Mepiquat chloride-priming induced salt tolerance during seed germination of cotton (Gossypium hirsutum L.) through regulating water transport and K+/Na+ homeostasis

Wang, Ning; Wang, Xiangru; Shi, Jianbin; Liu, Xiao-Hong; Xu, Qinghua; Zhou, Hong; Song, Meizhen; Yan, Gentu

doi:10.1016/j.envexpbot.2018.12.024

Cited by 29 publications

(21 citation statements)

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“…Considerable research indicates that salt-tolerant genotypes or species have higher capability for survival or are less affected by salinity. This has partly been attributed to higher activities of their antioxidant enzyme system and/or a higher content of non-enzymatic antioxidants [8,54,55]. Since nitrogen can improve the antioxidant capacity and salt tolerance [21], this study examined the contents of H 2 O 2 , SOD, CAT, POD, and free amino acids.…”

Section: Discussionmentioning

confidence: 99%

“…Cotton (Gossypium hirsutum L.) is considered a moderately salt-tolerant and non-halophytic plant that may also be used as a pioneer crop for soil reclamation of saline-alkaline land. However, the growth and productivity of cotton are adversely affected by high salinity levels and their tolerance level depends on the genetic background of plants and their developmental stage [8]. Usually, cotton plants exhibited…”

Section: Introductionmentioning

confidence: 99%

“…However, these measures require a very long time to implement. Previous studies indicated that proper mineral nutrition or supplementation with plant-growth regulators may be one of the best-suited strategies to improve the tolerance potential of a plant [8,19,27]. Nitrogen is not only a vital macronutrient for cotton production [14,28,29], but also the next crucial input factor for better crop production after water [30].…”

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confidence: 99%

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Nitrogen Enhances Salt Tolerance by Modulating the Antioxidant Defense System and Osmoregulation Substance Content in Gossypium hirsutum

Sikder

Wang

Zhang

et al. 2020

Plants

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Increasing soil salinity suppresses both productivity and fiber quality of cotton, thus, an appropriate management approach needs to be developed to lessen the detrimental effect of salinity stress. This study assessed two cotton genotypes with different salt sensitivities to investigate the possible role of nitrogen supplementation at the seedling stage. Salt stress induced by sodium chloride (NaCl, 200 mmol·L −1 ) decreased the growth traits and dry mass production of both genotypes. Nitrogen supplementation increased the plant water status, photosynthetic pigment synthesis, and gas exchange attributes. Addition of nitrogen to the saline media significantly decreased the generation of lethal oxidative stress biomarkers such as hydrogen peroxide, lipid peroxidation, and electrolyte leakage ratio. The activity of the antioxidant defense system was upregulated in both saline and non-saline growth media as a result of nitrogen application. Furthermore, nitrogen supplementation enhanced the accumulation of osmolytes, such as soluble sugars, soluble proteins, and free amino acids. This established the beneficial role of nitrogen by retaining additional osmolality to uphold the relative water content and protect the photosynthetic apparatus, particularly in the salt-sensitive genotype. In summary, nitrogen application may represent a potential strategy to overcome the salinity-mediated impairment of cotton to some extent.Plants 2020, 9, 450 2 of 20 most sensitivity to salinity during the seedling growth stage, and remained sensitive at the reproductive stage [9]. Excess salinity inhibits plant growth and development by inducing osmotic stress, particular ion toxicity (Na + and Cl − ), oxidative damage, and/or nutritional disorders in plant tissues, which subsequently lead to weakened plant growth and endurance [10][11][12]. Salt stress has been shown to significantly decrease the uptake and metabolism of numerous mineral nutrients (such as nitrogen, potassium, phosphorus, and calcium), and accelerate the damage of the photosynthetic machinery as well as the whole salt tolerance mechanisms of plants. Salt stress-induced plant metabolism alterations are the secondary consequence of carbon and nitrogen metabolism [13]. Moreover, a high salt concentration perturbs electron transport systems in both chloroplasts and mitochondria [14,15]. This accelerates electron leakage from electron transportation chains and induces the generation of reactive oxygen species (ROS), such as superoxide radicals, hydroxyl radicals, and hydrogen peroxide [16,17]. The over-accumulation of ROS not only damages cellular and biological activities [18][19][20], but also degrades chlorophyll pigments and obstructs the synthesis of proteins, amino acids, lipids, deoxyribonucleic acid, as well as enzymatic and non-enzymatic activities of plants [17]. To avoid ROS-induced oxidative damage, plant-assured endogenous tolerance approaches, such as the antioxidant defense system as well as the accumulation of organic solutes and secondary metabolites [21]....

