Salt Tolerance of Cotton (Gossypium hirsutum L.)

Ahmad, Saghir; Khan, Noor-ul-Islam; Iqbal, Muhammad; Hussain, Altaf; Hassan, M Waqar

doi:10.3923/ajps.2002.715.719

Cited by 80 publications

(5 citation statements)

References 27 publications

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“…Although cotton is the second most salt-tolerant herbaceous crop [8, 9], its growth and productivity are adversely affected by high salinity, especially at germination and the young seedling stage [10]. Salinity suppresses primary root growth [11], inhibits the length and numbers of secondary roots [12], and limits photosynthesis and respiration, flowering, boll and fiber quality, and ion uptake in cotton, resulting in significant yield losses [13].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive analysis of differentially expressed genes and transcriptional regulation induced by salt stress in two contrasting cotton genotypes

et al. 2014

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BackgroundCotton (Gossypium spp.) is one of the major fibre crops of the world. Although it is classified as salt tolerant crop, cotton growth and productivity are adversely affected by high salinity, especially at germination and seedling stages. Identification of genes and miRNAs responsible for salt tolerance in upland cotton (Gossypium hirsutum L.) would help reveal the molecular mechanisms of salt tolerance. We performed physiological experiments and transcriptome sequencing (mRNA-seq and small RNA-seq) of cotton leaves under salt stress using Illumina sequencing technology.ResultsWe investigated two distinct salt stress phases—dehydration (4 h) and ionic stress (osmotic restoration; 24 h)—that were identified by physiological changes of 14-day-old seedlings of two cotton genotypes, one salt tolerant and the other salt sensitive, during a 72-h NaCl exposure. A comparative transcriptomics was used to monitor gene and miRNA differential expression at two time points (4 and 24 h) in leaves of the two cotton genotypes under salinity conditions. The expression patterns of differentially co-expressed unigenes were divided into six groups using short time-servies expression miner software. During a 24-h salt exposure, 819 transcription factor unigenes were differentially expressed in both genotypes, with 129 unigenes specifically expressed in the salt-tolerant genotype. Under salt stress, 108 conserved miRNAs from known families were differentially expressed at two time points in the salt-tolerant genotype. We further analyzed the predicted target genes of these miRNAs along with the transcriptome for each time point. Important expressed genes encoding membrane receptors, transporters, and pathways involved in biosynthesis and signal transduction of calcium-dependent protein kinase, mitogen-activated protein kinase, and hormones (abscisic acid and ethylene) were up-regulated. We also analyzed the salt stress response of some key miRNAs and their target genes and found that the expressions of five of nine target genes exhibited significant inverse correlations with their corresponding miRNAs. On the basis of these results, we constructed molecular regulatory pathways and a potential regulatory network for these salt-responsive miRNAs.ConclusionsOur comprehensive transcriptome analysis has provided new insights into salt-stress response of upland cotton. The results should contribute to the development of genetically modified cotton with salt tolerance.Electronic supplementary materialThe online version of this article (doi:10.1186/1471-2164-15-760) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Comprehensive analysis of differentially expressed genes and transcriptional regulation induced by salt stress in two contrasting cotton genotypes

et al. 2014

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“…It was previously reported that a Na + rich environment suppresses the uptake of other elements in cotton and Amaranthaceae plants (Ahmad et al 2002;Takagi and Yamada 2013). To our surprise, levels of neither major (K + , Ca 2+ and Mg 2+ ) or minor (Fe 2+ , Mn 2+ , Zn 2+ and Cu 2+ ) essential elements were significantly affected by high EC in all plant species.…”

Section: Plant Mineral Contents and Sodium Uptake Capacitymentioning

confidence: 99%

Effect of salinity on the cotton cultivation and introduction of Amaranthaceae halophytes in the Yellow River Delta, China.

