Nitrogen assimilation pathways and ionic homeostasis are crucial for photosynthetic apparatus efficiency in salt-tolerant sunflower genotypes

Araújo, Gyedre dos Santos; Miranda, Rafael de Souza; Mesquita, Rosilene Oliveira; Paula, Stelamaris de Oliveira; Prisco, José Tarquı́nio; Gomes-Filho, Enéas

doi:10.1007/s10725-018-0436-y

Cited by 8 publications

(5 citation statements)

References 67 publications

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“…8f and 9). In concordance, recent findings showed that chlorophyll and carotenoids can act as salinity markers, and plants able to maintain elevated levels of photosynthetic pigments usually display improved growth under salt stress (Mittal et al 2012;Araújo et al 2018).…”

Section: Salinity Tolerance Of the Pitiúba Genotype Is Associated With Improved Photochemical Performance And Structural Compounds Rathersupporting

confidence: 73%

“…More details same as in Fig. 1 and Table S5 The photosynthetic performance of salt-sensitive cowpea genotypes was seriously injured by salt-induced oxidative damage in structural compounds and photosystem II operation (Yan et al 2012;Zahra et al 2014;Araújo et al 2018). This argument was corroborated by the low ΦPSII and ETR values in the severe salt-stressed Epace and Juruá genotypes, indicating that a considerable amount of absorbed energy was not transferred to reaction centers.…”

Section: Salinity Tolerance Of the Pitiúba Genotype Is Associated With Improved Photochemical Performance And Structural Compounds Rathermentioning

confidence: 89%

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Salt-Acclimation Physiological Mechanisms at the Vegetative Stage of Cowpea Genotypes in Soils from a Semiarid Region

Miranda

Souza

Alves

et al. 2021

J Soil Sci Plant Nutr

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Developing salt-tolerant plants has emerged as a highly efficient approach to cope with salinity damage on crop growth and productivity. This study aimed to elucidate the mechanisms of salt acclimation in cowpea plants [Vigna unguiculata (L.) Walp] and screen salt-tolerant potential genotypes during the early vegetative stage. Seven cowpea genotypes (Epace, Juruá, Maratauã, Milagroso, Pitiúba, Sempre verde, and TVU) were irrigated for 24 days with saline solutions of electrical conductivity 0.8 (control), 4.0 (moderate stress), and 8.0 dS m −1 (severe stress). Growth, water status, membrane damage, and variables related to photosynthetic machinery efficiency were evaluated. Biomass accumulation dramatically decreased with salinity, and the reductions were intensified by increasing the salt level. Nevertheless, under moderate salinity, Pitiúba plants showed less reductions in growth than other genotypes. Under moderate stress, Pitiúba plants exhibited maintenance of osmotic potential and photosynthetic pigments, which was consistent with unaltered membrane and elevated leaf succulence, resulting in improved photochemical performance. Conversely, although TVU, Juruá, and Milagroso plants had activated responses against moderate salinity, including reduced leaf osmotic potential and improved stomatal conductance, these responses were not sufficient to mitigate salt injury. The findings clearly show that the Pitiúba genotype activates coordinated responses to mitigate moderate salt damage, constituting an alternative for cultivating cowpea plants in saline environments.

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Section: Salinity Tolerance Of the Pitiúba Genotype Is Associated With Improved Photochemical Performance And Structural Compounds Rathersupporting

confidence: 73%

Section: Salinity Tolerance Of the Pitiúba Genotype Is Associated With Improved Photochemical Performance And Structural Compounds Rathermentioning

confidence: 89%

Salt-Acclimation Physiological Mechanisms at the Vegetative Stage of Cowpea Genotypes in Soils from a Semiarid Region

Miranda

Souza

Alves

et al. 2021

J Soil Sci Plant Nutr

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“…The lower reduction of Gs in mycorrhizal seedlings than nonmycorrhizal seedlings under moderate salt stress suggested that the growth status may be better in mycorrhizal seedlings, resulting from less of a decrease in CO 2 diffusion through the stomata [34]. The Ci values were higher than those under unstressed conditions, which may indicate that enzymes in the photosynthesis apparatus were destroyed, resulting in a decrease in CO 2 assimilation and the accumulation of CO 2 in intercellular areas [35]. In our research, mycorrhizal seedlings had a significant higher Ci than nonmycorrhizal seedlings at 100 and 150 mM NaCl.…”

