Effects of salt and waterlogging stresses and their combination on leaf photosynthesis, chloroplast ATP synthesis, and antioxidant capacity in wheat

Zheng, Chunfang; Jiang, Dong; Liu, Fulai; Dai, Tingbo; Jing, Qi; Cao, Weixing

doi:10.1016/j.plantsci.2009.01.015

Cited by 202 publications

(136 citation statements)

References 48 publications

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“…In contrast to our findings, the increased total soluble protein has been reported under saline regimes in wheat (Zheng et al, 2009;Farouk, 2011;Barakat et al, 2013;Perveen et al, 2013), Erythrina variegata seedlings (Muthuchelian et al, 2003), green gram (Kumaravelu et al, 2000) and Arachis hypogaea L. (Verma et al, 2011). Similarly, Krishnan and Kumari (2008) also reported TRIA treated soybean plants with improved protein content under saline conditions.…”

Section: Discussioncontrasting

confidence: 93%

Triacontanol-induced Regulation in the Key Osmoprotectants and Oxidative Defense System of Sunflower Plants at Various Growth Stages under Salt Stress

Aziz¹,

Shahbaz²

2015

IJAB

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To cite this paper: Aziz, R. and M. Shahbaz, 2015. Triacontanol-induced regulation in the key osmoprotectants and oxidative defense system of sunflower plants at various growth stages under salt stress. AbstractSalinity is one of the major environmental constraints for limiting crop production at the global level. Exogenous application of triacontanol has the ability to ameliorate the adverse effects of abiotic stresses including salinity stress by modulating a number of physio-biochemical processes in different plants. A wire house study was conducted to explore the prospective role of foliar-applied triacontanol (TRIA) in two sunflower (Helianthus annuus L.) cultivars (SMH-907 and SMH-917) at various growth stages under saline conditions. Both sunflower cultivars were grown-up in sand medium endowed with Hoagland's nutrient solution (full strength) under control (0 mM NaCl) and salt stress (150 mM NaCl) conditions. Foliar spray of three TRIA levels [0 (water spray), 50 and 100 µM] were pertained at three growth stages i.e. vegetative, flowering and vegetative + flowering stages. Imposition of salinity decreased shoot and root dry weights, while increased the accumulation of free proline, glycinebetaine (GB) and activity of glutathione reductase (GR) enzyme. However, a significant salt-induced suppression was observed in the activities of peroxidase (POD) and superoxide dismutase (SOD) enzymes. Foliar-applied TRIA improved the activities of POD, SOD and GR enzymes along with substantial increase in the free proline and glycinebetaine contents while activity of catalase (CAT) enzyme and total soluble protein contents remained unchanged under saline stress at all growth stages in both sunflower cultivars. Overall, foliar-applied TRIA was effective in ameliorating the salt-induced adverse effects on plant growth in terms of shoot and root dry weights of both sunflower cultivars particularly at vegetative growth stage by upregulating the activities of antioxidant enzymes and level of osmoprotectants.

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Section: Discussioncontrasting

confidence: 93%

Triacontanol-induced Regulation in the Key Osmoprotectants and Oxidative Defense System of Sunflower Plants at Various Growth Stages under Salt Stress

Aziz¹,

Shahbaz²

2015

IJAB

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“…Waterlogging significantly decreased leaf gas exchange at lower salinity levels, but salt stress effects prevailed especially at higher levels of soil salinity. Zheng et al (2009), studying the individual and combined effects of salinity and waterlogging on wheat, obtained similar results where the main stress factor was salinity, which severely reduced leaf gas exchange, while waterlogging had practically no influence when combined with salinity.…”

Section: Discussionmentioning

confidence: 71%

Isolated and combined effects of soil salinity and waterlogging in seedlings of ‘Green Dwarf’ coconut