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Nitrogen Enhances Salt Tolerance by Modulating the Antioxidant Defense System and Osmoregulation Substance Content in Gossypium hirsutum

Sikder

Wang

Zhang

et al. 2020

Plants

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“…Na + is often considered as the most toxic ion in a saline environment because of its excessive cytosolic concentration; moreover, frequent Na + accumulation is also deleterious for plants (Munns and Tester 2008;Munns et al 2016). To avoid excessive Na + , salt exclusion and/or ion sequestration into vacuoles represent prominent mechanisms of salt-stress adaptation (Liu et al 2018;Wang et al 2019). In the present study, all cotton genotypes accumulated inorganic Na + at different extents.…”

Section: Discussionmentioning

confidence: 60%

Screening and evaluation of reliable traits of upland cotton (Gossypium hirsutum L.) genotypes for salt tolerance at the seedling growth stage

et al. 2020

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Background: Salt stress significantly inhibits the growth, development, and productivity of cotton because of osmotic, ionic, and oxidative stresses. Therefore, the screening and development of salt tolerant cotton cultivars is a key issue towards sustainable agriculture. This study subjected 11 upland cotton genotypes at the seedling growth stage to five different salt concentrations and evaluated their salt tolerance and reliable traits. Results: Several morpho-physiological traits were measured after 10 days of salinity treatment and the salt tolerance performance varied significantly among the tested cotton genotypes. The optimal NaCl concentration for the evaluation of salt tolerance was 200 mmol•L − 1. Membership function value and salt tolerance index were used to identify the most consistent salt tolerance traits. Leaf relative water content and photosynthesis were identified as reliable indicators for salt tolerance at the seedling stage. All considered traits related to salt tolerance indices were significantly and positively correlated with each other except for malondialdehyde. Cluster heat map analysis based on the morpho-physiological salt tolerance-indices clearly discriminated the 11 cotton genotypes into three different salt tolerance clusters. Cluster I represented the salt-tolerant genotypes (Z9807, Z0228, and Z7526) whereas clusters II (Z0710, Z7514, Z1910, and Z7516) and III (Z0102, Z7780, Z9648, and Z9612) represented moderately salttolerant and salt-sensitive genotypes, respectively. Conclusions: A hydroponic screening system was established. Leaf relative water content and photosynthesis were identified as two reliable traits that adequately represented the salt tolerance of cotton genotypes at the seedling growth stage. Furthermore, three salt-tolerant genotypes were identified, which might be used as genetic resources for the salt-tolerance breeding of cotton.

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“…Mepiquat chloride (DPC) is one famous chemical that control organism growth via suppressing the GA pathways [11,12]. As an exogenous plant growth regulator, DPC is a water-soluble material which facilities the spraying in farmland [13].…”

Section: Introductionmentioning

confidence: 99%

Global Transcriptome Changes of Elongating Internode of Sugarcane in Response to Mepiquat Chloride

Chen

Fan

Zhou

et al. 2020

Preprint

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Background: Mepiquat chloride (DPC) is an extensively used chemical to control internode growth and compact canopies in cultured plants. Previous studies suggested that DPC could inhibit gibberellin biosynthesis in sugarcane. Unfortunately, the molecular mechanism underlying the suppressive effects of DPC on plant growth is still largely unknown. Results: In the present study, we first obtained the high-quality long transcripts from internode of sugarcane by PacBio Sequel System. A total of 72,671 isoforms with N50 as 3,073 were generated. These long isoforms were used for the following RNA-seq as reference. Subsequently, short reads generated from Illumina Hiseq 4000 platform were used for comparing the differentially expressed genes in DPC and control groups. The transcriptome profiling showed the 6 days post DPC treatment had the most significant changed genes. These genes were related to plant hormone signal transduction and biosynthesis of several metabolites, indicating DPC affected multiple pathways beside depressed gibberellin biosynthesis. The network of DPC on the key stage was illustrated by weighted gene co-expression network analysis (WGCNA). Among the constructed 36 modules, the top positive correlated module with stage of 6 day post spraying DPC was sienna3. Stf0 sulphotransferase, cyclin-like F-box and HOX12 were the hub genes in sienna3 that had high correlation with other genes in this module. The qPCR demonstrated the high accuracy of RNA-seq result. Conclusion: Taken together, we demonstrated the key role of these genes in DPC-induced growth inhibition in sugarcane.

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Mepiquat chloride-priming induced salt tolerance during seed germination of cotton (Gossypium hirsutum L.) through regulating water transport and K+/Na+ homeostasis

Cited by 29 publications

References 34 publications

Nitrogen Enhances Salt Tolerance by Modulating the Antioxidant Defense System and Osmoregulation Substance Content in Gossypium hirsutum

Nitrogen Enhances Salt Tolerance by Modulating the Antioxidant Defense System and Osmoregulation Substance Content in Gossypium hirsutum

Screening and evaluation of reliable traits of upland cotton (Gossypium hirsutum L.) genotypes for salt tolerance at the seedling growth stage

Global Transcriptome Changes of Elongating Internode of Sugarcane in Response to Mepiquat Chloride

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