Section: Plos Onementioning

confidence: 95%

Arbuscular mycorrhizal fungi (AMF) enhance the tolerance of Euonymus maackii Rupr. at a moderate level of salinity

Meng

et al. 2020

PLoS ONE

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Salt stress is one of the major environmental constraints for plant growth. Although the ways in which mycorrhizal plants deal with salt stress have been well documented, it still is blank for Euonymus maackii, an important local ecological restoration tree, to arbuscular mycorrhizal fungi (AMF) inoculation and salt stress. In this study, we tested the effect of different salt levels (0, 50, 100,150 and 200 mM) and AMF inoculation on E. maackii growth rate, photosynthesis, antioxidant enzymes, nutrient absorption and salt ion distribution. The results indicated negative effect of salt on height, photosynthesis capacity, nutrition accumulation, while salt stimulated the antioxidant defense system and salt ions accumulation. The toxic symptom by excessive accumulation of salt ions worsen with salt level increased gradually (except for the 50 mM NaCl treatment). AMF inoculation alleviated the toxic symptom under moderate salt levels (100 and 150 mM) by increasing photosynthesis capacity, accelerating nutrient absorption and activating antioxidant enzyme activities under salt stress. Meanwhile, effect of AMF was not detected on seedlings under slight (0 and 50 mM) and high (200 mM) NaCl concentration. Our study indicated AMF had positive impact on E. maackii subjected to salt, which suggested potential application of AMF-E. maackii on restoration of salt ecosystems.

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“…The elevated sensitivity to drought observed in the M8808 soybean cultivar was associated with reduced accumulation of soluble carbohydrate, likely due to impaired CO 2 assimilation under water limitation (Figure 1F) [33,34]. These implications suggest an energy excess at the PSII level and increased oxidative damage, as supported by the recorded membrane damage in leaves and roots (Figure 1F) [35][36][37]. In contrast, the TMG1180 RR cultivar, which exhibited greater tolerance to drought, showed a smaller decrease in biomass accumulation under drought stress, a response associated with the accumulation of free amino acids.…”

Section: Leguminous Crops Activate Specific Biochemical Mechanisms Fo...mentioning

confidence: 87%

Selection of Soybean and Cowpea Cultivars with Superior Performance under Drought Using Growth and Biochemical Aspects

Miranda,

Fonseca,

Pinho

et al. 2023

Plants

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Identifying cultivars of leguminous crops exhibiting drought resistance has become crucial in addressing water scarcity issues. This investigative study aimed to select soybean and cowpea cultivars with enhanced potential to grow under water restriction during the vegetative stage. Two parallel trials were conducted using seven soybean (AS3810IPRO, M8644IPRO, TMG1180RR, NS 8338IPRO, BMX81I81IPRO, M8808IPRO, and BÔNUS8579IPRO) and cowpea cultivars (Aracê, Novaera, Pajeú, Pitiúba, Tumucumaque, TVU, and Xique-xique) under four water levels (75, 60, 45, and 30% field capacity—FC) over 21 days. Growth, water content, membrane damage, photosynthetic pigments, organic compounds, and proline levels were analyzed. Drought stress significantly impacted the growth of both crops, particularly at 45 and 30% FC for soybean and 60 and 45% FC for cowpea plants. The BÔNUS8579IPRO and TMG1180RR soybean cultivars demonstrated the highest performance under drought, a response attributed to increased amino acids and proline contents, which likely help to mitigate membrane damage. For cowpea, the superior performance of the drought-stressed Xique-xique cultivar was associated with the maintenance of water content and elevated photosynthetic pigments, which contributed to the preservation of the photosynthetic efficiency and carbohydrate levels. Our findings clearly indicate promising leguminous cultivars that grow under water restriction, serving as viable alternatives for cultivating in water-limited environments.

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Nitrogen assimilation pathways and ionic homeostasis are crucial for photosynthetic apparatus efficiency in salt-tolerant sunflower genotypes

Cited by 8 publications

References 67 publications

Salt-Acclimation Physiological Mechanisms at the Vegetative Stage of Cowpea Genotypes in Soils from a Semiarid Region

Salt-Acclimation Physiological Mechanisms at the Vegetative Stage of Cowpea Genotypes in Soils from a Semiarid Region

Arbuscular mycorrhizal fungi (AMF) enhance the tolerance of Euonymus maackii Rupr. at a moderate level of salinity

Selection of Soybean and Cowpea Cultivars with Superior Performance under Drought Using Growth and Biochemical Aspects

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