Exogenous boron alleviates growth inhibition by NaCl stress by reducing Cl− uptake in sugar beet (Beta vulgaris)

Dong, Xiao-Qiao; Sun, Lianfeng; Guo, Jianrong; Liu, Lili; Han, Guoliang; Wang, Baoshan

doi:10.1007/s11104-021-04946-5

Cited by 15 publications

(5 citation statements)

References 78 publications

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“…Besides Na + , Cl − efflux and compartmentalization are also important salt tolerance mechanisms. Studies have shown that exogenous silicon can reduce Na + content in tomato seedling leaves, promote the uptake of K + , Ca 2+ , and Mg 2+ , and increase the K + /Na + and Ca 2+ /Na + ratios in leaves by at least 2-fold [ 52 ]; exogenous melatonin significantly increases the expression of SOS genes ( SOS1 , SOS2 , and SOS3 ) in plants under salt stress, reducing Na + content in the aboveground parts and increasing the K + /Na + ratio [ 53 , 54 ]; exogenous boron, by upregulating the expression of CLC genes, reduces Cl − uptake, alleviating the impact of NaCl stress on beet growth [ 55 ]. This study found that salt stress disrupted ion homeostasis in tomato seedling roots and leaves, resulting in the accumulation of Na + and Cl − , while reducing the uptake of K + , Ca 2+ , and Mg 2+ , affecting the absorption and transport ratios of ions in roots and leaves ( Figure 4 and Figure 5 ), and decreasing the expression of the SOS ( SOS1 , SOS2 , and SOS3 ), HKT1;2 , NHX ( NHX1 , NHX2 , and NHX3 ), CLC , and VP1 genes in seedling leaves ( Figure 6 ).…”

Section: Discussionmentioning

confidence: 99%

Ascorbic Acid Improves Tomato Salt Tolerance by Regulating Ion Homeostasis and Proline Synthesis

Chen,

Han,

Cong

et al. 2024

Plants

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In this study, processing tomato (Solanum lycopersicum L.) ‘Ligeer 87-5’ was hydroponically cultivated under 100 mM NaCl to simulate salt stress. To investigate the impacts on ion homeostasis, osmotic regulation, and redox status in tomato seedlings, different endogenous levels of ascorbic acid (AsA) were established through the foliar application of 0.5 mM AsA (NA treatment), 0.25 mM lycorine (LYC, an inhibitor of AsA synthesis; NL treatment), and a combination of LYC and AsA (NLA treatment). The results demonstrated that exogenous AsA significantly increased the activities and gene expressions of key enzymes (L-galactono-1,4-lactone dehydrogenase (GalLDH) and L-galactose dehydrogenase (GalDH)) involved in AsA synthesis in tomato seedling leaves under NaCl stress and NL treatment, thereby increasing cellular AsA content to maintain its redox status in a reduced state. Additionally, exogenous AsA regulated multiple ion transporters via the SOS pathway and increased the selective absorption of K+, Ca2+, and Mg2+ in the aerial parts, reconstructing ion homeostasis in cells, thereby alleviating ion imbalance caused by salt stress. Exogenous AsA also increased proline dehydrogenase (ProDH) activity and gene expression, while inhibiting the activity and transcription levels of Δ1-pyrroline-5-carboxylate synthetase (P5CS) and ornithine-δ-aminotransferase (OAT), thereby reducing excessive proline content in the leaves and alleviating osmotic stress. LYC exacerbated ion imbalance and osmotic stress caused by salt stress, which could be significantly reversed by AsA application. Therefore, exogenous AsA application increased endogenous AsA levels, reestablished ion homeostasis, maintained osmotic balance, effectively alleviated the inhibitory effect of salt stress on tomato seedling growth, and enhanced their salt tolerance.

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Section: Discussionmentioning

confidence: 99%

Ascorbic Acid Improves Tomato Salt Tolerance by Regulating Ion Homeostasis and Proline Synthesis

Chen,

Han,

Cong

et al. 2024

Plants

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“…The exogenous supply of B improved the performance of salt-grown sugar beet seedlings by reducing shoot Cl À content caused by upregulation of BvCLC-b, BvCLC-c, and BvCLC-f genes that encode Cl À transporters (Dong et al, 2021). This beneficial effect was unlikely related to merely the role of B as an essential nutrient, as B-deficient plants grown in the absence of salt show no symptoms of B deficiency.…”