Medeiros

Oliveira

Lacerda

et al. 2018

SCA

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Soil salinization is a problem commonly found in semi-arid regions. In addition, the problem of salinity is aggravated in clayey soils when accompanied by cycles of waterlogging in the rainy season or when excess irrigation is applied. In this work we evaluated the isolated and combined effects of soil salinity and waterlogging on the responses of young plants of 'Green Dwarf' coconut. The experiment was conducted under controlled environment in a complete randomized block design, arranged in split plots with five replications. The plots comprised five waterlogging cycles (0, 1, 2, 3 and 4), each with a duration of four days, and applied at 30, 60, 90 and 120 days into the experimental period, with the sub-plots consisting of five levels of soil salinity (1.70, 11.07, 16.44, 22.14 and 25.20 dS m -1 ). Response of coconut seedlings to waterlogging was dependent on the level of soil salinity, with waterlogging significantly impairing biomass accumulation and leaf expansion at low soil salinity levels, but causing no additional harm at elevated salinity. Leaf gas exchange was reduced mainly due to soil salinity, and this response was related to stomatal and non-stomatal effects. Seedlings of 'Green Dwarf' coconut used in this study were classified as moderately-tolerant to salinity when grown in soils with an electrical conductivity up to 11.07 dS m -1 , having the potential to be used in revegetation programs of salt-affected areas, provided that these areas are not exposed to frequent waterlogging cycles. ResumoA salinização dos solos é um problema comumente encontrado em regiões semiáridas. Além disso, nos solos mais argilosos, o problema da salinidade vem acompanhado de ciclos de encharcamento do solo, no período de chuvas ou no caso de irrigação excessiva. Neste trabalho, avaliamos os efeitos da salinidade do solo e do encharcamento, de maneira isolada e combinada, nas respostas adaptativas de plantas jovens de coqueiro-anão-verde. O experimento foi conduzido em ambiente protegido, sob delineamento estatístico de blocos casualizados, arranjados em parcelas subdivididas com cinco repetições. As parcelas foram constituidas por cinco ciclos de encharcamento (0, 1, 2, 3 e 4), com duração de quatro dias cada, aos 30, 60, 90 e 120 dias do período experimental e as subparcelas foram constituídas por cinco níveis de salinidade do solo (1,70; 11,07; 16,44; 22,14 e 25,20 dS m -1 ). As respostas das mudas de coqueiro ao encharcamento dependeram do nível de salinidade do solo, os quais reduziram significativamente o acúmulo de biomassa e a expansão foliar em baixos níveis de salinidade do solo. Contudo, os níveis de encharcamento não causaram danos adicionais sob elevados níveis de salinidade. As trocas gasosas foliares foram reduzidas principalmente devido à salinidade do solo, e esta resposta pode estar relacionada aos efeitos estomáticos e não estomáticos. As mudas de coqueiro 'Anão Verde' utilizadas neste experiment foram classificadas como moderadamente tolerantes à salinidade, quando cultivadas em solos...

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“…This is also related to ion accumulation at toxic levels in photosynthetically active leaf cells (Tester and Davenport 2003). A decline in P N as a consequence of NaCl toxicity has been reported by several authors in different rice cultivars (Abdullah et al 2001;Dionisio-Sese and Tobita 2000;Djanaguiraman et al 2006;Moradi and Ismail 2007;Pieters and Nuñez 2008;Walia et al 2005;Welfare et al 1996) as well as in other cereal crops such as sorghum (Netondo et al 2004), wheat (Sharma et al 2005;Zheng et al 2009) and naked oat (Zhao et al 2007). In accordance with this, we observed that P N of both cultivars declined significantly under 150 mM NaCl during the vegetative growth (Fig.…”

Section: Discussionmentioning

confidence: 79%

“…4). Loss of chlorophyll pigment (Bahaji et al 2002;Siringam et al 2009) and reductions in the F v /F m ratio under salinity stress were also reported for other rice cultivars (Abdullah et al 2001;Cha-um et al 2007;Djanaguiraman et al 2006;Siringam et al 2009;Yamane et al 2008) as well as in sorghum (Netondo et al 2004), naked oat (Zhao et al 2007), wheat (Zheng et al 2009) and chickpea (Eyidogan and Ö z 2007).…”

Section: Discussionmentioning

confidence: 79%

Morpho-physiological variations in response to NaCl stress during vegetative and reproductive development of rice

et al. 2012

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The complex nature of plant resistance to adverse environmental conditions, such as salinity and drought requires a better understanding of the stress-induced changes that may be involved in tolerance mechanisms. Here we investigate stress-related morpho-physiological effects during vegetative and reproductive growth in two Japonica rice cultivars (Bomba and Bahia) exposed to a range of NaCl concentrations from the seedling stage. The stress-related detrimental effects were observed either earlier or to a higher extent in cv. Bomba than in Bahia. Damages to the photosynthetic apparatus were related to loss of chlorophyll (Chl) and to a decrease of the maximum potential efficiency of PSII (F v /F m ), affecting negatively net CO 2 assimilation rate (P N ). Stress-related leaf anatomical alterations were analysed during the vegetative and reproductive stages. The size of bulliform cells as well as dimensions related to the vascular system increased under mild stress but decreased in the longer term or under higher stress level. The pattern of the anatomical alterations observed at the reproductive stage under 20 mM NaCl was reflected in poor panicle development and yield loss, with effects more pronounced in cv. Bomba than in Bahia. In summary, our results show that some physiological and, particularly, leaf anatomical responses induced by NaCl stress are distinctive indicators of sensitivity to salt stress in rice cultivars.

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Effects of salt and waterlogging stresses and their combination on leaf photosynthesis, chloroplast ATP synthesis, and antioxidant capacity in wheat

Cited by 202 publications

References 48 publications

Triacontanol-induced Regulation in the Key Osmoprotectants and Oxidative Defense System of Sunflower Plants at Various Growth Stages under Salt Stress

Triacontanol-induced Regulation in the Key Osmoprotectants and Oxidative Defense System of Sunflower Plants at Various Growth Stages under Salt Stress

Isolated and combined effects of soil salinity and waterlogging in seedlings of ‘Green Dwarf’ coconut

Morpho-physiological variations in response to NaCl stress during vegetative and reproductive development of rice

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