Yamada

2020

agriRxiv

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Cotton is a main cash crop in the Yellow River Delta in China. Although cotton is known for its high salt tolerance, cotton yield is severely affected by excessive salt accumulation in soil. A large amount of the Yellow River water is introduced annually to leach surface salts; however, it has limited effects due to poor soil physical quality. In this study, we aimed to investigate the impact of soil salinity on cotton growth and the viability of Amaranthaceae halophytes as alternative crops. Cotton and Amaranthaceae plants, including Suaeda salsa, Kochia scoparia, swiss chard, table beets and spinach, were planted in a large field in the Yellow River Delta that had spatial differentiation in terms of soil electrical conductivity (EC). Our analysis on soil revealed that Na+ was the major cause of high EC; however, soil alkalization was not observed in highly salinized areas. Cotton biomass showed a strong negative correlation with soil EC. Although all tested Amaranthaceae plants also decreased biomass in high EC areas, this effect was clearly less pronounced in S. salsa and K. scoparia. To our surprise, levels of major (K+, Ca2+ and Mg2+) or minor (Fe2+, Mn2+, Zn2+ and Cu2+) essential elements were not significantly affected by soil EC in all plant species, suggesting that ion imbalance was not the main factor of growth reduction. All Amaranthaceae halophytes absorbed more Na+ but less Ca2+ than cotton, thus it would be possible that Amaranthaceae plants function better than cotton in terms of maintaining soil quality.

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“…It has been reported that salinity affects plant physiology through changes of water and ionic status in the cells because of ionic imbalance due to excessive accumulation of Na and Cl and reduced uptake of other mineral nutrients, such as K, Ca and Mg (Hasegawa et al, 2000). According to Saghir et al (2002), the ionic stress affects plant growth by increasing Na and Cl levels in cells in response to high concentrations of NaCl, and decreased Ca, K, and Mg concentrations. This could be also attributed to the competition of Na with the uptake K, Ca, Mg resulting in a K/Na, Ca/Na and Mg/Na antagonism (Hosseini and Thengane, 2007).…”

Section: Mineralsmentioning

confidence: 99%

NUTRIENT COMPOSITION, ANTIOXIDANT COMPONENTS AND ASCORBIC ACID CONTENT RESPONSE OF PEPPER FRUIT (Capsicum annuum L.) CULTIVARS GROWN UNDER SALT STRESS

M.J.

G.V.

L.B

et al. 2021

IJB

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Purpose: Salinity stress occurs due to the accumulation of high levels of salts in soil, which ultimately leads to the impairment of plant growth and crop loss. Stress tolerance-inducing compounds have a remarkable ability to improve growth and minimize the effects of salinity stress without negatively affecting the environment by controlling the physiological and molecular activities in plants. Methodology: The pots were arranged in a complete randomized design with one plant per pot and four replicates per treatment and carried out in 2017 and 2018 to study the influence of four levels of NaCl (0, 50, 100 and 200 mM) on the antioxidant, ascorbic acid, organic and inorganic compounds of three pepper fruits cultivars (‘Granada’, ‘Goliath’ and ‘Nobili’) at mature stage. Findings: The results obtained showed that salinity decreased the mineral content (Ca, K, Zn, Mg, Mn, Iron, S and P), relative water content, and agromorphological parameters of pepper fruit. This decrease was accompanied by a significant increase of Na, soluble proteins, proline content, soluble sugar (fructose, glucose) and antioxidants, including total phenolics and ﬂavonoids, and reduced ascorbic acid and β-carotene content. It could be an indicator of salinity tolerance which explains the maintenance of a good water status among the studied plants. However, a varietal difference response to salt stress was observed between the studied varieties. Indeed, the varieties Granada and Nobili are characterized by their vigour in absence as in the presence of salt. Under the studied salinity level there was an enhancement of health-promoting compounds (phenolic compounds, ﬂavonoids, β-carotene and ascorbic acid) synthesis in pepper fruits, with signifcant changes in other quality parameters. Unique contribution to theory, practice and policy: It is concluded that varieties ‘Granada’ and ‘Nobili’ is more tolerant to salinity compared to the variety ‘Goliath’. Hence, they have a significant role to play in agriculture, food, and economy.

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Salt Tolerance of Cotton (Gossypium hirsutum L.)

Cited by 80 publications

References 27 publications

Comprehensive analysis of differentially expressed genes and transcriptional regulation induced by salt stress in two contrasting cotton genotypes

Comprehensive analysis of differentially expressed genes and transcriptional regulation induced by salt stress in two contrasting cotton genotypes

Effect of salinity on the cotton cultivation and introduction of Amaranthaceae halophytes in the Yellow River Delta, China.

NUTRIENT COMPOSITION, ANTIOXIDANT COMPONENTS AND ASCORBIC ACID CONTENT RESPONSE OF PEPPER FRUIT (Capsicum annuum L.) CULTIVARS GROWN UNDER SALT STRESS

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