Section: Plasma Membrane Integrity and Transporters Activitymentioning

confidence: 97%

“…Salt stress also results in exposure to high Cl − , and plant growth was negatively affected by elevated levels of Cl − due to the detrimental impact on the structure of cellular membranes and the function of crucial enzymes involved in photosynthesis (Seemann & Critchley, 1985). The exogenous supply of B improved the performance of salt‐grown sugar beet seedlings by reducing shoot Cl − content caused by upregulation of BvCLC‐b, BvCLC‐c, and BvCLC‐f genes that encode Cl − transporters (Dong et al, 2021). This beneficial effect was unlikely related to merely the role of B as an essential nutrient, as B‐deficient plants grown in the absence of salt show no symptoms of B deficiency.…”

Section: The Role Of Boron In Plant Adaption To Salinitymentioning

confidence: 99%

Understanding the role of boron in plant adaptation to soil salinity

Qu,

Huang,

García‐Caparrós

et al. 2024

Physiologia Plantarum

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Soil salinity is a major environmental constraint affecting the sustainability and profitability of agricultural production systems. Salinity stress tolerance has been present in wild crop relatives but then lost, or significantly weakened, during their domestication. Given the genetic and physiological complexity of salinity tolerance traits, agronomical solutions may be a suitable alternative to crop breeding for improved salinity stress tolerance. One of them is optimizing fertilization practices to assist plants in dealing with elevated salt levels in the soil. In this review, we analyse the causal relationship between the availability of boron (an essential metalloid micronutrient) and plant's adaptive responses to salinity stress at the whole‐plant, cellular, and molecular levels, and a possibility of using boron for salt stress mitigation. The topics covered include the impact of salinity and the role of boron in cell wall remodelling, plasma membrane integrity, hormonal signalling, and operation of various membrane transporters mediating plant ionic and water homeostasis. Of specific interest is the role of boron in the regulation of H+‐ATPase activity whose operation is essential for the control of a broad range of voltage‐gated ion channels. The complex relationship between boron availability and expression patterns and the operation of aquaporins is also discussed.

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“…It mitigates the toxic effects of salts on plant growth by reducing the Cluptake under saline conditions. Sugar beet growth traits such as plant height, biomass, leaf area, and photosynthetic activity were reduced under a 300 mM NaCl condition, but a foliage B (750 µM) application under these conditions reduces the chances of plant-growth inhibition [84]. CARBONBOR fertilizer as a source of B improves sugar beet's agronomic performance as well as yield parameters [85].…”

Section: Salt-affected Soilsmentioning

confidence: 99%

Sugar Beet Cultivation in the Tropics and Subtropics: Challenges and Opportunities

et al. 2023

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Sugar beet, an important sugar crop, is particularly cultivated in humid regions to produce beet sugar, fulfilling about 25% of the world’s sugar requirement, supplementing cane sugar. However, sugar beet is not well adopted in the farming system of the tropics and subtropics, which is largely due to the historically well-established production technology of sugarcane and the lower awareness among local growers of sugar beet cultivation. Thus, the poor understanding of pest and disease management and the lack of processing units for sugar beet partially hinder farmers in the large-scale adaptation of sugar beet in the tropics and subtropics. Recent climatic developments have drawn attention to sugar beet cultivation in those regions, considering the low water demand and about half the growing duration (5–6 months) in contrast to sugarcane, sparing agricultural land for an extra crop. Nevertheless, a considerable knowledge gap exists for sugar beet when closely compared to sugarcane in tropical and subtropical growth conditions. Here, we examined the leverage of existing published articles regarding the significance and potential of sugar beet production in the tropics and subtropics, covering its pros and cons in comparison to sugarcane. The challenges for sugar beet production have also been identified, and possible mitigation strategies are suggested. Our assessment reveals that sugar beet can be a promising sugar crop in tropical and subtropical regions, considering the lower water requirements and higher salt resistance.

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Exogenous boron alleviates growth inhibition by NaCl stress by reducing Cl− uptake in sugar beet (Beta vulgaris)

Cited by 15 publications

References 78 publications

Ascorbic Acid Improves Tomato Salt Tolerance by Regulating Ion Homeostasis and Proline Synthesis

Ascorbic Acid Improves Tomato Salt Tolerance by Regulating Ion Homeostasis and Proline Synthesis

Understanding the role of boron in plant adaptation to soil salinity

Sugar Beet Cultivation in the Tropics and Subtropics: Challenges and Opportunities

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