study we evaluated the effect of salinity on transpiration of sorghum plants in semi-arid conditions and found that the highest rates of transpiration were observed in the hottest hours of the day, between 10 a.m. and 3 p.m., with plants subjected to the saline environment having their transpiration reduced by up to 70% when compared to the non-saline environment. This behavior can be reflected in reductions in plant growth and development due to reduced water absorption by the roots, consequently causing an imbalance of nutrients in the plant due to low absorption rate and competition between nutrients and salts in the preferred routes of absorption in the roots.

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Biometrics and grain yield of sorghum varieties irrigated with salt water

Cited by 19 publications

References 14 publications

Salt Tolerance and Na Allocation in Sorghum bicolor under Variable Soil and Water Salinity

Salt Tolerance and Na Allocation in Sorghum bicolor under Variable Soil and Water Salinity

Crescimento e eficiência do uso da água do sorgo sob distintos regimes hídricos contínuos.

Salinity decreases transpiration of sorghum plants

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